1 //! This module is the central place for machine code emission.
2 //! It defines an implementation of wasmparser's Visitor trait
3 //! for `CodeGen`; which defines a visitor per op-code,
4 //! which validates and dispatches to the corresponding
5 //! machine code emitter.
6 
7 use crate::abi::RetArea;
8 use crate::codegen::{
9     Callee, CodeGen, CodeGenError, ConditionalBranch, ControlStackFrame, Emission, FnCall,
10     UnconditionalBranch, control_index,
11 };
12 use crate::masm::{
13     AtomicWaitKind, DivKind, Extend, ExtractLaneKind, FloatCmpKind, IntCmpKind, LoadKind,
14     MacroAssembler, MulWideKind, OperandSize, RegImm, RemKind, ReplaceLaneKind, RmwOp,
15     RoundingMode, SPOffset, ShiftKind, Signed, SplatKind, SplatLoadKind, StoreKind, TruncKind,
16     V128AbsKind, V128AddKind, V128ConvertKind, V128ExtAddKind, V128ExtMulKind, V128ExtendKind,
17     V128LoadExtendKind, V128MaxKind, V128MinKind, V128MulKind, V128NarrowKind, V128NegKind,
18     V128SubKind, V128TruncKind, VectorCompareKind, VectorEqualityKind, Zero,
19 };
20 use crate::reg::{Reg, writable};
21 use crate::stack::{TypedReg, Val};
22 use crate::{Result, bail, ensure, format_err};
23 use regalloc2::RegClass;
24 use smallvec::{SmallVec, smallvec};
25 use wasmparser::{
26     BlockType, BrTable, Ieee32, Ieee64, MemArg, V128, VisitOperator, VisitSimdOperator,
27 };
28 use wasmtime_cranelift::TRAP_INDIRECT_CALL_TO_NULL;
29 use wasmtime_environ::{
30     FUNCREF_INIT_BIT, FuncIndex, GlobalIndex, MemoryIndex, TableIndex, TypeIndex, WasmHeapType,
31     WasmValType,
32 };
33 
34 /// A macro to define unsupported WebAssembly operators.
35 ///
36 /// This macro calls itself recursively;
37 /// 1. It no-ops when matching a supported operator.
38 /// 2. Defines the visitor function and panics when
39 ///    matching an unsupported operator.
40 macro_rules! def_unsupported {
41     ($( @$proposal:ident $op:ident $({ $($arg:ident: $argty:ty),* })? => $visit:ident $ann:tt)*) => {
42         $(
43             def_unsupported!(
44                 emit
45                     $op
46 
47                 fn $visit(&mut self $($(,$arg: $argty)*)?) -> Self::Output {
48                     $($(let _ = $arg;)*)?
49 
50                     Err(format_err!(CodeGenError::unimplemented_wasm_instruction()))
51                 }
52             );
53         )*
54     };
55 
56     (emit I32Const $($rest:tt)*) => {};
57     (emit I64Const $($rest:tt)*) => {};
58     (emit F32Const $($rest:tt)*) => {};
59     (emit F64Const $($rest:tt)*) => {};
60     (emit V128Const $($rest:tt)*) => {};
61     (emit F32Add $($rest:tt)*) => {};
62     (emit F64Add $($rest:tt)*) => {};
63     (emit F32Sub $($rest:tt)*) => {};
64     (emit F64Sub $($rest:tt)*) => {};
65     (emit F32Mul $($rest:tt)*) => {};
66     (emit F64Mul $($rest:tt)*) => {};
67     (emit F32Div $($rest:tt)*) => {};
68     (emit F64Div $($rest:tt)*) => {};
69     (emit F32Min $($rest:tt)*) => {};
70     (emit F64Min $($rest:tt)*) => {};
71     (emit F32Max $($rest:tt)*) => {};
72     (emit F64Max $($rest:tt)*) => {};
73     (emit F32Copysign $($rest:tt)*) => {};
74     (emit F64Copysign $($rest:tt)*) => {};
75     (emit F32Abs $($rest:tt)*) => {};
76     (emit F64Abs $($rest:tt)*) => {};
77     (emit F32Neg $($rest:tt)*) => {};
78     (emit F64Neg $($rest:tt)*) => {};
79     (emit F32Floor $($rest:tt)*) => {};
80     (emit F64Floor $($rest:tt)*) => {};
81     (emit F32Ceil $($rest:tt)*) => {};
82     (emit F64Ceil $($rest:tt)*) => {};
83     (emit F32Nearest $($rest:tt)*) => {};
84     (emit F64Nearest $($rest:tt)*) => {};
85     (emit F32Trunc $($rest:tt)*) => {};
86     (emit F64Trunc $($rest:tt)*) => {};
87     (emit F32Sqrt $($rest:tt)*) => {};
88     (emit F64Sqrt $($rest:tt)*) => {};
89     (emit F32Eq $($rest:tt)*) => {};
90     (emit F64Eq $($rest:tt)*) => {};
91     (emit F32Ne $($rest:tt)*) => {};
92     (emit F64Ne $($rest:tt)*) => {};
93     (emit F32Lt $($rest:tt)*) => {};
94     (emit F64Lt $($rest:tt)*) => {};
95     (emit F32Gt $($rest:tt)*) => {};
96     (emit F64Gt $($rest:tt)*) => {};
97     (emit F32Le $($rest:tt)*) => {};
98     (emit F64Le $($rest:tt)*) => {};
99     (emit F32Ge $($rest:tt)*) => {};
100     (emit F64Ge $($rest:tt)*) => {};
101     (emit F32ConvertI32S $($rest:tt)*) => {};
102     (emit F32ConvertI32U $($rest:tt)*) => {};
103     (emit F32ConvertI64S $($rest:tt)*) => {};
104     (emit F32ConvertI64U $($rest:tt)*) => {};
105     (emit F64ConvertI32S $($rest:tt)*) => {};
106     (emit F64ConvertI32U $($rest:tt)*) => {};
107     (emit F64ConvertI64S $($rest:tt)*) => {};
108     (emit F64ConvertI64U $($rest:tt)*) => {};
109     (emit F32ReinterpretI32 $($rest:tt)*) => {};
110     (emit F64ReinterpretI64 $($rest:tt)*) => {};
111     (emit F32DemoteF64 $($rest:tt)*) => {};
112     (emit F64PromoteF32 $($rest:tt)*) => {};
113     (emit I32Add $($rest:tt)*) => {};
114     (emit I64Add $($rest:tt)*) => {};
115     (emit I32Sub $($rest:tt)*) => {};
116     (emit I32Mul $($rest:tt)*) => {};
117     (emit I32DivS $($rest:tt)*) => {};
118     (emit I32DivU $($rest:tt)*) => {};
119     (emit I64DivS $($rest:tt)*) => {};
120     (emit I64DivU $($rest:tt)*) => {};
121     (emit I64RemU $($rest:tt)*) => {};
122     (emit I64RemS $($rest:tt)*) => {};
123     (emit I32RemU $($rest:tt)*) => {};
124     (emit I32RemS $($rest:tt)*) => {};
125     (emit I64Mul $($rest:tt)*) => {};
126     (emit I64Sub $($rest:tt)*) => {};
127     (emit I32Eq $($rest:tt)*) => {};
128     (emit I64Eq $($rest:tt)*) => {};
129     (emit I32Ne $($rest:tt)*) => {};
130     (emit I64Ne $($rest:tt)*) => {};
131     (emit I32LtS $($rest:tt)*) => {};
132     (emit I64LtS $($rest:tt)*) => {};
133     (emit I32LtU $($rest:tt)*) => {};
134     (emit I64LtU $($rest:tt)*) => {};
135     (emit I32LeS $($rest:tt)*) => {};
136     (emit I64LeS $($rest:tt)*) => {};
137     (emit I32LeU $($rest:tt)*) => {};
138     (emit I64LeU $($rest:tt)*) => {};
139     (emit I32GtS $($rest:tt)*) => {};
140     (emit I64GtS $($rest:tt)*) => {};
141     (emit I32GtU $($rest:tt)*) => {};
142     (emit I64GtU $($rest:tt)*) => {};
143     (emit I32GeS $($rest:tt)*) => {};
144     (emit I64GeS $($rest:tt)*) => {};
145     (emit I32GeU $($rest:tt)*) => {};
146     (emit I64GeU $($rest:tt)*) => {};
147     (emit I32Eqz $($rest:tt)*) => {};
148     (emit I64Eqz $($rest:tt)*) => {};
149     (emit I32And $($rest:tt)*) => {};
150     (emit I64And $($rest:tt)*) => {};
151     (emit I32Or $($rest:tt)*) => {};
152     (emit I64Or $($rest:tt)*) => {};
153     (emit I32Xor $($rest:tt)*) => {};
154     (emit I64Xor $($rest:tt)*) => {};
155     (emit I32Shl $($rest:tt)*) => {};
156     (emit I64Shl $($rest:tt)*) => {};
157     (emit I32ShrS $($rest:tt)*) => {};
158     (emit I64ShrS $($rest:tt)*) => {};
159     (emit I32ShrU $($rest:tt)*) => {};
160     (emit I64ShrU $($rest:tt)*) => {};
161     (emit I32Rotl $($rest:tt)*) => {};
162     (emit I64Rotl $($rest:tt)*) => {};
163     (emit I32Rotr $($rest:tt)*) => {};
164     (emit I64Rotr $($rest:tt)*) => {};
165     (emit I32Clz $($rest:tt)*) => {};
166     (emit I64Clz $($rest:tt)*) => {};
167     (emit I32Ctz $($rest:tt)*) => {};
168     (emit I64Ctz $($rest:tt)*) => {};
169     (emit I32Popcnt $($rest:tt)*) => {};
170     (emit I64Popcnt $($rest:tt)*) => {};
171     (emit I32WrapI64 $($rest:tt)*) => {};
172     (emit I64ExtendI32S $($rest:tt)*) => {};
173     (emit I64ExtendI32U $($rest:tt)*) => {};
174     (emit I32Extend8S $($rest:tt)*) => {};
175     (emit I32Extend16S $($rest:tt)*) => {};
176     (emit I64Extend8S $($rest:tt)*) => {};
177     (emit I64Extend16S $($rest:tt)*) => {};
178     (emit I64Extend32S $($rest:tt)*) => {};
179     (emit I32TruncF32S $($rest:tt)*) => {};
180     (emit I32TruncF32U $($rest:tt)*) => {};
181     (emit I32TruncF64S $($rest:tt)*) => {};
182     (emit I32TruncF64U $($rest:tt)*) => {};
183     (emit I64TruncF32S $($rest:tt)*) => {};
184     (emit I64TruncF32U $($rest:tt)*) => {};
185     (emit I64TruncF64S $($rest:tt)*) => {};
186     (emit I64TruncF64U $($rest:tt)*) => {};
187     (emit I32ReinterpretF32 $($rest:tt)*) => {};
188     (emit I64ReinterpretF64 $($rest:tt)*) => {};
189     (emit LocalGet $($rest:tt)*) => {};
190     (emit LocalSet $($rest:tt)*) => {};
191     (emit Call $($rest:tt)*) => {};
192     (emit End $($rest:tt)*) => {};
193     (emit Nop $($rest:tt)*) => {};
194     (emit If $($rest:tt)*) => {};
195     (emit Else $($rest:tt)*) => {};
196     (emit Block $($rest:tt)*) => {};
197     (emit Loop $($rest:tt)*) => {};
198     (emit Br $($rest:tt)*) => {};
199     (emit BrIf $($rest:tt)*) => {};
200     (emit Return $($rest:tt)*) => {};
201     (emit Unreachable $($rest:tt)*) => {};
202     (emit LocalTee $($rest:tt)*) => {};
203     (emit GlobalGet $($rest:tt)*) => {};
204     (emit GlobalSet $($rest:tt)*) => {};
205     (emit Select $($rest:tt)*) => {};
206     (emit Drop $($rest:tt)*) => {};
207     (emit BrTable $($rest:tt)*) => {};
208     (emit CallIndirect $($rest:tt)*) => {};
209     (emit TableInit $($rest:tt)*) => {};
210     (emit TableCopy $($rest:tt)*) => {};
211     (emit TableGet $($rest:tt)*) => {};
212     (emit TableSet $($rest:tt)*) => {};
213     (emit TableGrow $($rest:tt)*) => {};
214     (emit TableSize $($rest:tt)*) => {};
215     (emit TableFill $($rest:tt)*) => {};
216     (emit ElemDrop $($rest:tt)*) => {};
217     (emit MemoryInit $($rest:tt)*) => {};
218     (emit MemoryCopy $($rest:tt)*) => {};
219     (emit DataDrop $($rest:tt)*) => {};
220     (emit MemoryFill $($rest:tt)*) => {};
221     (emit MemorySize $($rest:tt)*) => {};
222     (emit MemoryGrow $($rest:tt)*) => {};
223     (emit I32Load $($rest:tt)*) => {};
224     (emit I32Load8S $($rest:tt)*) => {};
225     (emit I32Load8U $($rest:tt)*) => {};
226     (emit I32Load16S $($rest:tt)*) => {};
227     (emit I32Load16U $($rest:tt)*) => {};
228     (emit I64Load8S $($rest:tt)*) => {};
229     (emit I64Load8U $($rest:tt)*) => {};
230     (emit I64Load16S $($rest:tt)*) => {};
231     (emit I64Load16U $($rest:tt)*) => {};
232     (emit I64Load32S $($rest:tt)*) => {};
233     (emit I64Load32U $($rest:tt)*) => {};
234     (emit I64Load $($rest:tt)*) => {};
235     (emit I32Store $($rest:tt)*) => {};
236     (emit I32Store8 $($rest:tt)*) => {};
237     (emit I32Store16 $($rest:tt)*) => {};
238     (emit I64Store $($rest:tt)*) => {};
239     (emit I64Store8 $($rest:tt)*) => {};
240     (emit I64Store16 $($rest:tt)*) => {};
241     (emit I64Store32 $($rest:tt)*) => {};
242     (emit F32Load $($rest:tt)*) => {};
243     (emit F32Store $($rest:tt)*) => {};
244     (emit F64Load $($rest:tt)*) => {};
245     (emit F64Store $($rest:tt)*) => {};
246     (emit I32TruncSatF32S $($rest:tt)*) => {};
247     (emit I32TruncSatF32U $($rest:tt)*) => {};
248     (emit I32TruncSatF64S $($rest:tt)*) => {};
249     (emit I32TruncSatF64U $($rest:tt)*) => {};
250     (emit I64TruncSatF32S $($rest:tt)*) => {};
251     (emit I64TruncSatF32U $($rest:tt)*) => {};
252     (emit I64TruncSatF64S $($rest:tt)*) => {};
253     (emit I64TruncSatF64U $($rest:tt)*) => {};
254     (emit V128Load $($rest:tt)*) => {};
255     (emit V128Store $($rest:tt)*) => {};
256     (emit I64Add128 $($rest:tt)*) => {};
257     (emit I64Sub128 $($rest:tt)*) => {};
258     (emit I64MulWideS $($rest:tt)*) => {};
259     (emit I64MulWideU $($rest:tt)*) => {};
260     (emit I32AtomicLoad8U $($rest:tt)*) => {};
261     (emit I32AtomicLoad16U $($rest:tt)*) => {};
262     (emit I32AtomicLoad $($rest:tt)*) => {};
263     (emit I64AtomicLoad8U $($rest:tt)*) => {};
264     (emit I64AtomicLoad16U $($rest:tt)*) => {};
265     (emit I64AtomicLoad32U $($rest:tt)*) => {};
266     (emit I64AtomicLoad $($rest:tt)*) => {};
267     (emit V128Load8x8S $($rest:tt)*) => {};
268     (emit V128Load8x8U $($rest:tt)*) => {};
269     (emit V128Load16x4S $($rest:tt)*) => {};
270     (emit V128Load16x4U $($rest:tt)*) => {};
271     (emit V128Load32x2S $($rest:tt)*) => {};
272     (emit V128Load32x2U $($rest:tt)*) => {};
273     (emit V128Load8Splat $($rest:tt)*) => {};
274     (emit V128Load16Splat $($rest:tt)*) => {};
275     (emit V128Load32Splat $($rest:tt)*) => {};
276     (emit V128Load64Splat $($rest:tt)*) => {};
277     (emit I8x16Splat $($rest:tt)*) => {};
278     (emit I16x8Splat $($rest:tt)*) => {};
279     (emit I32x4Splat $($rest:tt)*) => {};
280     (emit I64x2Splat $($rest:tt)*) => {};
281     (emit F32x4Splat $($rest:tt)*) => {};
282     (emit F64x2Splat $($rest:tt)*) => {};
283     (emit I32AtomicStore8 $($rest:tt)*) => {};
284     (emit I32AtomicStore16 $($rest:tt)*) => {};
285     (emit I32AtomicStore $($rest:tt)*) => {};
286     (emit I64AtomicStore8 $($rest:tt)*) => {};
287     (emit I64AtomicStore16 $($rest:tt)*) => {};
288     (emit I64AtomicStore32 $($rest:tt)*) => {};
289     (emit I64AtomicStore $($rest:tt)*) => {};
290     (emit I32AtomicRmw8AddU $($rest:tt)*) => {};
291     (emit I32AtomicRmw16AddU $($rest:tt)*) => {};
292     (emit I32AtomicRmwAdd $($rest:tt)*) => {};
293     (emit I64AtomicRmw8AddU $($rest:tt)*) => {};
294     (emit I64AtomicRmw16AddU $($rest:tt)*) => {};
295     (emit I64AtomicRmw32AddU $($rest:tt)*) => {};
296     (emit I64AtomicRmwAdd $($rest:tt)*) => {};
297     (emit I8x16Shuffle $($rest:tt)*) => {};
298     (emit I8x16Swizzle $($rest:tt)*) => {};
299     (emit I32AtomicRmw8SubU $($rest:tt)*) => {};
300     (emit I32AtomicRmw16SubU $($rest:tt)*) => {};
301     (emit I32AtomicRmwSub $($rest:tt)*) => {};
302     (emit I64AtomicRmw8SubU $($rest:tt)*) => {};
303     (emit I64AtomicRmw16SubU $($rest:tt)*) => {};
304     (emit I64AtomicRmw32SubU $($rest:tt)*) => {};
305     (emit I64AtomicRmwSub $($rest:tt)*) => {};
306     (emit I32AtomicRmw8XchgU $($rest:tt)*) => {};
307     (emit I32AtomicRmw16XchgU $($rest:tt)*) => {};
308     (emit I32AtomicRmwXchg $($rest:tt)*) => {};
309     (emit I64AtomicRmw8XchgU $($rest:tt)*) => {};
310     (emit I64AtomicRmw16XchgU $($rest:tt)*) => {};
311     (emit I64AtomicRmw32XchgU $($rest:tt)*) => {};
312     (emit I64AtomicRmwXchg $($rest:tt)*) => {};
313     (emit I8x16ExtractLaneS $($rest:tt)*) => {};
314     (emit I8x16ExtractLaneU $($rest:tt)*) => {};
315     (emit I16x8ExtractLaneS $($rest:tt)*) => {};
316     (emit I16x8ExtractLaneU $($rest:tt)*) => {};
317     (emit I32x4ExtractLane $($rest:tt)*) => {};
318     (emit I64x2ExtractLane $($rest:tt)*) => {};
319     (emit F32x4ExtractLane $($rest:tt)*) => {};
320     (emit F64x2ExtractLane $($rest:tt)*) => {};
321     (emit I32AtomicRmw8AndU $($rest:tt)*) => {};
322     (emit I32AtomicRmw16AndU $($rest:tt)*) => {};
323     (emit I32AtomicRmwAnd $($rest:tt)*) => {};
324     (emit I64AtomicRmw8AndU $($rest:tt)*) => {};
325     (emit I64AtomicRmw16AndU $($rest:tt)*) => {};
326     (emit I64AtomicRmw32AndU $($rest:tt)*) => {};
327     (emit I64AtomicRmwAnd $($rest:tt)*) => {};
328     (emit I32AtomicRmw8OrU $($rest:tt)*) => {};
329     (emit I32AtomicRmw16OrU $($rest:tt)*) => {};
330     (emit I32AtomicRmwOr $($rest:tt)*) => {};
331     (emit I64AtomicRmw8OrU $($rest:tt)*) => {};
332     (emit I64AtomicRmw16OrU $($rest:tt)*) => {};
333     (emit I64AtomicRmw32OrU $($rest:tt)*) => {};
334     (emit I64AtomicRmwOr $($rest:tt)*) => {};
335     (emit I32AtomicRmw8XorU $($rest:tt)*) => {};
336     (emit I32AtomicRmw16XorU $($rest:tt)*) => {};
337     (emit I32AtomicRmwXor $($rest:tt)*) => {};
338     (emit I64AtomicRmw8XorU $($rest:tt)*) => {};
339     (emit I64AtomicRmw16XorU $($rest:tt)*) => {};
340     (emit I64AtomicRmw32XorU $($rest:tt)*) => {};
341     (emit I64AtomicRmwXor $($rest:tt)*) => {};
342     (emit I8x16ReplaceLane $($rest:tt)*) => {};
343     (emit I16x8ReplaceLane $($rest:tt)*) => {};
344     (emit I32x4ReplaceLane $($rest:tt)*) => {};
345     (emit I64x2ReplaceLane $($rest:tt)*) => {};
346     (emit F32x4ReplaceLane $($rest:tt)*) => {};
347     (emit F64x2ReplaceLane $($rest:tt)*) => {};
348     (emit I32AtomicRmw8CmpxchgU $($rest:tt)*) => {};
349     (emit I32AtomicRmw16CmpxchgU $($rest:tt)*) => {};
350     (emit I32AtomicRmwCmpxchg $($rest:tt)*) => {};
351     (emit I64AtomicRmw8CmpxchgU $($rest:tt)*) => {};
352     (emit I64AtomicRmw16CmpxchgU $($rest:tt)*) => {};
353     (emit I64AtomicRmw32CmpxchgU $($rest:tt)*) => {};
354     (emit I64AtomicRmwCmpxchg $($rest:tt)*) => {};
355     (emit I8x16Eq $($rest:tt)*) => {};
356     (emit I16x8Eq $($rest:tt)*) => {};
357     (emit I32x4Eq $($rest:tt)*) => {};
358     (emit I64x2Eq $($rest:tt)*) => {};
359     (emit F32x4Eq $($rest:tt)*) => {};
360     (emit F64x2Eq $($rest:tt)*) => {};
361     (emit I8x16Ne $($rest:tt)*) => {};
362     (emit I16x8Ne $($rest:tt)*) => {};
363     (emit I32x4Ne $($rest:tt)*) => {};
364     (emit I64x2Ne $($rest:tt)*) => {};
365     (emit F32x4Ne $($rest:tt)*) => {};
366     (emit F64x2Ne $($rest:tt)*) => {};
367     (emit I8x16LtS $($rest:tt)*) => {};
368     (emit I8x16LtU $($rest:tt)*) => {};
369     (emit I16x8LtS $($rest:tt)*) => {};
370     (emit I16x8LtU $($rest:tt)*) => {};
371     (emit I32x4LtS $($rest:tt)*) => {};
372     (emit I32x4LtU $($rest:tt)*) => {};
373     (emit I64x2LtS $($rest:tt)*) => {};
374     (emit F32x4Lt $($rest:tt)*) => {};
375     (emit F64x2Lt $($rest:tt)*) => {};
376     (emit I8x16LeS $($rest:tt)*) => {};
377     (emit I8x16LeU $($rest:tt)*) => {};
378     (emit I16x8LeS $($rest:tt)*) => {};
379     (emit I16x8LeU $($rest:tt)*) => {};
380     (emit I32x4LeS $($rest:tt)*) => {};
381     (emit I32x4LeU $($rest:tt)*) => {};
382     (emit I64x2LeS $($rest:tt)*) => {};
383     (emit F32x4Le $($rest:tt)*) => {};
384     (emit F64x2Le $($rest:tt)*) => {};
385     (emit I8x16GtS $($rest:tt)*) => {};
386     (emit I8x16GtU $($rest:tt)*) => {};
387     (emit I16x8GtS $($rest:tt)*) => {};
388     (emit I16x8GtU $($rest:tt)*) => {};
389     (emit I32x4GtS $($rest:tt)*) => {};
390     (emit I32x4GtU $($rest:tt)*) => {};
391     (emit I64x2GtS $($rest:tt)*) => {};
392     (emit F32x4Gt $($rest:tt)*) => {};
393     (emit F64x2Gt $($rest:tt)*) => {};
394     (emit I8x16GeS $($rest:tt)*) => {};
395     (emit I8x16GeU $($rest:tt)*) => {};
396     (emit I16x8GeS $($rest:tt)*) => {};
397     (emit I16x8GeU $($rest:tt)*) => {};
398     (emit I32x4GeS $($rest:tt)*) => {};
399     (emit I32x4GeU $($rest:tt)*) => {};
400     (emit I64x2GeS $($rest:tt)*) => {};
401     (emit F32x4Ge $($rest:tt)*) => {};
402     (emit F64x2Ge $($rest:tt)*) => {};
403     (emit MemoryAtomicWait32 $($rest:tt)*) => {};
404     (emit MemoryAtomicWait64 $($rest:tt)*) => {};
405     (emit MemoryAtomicNotify $($rest:tt)*) => {};
406     (emit AtomicFence $($rest:tt)*) => {};
407     (emit V128Not $($rest:tt)*) => {};
408     (emit V128And $($rest:tt)*) => {};
409     (emit V128AndNot $($rest:tt)*) => {};
410     (emit V128Or $($rest:tt)*) => {};
411     (emit V128Xor $($rest:tt)*) => {};
412     (emit V128Bitselect $($rest:tt)*) => {};
413     (emit V128AnyTrue $($rest:tt)*) => {};
414     (emit V128Load8Lane $($rest:tt)*) => {};
415     (emit V128Load16Lane $($rest:tt)*) => {};
416     (emit V128Load32Lane $($rest:tt)*) => {};
417     (emit V128Load64Lane $($rest:tt)*) => {};
418     (emit V128Store8Lane $($rest:tt)*) => {};
419     (emit V128Store16Lane $($rest:tt)*) => {};
420     (emit V128Store32Lane $($rest:tt)*) => {};
421     (emit V128Store64Lane $($rest:tt)*) => {};
422     (emit F32x4ConvertI32x4S $($rest:tt)*) => {};
423     (emit F32x4ConvertI32x4U $($rest:tt)*) => {};
424     (emit F64x2ConvertLowI32x4S $($rest:tt)*) => {};
425     (emit F64x2ConvertLowI32x4U $($rest:tt)*) => {};
426     (emit I8x16NarrowI16x8S $($rest:tt)*) => {};
427     (emit I8x16NarrowI16x8U $($rest:tt)*) => {};
428     (emit I16x8NarrowI32x4S $($rest:tt)*) => {};
429     (emit I16x8NarrowI32x4U $($rest:tt)*) => {};
430     (emit F32x4DemoteF64x2Zero $($rest:tt)*) => {};
431     (emit F64x2PromoteLowF32x4 $($rest:tt)*) => {};
432     (emit I16x8ExtendLowI8x16S $($rest:tt)*) => {};
433     (emit I16x8ExtendHighI8x16S $($rest:tt)*) => {};
434     (emit I16x8ExtendLowI8x16U $($rest:tt)*) => {};
435     (emit I16x8ExtendHighI8x16U $($rest:tt)*) => {};
436     (emit I32x4ExtendLowI16x8S $($rest:tt)*) => {};
437     (emit I32x4ExtendHighI16x8S $($rest:tt)*) => {};
438     (emit I32x4ExtendLowI16x8U $($rest:tt)*) => {};
439     (emit I32x4ExtendHighI16x8U $($rest:tt)*) => {};
440     (emit I64x2ExtendLowI32x4S $($rest:tt)*) => {};
441     (emit I64x2ExtendHighI32x4S $($rest:tt)*) => {};
442     (emit I64x2ExtendLowI32x4U $($rest:tt)*) => {};
443     (emit I64x2ExtendHighI32x4U $($rest:tt)*) => {};
444     (emit I8x16Add $($rest:tt)*) => {};
445     (emit I16x8Add $($rest:tt)*) => {};
446     (emit I32x4Add $($rest:tt)*) => {};
447     (emit I64x2Add $($rest:tt)*) => {};
448     (emit I8x16Sub $($rest:tt)*) => {};
449     (emit I16x8Sub $($rest:tt)*) => {};
450     (emit I32x4Sub $($rest:tt)*) => {};
451     (emit I64x2Sub $($rest:tt)*) => {};
452     (emit I16x8Mul $($rest:tt)*) => {};
453     (emit I32x4Mul $($rest:tt)*) => {};
454     (emit I64x2Mul $($rest:tt)*) => {};
455     (emit I8x16AddSatS $($rest:tt)*) => {};
456     (emit I16x8AddSatS $($rest:tt)*) => {};
457     (emit I8x16AddSatU $($rest:tt)*) => {};
458     (emit I16x8AddSatU $($rest:tt)*) => {};
459     (emit I8x16SubSatS $($rest:tt)*) => {};
460     (emit I16x8SubSatS $($rest:tt)*) => {};
461     (emit I8x16SubSatU $($rest:tt)*) => {};
462     (emit I16x8SubSatU $($rest:tt)*) => {};
463     (emit I8x16Abs $($rest:tt)*) => {};
464     (emit I16x8Abs $($rest:tt)*) => {};
465     (emit I32x4Abs $($rest:tt)*) => {};
466     (emit I64x2Abs $($rest:tt)*) => {};
467     (emit F32x4Abs $($rest:tt)*) => {};
468     (emit F64x2Abs $($rest:tt)*) => {};
469     (emit I8x16Neg $($rest:tt)*) => {};
470     (emit I16x8Neg $($rest:tt)*) => {};
471     (emit I32x4Neg $($rest:tt)*) => {};
472     (emit I64x2Neg $($rest:tt)*) => {};
473     (emit I8x16Shl $($rest:tt)*) => {};
474     (emit I16x8Shl $($rest:tt)*) => {};
475     (emit I32x4Shl $($rest:tt)*) => {};
476     (emit I64x2Shl $($rest:tt)*) => {};
477     (emit I8x16ShrU $($rest:tt)*) => {};
478     (emit I16x8ShrU $($rest:tt)*) => {};
479     (emit I32x4ShrU $($rest:tt)*) => {};
480     (emit I64x2ShrU $($rest:tt)*) => {};
481     (emit I8x16ShrS $($rest:tt)*) => {};
482     (emit I16x8ShrS $($rest:tt)*) => {};
483     (emit I32x4ShrS $($rest:tt)*) => {};
484     (emit I64x2ShrS $($rest:tt)*) => {};
485     (emit I16x8Q15MulrSatS $($rest:tt)*) => {};
486     (emit I8x16AllTrue $($rest:tt)*) => {};
487     (emit I16x8AllTrue $($rest:tt)*) => {};
488     (emit I32x4AllTrue $($rest:tt)*) => {};
489     (emit I64x2AllTrue $($rest:tt)*) => {};
490     (emit I8x16Bitmask $($rest:tt)*) => {};
491     (emit I16x8Bitmask $($rest:tt)*) => {};
492     (emit I32x4Bitmask $($rest:tt)*) => {};
493     (emit I64x2Bitmask $($rest:tt)*) => {};
494     (emit I32x4TruncSatF32x4S $($rest:tt)*) => {};
495     (emit I32x4TruncSatF32x4U $($rest:tt)*) => {};
496     (emit I32x4TruncSatF64x2SZero $($rest:tt)*) => {};
497     (emit I32x4TruncSatF64x2UZero $($rest:tt)*) => {};
498     (emit I8x16MinU $($rest:tt)*) => {};
499     (emit I16x8MinU $($rest:tt)*) => {};
500     (emit I32x4MinU $($rest:tt)*) => {};
501     (emit I8x16MinS $($rest:tt)*) => {};
502     (emit I16x8MinS $($rest:tt)*) => {};
503     (emit I32x4MinS $($rest:tt)*) => {};
504     (emit I8x16MaxU $($rest:tt)*) => {};
505     (emit I16x8MaxU $($rest:tt)*) => {};
506     (emit I32x4MaxU $($rest:tt)*) => {};
507     (emit I8x16MaxS $($rest:tt)*) => {};
508     (emit I16x8MaxS $($rest:tt)*) => {};
509     (emit I32x4MaxS $($rest:tt)*) => {};
510     (emit I16x8ExtMulLowI8x16S $($rest:tt)*) => {};
511     (emit I32x4ExtMulLowI16x8S $($rest:tt)*) => {};
512     (emit I64x2ExtMulLowI32x4S $($rest:tt)*) => {};
513     (emit I16x8ExtMulHighI8x16S $($rest:tt)*) => {};
514     (emit I32x4ExtMulHighI16x8S $($rest:tt)*) => {};
515     (emit I64x2ExtMulHighI32x4S $($rest:tt)*) => {};
516     (emit I16x8ExtMulLowI8x16U $($rest:tt)*) => {};
517     (emit I32x4ExtMulLowI16x8U $($rest:tt)*) => {};
518     (emit I64x2ExtMulLowI32x4U $($rest:tt)*) => {};
519     (emit I16x8ExtMulHighI8x16U $($rest:tt)*) => {};
520     (emit I32x4ExtMulHighI16x8U $($rest:tt)*) => {};
521     (emit I64x2ExtMulHighI32x4U $($rest:tt)*) => {};
522     (emit I16x8ExtAddPairwiseI8x16U $($rest:tt)*) => {};
523     (emit I16x8ExtAddPairwiseI8x16S $($rest:tt)*) => {};
524     (emit I32x4ExtAddPairwiseI16x8U $($rest:tt)*) => {};
525     (emit I32x4ExtAddPairwiseI16x8S $($rest:tt)*) => {};
526     (emit I32x4DotI16x8S $($rest:tt)*) => {};
527     (emit I8x16Popcnt $($rest:tt)*) => {};
528     (emit I8x16AvgrU $($rest:tt)*) => {};
529     (emit I16x8AvgrU $($rest:tt)*) => {};
530     (emit F32x4Add $($rest:tt)*) => {};
531     (emit F64x2Add $($rest:tt)*) => {};
532     (emit F32x4Sub $($rest:tt)*) => {};
533     (emit F64x2Sub $($rest:tt)*) => {};
534     (emit F32x4Mul $($rest:tt)*) => {};
535     (emit F64x2Mul $($rest:tt)*) => {};
536     (emit F32x4Div $($rest:tt)*) => {};
537     (emit F64x2Div $($rest:tt)*) => {};
538     (emit F32x4Neg $($rest:tt)*) => {};
539     (emit F64x2Neg $($rest:tt)*) => {};
540     (emit F32x4Sqrt $($rest:tt)*) => {};
541     (emit F64x2Sqrt $($rest:tt)*) => {};
542     (emit F32x4Ceil $($rest:tt)*) => {};
543     (emit F64x2Ceil $($rest:tt)*) => {};
544     (emit F32x4Floor $($rest:tt)*) => {};
545     (emit F64x2Floor $($rest:tt)*) => {};
546     (emit F32x4Nearest $($rest:tt)*) => {};
547     (emit F64x2Nearest $($rest:tt)*) => {};
548     (emit F32x4Trunc $($rest:tt)*) => {};
549     (emit F64x2Trunc $($rest:tt)*) => {};
550     (emit V128Load32Zero $($rest:tt)*) => {};
551     (emit V128Load64Zero $($rest:tt)*) => {};
552     (emit F32x4PMin $($rest:tt)*) => {};
553     (emit F64x2PMin $($rest:tt)*) => {};
554     (emit F32x4PMax $($rest:tt)*) => {};
555     (emit F64x2PMax $($rest:tt)*) => {};
556     (emit F32x4Min $($rest:tt)*) => {};
557     (emit F64x2Min $($rest:tt)*) => {};
558     (emit F32x4Max $($rest:tt)*) => {};
559     (emit F64x2Max $($rest:tt)*) => {};
560 
561     (emit $unsupported:tt $($rest:tt)*) => {$($rest)*};
562 }
563 
564 impl<'a, 'translation, 'data, M> VisitOperator<'a> for CodeGen<'a, 'translation, 'data, M, Emission>
565 where
566     M: MacroAssembler,
567 {
568     type Output = Result<()>;
569 
570     fn visit_i32_const(&mut self, val: i32) -> Self::Output {
571         self.context.stack.push(Val::i32(val));
572 
573         Ok(())
574     }
575 
576     fn visit_i64_const(&mut self, val: i64) -> Self::Output {
577         self.context.stack.push(Val::i64(val));
578         Ok(())
579     }
580 
581     fn visit_f32_const(&mut self, val: Ieee32) -> Self::Output {
582         self.context.stack.push(Val::f32(val));
583         Ok(())
584     }
585 
586     fn visit_f64_const(&mut self, val: Ieee64) -> Self::Output {
587         self.context.stack.push(Val::f64(val));
588         Ok(())
589     }
590 
591     fn visit_f32_add(&mut self) -> Self::Output {
592         self.context.binop(
593             self.masm,
594             OperandSize::S32,
595             &mut |masm: &mut M, dst, src, size| {
596                 masm.float_add(writable!(dst), dst, src, size)?;
597                 Ok(TypedReg::f32(dst))
598             },
599         )
600     }
601 
602     fn visit_f64_add(&mut self) -> Self::Output {
603         self.context.binop(
604             self.masm,
605             OperandSize::S64,
606             &mut |masm: &mut M, dst, src, size| {
607                 masm.float_add(writable!(dst), dst, src, size)?;
608                 Ok(TypedReg::f64(dst))
609             },
610         )
611     }
612 
613     fn visit_f32_sub(&mut self) -> Self::Output {
614         self.context.binop(
615             self.masm,
616             OperandSize::S32,
617             &mut |masm: &mut M, dst, src, size| {
618                 masm.float_sub(writable!(dst), dst, src, size)?;
619                 Ok(TypedReg::f32(dst))
620             },
621         )
622     }
623 
624     fn visit_f64_sub(&mut self) -> Self::Output {
625         self.context.binop(
626             self.masm,
627             OperandSize::S64,
628             &mut |masm: &mut M, dst, src, size| {
629                 masm.float_sub(writable!(dst), dst, src, size)?;
630                 Ok(TypedReg::f64(dst))
631             },
632         )
633     }
634 
635     fn visit_f32_mul(&mut self) -> Self::Output {
636         self.context.binop(
637             self.masm,
638             OperandSize::S32,
639             &mut |masm: &mut M, dst, src, size| {
640                 masm.float_mul(writable!(dst), dst, src, size)?;
641                 Ok(TypedReg::f32(dst))
642             },
643         )
644     }
645 
646     fn visit_f64_mul(&mut self) -> Self::Output {
647         self.context.binop(
648             self.masm,
649             OperandSize::S64,
650             &mut |masm: &mut M, dst, src, size| {
651                 masm.float_mul(writable!(dst), dst, src, size)?;
652                 Ok(TypedReg::f64(dst))
653             },
654         )
655     }
656 
657     fn visit_f32_div(&mut self) -> Self::Output {
658         self.context.binop(
659             self.masm,
660             OperandSize::S32,
661             &mut |masm: &mut M, dst, src, size| {
662                 masm.float_div(writable!(dst), dst, src, size)?;
663                 Ok(TypedReg::f32(dst))
664             },
665         )
666     }
667 
668     fn visit_f64_div(&mut self) -> Self::Output {
669         self.context.binop(
670             self.masm,
671             OperandSize::S64,
672             &mut |masm: &mut M, dst, src, size| {
673                 masm.float_div(writable!(dst), dst, src, size)?;
674                 Ok(TypedReg::f64(dst))
675             },
676         )
677     }
678 
679     fn visit_f32_min(&mut self) -> Self::Output {
680         self.context.binop(
681             self.masm,
682             OperandSize::S32,
683             &mut |masm: &mut M, dst, src, size| {
684                 masm.float_min(writable!(dst), dst, src, size)?;
685                 Ok(TypedReg::f32(dst))
686             },
687         )
688     }
689 
690     fn visit_f64_min(&mut self) -> Self::Output {
691         self.context.binop(
692             self.masm,
693             OperandSize::S64,
694             &mut |masm: &mut M, dst, src, size| {
695                 masm.float_min(writable!(dst), dst, src, size)?;
696                 Ok(TypedReg::f64(dst))
697             },
698         )
699     }
700 
701     fn visit_f32_max(&mut self) -> Self::Output {
702         self.context.binop(
703             self.masm,
704             OperandSize::S32,
705             &mut |masm: &mut M, dst, src, size| {
706                 masm.float_max(writable!(dst), dst, src, size)?;
707                 Ok(TypedReg::f32(dst))
708             },
709         )
710     }
711 
712     fn visit_f64_max(&mut self) -> Self::Output {
713         self.context.binop(
714             self.masm,
715             OperandSize::S64,
716             &mut |masm: &mut M, dst, src, size| {
717                 masm.float_max(writable!(dst), dst, src, size)?;
718                 Ok(TypedReg::f64(dst))
719             },
720         )
721     }
722 
723     fn visit_f32_copysign(&mut self) -> Self::Output {
724         self.context.binop(
725             self.masm,
726             OperandSize::S32,
727             &mut |masm: &mut M, dst, src, size| {
728                 masm.float_copysign(writable!(dst), dst, src, size)?;
729                 Ok(TypedReg::f32(dst))
730             },
731         )
732     }
733 
734     fn visit_f64_copysign(&mut self) -> Self::Output {
735         self.context.binop(
736             self.masm,
737             OperandSize::S64,
738             &mut |masm: &mut M, dst, src, size| {
739                 masm.float_copysign(writable!(dst), dst, src, size)?;
740                 Ok(TypedReg::f64(dst))
741             },
742         )
743     }
744 
745     fn visit_f32_abs(&mut self) -> Self::Output {
746         self.context.unop(self.masm, |masm, reg| {
747             masm.float_abs(writable!(reg), OperandSize::S32)?;
748             Ok(TypedReg::f32(reg))
749         })
750     }
751 
752     fn visit_f64_abs(&mut self) -> Self::Output {
753         self.context.unop(self.masm, |masm, reg| {
754             masm.float_abs(writable!(reg), OperandSize::S64)?;
755             Ok(TypedReg::f64(reg))
756         })
757     }
758 
759     fn visit_f32_neg(&mut self) -> Self::Output {
760         self.context.unop(self.masm, |masm, reg| {
761             masm.float_neg(writable!(reg), OperandSize::S32)?;
762             Ok(TypedReg::f32(reg))
763         })
764     }
765 
766     fn visit_f64_neg(&mut self) -> Self::Output {
767         self.context.unop(self.masm, |masm, reg| {
768             masm.float_neg(writable!(reg), OperandSize::S64)?;
769             Ok(TypedReg::f64(reg))
770         })
771     }
772 
773     fn visit_f32_floor(&mut self) -> Self::Output {
774         self.masm.float_round(
775             RoundingMode::Down,
776             &mut self.env,
777             &mut self.context,
778             OperandSize::S32,
779             |env, cx, masm| {
780                 let builtin = env.builtins.floor_f32::<M::ABI>()?;
781                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
782             },
783         )
784     }
785 
786     fn visit_f64_floor(&mut self) -> Self::Output {
787         self.masm.float_round(
788             RoundingMode::Down,
789             &mut self.env,
790             &mut self.context,
791             OperandSize::S64,
792             |env, cx, masm| {
793                 let builtin = env.builtins.floor_f64::<M::ABI>()?;
794                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
795             },
796         )
797     }
798 
799     fn visit_f32_ceil(&mut self) -> Self::Output {
800         self.masm.float_round(
801             RoundingMode::Up,
802             &mut self.env,
803             &mut self.context,
804             OperandSize::S32,
805             |env, cx, masm| {
806                 let builtin = env.builtins.ceil_f32::<M::ABI>()?;
807                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
808             },
809         )
810     }
811 
812     fn visit_f64_ceil(&mut self) -> Self::Output {
813         self.masm.float_round(
814             RoundingMode::Up,
815             &mut self.env,
816             &mut self.context,
817             OperandSize::S64,
818             |env, cx, masm| {
819                 let builtin = env.builtins.ceil_f64::<M::ABI>()?;
820                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
821             },
822         )
823     }
824 
825     fn visit_f32_nearest(&mut self) -> Self::Output {
826         self.masm.float_round(
827             RoundingMode::Nearest,
828             &mut self.env,
829             &mut self.context,
830             OperandSize::S32,
831             |env, cx, masm| {
832                 let builtin = env.builtins.nearest_f32::<M::ABI>()?;
833                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
834             },
835         )
836     }
837 
838     fn visit_f64_nearest(&mut self) -> Self::Output {
839         self.masm.float_round(
840             RoundingMode::Nearest,
841             &mut self.env,
842             &mut self.context,
843             OperandSize::S64,
844             |env, cx, masm| {
845                 let builtin = env.builtins.nearest_f64::<M::ABI>()?;
846                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
847             },
848         )
849     }
850 
851     fn visit_f32_trunc(&mut self) -> Self::Output {
852         self.masm.float_round(
853             RoundingMode::Zero,
854             &mut self.env,
855             &mut self.context,
856             OperandSize::S32,
857             |env, cx, masm| {
858                 let builtin = env.builtins.trunc_f32::<M::ABI>()?;
859                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
860             },
861         )
862     }
863 
864     fn visit_f64_trunc(&mut self) -> Self::Output {
865         self.masm.float_round(
866             RoundingMode::Zero,
867             &mut self.env,
868             &mut self.context,
869             OperandSize::S64,
870             |env, cx, masm| {
871                 let builtin = env.builtins.trunc_f64::<M::ABI>()?;
872                 FnCall::emit::<M>(env, masm, cx, Callee::Builtin(builtin))
873             },
874         )
875     }
876 
877     fn visit_f32_sqrt(&mut self) -> Self::Output {
878         self.context.unop(self.masm, |masm, reg| {
879             masm.float_sqrt(writable!(reg), reg, OperandSize::S32)?;
880             Ok(TypedReg::f32(reg))
881         })
882     }
883 
884     fn visit_f64_sqrt(&mut self) -> Self::Output {
885         self.context.unop(self.masm, |masm, reg| {
886             masm.float_sqrt(writable!(reg), reg, OperandSize::S64)?;
887             Ok(TypedReg::f64(reg))
888         })
889     }
890 
891     fn visit_f32_eq(&mut self) -> Self::Output {
892         self.context.float_cmp_op(
893             self.masm,
894             OperandSize::S32,
895             &mut |masm: &mut M, dst, src1, src2, size| {
896                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Eq, size)
897             },
898         )
899     }
900 
901     fn visit_f64_eq(&mut self) -> Self::Output {
902         self.context.float_cmp_op(
903             self.masm,
904             OperandSize::S64,
905             &mut |masm: &mut M, dst, src1, src2, size| {
906                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Eq, size)
907             },
908         )
909     }
910 
911     fn visit_f32_ne(&mut self) -> Self::Output {
912         self.context.float_cmp_op(
913             self.masm,
914             OperandSize::S32,
915             &mut |masm: &mut M, dst, src1, src2, size| {
916                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Ne, size)
917             },
918         )
919     }
920 
921     fn visit_f64_ne(&mut self) -> Self::Output {
922         self.context.float_cmp_op(
923             self.masm,
924             OperandSize::S64,
925             &mut |masm: &mut M, dst, src1, src2, size| {
926                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Ne, size)
927             },
928         )
929     }
930 
931     fn visit_f32_lt(&mut self) -> Self::Output {
932         self.context.float_cmp_op(
933             self.masm,
934             OperandSize::S32,
935             &mut |masm: &mut M, dst, src1, src2, size| {
936                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Lt, size)
937             },
938         )
939     }
940 
941     fn visit_f64_lt(&mut self) -> Self::Output {
942         self.context.float_cmp_op(
943             self.masm,
944             OperandSize::S64,
945             &mut |masm: &mut M, dst, src1, src2, size| {
946                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Lt, size)
947             },
948         )
949     }
950 
951     fn visit_f32_gt(&mut self) -> Self::Output {
952         self.context.float_cmp_op(
953             self.masm,
954             OperandSize::S32,
955             &mut |masm: &mut M, dst, src1, src2, size| {
956                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Gt, size)
957             },
958         )
959     }
960 
961     fn visit_f64_gt(&mut self) -> Self::Output {
962         self.context.float_cmp_op(
963             self.masm,
964             OperandSize::S64,
965             &mut |masm: &mut M, dst, src1, src2, size| {
966                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Gt, size)
967             },
968         )
969     }
970 
971     fn visit_f32_le(&mut self) -> Self::Output {
972         self.context.float_cmp_op(
973             self.masm,
974             OperandSize::S32,
975             &mut |masm: &mut M, dst, src1, src2, size| {
976                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Le, size)
977             },
978         )
979     }
980 
981     fn visit_f64_le(&mut self) -> Self::Output {
982         self.context.float_cmp_op(
983             self.masm,
984             OperandSize::S64,
985             &mut |masm: &mut M, dst, src1, src2, size| {
986                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Le, size)
987             },
988         )
989     }
990 
991     fn visit_f32_ge(&mut self) -> Self::Output {
992         self.context.float_cmp_op(
993             self.masm,
994             OperandSize::S32,
995             &mut |masm: &mut M, dst, src1, src2, size| {
996                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Ge, size)
997             },
998         )
999     }
1000 
1001     fn visit_f64_ge(&mut self) -> Self::Output {
1002         self.context.float_cmp_op(
1003             self.masm,
1004             OperandSize::S64,
1005             &mut |masm: &mut M, dst, src1, src2, size| {
1006                 masm.float_cmp_with_set(writable!(dst), src1, src2, FloatCmpKind::Ge, size)
1007             },
1008         )
1009     }
1010 
1011     fn visit_f32_convert_i32_s(&mut self) -> Self::Output {
1012         self.context
1013             .convert_op(self.masm, WasmValType::F32, |masm, dst, src, dst_size| {
1014                 masm.signed_convert(writable!(dst), src, OperandSize::S32, dst_size)
1015             })
1016     }
1017 
1018     fn visit_f32_convert_i32_u(&mut self) -> Self::Output {
1019         self.context.convert_op_with_tmp_reg(
1020             self.masm,
1021             WasmValType::F32,
1022             RegClass::Int,
1023             |masm, dst, src, tmp_gpr, dst_size| {
1024                 masm.unsigned_convert(writable!(dst), src, tmp_gpr, OperandSize::S32, dst_size)
1025             },
1026         )
1027     }
1028 
1029     fn visit_f32_convert_i64_s(&mut self) -> Self::Output {
1030         self.context
1031             .convert_op(self.masm, WasmValType::F32, |masm, dst, src, dst_size| {
1032                 masm.signed_convert(writable!(dst), src, OperandSize::S64, dst_size)
1033             })
1034     }
1035 
1036     fn visit_f32_convert_i64_u(&mut self) -> Self::Output {
1037         self.context.convert_op_with_tmp_reg(
1038             self.masm,
1039             WasmValType::F32,
1040             RegClass::Int,
1041             |masm, dst, src, tmp_gpr, dst_size| {
1042                 masm.unsigned_convert(writable!(dst), src, tmp_gpr, OperandSize::S64, dst_size)
1043             },
1044         )
1045     }
1046 
1047     fn visit_f64_convert_i32_s(&mut self) -> Self::Output {
1048         self.context
1049             .convert_op(self.masm, WasmValType::F64, |masm, dst, src, dst_size| {
1050                 masm.signed_convert(writable!(dst), src, OperandSize::S32, dst_size)
1051             })
1052     }
1053 
1054     fn visit_f64_convert_i32_u(&mut self) -> Self::Output {
1055         self.context.convert_op_with_tmp_reg(
1056             self.masm,
1057             WasmValType::F64,
1058             RegClass::Int,
1059             |masm, dst, src, tmp_gpr, dst_size| {
1060                 masm.unsigned_convert(writable!(dst), src, tmp_gpr, OperandSize::S32, dst_size)
1061             },
1062         )
1063     }
1064 
1065     fn visit_f64_convert_i64_s(&mut self) -> Self::Output {
1066         self.context
1067             .convert_op(self.masm, WasmValType::F64, |masm, dst, src, dst_size| {
1068                 masm.signed_convert(writable!(dst), src, OperandSize::S64, dst_size)
1069             })
1070     }
1071 
1072     fn visit_f64_convert_i64_u(&mut self) -> Self::Output {
1073         self.context.convert_op_with_tmp_reg(
1074             self.masm,
1075             WasmValType::F64,
1076             RegClass::Int,
1077             |masm, dst, src, tmp_gpr, dst_size| {
1078                 masm.unsigned_convert(writable!(dst), src, tmp_gpr, OperandSize::S64, dst_size)
1079             },
1080         )
1081     }
1082 
1083     fn visit_f32_reinterpret_i32(&mut self) -> Self::Output {
1084         self.context
1085             .convert_op(self.masm, WasmValType::F32, |masm, dst, src, size| {
1086                 masm.reinterpret_int_as_float(writable!(dst), src, size)
1087             })
1088     }
1089 
1090     fn visit_f64_reinterpret_i64(&mut self) -> Self::Output {
1091         self.context
1092             .convert_op(self.masm, WasmValType::F64, |masm, dst, src, size| {
1093                 masm.reinterpret_int_as_float(writable!(dst), src, size)
1094             })
1095     }
1096 
1097     fn visit_f32_demote_f64(&mut self) -> Self::Output {
1098         self.context.unop(self.masm, |masm, reg| {
1099             masm.demote(writable!(reg), reg)?;
1100             Ok(TypedReg::f32(reg))
1101         })
1102     }
1103 
1104     fn visit_f64_promote_f32(&mut self) -> Self::Output {
1105         self.context.unop(self.masm, |masm, reg| {
1106             masm.promote(writable!(reg), reg)?;
1107             Ok(TypedReg::f64(reg))
1108         })
1109     }
1110 
1111     fn visit_i32_add(&mut self) -> Self::Output {
1112         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1113             masm.add(writable!(dst), dst, src, size)?;
1114             Ok(TypedReg::i32(dst))
1115         })
1116     }
1117 
1118     fn visit_i64_add(&mut self) -> Self::Output {
1119         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1120             masm.add(writable!(dst), dst, src, size)?;
1121             Ok(TypedReg::i64(dst))
1122         })
1123     }
1124 
1125     fn visit_i32_sub(&mut self) -> Self::Output {
1126         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1127             masm.sub(writable!(dst), dst, src, size)?;
1128             Ok(TypedReg::i32(dst))
1129         })
1130     }
1131 
1132     fn visit_i64_sub(&mut self) -> Self::Output {
1133         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1134             masm.sub(writable!(dst), dst, src, size)?;
1135             Ok(TypedReg::i64(dst))
1136         })
1137     }
1138 
1139     fn visit_i32_mul(&mut self) -> Self::Output {
1140         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1141             masm.mul(writable!(dst), dst, src, size)?;
1142             Ok(TypedReg::i32(dst))
1143         })
1144     }
1145 
1146     fn visit_i64_mul(&mut self) -> Self::Output {
1147         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1148             masm.mul(writable!(dst), dst, src, size)?;
1149             Ok(TypedReg::i64(dst))
1150         })
1151     }
1152 
1153     fn visit_i32_div_s(&mut self) -> Self::Output {
1154         use DivKind::*;
1155         use OperandSize::*;
1156 
1157         self.masm.div(&mut self.context, Signed, S32)
1158     }
1159 
1160     fn visit_i32_div_u(&mut self) -> Self::Output {
1161         use DivKind::*;
1162         use OperandSize::*;
1163 
1164         self.masm.div(&mut self.context, Unsigned, S32)
1165     }
1166 
1167     fn visit_i64_div_s(&mut self) -> Self::Output {
1168         use DivKind::*;
1169         use OperandSize::*;
1170 
1171         self.masm.div(&mut self.context, Signed, S64)
1172     }
1173 
1174     fn visit_i64_div_u(&mut self) -> Self::Output {
1175         use DivKind::*;
1176         use OperandSize::*;
1177 
1178         self.masm.div(&mut self.context, Unsigned, S64)
1179     }
1180 
1181     fn visit_i32_rem_s(&mut self) -> Self::Output {
1182         use OperandSize::*;
1183         use RemKind::*;
1184 
1185         self.masm.rem(&mut self.context, Signed, S32)
1186     }
1187 
1188     fn visit_i32_rem_u(&mut self) -> Self::Output {
1189         use OperandSize::*;
1190         use RemKind::*;
1191 
1192         self.masm.rem(&mut self.context, Unsigned, S32)
1193     }
1194 
1195     fn visit_i64_rem_s(&mut self) -> Self::Output {
1196         use OperandSize::*;
1197         use RemKind::*;
1198 
1199         self.masm.rem(&mut self.context, Signed, S64)
1200     }
1201 
1202     fn visit_i64_rem_u(&mut self) -> Self::Output {
1203         use OperandSize::*;
1204         use RemKind::*;
1205 
1206         self.masm.rem(&mut self.context, Unsigned, S64)
1207     }
1208 
1209     fn visit_i32_eq(&mut self) -> Self::Output {
1210         self.cmp_i32s(IntCmpKind::Eq)
1211     }
1212 
1213     fn visit_i64_eq(&mut self) -> Self::Output {
1214         self.cmp_i64s(IntCmpKind::Eq)
1215     }
1216 
1217     fn visit_i32_ne(&mut self) -> Self::Output {
1218         self.cmp_i32s(IntCmpKind::Ne)
1219     }
1220 
1221     fn visit_i64_ne(&mut self) -> Self::Output {
1222         self.cmp_i64s(IntCmpKind::Ne)
1223     }
1224 
1225     fn visit_i32_lt_s(&mut self) -> Self::Output {
1226         self.cmp_i32s(IntCmpKind::LtS)
1227     }
1228 
1229     fn visit_i64_lt_s(&mut self) -> Self::Output {
1230         self.cmp_i64s(IntCmpKind::LtS)
1231     }
1232 
1233     fn visit_i32_lt_u(&mut self) -> Self::Output {
1234         self.cmp_i32s(IntCmpKind::LtU)
1235     }
1236 
1237     fn visit_i64_lt_u(&mut self) -> Self::Output {
1238         self.cmp_i64s(IntCmpKind::LtU)
1239     }
1240 
1241     fn visit_i32_le_s(&mut self) -> Self::Output {
1242         self.cmp_i32s(IntCmpKind::LeS)
1243     }
1244 
1245     fn visit_i64_le_s(&mut self) -> Self::Output {
1246         self.cmp_i64s(IntCmpKind::LeS)
1247     }
1248 
1249     fn visit_i32_le_u(&mut self) -> Self::Output {
1250         self.cmp_i32s(IntCmpKind::LeU)
1251     }
1252 
1253     fn visit_i64_le_u(&mut self) -> Self::Output {
1254         self.cmp_i64s(IntCmpKind::LeU)
1255     }
1256 
1257     fn visit_i32_gt_s(&mut self) -> Self::Output {
1258         self.cmp_i32s(IntCmpKind::GtS)
1259     }
1260 
1261     fn visit_i64_gt_s(&mut self) -> Self::Output {
1262         self.cmp_i64s(IntCmpKind::GtS)
1263     }
1264 
1265     fn visit_i32_gt_u(&mut self) -> Self::Output {
1266         self.cmp_i32s(IntCmpKind::GtU)
1267     }
1268 
1269     fn visit_i64_gt_u(&mut self) -> Self::Output {
1270         self.cmp_i64s(IntCmpKind::GtU)
1271     }
1272 
1273     fn visit_i32_ge_s(&mut self) -> Self::Output {
1274         self.cmp_i32s(IntCmpKind::GeS)
1275     }
1276 
1277     fn visit_i64_ge_s(&mut self) -> Self::Output {
1278         self.cmp_i64s(IntCmpKind::GeS)
1279     }
1280 
1281     fn visit_i32_ge_u(&mut self) -> Self::Output {
1282         self.cmp_i32s(IntCmpKind::GeU)
1283     }
1284 
1285     fn visit_i64_ge_u(&mut self) -> Self::Output {
1286         self.cmp_i64s(IntCmpKind::GeU)
1287     }
1288 
1289     fn visit_i32_eqz(&mut self) -> Self::Output {
1290         use OperandSize::*;
1291 
1292         self.context.unop(self.masm, |masm, reg| {
1293             masm.cmp_with_set(writable!(reg), RegImm::i32(0), IntCmpKind::Eq, S32)?;
1294             Ok(TypedReg::i32(reg))
1295         })
1296     }
1297 
1298     fn visit_i64_eqz(&mut self) -> Self::Output {
1299         use OperandSize::*;
1300 
1301         self.context.unop(self.masm, |masm, reg| {
1302             masm.cmp_with_set(writable!(reg), RegImm::i64(0), IntCmpKind::Eq, S64)?;
1303             Ok(TypedReg::i32(reg)) // Return value for `i64.eqz` is an `i32`.
1304         })
1305     }
1306 
1307     fn visit_i32_clz(&mut self) -> Self::Output {
1308         use OperandSize::*;
1309 
1310         self.context.unop(self.masm, |masm, reg| {
1311             masm.clz(writable!(reg), reg, S32)?;
1312             Ok(TypedReg::i32(reg))
1313         })
1314     }
1315 
1316     fn visit_i64_clz(&mut self) -> Self::Output {
1317         use OperandSize::*;
1318 
1319         self.context.unop(self.masm, |masm, reg| {
1320             masm.clz(writable!(reg), reg, S64)?;
1321             Ok(TypedReg::i64(reg))
1322         })
1323     }
1324 
1325     fn visit_i32_ctz(&mut self) -> Self::Output {
1326         use OperandSize::*;
1327 
1328         self.context.unop(self.masm, |masm, reg| {
1329             masm.ctz(writable!(reg), reg, S32)?;
1330             Ok(TypedReg::i32(reg))
1331         })
1332     }
1333 
1334     fn visit_i64_ctz(&mut self) -> Self::Output {
1335         use OperandSize::*;
1336 
1337         self.context.unop(self.masm, |masm, reg| {
1338             masm.ctz(writable!(reg), reg, S64)?;
1339             Ok(TypedReg::i64(reg))
1340         })
1341     }
1342 
1343     fn visit_i32_and(&mut self) -> Self::Output {
1344         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1345             masm.and(writable!(dst), dst, src, size)?;
1346             Ok(TypedReg::i32(dst))
1347         })
1348     }
1349 
1350     fn visit_i64_and(&mut self) -> Self::Output {
1351         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1352             masm.and(writable!(dst), dst, src, size)?;
1353             Ok(TypedReg::i64(dst))
1354         })
1355     }
1356 
1357     fn visit_i32_or(&mut self) -> Self::Output {
1358         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1359             masm.or(writable!(dst), dst, src, size)?;
1360             Ok(TypedReg::i32(dst))
1361         })
1362     }
1363 
1364     fn visit_i64_or(&mut self) -> Self::Output {
1365         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1366             masm.or(writable!(dst), dst, src, size)?;
1367             Ok(TypedReg::i64(dst))
1368         })
1369     }
1370 
1371     fn visit_i32_xor(&mut self) -> Self::Output {
1372         self.context.i32_binop(self.masm, |masm, dst, src, size| {
1373             masm.xor(writable!(dst), dst, src, size)?;
1374             Ok(TypedReg::i32(dst))
1375         })
1376     }
1377 
1378     fn visit_i64_xor(&mut self) -> Self::Output {
1379         self.context.i64_binop(self.masm, |masm, dst, src, size| {
1380             masm.xor(writable!(dst), dst, src, size)?;
1381             Ok(TypedReg::i64(dst))
1382         })
1383     }
1384 
1385     fn visit_i32_shl(&mut self) -> Self::Output {
1386         use ShiftKind::*;
1387 
1388         self.context.i32_shift(self.masm, Shl)
1389     }
1390 
1391     fn visit_i64_shl(&mut self) -> Self::Output {
1392         use ShiftKind::*;
1393 
1394         self.context.i64_shift(self.masm, Shl)
1395     }
1396 
1397     fn visit_i32_shr_s(&mut self) -> Self::Output {
1398         use ShiftKind::*;
1399 
1400         self.context.i32_shift(self.masm, ShrS)
1401     }
1402 
1403     fn visit_i64_shr_s(&mut self) -> Self::Output {
1404         use ShiftKind::*;
1405 
1406         self.context.i64_shift(self.masm, ShrS)
1407     }
1408 
1409     fn visit_i32_shr_u(&mut self) -> Self::Output {
1410         use ShiftKind::*;
1411 
1412         self.context.i32_shift(self.masm, ShrU)
1413     }
1414 
1415     fn visit_i64_shr_u(&mut self) -> Self::Output {
1416         use ShiftKind::*;
1417 
1418         self.context.i64_shift(self.masm, ShrU)
1419     }
1420 
1421     fn visit_i32_rotl(&mut self) -> Self::Output {
1422         use ShiftKind::*;
1423 
1424         self.context.i32_shift(self.masm, Rotl)
1425     }
1426 
1427     fn visit_i64_rotl(&mut self) -> Self::Output {
1428         use ShiftKind::*;
1429 
1430         self.context.i64_shift(self.masm, Rotl)
1431     }
1432 
1433     fn visit_i32_rotr(&mut self) -> Self::Output {
1434         use ShiftKind::*;
1435 
1436         self.context.i32_shift(self.masm, Rotr)
1437     }
1438 
1439     fn visit_i64_rotr(&mut self) -> Self::Output {
1440         use ShiftKind::*;
1441 
1442         self.context.i64_shift(self.masm, Rotr)
1443     }
1444 
1445     fn visit_end(&mut self) -> Self::Output {
1446         if !self.context.reachable {
1447             self.handle_unreachable_end()
1448         } else {
1449             let mut control = self.pop_control_frame()?;
1450             control.emit_end(self.masm, &mut self.context)
1451         }
1452     }
1453 
1454     fn visit_i32_popcnt(&mut self) -> Self::Output {
1455         use OperandSize::*;
1456         self.masm.popcnt(&mut self.context, S32)
1457     }
1458 
1459     fn visit_i64_popcnt(&mut self) -> Self::Output {
1460         use OperandSize::*;
1461 
1462         self.masm.popcnt(&mut self.context, S64)
1463     }
1464 
1465     fn visit_i32_wrap_i64(&mut self) -> Self::Output {
1466         self.context.unop(self.masm, |masm, reg| {
1467             masm.wrap(writable!(reg), reg)?;
1468             Ok(TypedReg::i32(reg))
1469         })
1470     }
1471 
1472     fn visit_i64_extend_i32_s(&mut self) -> Self::Output {
1473         self.context.unop(self.masm, |masm, reg| {
1474             masm.extend(writable!(reg), reg, Extend::<Signed>::I64Extend32.into())?;
1475             Ok(TypedReg::i64(reg))
1476         })
1477     }
1478 
1479     fn visit_i64_extend_i32_u(&mut self) -> Self::Output {
1480         self.context.unop(self.masm, |masm, reg| {
1481             masm.extend(writable!(reg), reg, Extend::<Zero>::I64Extend32.into())?;
1482             Ok(TypedReg::i64(reg))
1483         })
1484     }
1485 
1486     fn visit_i32_extend8_s(&mut self) -> Self::Output {
1487         self.context.unop(self.masm, |masm, reg| {
1488             masm.extend(writable!(reg), reg, Extend::<Signed>::I32Extend8.into())?;
1489             Ok(TypedReg::i32(reg))
1490         })
1491     }
1492 
1493     fn visit_i32_extend16_s(&mut self) -> Self::Output {
1494         self.context.unop(self.masm, |masm, reg| {
1495             masm.extend(writable!(reg), reg, Extend::<Signed>::I32Extend16.into())?;
1496             Ok(TypedReg::i32(reg))
1497         })
1498     }
1499 
1500     fn visit_i64_extend8_s(&mut self) -> Self::Output {
1501         self.context.unop(self.masm, |masm, reg| {
1502             masm.extend(writable!(reg), reg, Extend::<Signed>::I64Extend8.into())?;
1503             Ok(TypedReg::i64(reg))
1504         })
1505     }
1506 
1507     fn visit_i64_extend16_s(&mut self) -> Self::Output {
1508         self.context.unop(self.masm, |masm, reg| {
1509             masm.extend(writable!(reg), reg, Extend::<Signed>::I64Extend16.into())?;
1510             Ok(TypedReg::i64(reg))
1511         })
1512     }
1513 
1514     fn visit_i64_extend32_s(&mut self) -> Self::Output {
1515         self.context.unop(self.masm, |masm, reg| {
1516             masm.extend(writable!(reg), reg, Extend::<Signed>::I64Extend32.into())?;
1517             Ok(TypedReg::i64(reg))
1518         })
1519     }
1520 
1521     fn visit_i32_trunc_f32_s(&mut self) -> Self::Output {
1522         use OperandSize::*;
1523 
1524         self.context
1525             .convert_op(self.masm, WasmValType::I32, |masm, dst, src, dst_size| {
1526                 masm.signed_truncate(writable!(dst), src, S32, dst_size, TruncKind::Unchecked)
1527             })
1528     }
1529 
1530     fn visit_i32_trunc_f32_u(&mut self) -> Self::Output {
1531         use OperandSize::*;
1532 
1533         self.masm
1534             .unsigned_truncate(&mut self.context, S32, S32, TruncKind::Unchecked)
1535     }
1536 
1537     fn visit_i32_trunc_f64_s(&mut self) -> Self::Output {
1538         use OperandSize::*;
1539 
1540         self.context
1541             .convert_op(self.masm, WasmValType::I32, |masm, dst, src, dst_size| {
1542                 masm.signed_truncate(writable!(dst), src, S64, dst_size, TruncKind::Unchecked)
1543             })
1544     }
1545 
1546     fn visit_i32_trunc_f64_u(&mut self) -> Self::Output {
1547         use OperandSize::*;
1548         self.masm
1549             .unsigned_truncate(&mut self.context, S64, S32, TruncKind::Unchecked)
1550     }
1551 
1552     fn visit_i64_trunc_f32_s(&mut self) -> Self::Output {
1553         use OperandSize::*;
1554 
1555         self.context
1556             .convert_op(self.masm, WasmValType::I64, |masm, dst, src, dst_size| {
1557                 masm.signed_truncate(writable!(dst), src, S32, dst_size, TruncKind::Unchecked)
1558             })
1559     }
1560 
1561     fn visit_i64_trunc_f32_u(&mut self) -> Self::Output {
1562         use OperandSize::*;
1563 
1564         self.masm
1565             .unsigned_truncate(&mut self.context, S32, S64, TruncKind::Unchecked)
1566     }
1567 
1568     fn visit_i64_trunc_f64_s(&mut self) -> Self::Output {
1569         use OperandSize::*;
1570 
1571         self.context
1572             .convert_op(self.masm, WasmValType::I64, |masm, dst, src, dst_size| {
1573                 masm.signed_truncate(writable!(dst), src, S64, dst_size, TruncKind::Unchecked)
1574             })
1575     }
1576 
1577     fn visit_i64_trunc_f64_u(&mut self) -> Self::Output {
1578         use OperandSize::*;
1579 
1580         self.masm
1581             .unsigned_truncate(&mut self.context, S64, S64, TruncKind::Unchecked)
1582     }
1583 
1584     fn visit_i32_reinterpret_f32(&mut self) -> Self::Output {
1585         self.context
1586             .convert_op(self.masm, WasmValType::I32, |masm, dst, src, size| {
1587                 masm.reinterpret_float_as_int(writable!(dst), src, size)
1588             })
1589     }
1590 
1591     fn visit_i64_reinterpret_f64(&mut self) -> Self::Output {
1592         self.context
1593             .convert_op(self.masm, WasmValType::I64, |masm, dst, src, size| {
1594                 masm.reinterpret_float_as_int(writable!(dst), src, size)
1595             })
1596     }
1597 
1598     fn visit_local_get(&mut self, index: u32) -> Self::Output {
1599         use WasmValType::*;
1600         let context = &mut self.context;
1601         let slot = context.frame.get_wasm_local(index);
1602         match slot.ty {
1603             I32 | I64 | F32 | F64 | V128 => context.stack.push(Val::local(index, slot.ty)),
1604             Ref(rt) => match rt.heap_type {
1605                 WasmHeapType::Func => context.stack.push(Val::local(index, slot.ty)),
1606                 _ => bail!(CodeGenError::unsupported_wasm_type()),
1607             },
1608         }
1609 
1610         Ok(())
1611     }
1612 
1613     fn visit_local_set(&mut self, index: u32) -> Self::Output {
1614         let src = self.emit_set_local(index)?;
1615         self.context.free_reg(src);
1616         Ok(())
1617     }
1618 
1619     fn visit_call(&mut self, index: u32) -> Self::Output {
1620         let callee = self.env.callee_from_index(FuncIndex::from_u32(index));
1621         FnCall::emit::<M>(&mut self.env, self.masm, &mut self.context, callee)?;
1622         Ok(())
1623     }
1624 
1625     fn visit_call_indirect(&mut self, type_index: u32, table_index: u32) -> Self::Output {
1626         // Spill now because `emit_lazy_init_funcref` and the `FnCall::emit`
1627         // invocations will both trigger spills since they both call functions.
1628         // However, the machine instructions for the spill emitted by
1629         // `emit_lazy_funcref` will be jumped over if the funcref was previously
1630         // initialized which may result in the machine stack becoming
1631         // unbalanced.
1632         self.context.spill(self.masm)?;
1633 
1634         let type_index = TypeIndex::from_u32(type_index);
1635         let table_index = TableIndex::from_u32(table_index);
1636 
1637         self.emit_lazy_init_funcref(table_index)?;
1638 
1639         // Perform the indirect call.
1640         // This code assumes that [`Self::emit_lazy_init_funcref`] will
1641         // push the funcref to the value stack.
1642         let funcref_ptr = self
1643             .context
1644             .stack
1645             .peek()
1646             .map(|v| v.unwrap_reg())
1647             .ok_or_else(|| CodeGenError::missing_values_in_stack())?;
1648         self.masm
1649             .trapz(funcref_ptr.into(), TRAP_INDIRECT_CALL_TO_NULL)?;
1650         self.emit_typecheck_funcref(funcref_ptr.into(), type_index)?;
1651 
1652         let callee = self.env.funcref(type_index);
1653         FnCall::emit::<M>(&mut self.env, self.masm, &mut self.context, callee)?;
1654         Ok(())
1655     }
1656 
1657     fn visit_table_init(&mut self, elem: u32, table: u32) -> Self::Output {
1658         let at = self.context.stack.ensure_index_at(3)?;
1659 
1660         self.context
1661             .stack
1662             .insert_many(at, &[table.try_into()?, elem.try_into()?]);
1663 
1664         let builtin = self.env.builtins.table_init::<M::ABI>()?;
1665         FnCall::emit::<M>(
1666             &mut self.env,
1667             self.masm,
1668             &mut self.context,
1669             Callee::Builtin(builtin.clone()),
1670         )?;
1671         self.context.pop_and_free(self.masm)
1672     }
1673 
1674     fn visit_table_copy(&mut self, dst: u32, src: u32) -> Self::Output {
1675         let at = self.context.stack.ensure_index_at(3)?;
1676         self.context
1677             .stack
1678             .insert_many(at, &[dst.try_into()?, src.try_into()?]);
1679 
1680         let builtin = self.env.builtins.table_copy::<M::ABI>()?;
1681         FnCall::emit::<M>(
1682             &mut self.env,
1683             self.masm,
1684             &mut self.context,
1685             Callee::Builtin(builtin),
1686         )?;
1687         self.context.pop_and_free(self.masm)
1688     }
1689 
1690     fn visit_table_get(&mut self, table: u32) -> Self::Output {
1691         let table_index = TableIndex::from_u32(table);
1692         let table = self.env.table(table_index);
1693         let heap_type = table.ref_type.heap_type;
1694 
1695         match heap_type {
1696             WasmHeapType::Func => self.emit_lazy_init_funcref(table_index),
1697             _ => Err(format_err!(CodeGenError::unsupported_wasm_type())),
1698         }
1699     }
1700 
1701     fn visit_table_grow(&mut self, table: u32) -> Self::Output {
1702         let table_index = TableIndex::from_u32(table);
1703         let table_ty = self.env.table(table_index);
1704         let builtin = match table_ty.ref_type.heap_type {
1705             WasmHeapType::Func => self.env.builtins.table_grow_func_ref::<M::ABI>()?,
1706             _ => bail!(CodeGenError::unsupported_wasm_type()),
1707         };
1708 
1709         let len = self.context.stack.len();
1710         // table.grow` requires at least 2 elements on the value stack.
1711         let at = self.context.stack.ensure_index_at(2)?;
1712 
1713         // The table_grow builtin expects the parameters in a different
1714         // order.
1715         // The value stack at this point should contain:
1716         // [ init_value | delta ] (stack top)
1717         // but the builtin function expects the init value as the last
1718         // argument.
1719         self.context.stack.inner_mut().swap(len - 1, len - 2);
1720 
1721         let builtin = self.prepare_builtin_defined_table_arg(table_index, at, builtin)?;
1722 
1723         FnCall::emit::<M>(&mut self.env, self.masm, &mut self.context, builtin)?;
1724 
1725         Ok(())
1726     }
1727 
1728     fn visit_table_size(&mut self, table: u32) -> Self::Output {
1729         let table_index = TableIndex::from_u32(table);
1730         let table_data = self.env.resolve_table_data(table_index);
1731         self.emit_compute_table_size(&table_data)
1732     }
1733 
1734     fn visit_table_fill(&mut self, table: u32) -> Self::Output {
1735         let table_index = TableIndex::from_u32(table);
1736         let table_ty = self.env.table(table_index);
1737 
1738         ensure!(
1739             table_ty.ref_type.heap_type == WasmHeapType::Func,
1740             CodeGenError::unsupported_wasm_type()
1741         );
1742 
1743         let builtin = self.env.builtins.table_fill_func_ref::<M::ABI>()?;
1744 
1745         let at = self.context.stack.ensure_index_at(3)?;
1746 
1747         self.context.stack.insert_many(at, &[table.try_into()?]);
1748         FnCall::emit::<M>(
1749             &mut self.env,
1750             self.masm,
1751             &mut self.context,
1752             Callee::Builtin(builtin.clone()),
1753         )?;
1754         self.context.pop_and_free(self.masm)
1755     }
1756 
1757     fn visit_table_set(&mut self, table: u32) -> Self::Output {
1758         let ptr_type = self.env.ptr_type();
1759         let table_index = TableIndex::from_u32(table);
1760         let table_data = self.env.resolve_table_data(table_index);
1761         let table = self.env.table(table_index);
1762         match table.ref_type.heap_type {
1763             WasmHeapType::Func => {
1764                 ensure!(
1765                     self.tunables.table_lazy_init,
1766                     CodeGenError::unsupported_table_eager_init()
1767                 );
1768                 let value = self.context.pop_to_reg(self.masm, None)?;
1769                 let index = self.context.pop_to_reg(self.masm, None)?;
1770                 let base = self.context.any_gpr(self.masm)?;
1771                 let elem_addr =
1772                     self.emit_compute_table_elem_addr(index.into(), base, &table_data)?;
1773                 // Set the initialized bit.
1774                 self.masm.or(
1775                     writable!(value.into()),
1776                     value.into(),
1777                     RegImm::i64(FUNCREF_INIT_BIT as i64),
1778                     ptr_type.try_into()?,
1779                 )?;
1780 
1781                 self.masm.store_ptr(value.into(), elem_addr)?;
1782 
1783                 self.context.free_reg(value);
1784                 self.context.free_reg(index);
1785                 self.context.free_reg(base);
1786                 Ok(())
1787             }
1788             _ => Err(format_err!(CodeGenError::unsupported_wasm_type())),
1789         }
1790     }
1791 
1792     fn visit_elem_drop(&mut self, index: u32) -> Self::Output {
1793         let elem_drop = self.env.builtins.elem_drop::<M::ABI>()?;
1794         self.context.stack.extend([index.try_into()?]);
1795         FnCall::emit::<M>(
1796             &mut self.env,
1797             self.masm,
1798             &mut self.context,
1799             Callee::Builtin(elem_drop),
1800         )?;
1801         Ok(())
1802     }
1803 
1804     fn visit_memory_init(&mut self, data_index: u32, mem: u32) -> Self::Output {
1805         let at = self.context.stack.ensure_index_at(3)?;
1806         self.context
1807             .stack
1808             .insert_many(at, &[mem.try_into()?, data_index.try_into()?]);
1809         let builtin = self.env.builtins.memory_init::<M::ABI>()?;
1810         FnCall::emit::<M>(
1811             &mut self.env,
1812             self.masm,
1813             &mut self.context,
1814             Callee::Builtin(builtin),
1815         )?;
1816         self.context.pop_and_free(self.masm)
1817     }
1818 
1819     fn visit_memory_copy(&mut self, dst_mem: u32, src_mem: u32) -> Self::Output {
1820         // At this point, the stack is expected to contain:
1821         //     [ dst_offset, src_offset, len ]
1822         // The following code inserts the missing params, so that stack contains:
1823         //     [ vmctx, dst_mem, dst_offset, src_mem, src_offset, len ]
1824         // Which is the order expected by the builtin function.
1825         let _ = self.context.stack.ensure_index_at(3)?;
1826         let at = self.context.stack.ensure_index_at(2)?;
1827         self.context.stack.insert_many(at, &[src_mem.try_into()?]);
1828 
1829         // One element was inserted above, so instead of 3, we use 4.
1830         let at = self.context.stack.ensure_index_at(4)?;
1831         self.context.stack.insert_many(at, &[dst_mem.try_into()?]);
1832 
1833         let builtin = self.env.builtins.memory_copy::<M::ABI>()?;
1834 
1835         FnCall::emit::<M>(
1836             &mut self.env,
1837             self.masm,
1838             &mut self.context,
1839             Callee::Builtin(builtin),
1840         )?;
1841         self.context.pop_and_free(self.masm)
1842     }
1843 
1844     fn visit_memory_fill(&mut self, mem: u32) -> Self::Output {
1845         let at = self.context.stack.ensure_index_at(3)?;
1846         let mem = MemoryIndex::from_u32(mem);
1847 
1848         let builtin = self.env.builtins.memory_fill::<M::ABI>()?;
1849         let builtin = self.prepare_builtin_defined_memory_arg(mem, at, builtin)?;
1850 
1851         FnCall::emit::<M>(&mut self.env, self.masm, &mut self.context, builtin)?;
1852         self.context.pop_and_free(self.masm)
1853     }
1854 
1855     fn visit_memory_size(&mut self, mem: u32) -> Self::Output {
1856         let heap = self.env.resolve_heap(MemoryIndex::from_u32(mem));
1857         self.emit_compute_memory_size(&heap)
1858     }
1859 
1860     fn visit_memory_grow(&mut self, mem: u32) -> Self::Output {
1861         let at = self.context.stack.ensure_index_at(1)?;
1862         let mem = MemoryIndex::from_u32(mem);
1863         // The stack at this point contains: [ delta ]
1864         // The desired state is
1865         //   [ vmctx, delta, index ]
1866         let builtin = self.env.builtins.memory_grow::<M::ABI>()?;
1867         let builtin = self.prepare_builtin_defined_memory_arg(mem, at + 1, builtin)?;
1868 
1869         let heap = self.env.resolve_heap(mem);
1870         FnCall::emit::<M>(&mut self.env, self.masm, &mut self.context, builtin)?;
1871 
1872         // The memory32_grow builtin returns a pointer type, therefore we must
1873         // ensure that the return type is representative of the address space of
1874         // the heap type.
1875         match (self.env.ptr_type(), heap.index_type()) {
1876             (WasmValType::I64, WasmValType::I64) => Ok(()),
1877             // When the heap type is smaller than the pointer type, we adjust
1878             // the result of the memory32_grow builtin.
1879             (WasmValType::I64, WasmValType::I32) => {
1880                 let top: Reg = self.context.pop_to_reg(self.masm, None)?.into();
1881                 self.masm.wrap(writable!(top), top)?;
1882                 self.context.stack.push(TypedReg::i32(top).into());
1883                 Ok(())
1884             }
1885             _ => Err(format_err!(CodeGenError::unsupported_32_bit_platform())),
1886         }
1887     }
1888 
1889     fn visit_data_drop(&mut self, data_index: u32) -> Self::Output {
1890         self.context.stack.extend([data_index.try_into()?]);
1891 
1892         let builtin = self.env.builtins.data_drop::<M::ABI>()?;
1893         FnCall::emit::<M>(
1894             &mut self.env,
1895             self.masm,
1896             &mut self.context,
1897             Callee::Builtin(builtin),
1898         )
1899     }
1900 
1901     fn visit_nop(&mut self) -> Self::Output {
1902         Ok(())
1903     }
1904 
1905     fn visit_if(&mut self, blockty: BlockType) -> Self::Output {
1906         self.control_frames.push(ControlStackFrame::r#if(
1907             self.env.resolve_block_sig(blockty)?,
1908             self.masm,
1909             &mut self.context,
1910         )?);
1911 
1912         Ok(())
1913     }
1914 
1915     fn visit_else(&mut self) -> Self::Output {
1916         if !self.context.reachable {
1917             self.handle_unreachable_else()
1918         } else {
1919             let control = self
1920                 .control_frames
1921                 .last_mut()
1922                 .ok_or_else(|| CodeGenError::control_frame_expected())?;
1923             control.emit_else(self.masm, &mut self.context)
1924         }
1925     }
1926 
1927     fn visit_block(&mut self, blockty: BlockType) -> Self::Output {
1928         self.control_frames.push(ControlStackFrame::block(
1929             self.env.resolve_block_sig(blockty)?,
1930             self.masm,
1931             &mut self.context,
1932         )?);
1933 
1934         Ok(())
1935     }
1936 
1937     fn visit_loop(&mut self, blockty: BlockType) -> Self::Output {
1938         self.control_frames.push(ControlStackFrame::r#loop(
1939             self.env.resolve_block_sig(blockty)?,
1940             self.masm,
1941             &mut self.context,
1942         )?);
1943 
1944         self.maybe_emit_epoch_check()?;
1945         self.maybe_emit_fuel_check()
1946     }
1947 
1948     fn visit_br(&mut self, depth: u32) -> Self::Output {
1949         let index = control_index(depth, self.control_frames.len())?;
1950         let frame = &mut self.control_frames[index];
1951         self.context
1952             .br::<_, _, UnconditionalBranch>(frame, self.masm, |masm, cx, frame| {
1953                 frame.pop_abi_results::<M, _>(cx, masm, |results, _, _| {
1954                     Ok(results.ret_area().copied())
1955                 })
1956             })
1957     }
1958 
1959     fn visit_br_if(&mut self, depth: u32) -> Self::Output {
1960         let index = control_index(depth, self.control_frames.len())?;
1961         let frame = &mut self.control_frames[index];
1962         frame.set_as_target();
1963 
1964         let top = {
1965             let top = self.context.without::<Result<TypedReg>, M, _>(
1966                 frame.results::<M>()?.regs(),
1967                 self.masm,
1968                 |ctx, masm| ctx.pop_to_reg(masm, None),
1969             )??;
1970             // Explicitly save any live registers and locals before setting up
1971             // the branch state.
1972             // In some cases, calculating the `top` value above, will result in
1973             // a spill, thus the following one will result in a no-op.
1974             self.context.spill(self.masm)?;
1975             frame.top_abi_results::<M, _>(
1976                 &mut self.context,
1977                 self.masm,
1978                 |results, context, masm| {
1979                     // In the case of `br_if` there's a possibility that we'll
1980                     // exit early from the block or fallthrough, for
1981                     // a fallthrough, we cannot rely on the pre-computed return area;
1982                     // it must be recalculated so that any values that are
1983                     // generated are correctly placed near the current stack
1984                     // pointer.
1985                     if results.on_stack() {
1986                         let stack_consumed = context.stack.sizeof(results.stack_operands_len());
1987                         let base = masm.sp_offset()?.as_u32() - stack_consumed;
1988                         let offs = base + results.size();
1989                         Ok(Some(RetArea::sp(SPOffset::from_u32(offs))))
1990                     } else {
1991                         Ok(None)
1992                     }
1993                 },
1994             )?;
1995             top
1996         };
1997 
1998         // Emit instructions to balance the machine stack.
1999         let current_sp_offset = self.masm.sp_offset()?;
2000         let unbalanced = frame.unbalanced(self.masm)?;
2001         let (label, cmp) = if unbalanced {
2002             (self.masm.get_label()?, IntCmpKind::Eq)
2003         } else {
2004             (*frame.label(), IntCmpKind::Ne)
2005         };
2006 
2007         self.masm
2008             .branch(cmp, top.reg, top.reg.into(), label, OperandSize::S32)?;
2009         self.context.free_reg(top);
2010 
2011         if unbalanced {
2012             self.context
2013                 .br::<_, _, ConditionalBranch>(frame, self.masm, |_, _, _| Ok(()))?;
2014 
2015             // Restore sp_offset to what it was for falling through and emit
2016             // fallthrough label.
2017             self.masm.reset_stack_pointer(current_sp_offset)?;
2018             self.masm.bind(label)?;
2019         }
2020 
2021         Ok(())
2022     }
2023 
2024     fn visit_br_table(&mut self, targets: BrTable<'a>) -> Self::Output {
2025         // +1 to account for the default target.
2026         let len = targets.len() + 1;
2027         // SmallVec<[_; 5]> to match the binary emission layer (e.g
2028         // see `JmpTableSeq'), but here we use 5 instead since we
2029         // bundle the default target as the last element in the array.
2030         let mut labels: SmallVec<[_; 5]> = smallvec![];
2031         for _ in 0..len {
2032             labels.push(self.masm.get_label()?);
2033         }
2034 
2035         // Find the innermost target and use it as the relative frame
2036         // for result handling below.
2037         //
2038         // This approach ensures that
2039         // 1. The stack pointer offset is correctly positioned
2040         //    according to the expectations of the innermost block end
2041         //    sequence.
2042         // 2. We meet the jump site invariants introduced by
2043         //    `CodegenContext::br`, which take advantage of Wasm
2044         //    semantics given that all jumps are "outward".
2045         let mut innermost = targets.default();
2046         for target in targets.targets() {
2047             let target = target?;
2048             if target < innermost {
2049                 innermost = target;
2050             }
2051         }
2052 
2053         let innermost_index = control_index(innermost, self.control_frames.len())?;
2054         let innermost_frame = &mut self.control_frames[innermost_index];
2055         let innermost_result = innermost_frame.results::<M>()?;
2056 
2057         let (index, tmp) = {
2058             let index_and_tmp = self.context.without::<Result<(TypedReg, _)>, M, _>(
2059                 innermost_result.regs(),
2060                 self.masm,
2061                 |cx, masm| Ok((cx.pop_to_reg(masm, None)?, cx.any_gpr(masm)?)),
2062             )??;
2063 
2064             // Materialize any constants or locals into their result
2065             // representation, so that when reachability is restored,
2066             // they are correctly located.  NB: the results are popped
2067             // in function of the innermost branch specified for
2068             // `br_table`, which implies that the machine stack will
2069             // be correctly balanced, by virtue of calling
2070             // `pop_abi_results`.
2071 
2072             // It's possible that we need to balance the stack for the
2073             // rest of the targets, which will be done before emitting
2074             // the unconditional jump below.
2075             innermost_frame.pop_abi_results::<M, _>(
2076                 &mut self.context,
2077                 self.masm,
2078                 |results, _, _| Ok(results.ret_area().copied()),
2079             )?;
2080             index_and_tmp
2081         };
2082 
2083         self.masm.jmp_table(&labels, index.into(), tmp)?;
2084         // Save the original stack pointer offset; we will reset the stack
2085         // pointer to this offset after jumping to each of the targets. Each
2086         // jump might adjust the stack according to the base offset of the
2087         // target.
2088         let current_sp = self.masm.sp_offset()?;
2089 
2090         for (t, l) in targets
2091             .targets()
2092             .chain(std::iter::once(Ok(targets.default())))
2093             .zip(labels.iter())
2094         {
2095             let control_index = control_index(t?, self.control_frames.len())?;
2096             let frame = &mut self.control_frames[control_index];
2097             // Reset the stack pointer to its original offset. This is needed
2098             // because each jump will potentially adjust the stack pointer
2099             // according to the base offset of the target.
2100             self.masm.reset_stack_pointer(current_sp)?;
2101 
2102             // NB: We don't perform any result handling as it was
2103             // already taken care of above before jumping to the
2104             // jump table.
2105             self.masm.bind(*l)?;
2106             // Ensure that the stack pointer is correctly positioned before
2107             // jumping to the jump table code.
2108             self.context
2109                 .br::<_, _, UnconditionalBranch>(frame, self.masm, |_, _, _| Ok(()))?;
2110         }
2111         // Finally reset the stack pointer to the original location.
2112         // The reachability analysis, will ensure it's correctly located
2113         // once reachability is restored.
2114         self.masm.reset_stack_pointer(current_sp)?;
2115         self.context.reachable = false;
2116         self.context.free_reg(index.reg);
2117         self.context.free_reg(tmp);
2118 
2119         Ok(())
2120     }
2121 
2122     fn visit_return(&mut self) -> Self::Output {
2123         // Grab the outermost frame, which is the function's body
2124         // frame. We don't rely on [`codegen::control_index`] since
2125         // this frame is implicit and we know that it should exist at
2126         // index 0.
2127         let outermost = &mut self.control_frames[0];
2128         self.context
2129             .br::<_, _, UnconditionalBranch>(outermost, self.masm, |masm, cx, frame| {
2130                 frame.pop_abi_results::<M, _>(cx, masm, |results, _, _| {
2131                     Ok(results.ret_area().copied())
2132                 })
2133             })
2134     }
2135 
2136     fn visit_unreachable(&mut self) -> Self::Output {
2137         self.masm.unreachable()?;
2138         self.context.reachable = false;
2139         // Set the implicit outermost frame as target to perform the necessary
2140         // stack clean up.
2141         let outermost = &mut self.control_frames[0];
2142         outermost.set_as_target();
2143 
2144         Ok(())
2145     }
2146 
2147     fn visit_local_tee(&mut self, index: u32) -> Self::Output {
2148         let typed_reg = self.emit_set_local(index)?;
2149         self.context.stack.push(typed_reg.into());
2150 
2151         Ok(())
2152     }
2153 
2154     fn visit_global_get(&mut self, global_index: u32) -> Self::Output {
2155         let index = GlobalIndex::from_u32(global_index);
2156         let (ty, base, offset) = self.emit_get_global_addr(index)?;
2157         let addr = self.masm.address_at_reg(base, offset)?;
2158         let dst = self.context.reg_for_type(ty, self.masm)?;
2159         self.masm.load(addr, writable!(dst), ty.try_into()?)?;
2160         self.context.stack.push(Val::reg(dst, ty));
2161 
2162         self.context.free_reg(base);
2163 
2164         Ok(())
2165     }
2166 
2167     fn visit_global_set(&mut self, global_index: u32) -> Self::Output {
2168         let index = GlobalIndex::from_u32(global_index);
2169         let (ty, base, offset) = self.emit_get_global_addr(index)?;
2170         let addr = self.masm.address_at_reg(base, offset)?;
2171 
2172         let typed_reg = self.context.pop_to_reg(self.masm, None)?;
2173         self.masm
2174             .store(typed_reg.reg.into(), addr, ty.try_into()?)?;
2175         self.context.free_reg(typed_reg.reg);
2176         self.context.free_reg(base);
2177 
2178         Ok(())
2179     }
2180 
2181     fn visit_drop(&mut self) -> Self::Output {
2182         self.context.drop_last(1, |regalloc, val| match val {
2183             Val::Reg(tr) => Ok(regalloc.free(tr.reg)),
2184             Val::Memory(m) => self.masm.free_stack(m.slot.size),
2185             _ => Ok(()),
2186         })
2187     }
2188 
2189     fn visit_select(&mut self) -> Self::Output {
2190         let cond = self.context.pop_to_reg(self.masm, None)?;
2191         let val2 = self.context.pop_to_reg(self.masm, None)?;
2192         let val1 = self.context.pop_to_reg(self.masm, None)?;
2193         self.masm.cmp(cond.reg, RegImm::i32(0), OperandSize::S32)?;
2194         // Conditionally move val1 to val2 if the comparison is
2195         // not zero.
2196         self.masm.cmov(
2197             writable!(val2.into()),
2198             val1.into(),
2199             IntCmpKind::Ne,
2200             val1.ty.try_into()?,
2201         )?;
2202         self.context.stack.push(val2.into());
2203         self.context.free_reg(val1.reg);
2204         self.context.free_reg(cond);
2205 
2206         Ok(())
2207     }
2208 
2209     fn visit_i32_load(&mut self, memarg: MemArg) -> Self::Output {
2210         self.emit_wasm_load(
2211             &memarg,
2212             WasmValType::I32,
2213             LoadKind::Operand(OperandSize::S32),
2214         )
2215     }
2216 
2217     fn visit_i32_load8_s(&mut self, memarg: MemArg) -> Self::Output {
2218         self.emit_wasm_load(
2219             &memarg,
2220             WasmValType::I32,
2221             LoadKind::ScalarExtend(Extend::<Signed>::I32Extend8.into()),
2222         )
2223     }
2224 
2225     fn visit_i32_load8_u(&mut self, memarg: MemArg) -> Self::Output {
2226         self.emit_wasm_load(
2227             &memarg,
2228             WasmValType::I32,
2229             LoadKind::ScalarExtend(Extend::<Zero>::I32Extend8.into()),
2230         )
2231     }
2232 
2233     fn visit_i32_load16_s(&mut self, memarg: MemArg) -> Self::Output {
2234         self.emit_wasm_load(
2235             &memarg,
2236             WasmValType::I32,
2237             LoadKind::ScalarExtend(Extend::<Signed>::I32Extend16.into()),
2238         )
2239     }
2240 
2241     fn visit_i32_load16_u(&mut self, memarg: MemArg) -> Self::Output {
2242         self.emit_wasm_load(
2243             &memarg,
2244             WasmValType::I32,
2245             LoadKind::ScalarExtend(Extend::<Zero>::I32Extend16.into()),
2246         )
2247     }
2248 
2249     fn visit_i32_store(&mut self, memarg: MemArg) -> Self::Output {
2250         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S32))
2251     }
2252 
2253     fn visit_i32_store8(&mut self, memarg: MemArg) -> Self::Output {
2254         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S8))
2255     }
2256 
2257     fn visit_i32_store16(&mut self, memarg: MemArg) -> Self::Output {
2258         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S16))
2259     }
2260 
2261     fn visit_i64_load8_s(&mut self, memarg: MemArg) -> Self::Output {
2262         self.emit_wasm_load(
2263             &memarg,
2264             WasmValType::I64,
2265             LoadKind::ScalarExtend(Extend::<Signed>::I64Extend8.into()),
2266         )
2267     }
2268 
2269     fn visit_i64_load8_u(&mut self, memarg: MemArg) -> Self::Output {
2270         self.emit_wasm_load(
2271             &memarg,
2272             WasmValType::I64,
2273             LoadKind::ScalarExtend(Extend::<Zero>::I64Extend8.into()),
2274         )
2275     }
2276 
2277     fn visit_i64_load16_u(&mut self, memarg: MemArg) -> Self::Output {
2278         self.emit_wasm_load(
2279             &memarg,
2280             WasmValType::I64,
2281             LoadKind::ScalarExtend(Extend::<Zero>::I64Extend16.into()),
2282         )
2283     }
2284 
2285     fn visit_i64_load16_s(&mut self, memarg: MemArg) -> Self::Output {
2286         self.emit_wasm_load(
2287             &memarg,
2288             WasmValType::I64,
2289             LoadKind::ScalarExtend(Extend::<Signed>::I64Extend16.into()),
2290         )
2291     }
2292 
2293     fn visit_i64_load32_u(&mut self, memarg: MemArg) -> Self::Output {
2294         self.emit_wasm_load(
2295             &memarg,
2296             WasmValType::I64,
2297             LoadKind::ScalarExtend(Extend::<Zero>::I64Extend32.into()),
2298         )
2299     }
2300 
2301     fn visit_i64_load32_s(&mut self, memarg: MemArg) -> Self::Output {
2302         self.emit_wasm_load(
2303             &memarg,
2304             WasmValType::I64,
2305             LoadKind::ScalarExtend(Extend::<Signed>::I64Extend32.into()),
2306         )
2307     }
2308 
2309     fn visit_i64_load(&mut self, memarg: MemArg) -> Self::Output {
2310         self.emit_wasm_load(
2311             &memarg,
2312             WasmValType::I64,
2313             LoadKind::Operand(OperandSize::S64),
2314         )
2315     }
2316 
2317     fn visit_i64_store(&mut self, memarg: MemArg) -> Self::Output {
2318         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S64))
2319     }
2320 
2321     fn visit_i64_store8(&mut self, memarg: MemArg) -> Self::Output {
2322         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S8))
2323     }
2324 
2325     fn visit_i64_store16(&mut self, memarg: MemArg) -> Self::Output {
2326         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S16))
2327     }
2328 
2329     fn visit_i64_store32(&mut self, memarg: MemArg) -> Self::Output {
2330         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S32))
2331     }
2332 
2333     fn visit_f32_load(&mut self, memarg: MemArg) -> Self::Output {
2334         self.emit_wasm_load(
2335             &memarg,
2336             WasmValType::F32,
2337             LoadKind::Operand(OperandSize::S32),
2338         )
2339     }
2340 
2341     fn visit_f32_store(&mut self, memarg: MemArg) -> Self::Output {
2342         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S32))
2343     }
2344 
2345     fn visit_f64_load(&mut self, memarg: MemArg) -> Self::Output {
2346         self.emit_wasm_load(
2347             &memarg,
2348             WasmValType::F64,
2349             LoadKind::Operand(OperandSize::S64),
2350         )
2351     }
2352 
2353     fn visit_f64_store(&mut self, memarg: MemArg) -> Self::Output {
2354         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S64))
2355     }
2356 
2357     fn visit_i32_trunc_sat_f32_s(&mut self) -> Self::Output {
2358         use OperandSize::*;
2359 
2360         self.context
2361             .convert_op(self.masm, WasmValType::I32, |masm, dst, src, dst_size| {
2362                 masm.signed_truncate(writable!(dst), src, S32, dst_size, TruncKind::Checked)
2363             })
2364     }
2365 
2366     fn visit_i32_trunc_sat_f32_u(&mut self) -> Self::Output {
2367         use OperandSize::*;
2368 
2369         self.masm
2370             .unsigned_truncate(&mut self.context, S32, S32, TruncKind::Checked)
2371     }
2372 
2373     fn visit_i32_trunc_sat_f64_s(&mut self) -> Self::Output {
2374         use OperandSize::*;
2375 
2376         self.context
2377             .convert_op(self.masm, WasmValType::I32, |masm, dst, src, dst_size| {
2378                 masm.signed_truncate(writable!(dst), src, S64, dst_size, TruncKind::Checked)
2379             })
2380     }
2381 
2382     fn visit_i32_trunc_sat_f64_u(&mut self) -> Self::Output {
2383         use OperandSize::*;
2384 
2385         self.masm
2386             .unsigned_truncate(&mut self.context, S64, S32, TruncKind::Checked)
2387     }
2388 
2389     fn visit_i64_trunc_sat_f32_s(&mut self) -> Self::Output {
2390         use OperandSize::*;
2391 
2392         self.context
2393             .convert_op(self.masm, WasmValType::I64, |masm, dst, src, dst_size| {
2394                 masm.signed_truncate(writable!(dst), src, S32, dst_size, TruncKind::Checked)
2395             })
2396     }
2397 
2398     fn visit_i64_trunc_sat_f32_u(&mut self) -> Self::Output {
2399         use OperandSize::*;
2400 
2401         self.masm
2402             .unsigned_truncate(&mut self.context, S32, S64, TruncKind::Checked)
2403     }
2404 
2405     fn visit_i64_trunc_sat_f64_s(&mut self) -> Self::Output {
2406         use OperandSize::*;
2407 
2408         self.context
2409             .convert_op(self.masm, WasmValType::I64, |masm, dst, src, dst_size| {
2410                 masm.signed_truncate(writable!(dst), src, S64, dst_size, TruncKind::Checked)
2411             })
2412     }
2413 
2414     fn visit_i64_trunc_sat_f64_u(&mut self) -> Self::Output {
2415         use OperandSize::*;
2416 
2417         self.masm
2418             .unsigned_truncate(&mut self.context, S64, S64, TruncKind::Checked)
2419     }
2420 
2421     fn visit_i64_add128(&mut self) -> Self::Output {
2422         self.context
2423             .binop128(self.masm, |masm, lhs_lo, lhs_hi, rhs_lo, rhs_hi| {
2424                 masm.add128(
2425                     writable!(lhs_lo),
2426                     writable!(lhs_hi),
2427                     lhs_lo,
2428                     lhs_hi,
2429                     rhs_lo,
2430                     rhs_hi,
2431                 )?;
2432                 Ok((TypedReg::i64(lhs_lo), TypedReg::i64(lhs_hi)))
2433             })
2434     }
2435 
2436     fn visit_i64_sub128(&mut self) -> Self::Output {
2437         self.context
2438             .binop128(self.masm, |masm, lhs_lo, lhs_hi, rhs_lo, rhs_hi| {
2439                 masm.sub128(
2440                     writable!(lhs_lo),
2441                     writable!(lhs_hi),
2442                     lhs_lo,
2443                     lhs_hi,
2444                     rhs_lo,
2445                     rhs_hi,
2446                 )?;
2447                 Ok((TypedReg::i64(lhs_lo), TypedReg::i64(lhs_hi)))
2448             })
2449     }
2450 
2451     fn visit_i64_mul_wide_s(&mut self) -> Self::Output {
2452         self.masm.mul_wide(&mut self.context, MulWideKind::Signed)
2453     }
2454 
2455     fn visit_i64_mul_wide_u(&mut self) -> Self::Output {
2456         self.masm.mul_wide(&mut self.context, MulWideKind::Unsigned)
2457     }
2458 
2459     fn visit_i32_atomic_load8_u(&mut self, memarg: MemArg) -> Self::Output {
2460         self.emit_wasm_load(
2461             &memarg,
2462             WasmValType::I32,
2463             LoadKind::Atomic(OperandSize::S8, Some(Extend::<Zero>::I32Extend8.into())),
2464         )
2465     }
2466 
2467     fn visit_i32_atomic_load16_u(&mut self, memarg: MemArg) -> Self::Output {
2468         self.emit_wasm_load(
2469             &memarg,
2470             WasmValType::I32,
2471             LoadKind::Atomic(OperandSize::S16, Some(Extend::<Zero>::I32Extend16.into())),
2472         )
2473     }
2474 
2475     fn visit_i32_atomic_load(&mut self, memarg: MemArg) -> Self::Output {
2476         self.emit_wasm_load(
2477             &memarg,
2478             WasmValType::I32,
2479             LoadKind::Atomic(OperandSize::S32, None),
2480         )
2481     }
2482 
2483     fn visit_i64_atomic_load8_u(&mut self, memarg: MemArg) -> Self::Output {
2484         self.emit_wasm_load(
2485             &memarg,
2486             WasmValType::I64,
2487             LoadKind::Atomic(OperandSize::S8, Some(Extend::<Zero>::I64Extend8.into())),
2488         )
2489     }
2490 
2491     fn visit_i64_atomic_load16_u(&mut self, memarg: MemArg) -> Self::Output {
2492         self.emit_wasm_load(
2493             &memarg,
2494             WasmValType::I64,
2495             LoadKind::Atomic(OperandSize::S16, Some(Extend::<Zero>::I64Extend16.into())),
2496         )
2497     }
2498 
2499     fn visit_i64_atomic_load32_u(&mut self, memarg: MemArg) -> Self::Output {
2500         self.emit_wasm_load(
2501             &memarg,
2502             WasmValType::I64,
2503             LoadKind::Atomic(OperandSize::S32, Some(Extend::<Zero>::I64Extend32.into())),
2504         )
2505     }
2506 
2507     fn visit_i64_atomic_load(&mut self, memarg: MemArg) -> Self::Output {
2508         self.emit_wasm_load(
2509             &memarg,
2510             WasmValType::I64,
2511             LoadKind::Atomic(OperandSize::S64, None),
2512         )
2513     }
2514 
2515     fn visit_i32_atomic_store(&mut self, memarg: MemArg) -> Self::Output {
2516         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S32))
2517     }
2518 
2519     fn visit_i64_atomic_store(&mut self, memarg: MemArg) -> Self::Output {
2520         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S64))
2521     }
2522 
2523     fn visit_i32_atomic_store8(&mut self, memarg: MemArg) -> Self::Output {
2524         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S8))
2525     }
2526 
2527     fn visit_i32_atomic_store16(&mut self, memarg: MemArg) -> Self::Output {
2528         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S16))
2529     }
2530 
2531     fn visit_i64_atomic_store8(&mut self, memarg: MemArg) -> Self::Output {
2532         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S8))
2533     }
2534 
2535     fn visit_i64_atomic_store16(&mut self, memarg: MemArg) -> Self::Output {
2536         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S16))
2537     }
2538 
2539     fn visit_i64_atomic_store32(&mut self, memarg: MemArg) -> Self::Output {
2540         self.emit_wasm_store(&memarg, StoreKind::Atomic(OperandSize::S32))
2541     }
2542 
2543     fn visit_i32_atomic_rmw8_add_u(&mut self, arg: MemArg) -> Self::Output {
2544         self.emit_atomic_rmw(
2545             &arg,
2546             RmwOp::Add,
2547             OperandSize::S8,
2548             Some(Extend::<Zero>::I32Extend8),
2549         )
2550     }
2551 
2552     fn visit_i32_atomic_rmw16_add_u(&mut self, arg: MemArg) -> Self::Output {
2553         self.emit_atomic_rmw(
2554             &arg,
2555             RmwOp::Add,
2556             OperandSize::S16,
2557             Some(Extend::<Zero>::I32Extend16),
2558         )
2559     }
2560 
2561     fn visit_i32_atomic_rmw_add(&mut self, arg: MemArg) -> Self::Output {
2562         self.emit_atomic_rmw(&arg, RmwOp::Add, OperandSize::S32, None)
2563     }
2564 
2565     fn visit_i64_atomic_rmw8_add_u(&mut self, arg: MemArg) -> Self::Output {
2566         self.emit_atomic_rmw(
2567             &arg,
2568             RmwOp::Add,
2569             OperandSize::S8,
2570             Some(Extend::<Zero>::I64Extend8),
2571         )
2572     }
2573 
2574     fn visit_i64_atomic_rmw16_add_u(&mut self, arg: MemArg) -> Self::Output {
2575         self.emit_atomic_rmw(
2576             &arg,
2577             RmwOp::Add,
2578             OperandSize::S16,
2579             Some(Extend::<Zero>::I64Extend16),
2580         )
2581     }
2582 
2583     fn visit_i64_atomic_rmw32_add_u(&mut self, arg: MemArg) -> Self::Output {
2584         self.emit_atomic_rmw(
2585             &arg,
2586             RmwOp::Add,
2587             OperandSize::S32,
2588             Some(Extend::<Zero>::I64Extend32),
2589         )
2590     }
2591 
2592     fn visit_i64_atomic_rmw_add(&mut self, arg: MemArg) -> Self::Output {
2593         self.emit_atomic_rmw(&arg, RmwOp::Add, OperandSize::S64, None)
2594     }
2595 
2596     fn visit_i32_atomic_rmw8_sub_u(&mut self, arg: MemArg) -> Self::Output {
2597         self.emit_atomic_rmw(
2598             &arg,
2599             RmwOp::Sub,
2600             OperandSize::S8,
2601             Some(Extend::<Zero>::I32Extend8),
2602         )
2603     }
2604     fn visit_i32_atomic_rmw16_sub_u(&mut self, arg: MemArg) -> Self::Output {
2605         self.emit_atomic_rmw(
2606             &arg,
2607             RmwOp::Sub,
2608             OperandSize::S16,
2609             Some(Extend::<Zero>::I32Extend16),
2610         )
2611     }
2612 
2613     fn visit_i32_atomic_rmw_sub(&mut self, arg: MemArg) -> Self::Output {
2614         self.emit_atomic_rmw(&arg, RmwOp::Sub, OperandSize::S32, None)
2615     }
2616 
2617     fn visit_i64_atomic_rmw8_sub_u(&mut self, arg: MemArg) -> Self::Output {
2618         self.emit_atomic_rmw(
2619             &arg,
2620             RmwOp::Sub,
2621             OperandSize::S8,
2622             Some(Extend::<Zero>::I64Extend8),
2623         )
2624     }
2625 
2626     fn visit_i64_atomic_rmw16_sub_u(&mut self, arg: MemArg) -> Self::Output {
2627         self.emit_atomic_rmw(
2628             &arg,
2629             RmwOp::Sub,
2630             OperandSize::S16,
2631             Some(Extend::<Zero>::I64Extend16),
2632         )
2633     }
2634 
2635     fn visit_i64_atomic_rmw32_sub_u(&mut self, arg: MemArg) -> Self::Output {
2636         self.emit_atomic_rmw(
2637             &arg,
2638             RmwOp::Sub,
2639             OperandSize::S32,
2640             Some(Extend::<Zero>::I64Extend32),
2641         )
2642     }
2643 
2644     fn visit_i64_atomic_rmw_sub(&mut self, arg: MemArg) -> Self::Output {
2645         self.emit_atomic_rmw(&arg, RmwOp::Sub, OperandSize::S64, None)
2646     }
2647 
2648     fn visit_i32_atomic_rmw8_xchg_u(&mut self, arg: MemArg) -> Self::Output {
2649         self.emit_atomic_rmw(
2650             &arg,
2651             RmwOp::Xchg,
2652             OperandSize::S8,
2653             Some(Extend::<Zero>::I32Extend8),
2654         )
2655     }
2656 
2657     fn visit_i32_atomic_rmw16_xchg_u(&mut self, arg: MemArg) -> Self::Output {
2658         self.emit_atomic_rmw(
2659             &arg,
2660             RmwOp::Xchg,
2661             OperandSize::S16,
2662             Some(Extend::<Zero>::I32Extend16),
2663         )
2664     }
2665 
2666     fn visit_i32_atomic_rmw_xchg(&mut self, arg: MemArg) -> Self::Output {
2667         self.emit_atomic_rmw(&arg, RmwOp::Xchg, OperandSize::S32, None)
2668     }
2669 
2670     fn visit_i64_atomic_rmw8_xchg_u(&mut self, arg: MemArg) -> Self::Output {
2671         self.emit_atomic_rmw(
2672             &arg,
2673             RmwOp::Xchg,
2674             OperandSize::S8,
2675             Some(Extend::<Zero>::I64Extend8),
2676         )
2677     }
2678 
2679     fn visit_i64_atomic_rmw16_xchg_u(&mut self, arg: MemArg) -> Self::Output {
2680         self.emit_atomic_rmw(
2681             &arg,
2682             RmwOp::Xchg,
2683             OperandSize::S16,
2684             Some(Extend::<Zero>::I64Extend16),
2685         )
2686     }
2687 
2688     fn visit_i64_atomic_rmw32_xchg_u(&mut self, arg: MemArg) -> Self::Output {
2689         self.emit_atomic_rmw(
2690             &arg,
2691             RmwOp::Xchg,
2692             OperandSize::S32,
2693             Some(Extend::<Zero>::I64Extend32),
2694         )
2695     }
2696 
2697     fn visit_i64_atomic_rmw_xchg(&mut self, arg: MemArg) -> Self::Output {
2698         self.emit_atomic_rmw(&arg, RmwOp::Xchg, OperandSize::S64, None)
2699     }
2700 
2701     fn visit_i32_atomic_rmw8_and_u(&mut self, arg: MemArg) -> Self::Output {
2702         self.emit_atomic_rmw(
2703             &arg,
2704             RmwOp::And,
2705             OperandSize::S8,
2706             Some(Extend::<Zero>::I32Extend8),
2707         )
2708     }
2709 
2710     fn visit_i32_atomic_rmw16_and_u(&mut self, arg: MemArg) -> Self::Output {
2711         self.emit_atomic_rmw(
2712             &arg,
2713             RmwOp::And,
2714             OperandSize::S16,
2715             Some(Extend::<Zero>::I32Extend16),
2716         )
2717     }
2718 
2719     fn visit_i32_atomic_rmw_and(&mut self, arg: MemArg) -> Self::Output {
2720         self.emit_atomic_rmw(&arg, RmwOp::And, OperandSize::S32, None)
2721     }
2722 
2723     fn visit_i64_atomic_rmw8_and_u(&mut self, arg: MemArg) -> Self::Output {
2724         self.emit_atomic_rmw(
2725             &arg,
2726             RmwOp::And,
2727             OperandSize::S8,
2728             Some(Extend::<Zero>::I64Extend8),
2729         )
2730     }
2731 
2732     fn visit_i64_atomic_rmw16_and_u(&mut self, arg: MemArg) -> Self::Output {
2733         self.emit_atomic_rmw(
2734             &arg,
2735             RmwOp::And,
2736             OperandSize::S16,
2737             Some(Extend::<Zero>::I64Extend16),
2738         )
2739     }
2740 
2741     fn visit_i64_atomic_rmw32_and_u(&mut self, arg: MemArg) -> Self::Output {
2742         self.emit_atomic_rmw(
2743             &arg,
2744             RmwOp::And,
2745             OperandSize::S32,
2746             Some(Extend::<Zero>::I64Extend32),
2747         )
2748     }
2749 
2750     fn visit_i64_atomic_rmw_and(&mut self, arg: MemArg) -> Self::Output {
2751         self.emit_atomic_rmw(&arg, RmwOp::And, OperandSize::S64, None)
2752     }
2753 
2754     fn visit_i32_atomic_rmw8_or_u(&mut self, arg: MemArg) -> Self::Output {
2755         self.emit_atomic_rmw(
2756             &arg,
2757             RmwOp::Or,
2758             OperandSize::S8,
2759             Some(Extend::<Zero>::I32Extend8),
2760         )
2761     }
2762 
2763     fn visit_i32_atomic_rmw16_or_u(&mut self, arg: MemArg) -> Self::Output {
2764         self.emit_atomic_rmw(
2765             &arg,
2766             RmwOp::Or,
2767             OperandSize::S16,
2768             Some(Extend::<Zero>::I32Extend16),
2769         )
2770     }
2771 
2772     fn visit_i32_atomic_rmw_or(&mut self, arg: MemArg) -> Self::Output {
2773         self.emit_atomic_rmw(&arg, RmwOp::Or, OperandSize::S32, None)
2774     }
2775 
2776     fn visit_i64_atomic_rmw8_or_u(&mut self, arg: MemArg) -> Self::Output {
2777         self.emit_atomic_rmw(
2778             &arg,
2779             RmwOp::Or,
2780             OperandSize::S8,
2781             Some(Extend::<Zero>::I64Extend8),
2782         )
2783     }
2784 
2785     fn visit_i64_atomic_rmw16_or_u(&mut self, arg: MemArg) -> Self::Output {
2786         self.emit_atomic_rmw(
2787             &arg,
2788             RmwOp::Or,
2789             OperandSize::S16,
2790             Some(Extend::<Zero>::I64Extend16),
2791         )
2792     }
2793 
2794     fn visit_i64_atomic_rmw32_or_u(&mut self, arg: MemArg) -> Self::Output {
2795         self.emit_atomic_rmw(
2796             &arg,
2797             RmwOp::Or,
2798             OperandSize::S32,
2799             Some(Extend::<Zero>::I64Extend32),
2800         )
2801     }
2802 
2803     fn visit_i64_atomic_rmw_or(&mut self, arg: MemArg) -> Self::Output {
2804         self.emit_atomic_rmw(&arg, RmwOp::Or, OperandSize::S64, None)
2805     }
2806 
2807     fn visit_i32_atomic_rmw8_xor_u(&mut self, arg: MemArg) -> Self::Output {
2808         self.emit_atomic_rmw(
2809             &arg,
2810             RmwOp::Xor,
2811             OperandSize::S8,
2812             Some(Extend::<Zero>::I32Extend8),
2813         )
2814     }
2815 
2816     fn visit_i32_atomic_rmw16_xor_u(&mut self, arg: MemArg) -> Self::Output {
2817         self.emit_atomic_rmw(
2818             &arg,
2819             RmwOp::Xor,
2820             OperandSize::S16,
2821             Some(Extend::<Zero>::I32Extend16),
2822         )
2823     }
2824 
2825     fn visit_i32_atomic_rmw_xor(&mut self, arg: MemArg) -> Self::Output {
2826         self.emit_atomic_rmw(&arg, RmwOp::Xor, OperandSize::S32, None)
2827     }
2828 
2829     fn visit_i64_atomic_rmw8_xor_u(&mut self, arg: MemArg) -> Self::Output {
2830         self.emit_atomic_rmw(
2831             &arg,
2832             RmwOp::Xor,
2833             OperandSize::S8,
2834             Some(Extend::<Zero>::I64Extend8),
2835         )
2836     }
2837 
2838     fn visit_i64_atomic_rmw16_xor_u(&mut self, arg: MemArg) -> Self::Output {
2839         self.emit_atomic_rmw(
2840             &arg,
2841             RmwOp::Xor,
2842             OperandSize::S16,
2843             Some(Extend::<Zero>::I64Extend16),
2844         )
2845     }
2846 
2847     fn visit_i64_atomic_rmw32_xor_u(&mut self, arg: MemArg) -> Self::Output {
2848         self.emit_atomic_rmw(
2849             &arg,
2850             RmwOp::Xor,
2851             OperandSize::S32,
2852             Some(Extend::<Zero>::I64Extend32),
2853         )
2854     }
2855 
2856     fn visit_i64_atomic_rmw_xor(&mut self, arg: MemArg) -> Self::Output {
2857         self.emit_atomic_rmw(&arg, RmwOp::Xor, OperandSize::S64, None)
2858     }
2859 
2860     fn visit_i32_atomic_rmw8_cmpxchg_u(&mut self, arg: MemArg) -> Self::Output {
2861         self.emit_atomic_cmpxchg(&arg, OperandSize::S8, Some(Extend::I32Extend8))
2862     }
2863 
2864     fn visit_i32_atomic_rmw16_cmpxchg_u(&mut self, arg: MemArg) -> Self::Output {
2865         self.emit_atomic_cmpxchg(&arg, OperandSize::S16, Some(Extend::I32Extend16))
2866     }
2867 
2868     fn visit_i32_atomic_rmw_cmpxchg(&mut self, arg: MemArg) -> Self::Output {
2869         self.emit_atomic_cmpxchg(&arg, OperandSize::S32, None)
2870     }
2871 
2872     fn visit_i64_atomic_rmw8_cmpxchg_u(&mut self, arg: MemArg) -> Self::Output {
2873         self.emit_atomic_cmpxchg(&arg, OperandSize::S8, Some(Extend::I64Extend8))
2874     }
2875 
2876     fn visit_i64_atomic_rmw16_cmpxchg_u(&mut self, arg: MemArg) -> Self::Output {
2877         self.emit_atomic_cmpxchg(&arg, OperandSize::S16, Some(Extend::I64Extend16))
2878     }
2879 
2880     fn visit_i64_atomic_rmw32_cmpxchg_u(&mut self, arg: MemArg) -> Self::Output {
2881         self.emit_atomic_cmpxchg(&arg, OperandSize::S32, Some(Extend::I64Extend32))
2882     }
2883 
2884     fn visit_i64_atomic_rmw_cmpxchg(&mut self, arg: MemArg) -> Self::Output {
2885         self.emit_atomic_cmpxchg(&arg, OperandSize::S64, None)
2886     }
2887 
2888     fn visit_memory_atomic_wait32(&mut self, arg: MemArg) -> Self::Output {
2889         self.emit_atomic_wait(&arg, AtomicWaitKind::Wait32)
2890     }
2891 
2892     fn visit_memory_atomic_wait64(&mut self, arg: MemArg) -> Self::Output {
2893         self.emit_atomic_wait(&arg, AtomicWaitKind::Wait64)
2894     }
2895 
2896     fn visit_memory_atomic_notify(&mut self, arg: MemArg) -> Self::Output {
2897         self.emit_atomic_notify(&arg)
2898     }
2899 
2900     fn visit_atomic_fence(&mut self) -> Self::Output {
2901         self.masm.fence()
2902     }
2903 
2904     wasmparser::for_each_visit_operator!(def_unsupported);
2905 }
2906 
2907 impl<'a, 'translation, 'data, M> VisitSimdOperator<'a>
2908     for CodeGen<'a, 'translation, 'data, M, Emission>
2909 where
2910     M: MacroAssembler,
2911 {
2912     fn visit_v128_const(&mut self, val: V128) -> Self::Output {
2913         self.context.stack.push(Val::v128(val.i128()));
2914         Ok(())
2915     }
2916 
2917     fn visit_v128_load(&mut self, memarg: MemArg) -> Self::Output {
2918         self.emit_wasm_load(
2919             &memarg,
2920             WasmValType::V128,
2921             LoadKind::Operand(OperandSize::S128),
2922         )
2923     }
2924 
2925     fn visit_v128_store(&mut self, memarg: MemArg) -> Self::Output {
2926         self.emit_wasm_store(&memarg, StoreKind::Operand(OperandSize::S128))
2927     }
2928 
2929     fn visit_v128_load8x8_s(&mut self, memarg: MemArg) -> Self::Output {
2930         self.emit_wasm_load(
2931             &memarg,
2932             WasmValType::V128,
2933             LoadKind::VectorExtend(V128LoadExtendKind::E8x8S),
2934         )
2935     }
2936 
2937     fn visit_v128_load8x8_u(&mut self, memarg: MemArg) -> Self::Output {
2938         self.emit_wasm_load(
2939             &memarg,
2940             WasmValType::V128,
2941             LoadKind::VectorExtend(V128LoadExtendKind::E8x8U),
2942         )
2943     }
2944 
2945     fn visit_v128_load16x4_s(&mut self, memarg: MemArg) -> Self::Output {
2946         self.emit_wasm_load(
2947             &memarg,
2948             WasmValType::V128,
2949             LoadKind::VectorExtend(V128LoadExtendKind::E16x4S),
2950         )
2951     }
2952 
2953     fn visit_v128_load16x4_u(&mut self, memarg: MemArg) -> Self::Output {
2954         self.emit_wasm_load(
2955             &memarg,
2956             WasmValType::V128,
2957             LoadKind::VectorExtend(V128LoadExtendKind::E16x4U),
2958         )
2959     }
2960 
2961     fn visit_v128_load32x2_s(&mut self, memarg: MemArg) -> Self::Output {
2962         self.emit_wasm_load(
2963             &memarg,
2964             WasmValType::V128,
2965             LoadKind::VectorExtend(V128LoadExtendKind::E32x2S),
2966         )
2967     }
2968 
2969     fn visit_v128_load32x2_u(&mut self, memarg: MemArg) -> Self::Output {
2970         self.emit_wasm_load(
2971             &memarg,
2972             WasmValType::V128,
2973             LoadKind::VectorExtend(V128LoadExtendKind::E32x2U),
2974         )
2975     }
2976 
2977     fn visit_v128_load8_splat(&mut self, memarg: MemArg) -> Self::Output {
2978         self.emit_wasm_load(
2979             &memarg,
2980             WasmValType::V128,
2981             LoadKind::Splat(SplatLoadKind::S8),
2982         )
2983     }
2984 
2985     fn visit_v128_load16_splat(&mut self, memarg: MemArg) -> Self::Output {
2986         self.emit_wasm_load(
2987             &memarg,
2988             WasmValType::V128,
2989             LoadKind::Splat(SplatLoadKind::S16),
2990         )
2991     }
2992 
2993     fn visit_v128_load32_splat(&mut self, memarg: MemArg) -> Self::Output {
2994         self.emit_wasm_load(
2995             &memarg,
2996             WasmValType::V128,
2997             LoadKind::Splat(SplatLoadKind::S32),
2998         )
2999     }
3000 
3001     fn visit_v128_load64_splat(&mut self, memarg: MemArg) -> Self::Output {
3002         self.emit_wasm_load(
3003             &memarg,
3004             WasmValType::V128,
3005             LoadKind::Splat(SplatLoadKind::S64),
3006         )
3007     }
3008 
3009     fn visit_i8x16_splat(&mut self) -> Self::Output {
3010         self.masm.splat(&mut self.context, SplatKind::I8x16)
3011     }
3012 
3013     fn visit_i16x8_splat(&mut self) -> Self::Output {
3014         self.masm.splat(&mut self.context, SplatKind::I16x8)
3015     }
3016 
3017     fn visit_i32x4_splat(&mut self) -> Self::Output {
3018         self.masm.splat(&mut self.context, SplatKind::I32x4)
3019     }
3020 
3021     fn visit_i64x2_splat(&mut self) -> Self::Output {
3022         self.masm.splat(&mut self.context, SplatKind::I64x2)
3023     }
3024 
3025     fn visit_f32x4_splat(&mut self) -> Self::Output {
3026         self.masm.splat(&mut self.context, SplatKind::F32x4)
3027     }
3028 
3029     fn visit_f64x2_splat(&mut self) -> Self::Output {
3030         self.masm.splat(&mut self.context, SplatKind::F64x2)
3031     }
3032 
3033     fn visit_i8x16_shuffle(&mut self, lanes: [u8; 16]) -> Self::Output {
3034         let rhs = self.context.pop_to_reg(self.masm, None)?;
3035         let lhs = self.context.pop_to_reg(self.masm, None)?;
3036         self.masm
3037             .shuffle(writable!(lhs.into()), lhs.into(), rhs.into(), lanes)?;
3038         self.context.stack.push(TypedReg::v128(lhs.into()).into());
3039         self.context.free_reg(rhs);
3040         Ok(())
3041     }
3042 
3043     fn visit_i8x16_swizzle(&mut self) -> Self::Output {
3044         let rhs = self.context.pop_to_reg(self.masm, None)?;
3045         let lhs = self.context.pop_to_reg(self.masm, None)?;
3046         self.masm
3047             .swizzle(writable!(lhs.into()), lhs.into(), rhs.into())?;
3048         self.context.stack.push(TypedReg::v128(lhs.into()).into());
3049         self.context.free_reg(rhs);
3050         Ok(())
3051     }
3052 
3053     fn visit_i8x16_extract_lane_s(&mut self, lane: u8) -> Self::Output {
3054         self.context.extract_lane_op(
3055             self.masm,
3056             ExtractLaneKind::I8x16S,
3057             |masm, src, dst, kind| masm.extract_lane(src, dst, lane, kind),
3058         )
3059     }
3060 
3061     fn visit_i8x16_extract_lane_u(&mut self, lane: u8) -> Self::Output {
3062         self.context.extract_lane_op(
3063             self.masm,
3064             ExtractLaneKind::I8x16U,
3065             |masm, src, dst, kind| masm.extract_lane(src, dst, lane, kind),
3066         )
3067     }
3068 
3069     fn visit_i16x8_extract_lane_s(&mut self, lane: u8) -> Self::Output {
3070         self.context.extract_lane_op(
3071             self.masm,
3072             ExtractLaneKind::I16x8S,
3073             |masm, src, dst, kind| masm.extract_lane(src, dst, lane, kind),
3074         )
3075     }
3076 
3077     fn visit_i16x8_extract_lane_u(&mut self, lane: u8) -> Self::Output {
3078         self.context.extract_lane_op(
3079             self.masm,
3080             ExtractLaneKind::I16x8U,
3081             |masm, src, dst, kind| masm.extract_lane(src, dst, lane, kind),
3082         )
3083     }
3084 
3085     fn visit_i32x4_extract_lane(&mut self, lane: u8) -> Self::Output {
3086         self.context
3087             .extract_lane_op(self.masm, ExtractLaneKind::I32x4, |masm, src, dst, kind| {
3088                 masm.extract_lane(src, dst, lane, kind)
3089             })
3090     }
3091 
3092     fn visit_i64x2_extract_lane(&mut self, lane: u8) -> Self::Output {
3093         self.context
3094             .extract_lane_op(self.masm, ExtractLaneKind::I64x2, |masm, src, dst, kind| {
3095                 masm.extract_lane(src, dst, lane, kind)
3096             })
3097     }
3098 
3099     fn visit_f32x4_extract_lane(&mut self, lane: u8) -> Self::Output {
3100         self.context
3101             .extract_lane_op(self.masm, ExtractLaneKind::F32x4, |masm, src, dst, kind| {
3102                 masm.extract_lane(src, dst, lane, kind)
3103             })
3104     }
3105 
3106     fn visit_f64x2_extract_lane(&mut self, lane: u8) -> Self::Output {
3107         self.context
3108             .extract_lane_op(self.masm, ExtractLaneKind::F64x2, |masm, src, dst, kind| {
3109                 masm.extract_lane(src, dst, lane, kind)
3110             })
3111     }
3112 
3113     fn visit_i8x16_eq(&mut self) -> Self::Output {
3114         self.context
3115             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3116                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::I8x16)?;
3117                 Ok(TypedReg::v128(dst))
3118             })
3119     }
3120 
3121     fn visit_i16x8_eq(&mut self) -> Self::Output {
3122         self.context
3123             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3124                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::I16x8)?;
3125                 Ok(TypedReg::v128(dst))
3126             })
3127     }
3128 
3129     fn visit_i32x4_eq(&mut self) -> Self::Output {
3130         self.context
3131             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3132                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::I32x4)?;
3133                 Ok(TypedReg::v128(dst))
3134             })
3135     }
3136 
3137     fn visit_i64x2_eq(&mut self) -> Self::Output {
3138         self.context
3139             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3140                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::I64x2)?;
3141                 Ok(TypedReg::v128(dst))
3142             })
3143     }
3144 
3145     fn visit_f32x4_eq(&mut self) -> Self::Output {
3146         self.context
3147             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3148                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::F32x4)?;
3149                 Ok(TypedReg::v128(dst))
3150             })
3151     }
3152 
3153     fn visit_f64x2_eq(&mut self) -> Self::Output {
3154         self.context
3155             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3156                 masm.v128_eq(writable!(dst), dst, src, VectorEqualityKind::F64x2)?;
3157                 Ok(TypedReg::v128(dst))
3158             })
3159     }
3160 
3161     fn visit_i8x16_ne(&mut self) -> Self::Output {
3162         self.context
3163             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3164                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::I8x16)?;
3165                 Ok(TypedReg::v128(dst))
3166             })
3167     }
3168 
3169     fn visit_i16x8_ne(&mut self) -> Self::Output {
3170         self.context
3171             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3172                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::I16x8)?;
3173                 Ok(TypedReg::v128(dst))
3174             })
3175     }
3176 
3177     fn visit_i32x4_ne(&mut self) -> Self::Output {
3178         self.context
3179             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3180                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::I32x4)?;
3181                 Ok(TypedReg::v128(dst))
3182             })
3183     }
3184 
3185     fn visit_i64x2_ne(&mut self) -> Self::Output {
3186         self.context
3187             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3188                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::I64x2)?;
3189                 Ok(TypedReg::v128(dst))
3190             })
3191     }
3192 
3193     fn visit_f32x4_ne(&mut self) -> Self::Output {
3194         self.context
3195             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3196                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::F32x4)?;
3197                 Ok(TypedReg::v128(dst))
3198             })
3199     }
3200 
3201     fn visit_f64x2_ne(&mut self) -> Self::Output {
3202         self.context
3203             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3204                 masm.v128_ne(writable!(dst), dst, src, VectorEqualityKind::F64x2)?;
3205                 Ok(TypedReg::v128(dst))
3206             })
3207     }
3208 
3209     fn visit_i8x16_lt_s(&mut self) -> Self::Output {
3210         self.context
3211             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3212                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I8x16S)?;
3213                 Ok(TypedReg::v128(dst))
3214             })
3215     }
3216 
3217     fn visit_i8x16_lt_u(&mut self) -> Self::Output {
3218         self.context
3219             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3220                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I8x16U)?;
3221                 Ok(TypedReg::v128(dst))
3222             })
3223     }
3224 
3225     fn visit_i16x8_lt_s(&mut self) -> Self::Output {
3226         self.context
3227             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3228                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I16x8S)?;
3229                 Ok(TypedReg::v128(dst))
3230             })
3231     }
3232 
3233     fn visit_i16x8_lt_u(&mut self) -> Self::Output {
3234         self.context
3235             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3236                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I16x8U)?;
3237                 Ok(TypedReg::v128(dst))
3238             })
3239     }
3240 
3241     fn visit_i32x4_lt_s(&mut self) -> Self::Output {
3242         self.context
3243             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3244                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I32x4S)?;
3245                 Ok(TypedReg::v128(dst))
3246             })
3247     }
3248 
3249     fn visit_i32x4_lt_u(&mut self) -> Self::Output {
3250         self.context
3251             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3252                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I32x4U)?;
3253                 Ok(TypedReg::v128(dst))
3254             })
3255     }
3256 
3257     fn visit_i64x2_lt_s(&mut self) -> Self::Output {
3258         self.context
3259             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3260                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::I64x2S)?;
3261                 Ok(TypedReg::v128(dst))
3262             })
3263     }
3264 
3265     fn visit_f32x4_lt(&mut self) -> Self::Output {
3266         self.context
3267             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3268                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::F32x4)?;
3269                 Ok(TypedReg::v128(dst))
3270             })
3271     }
3272 
3273     fn visit_f64x2_lt(&mut self) -> Self::Output {
3274         self.context
3275             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3276                 masm.v128_lt(writable!(dst), dst, src, VectorCompareKind::F64x2)?;
3277                 Ok(TypedReg::v128(dst))
3278             })
3279     }
3280 
3281     fn visit_i8x16_le_s(&mut self) -> Self::Output {
3282         self.context
3283             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3284                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I8x16S)?;
3285                 Ok(TypedReg::v128(dst))
3286             })
3287     }
3288 
3289     fn visit_i8x16_le_u(&mut self) -> Self::Output {
3290         self.context
3291             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3292                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I8x16U)?;
3293                 Ok(TypedReg::v128(dst))
3294             })
3295     }
3296 
3297     fn visit_i16x8_le_s(&mut self) -> Self::Output {
3298         self.context
3299             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3300                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I16x8S)?;
3301                 Ok(TypedReg::v128(dst))
3302             })
3303     }
3304 
3305     fn visit_i16x8_le_u(&mut self) -> Self::Output {
3306         self.context
3307             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3308                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I16x8U)?;
3309                 Ok(TypedReg::v128(dst))
3310             })
3311     }
3312 
3313     fn visit_i32x4_le_s(&mut self) -> Self::Output {
3314         self.context
3315             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3316                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I32x4S)?;
3317                 Ok(TypedReg::v128(dst))
3318             })
3319     }
3320 
3321     fn visit_i32x4_le_u(&mut self) -> Self::Output {
3322         self.context
3323             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3324                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I32x4U)?;
3325                 Ok(TypedReg::v128(dst))
3326             })
3327     }
3328 
3329     fn visit_i64x2_le_s(&mut self) -> Self::Output {
3330         self.context
3331             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3332                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::I64x2S)?;
3333                 Ok(TypedReg::v128(dst))
3334             })
3335     }
3336 
3337     fn visit_f32x4_le(&mut self) -> Self::Output {
3338         self.context
3339             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3340                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::F32x4)?;
3341                 Ok(TypedReg::v128(dst))
3342             })
3343     }
3344 
3345     fn visit_f64x2_le(&mut self) -> Self::Output {
3346         self.context
3347             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3348                 masm.v128_le(writable!(dst), dst, src, VectorCompareKind::F64x2)?;
3349                 Ok(TypedReg::v128(dst))
3350             })
3351     }
3352 
3353     fn visit_i8x16_gt_s(&mut self) -> Self::Output {
3354         self.context
3355             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3356                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I8x16S)?;
3357                 Ok(TypedReg::v128(dst))
3358             })
3359     }
3360 
3361     fn visit_i8x16_gt_u(&mut self) -> Self::Output {
3362         self.context
3363             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3364                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I8x16U)?;
3365                 Ok(TypedReg::v128(dst))
3366             })
3367     }
3368 
3369     fn visit_i16x8_gt_s(&mut self) -> Self::Output {
3370         self.context
3371             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3372                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I16x8S)?;
3373                 Ok(TypedReg::v128(dst))
3374             })
3375     }
3376 
3377     fn visit_i16x8_gt_u(&mut self) -> Self::Output {
3378         self.context
3379             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3380                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I16x8U)?;
3381                 Ok(TypedReg::v128(dst))
3382             })
3383     }
3384 
3385     fn visit_i32x4_gt_s(&mut self) -> Self::Output {
3386         self.context
3387             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3388                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I32x4S)?;
3389                 Ok(TypedReg::v128(dst))
3390             })
3391     }
3392 
3393     fn visit_i32x4_gt_u(&mut self) -> Self::Output {
3394         self.context
3395             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3396                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I32x4U)?;
3397                 Ok(TypedReg::v128(dst))
3398             })
3399     }
3400 
3401     fn visit_i64x2_gt_s(&mut self) -> Self::Output {
3402         self.context
3403             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3404                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::I64x2S)?;
3405                 Ok(TypedReg::v128(dst))
3406             })
3407     }
3408 
3409     fn visit_f32x4_gt(&mut self) -> Self::Output {
3410         self.context
3411             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3412                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::F32x4)?;
3413                 Ok(TypedReg::v128(dst))
3414             })
3415     }
3416 
3417     fn visit_f64x2_gt(&mut self) -> Self::Output {
3418         self.context
3419             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3420                 masm.v128_gt(writable!(dst), dst, src, VectorCompareKind::F64x2)?;
3421                 Ok(TypedReg::v128(dst))
3422             })
3423     }
3424 
3425     fn visit_i8x16_ge_s(&mut self) -> Self::Output {
3426         self.context
3427             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3428                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I8x16S)?;
3429                 Ok(TypedReg::v128(dst))
3430             })
3431     }
3432 
3433     fn visit_i8x16_ge_u(&mut self) -> Self::Output {
3434         self.context
3435             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3436                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I8x16U)?;
3437                 Ok(TypedReg::v128(dst))
3438             })
3439     }
3440 
3441     fn visit_i16x8_ge_s(&mut self) -> Self::Output {
3442         self.context
3443             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3444                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I16x8S)?;
3445                 Ok(TypedReg::v128(dst))
3446             })
3447     }
3448 
3449     fn visit_i16x8_ge_u(&mut self) -> Self::Output {
3450         self.context
3451             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3452                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I16x8U)?;
3453                 Ok(TypedReg::v128(dst))
3454             })
3455     }
3456 
3457     fn visit_i32x4_ge_s(&mut self) -> Self::Output {
3458         self.context
3459             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3460                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I32x4S)?;
3461                 Ok(TypedReg::v128(dst))
3462             })
3463     }
3464 
3465     fn visit_i32x4_ge_u(&mut self) -> Self::Output {
3466         self.context
3467             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3468                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I32x4U)?;
3469                 Ok(TypedReg::v128(dst))
3470             })
3471     }
3472 
3473     fn visit_i64x2_ge_s(&mut self) -> Self::Output {
3474         self.context
3475             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3476                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::I64x2S)?;
3477                 Ok(TypedReg::v128(dst))
3478             })
3479     }
3480 
3481     fn visit_f32x4_ge(&mut self) -> Self::Output {
3482         self.context
3483             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3484                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::F32x4)?;
3485                 Ok(TypedReg::v128(dst))
3486             })
3487     }
3488 
3489     fn visit_f64x2_ge(&mut self) -> Self::Output {
3490         self.context
3491             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3492                 masm.v128_ge(writable!(dst), dst, src, VectorCompareKind::F64x2)?;
3493                 Ok(TypedReg::v128(dst))
3494             })
3495     }
3496 
3497     fn visit_i8x16_replace_lane(&mut self, lane: u8) -> Self::Output {
3498         self.context
3499             .replace_lane_op(self.masm, ReplaceLaneKind::I8x16, |masm, src, dst, kind| {
3500                 masm.replace_lane(src, dst, lane, kind)
3501             })
3502     }
3503 
3504     fn visit_i16x8_replace_lane(&mut self, lane: u8) -> Self::Output {
3505         self.context
3506             .replace_lane_op(self.masm, ReplaceLaneKind::I16x8, |masm, src, dst, kind| {
3507                 masm.replace_lane(src, dst, lane, kind)
3508             })
3509     }
3510 
3511     fn visit_i32x4_replace_lane(&mut self, lane: u8) -> Self::Output {
3512         self.context
3513             .replace_lane_op(self.masm, ReplaceLaneKind::I32x4, |masm, src, dst, kind| {
3514                 masm.replace_lane(src, dst, lane, kind)
3515             })
3516     }
3517 
3518     fn visit_i64x2_replace_lane(&mut self, lane: u8) -> Self::Output {
3519         self.context
3520             .replace_lane_op(self.masm, ReplaceLaneKind::I64x2, |masm, src, dst, kind| {
3521                 masm.replace_lane(src, dst, lane, kind)
3522             })
3523     }
3524 
3525     fn visit_f32x4_replace_lane(&mut self, lane: u8) -> Self::Output {
3526         self.context
3527             .replace_lane_op(self.masm, ReplaceLaneKind::F32x4, |masm, src, dst, kind| {
3528                 masm.replace_lane(src, dst, lane, kind)
3529             })
3530     }
3531 
3532     fn visit_f64x2_replace_lane(&mut self, lane: u8) -> Self::Output {
3533         self.context
3534             .replace_lane_op(self.masm, ReplaceLaneKind::F64x2, |masm, src, dst, kind| {
3535                 masm.replace_lane(src, dst, lane, kind)
3536             })
3537     }
3538 
3539     fn visit_v128_not(&mut self) -> Self::Output {
3540         self.context.unop(self.masm, |masm, reg| {
3541             masm.v128_not(writable!(reg))?;
3542             Ok(TypedReg::new(WasmValType::V128, reg))
3543         })
3544     }
3545 
3546     fn visit_v128_and(&mut self) -> Self::Output {
3547         self.context
3548             .binop(self.masm, OperandSize::S128, |masm, dst, src, _size| {
3549                 masm.v128_and(dst, src, writable!(dst))?;
3550                 Ok(TypedReg::new(WasmValType::V128, dst))
3551             })
3552     }
3553 
3554     fn visit_v128_andnot(&mut self) -> Self::Output {
3555         self.context
3556             .binop(self.masm, OperandSize::S128, |masm, dst, src, _size| {
3557                 // careful here: and_not is *not* commutative: dst = !src1 & src2
3558                 masm.v128_and_not(src, dst, writable!(dst))?;
3559                 Ok(TypedReg::new(WasmValType::V128, dst))
3560             })
3561     }
3562 
3563     fn visit_v128_or(&mut self) -> Self::Output {
3564         self.context
3565             .binop(self.masm, OperandSize::S128, |masm, dst, src, _size| {
3566                 // careful here: and_not is *not* commutative: dst = !src1 & src2
3567                 masm.v128_or(src, dst, writable!(dst))?;
3568                 Ok(TypedReg::new(WasmValType::V128, dst))
3569             })
3570     }
3571 
3572     fn visit_v128_xor(&mut self) -> Self::Output {
3573         self.context
3574             .binop(self.masm, OperandSize::S128, |masm, dst, src, _size| {
3575                 // careful here: and_not is *not* commutative: dst = !src1 & src2
3576                 masm.v128_xor(src, dst, writable!(dst))?;
3577                 Ok(TypedReg::new(WasmValType::V128, dst))
3578             })
3579     }
3580 
3581     fn visit_v128_bitselect(&mut self) -> Self::Output {
3582         let mask = self.context.pop_to_reg(self.masm, None)?;
3583         let op2 = self.context.pop_to_reg(self.masm, None)?;
3584         let op1 = self.context.pop_to_reg(self.masm, None)?;
3585         let dst = self.context.any_fpr(self.masm)?;
3586 
3587         // careful here: bitselect is *not* commutative.
3588         self.masm
3589             .v128_bitselect(op1.reg, op2.reg, mask.reg, writable!(dst))?;
3590 
3591         self.context
3592             .stack
3593             .push(TypedReg::new(WasmValType::V128, dst).into());
3594         self.context.free_reg(op1);
3595         self.context.free_reg(op2);
3596         self.context.free_reg(mask);
3597 
3598         Ok(())
3599     }
3600 
3601     fn visit_v128_any_true(&mut self) -> Self::Output {
3602         let src = self.context.pop_to_reg(self.masm, None)?;
3603         let dst = self.context.any_gpr(self.masm)?;
3604 
3605         self.masm.v128_any_true(src.reg, writable!(dst))?;
3606 
3607         self.context
3608             .stack
3609             .push(TypedReg::new(WasmValType::I32, dst).into());
3610         self.context.free_reg(src);
3611 
3612         Ok(())
3613     }
3614 
3615     fn visit_v128_load8_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3616         self.emit_wasm_load(
3617             &arg,
3618             WasmValType::V128,
3619             LoadKind::vector_lane(lane, OperandSize::S8),
3620         )
3621     }
3622 
3623     fn visit_v128_load16_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3624         self.emit_wasm_load(
3625             &arg,
3626             WasmValType::V128,
3627             LoadKind::vector_lane(lane, OperandSize::S16),
3628         )
3629     }
3630 
3631     fn visit_v128_load32_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3632         self.emit_wasm_load(
3633             &arg,
3634             WasmValType::V128,
3635             LoadKind::vector_lane(lane, OperandSize::S32),
3636         )
3637     }
3638 
3639     fn visit_v128_load64_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3640         self.emit_wasm_load(
3641             &arg,
3642             WasmValType::V128,
3643             LoadKind::vector_lane(lane, OperandSize::S64),
3644         )
3645     }
3646 
3647     fn visit_v128_store8_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3648         self.emit_wasm_store(&arg, StoreKind::vector_lane(lane, OperandSize::S8))
3649     }
3650 
3651     fn visit_v128_store16_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3652         self.emit_wasm_store(&arg, StoreKind::vector_lane(lane, OperandSize::S16))
3653     }
3654 
3655     fn visit_v128_store32_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3656         self.emit_wasm_store(&arg, StoreKind::vector_lane(lane, OperandSize::S32))
3657     }
3658 
3659     fn visit_v128_store64_lane(&mut self, arg: MemArg, lane: u8) -> Self::Output {
3660         self.emit_wasm_store(&arg, StoreKind::vector_lane(lane, OperandSize::S64))
3661     }
3662 
3663     fn visit_f32x4_convert_i32x4_s(&mut self) -> Self::Output {
3664         self.context.unop(self.masm, |masm, reg| {
3665             masm.v128_convert(reg, writable!(reg), V128ConvertKind::I32x4S)?;
3666             Ok(TypedReg::v128(reg))
3667         })
3668     }
3669 
3670     fn visit_f32x4_convert_i32x4_u(&mut self) -> Self::Output {
3671         self.context.unop(self.masm, |masm, reg| {
3672             masm.v128_convert(reg, writable!(reg), V128ConvertKind::I32x4U)?;
3673             Ok(TypedReg::v128(reg))
3674         })
3675     }
3676 
3677     fn visit_f64x2_convert_low_i32x4_s(&mut self) -> Self::Output {
3678         self.context.unop(self.masm, |masm, reg| {
3679             masm.v128_convert(reg, writable!(reg), V128ConvertKind::I32x4LowS)?;
3680             Ok(TypedReg::v128(reg))
3681         })
3682     }
3683 
3684     fn visit_f64x2_convert_low_i32x4_u(&mut self) -> Self::Output {
3685         self.context.unop(self.masm, |masm, reg| {
3686             masm.v128_convert(reg, writable!(reg), V128ConvertKind::I32x4LowU)?;
3687             Ok(TypedReg::v128(reg))
3688         })
3689     }
3690 
3691     fn visit_i8x16_narrow_i16x8_s(&mut self) -> Self::Output {
3692         self.context
3693             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3694                 masm.v128_narrow(dst, src, writable!(dst), V128NarrowKind::I16x8S)?;
3695                 Ok(TypedReg::v128(dst))
3696             })
3697     }
3698 
3699     fn visit_i8x16_narrow_i16x8_u(&mut self) -> Self::Output {
3700         self.context
3701             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3702                 masm.v128_narrow(dst, src, writable!(dst), V128NarrowKind::I16x8U)?;
3703                 Ok(TypedReg::v128(dst))
3704             })
3705     }
3706 
3707     fn visit_i16x8_narrow_i32x4_s(&mut self) -> Self::Output {
3708         self.context
3709             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3710                 masm.v128_narrow(dst, src, writable!(dst), V128NarrowKind::I32x4S)?;
3711                 Ok(TypedReg::v128(dst))
3712             })
3713     }
3714 
3715     fn visit_i16x8_narrow_i32x4_u(&mut self) -> Self::Output {
3716         self.context
3717             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3718                 masm.v128_narrow(dst, src, writable!(dst), V128NarrowKind::I32x4U)?;
3719                 Ok(TypedReg::v128(dst))
3720             })
3721     }
3722 
3723     fn visit_f32x4_demote_f64x2_zero(&mut self) -> Self::Output {
3724         self.context.unop(self.masm, |masm, reg| {
3725             masm.v128_demote(reg, writable!(reg))?;
3726             Ok(TypedReg::v128(reg))
3727         })
3728     }
3729 
3730     fn visit_f64x2_promote_low_f32x4(&mut self) -> Self::Output {
3731         self.context.unop(self.masm, |masm, reg| {
3732             masm.v128_promote(reg, writable!(reg))?;
3733             Ok(TypedReg::v128(reg))
3734         })
3735     }
3736 
3737     fn visit_i16x8_extend_low_i8x16_s(&mut self) -> Self::Output {
3738         self.context.unop(self.masm, |masm, reg| {
3739             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI8x16S)?;
3740             Ok(TypedReg::v128(reg))
3741         })
3742     }
3743 
3744     fn visit_i16x8_extend_high_i8x16_s(&mut self) -> Self::Output {
3745         self.context.unop(self.masm, |masm, reg| {
3746             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI8x16S)?;
3747             Ok(TypedReg::v128(reg))
3748         })
3749     }
3750 
3751     fn visit_i16x8_extend_low_i8x16_u(&mut self) -> Self::Output {
3752         self.context.unop(self.masm, |masm, reg| {
3753             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI8x16U)?;
3754             Ok(TypedReg::v128(reg))
3755         })
3756     }
3757 
3758     fn visit_i16x8_extend_high_i8x16_u(&mut self) -> Self::Output {
3759         self.context.unop(self.masm, |masm, reg| {
3760             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI8x16U)?;
3761             Ok(TypedReg::v128(reg))
3762         })
3763     }
3764 
3765     fn visit_i32x4_extend_low_i16x8_s(&mut self) -> Self::Output {
3766         self.context.unop(self.masm, |masm, reg| {
3767             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI16x8S)?;
3768             Ok(TypedReg::v128(reg))
3769         })
3770     }
3771 
3772     fn visit_i32x4_extend_high_i16x8_s(&mut self) -> Self::Output {
3773         self.context.unop(self.masm, |masm, reg| {
3774             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI16x8S)?;
3775             Ok(TypedReg::v128(reg))
3776         })
3777     }
3778 
3779     fn visit_i32x4_extend_low_i16x8_u(&mut self) -> Self::Output {
3780         self.context.unop(self.masm, |masm, reg| {
3781             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI16x8U)?;
3782             Ok(TypedReg::v128(reg))
3783         })
3784     }
3785 
3786     fn visit_i32x4_extend_high_i16x8_u(&mut self) -> Self::Output {
3787         self.context.unop(self.masm, |masm, reg| {
3788             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI16x8U)?;
3789             Ok(TypedReg::v128(reg))
3790         })
3791     }
3792 
3793     fn visit_i64x2_extend_low_i32x4_s(&mut self) -> Self::Output {
3794         self.context.unop(self.masm, |masm, reg| {
3795             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI32x4S)?;
3796             Ok(TypedReg::v128(reg))
3797         })
3798     }
3799 
3800     fn visit_i64x2_extend_high_i32x4_s(&mut self) -> Self::Output {
3801         self.context.unop(self.masm, |masm, reg| {
3802             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI32x4S)?;
3803             Ok(TypedReg::v128(reg))
3804         })
3805     }
3806 
3807     fn visit_i64x2_extend_low_i32x4_u(&mut self) -> Self::Output {
3808         self.context.unop(self.masm, |masm, reg| {
3809             masm.v128_extend(reg, writable!(reg), V128ExtendKind::LowI32x4U)?;
3810             Ok(TypedReg::v128(reg))
3811         })
3812     }
3813 
3814     fn visit_i64x2_extend_high_i32x4_u(&mut self) -> Self::Output {
3815         self.context.unop(self.masm, |masm, reg| {
3816             masm.v128_extend(reg, writable!(reg), V128ExtendKind::HighI32x4U)?;
3817             Ok(TypedReg::v128(reg))
3818         })
3819     }
3820 
3821     fn visit_i8x16_add(&mut self) -> Self::Output {
3822         self.context
3823             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3824                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I8x16)?;
3825                 Ok(TypedReg::new(WasmValType::V128, dst))
3826             })
3827     }
3828 
3829     fn visit_i16x8_add(&mut self) -> Self::Output {
3830         self.context
3831             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3832                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I16x8)?;
3833                 Ok(TypedReg::new(WasmValType::V128, dst))
3834             })
3835     }
3836 
3837     fn visit_i32x4_add(&mut self) -> Self::Output {
3838         self.context
3839             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3840                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I32x4)?;
3841                 Ok(TypedReg::new(WasmValType::V128, dst))
3842             })
3843     }
3844 
3845     fn visit_i64x2_add(&mut self) -> Self::Output {
3846         self.context
3847             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3848                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I64x2)?;
3849                 Ok(TypedReg::new(WasmValType::V128, dst))
3850             })
3851     }
3852 
3853     fn visit_i8x16_sub(&mut self) -> Self::Output {
3854         self.context
3855             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3856                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I8x16)?;
3857                 Ok(TypedReg::new(WasmValType::V128, dst))
3858             })
3859     }
3860 
3861     fn visit_i16x8_sub(&mut self) -> Self::Output {
3862         self.context
3863             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3864                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I16x8)?;
3865                 Ok(TypedReg::new(WasmValType::V128, dst))
3866             })
3867     }
3868 
3869     fn visit_i32x4_sub(&mut self) -> Self::Output {
3870         self.context
3871             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
3872                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I32x4)?;
3873                 Ok(TypedReg::new(WasmValType::V128, dst))
3874             })
3875     }
3876 
3877     fn visit_i64x2_sub(&mut self) -> Self::Output {
3878         self.context
3879             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
3880                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I64x2)?;
3881                 Ok(TypedReg::new(WasmValType::V128, dst))
3882             })
3883     }
3884 
3885     fn visit_i16x8_mul(&mut self) -> Self::Output {
3886         self.masm.v128_mul(&mut self.context, V128MulKind::I16x8)
3887     }
3888 
3889     fn visit_i32x4_mul(&mut self) -> Self::Output {
3890         self.masm.v128_mul(&mut self.context, V128MulKind::I32x4)
3891     }
3892 
3893     fn visit_i64x2_mul(&mut self) -> Self::Output {
3894         self.masm.v128_mul(&mut self.context, V128MulKind::I64x2)
3895     }
3896 
3897     fn visit_i8x16_add_sat_s(&mut self) -> Self::Output {
3898         self.context
3899             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3900                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I8x16SatS)?;
3901                 Ok(TypedReg::new(WasmValType::V128, dst))
3902             })
3903     }
3904 
3905     fn visit_i16x8_add_sat_s(&mut self) -> Self::Output {
3906         self.context
3907             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3908                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I16x8SatS)?;
3909                 Ok(TypedReg::new(WasmValType::V128, dst))
3910             })
3911     }
3912 
3913     fn visit_i8x16_add_sat_u(&mut self) -> Self::Output {
3914         self.context
3915             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3916                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I8x16SatU)?;
3917                 Ok(TypedReg::new(WasmValType::V128, dst))
3918             })
3919     }
3920 
3921     fn visit_i16x8_add_sat_u(&mut self) -> Self::Output {
3922         self.context
3923             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3924                 masm.v128_add(dst, src, writable!(dst), V128AddKind::I16x8SatU)?;
3925                 Ok(TypedReg::new(WasmValType::V128, dst))
3926             })
3927     }
3928 
3929     fn visit_i8x16_sub_sat_s(&mut self) -> Self::Output {
3930         self.context
3931             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3932                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I8x16SatS)?;
3933                 Ok(TypedReg::new(WasmValType::V128, dst))
3934             })
3935     }
3936 
3937     fn visit_i16x8_sub_sat_s(&mut self) -> Self::Output {
3938         self.context
3939             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3940                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I16x8SatS)?;
3941                 Ok(TypedReg::new(WasmValType::V128, dst))
3942             })
3943     }
3944 
3945     fn visit_i8x16_sub_sat_u(&mut self) -> Self::Output {
3946         self.context
3947             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
3948                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I8x16SatU)?;
3949                 Ok(TypedReg::new(WasmValType::V128, dst))
3950             })
3951     }
3952 
3953     fn visit_i16x8_sub_sat_u(&mut self) -> Self::Output {
3954         self.context
3955             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
3956                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::I16x8SatU)?;
3957                 Ok(TypedReg::new(WasmValType::V128, dst))
3958             })
3959     }
3960 
3961     fn visit_i8x16_abs(&mut self) -> Self::Output {
3962         self.context.unop(self.masm, |masm, reg| {
3963             masm.v128_abs(reg, writable!(reg), V128AbsKind::I8x16)?;
3964             Ok(TypedReg::new(WasmValType::V128, reg))
3965         })
3966     }
3967 
3968     fn visit_i16x8_abs(&mut self) -> Self::Output {
3969         self.context.unop(self.masm, |masm, reg| {
3970             masm.v128_abs(reg, writable!(reg), V128AbsKind::I16x8)?;
3971             Ok(TypedReg::new(WasmValType::V128, reg))
3972         })
3973     }
3974 
3975     fn visit_i32x4_abs(&mut self) -> Self::Output {
3976         self.context.unop(self.masm, |masm, reg| {
3977             masm.v128_abs(reg, writable!(reg), V128AbsKind::I32x4)?;
3978             Ok(TypedReg::new(WasmValType::V128, reg))
3979         })
3980     }
3981 
3982     fn visit_i64x2_abs(&mut self) -> Self::Output {
3983         self.context.unop(self.masm, |masm, reg| {
3984             masm.v128_abs(reg, writable!(reg), V128AbsKind::I64x2)?;
3985             Ok(TypedReg::new(WasmValType::V128, reg))
3986         })
3987     }
3988 
3989     fn visit_f32x4_abs(&mut self) -> Self::Output {
3990         self.context.unop(self.masm, |masm, reg| {
3991             masm.v128_abs(reg, writable!(reg), V128AbsKind::F32x4)?;
3992             Ok(TypedReg::new(WasmValType::V128, reg))
3993         })
3994     }
3995 
3996     fn visit_f64x2_abs(&mut self) -> Self::Output {
3997         self.context.unop(self.masm, |masm, reg| {
3998             masm.v128_abs(reg, writable!(reg), V128AbsKind::F64x2)?;
3999             Ok(TypedReg::new(WasmValType::V128, reg))
4000         })
4001     }
4002 
4003     fn visit_i8x16_neg(&mut self) -> Self::Output {
4004         self.context.unop(self.masm, |masm, op| {
4005             masm.v128_neg(writable!(op), V128NegKind::I8x16)?;
4006             Ok(TypedReg::new(WasmValType::V128, op))
4007         })
4008     }
4009 
4010     fn visit_i16x8_neg(&mut self) -> Self::Output {
4011         self.context.unop(self.masm, |masm, op| {
4012             masm.v128_neg(writable!(op), V128NegKind::I16x8)?;
4013             Ok(TypedReg::new(WasmValType::V128, op))
4014         })
4015     }
4016 
4017     fn visit_i32x4_neg(&mut self) -> Self::Output {
4018         self.context.unop(self.masm, |masm, op| {
4019             masm.v128_neg(writable!(op), V128NegKind::I32x4)?;
4020             Ok(TypedReg::new(WasmValType::V128, op))
4021         })
4022     }
4023 
4024     fn visit_i64x2_neg(&mut self) -> Self::Output {
4025         self.context.unop(self.masm, |masm, op| {
4026             masm.v128_neg(writable!(op), V128NegKind::I64x2)?;
4027             Ok(TypedReg::new(WasmValType::V128, op))
4028         })
4029     }
4030 
4031     fn visit_i8x16_shl(&mut self) -> Self::Output {
4032         self.masm
4033             .v128_shift(&mut self.context, OperandSize::S8, ShiftKind::Shl)
4034     }
4035 
4036     fn visit_i16x8_shl(&mut self) -> Self::Output {
4037         self.masm
4038             .v128_shift(&mut self.context, OperandSize::S16, ShiftKind::Shl)
4039     }
4040 
4041     fn visit_i32x4_shl(&mut self) -> Self::Output {
4042         self.masm
4043             .v128_shift(&mut self.context, OperandSize::S32, ShiftKind::Shl)
4044     }
4045 
4046     fn visit_i64x2_shl(&mut self) -> Self::Output {
4047         self.masm
4048             .v128_shift(&mut self.context, OperandSize::S64, ShiftKind::Shl)
4049     }
4050 
4051     fn visit_i8x16_shr_u(&mut self) -> Self::Output {
4052         self.masm
4053             .v128_shift(&mut self.context, OperandSize::S8, ShiftKind::ShrU)
4054     }
4055 
4056     fn visit_i16x8_shr_u(&mut self) -> Self::Output {
4057         self.masm
4058             .v128_shift(&mut self.context, OperandSize::S16, ShiftKind::ShrU)
4059     }
4060 
4061     fn visit_i32x4_shr_u(&mut self) -> Self::Output {
4062         self.masm
4063             .v128_shift(&mut self.context, OperandSize::S32, ShiftKind::ShrU)
4064     }
4065 
4066     fn visit_i64x2_shr_u(&mut self) -> Self::Output {
4067         self.masm
4068             .v128_shift(&mut self.context, OperandSize::S64, ShiftKind::ShrU)
4069     }
4070 
4071     fn visit_i8x16_shr_s(&mut self) -> Self::Output {
4072         self.masm
4073             .v128_shift(&mut self.context, OperandSize::S8, ShiftKind::ShrS)
4074     }
4075 
4076     fn visit_i16x8_shr_s(&mut self) -> Self::Output {
4077         self.masm
4078             .v128_shift(&mut self.context, OperandSize::S16, ShiftKind::ShrS)
4079     }
4080 
4081     fn visit_i32x4_shr_s(&mut self) -> Self::Output {
4082         self.masm
4083             .v128_shift(&mut self.context, OperandSize::S32, ShiftKind::ShrS)
4084     }
4085 
4086     fn visit_i64x2_shr_s(&mut self) -> Self::Output {
4087         self.masm
4088             .v128_shift(&mut self.context, OperandSize::S64, ShiftKind::ShrS)
4089     }
4090 
4091     fn visit_i16x8_q15mulr_sat_s(&mut self) -> Self::Output {
4092         self.context
4093             .binop(self.masm, OperandSize::S16, |masm, dst, src, size| {
4094                 masm.v128_q15mulr_sat_s(dst, src, writable!(dst), size)?;
4095                 Ok(TypedReg::v128(dst))
4096             })
4097     }
4098 
4099     fn visit_i8x16_min_s(&mut self) -> Self::Output {
4100         self.context
4101             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
4102                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I8x16S)?;
4103                 Ok(TypedReg::v128(dst))
4104             })
4105     }
4106 
4107     fn visit_i8x16_all_true(&mut self) -> Self::Output {
4108         self.context.v128_all_true_op(self.masm, |masm, src, dst| {
4109             masm.v128_all_true(src, writable!(dst), OperandSize::S8)
4110         })
4111     }
4112 
4113     fn visit_i16x8_all_true(&mut self) -> Self::Output {
4114         self.context.v128_all_true_op(self.masm, |masm, src, dst| {
4115             masm.v128_all_true(src, writable!(dst), OperandSize::S16)
4116         })
4117     }
4118 
4119     fn visit_i32x4_all_true(&mut self) -> Self::Output {
4120         self.context.v128_all_true_op(self.masm, |masm, src, dst| {
4121             masm.v128_all_true(src, writable!(dst), OperandSize::S32)
4122         })
4123     }
4124 
4125     fn visit_i64x2_all_true(&mut self) -> Self::Output {
4126         self.context.v128_all_true_op(self.masm, |masm, src, dst| {
4127             masm.v128_all_true(src, writable!(dst), OperandSize::S64)
4128         })
4129     }
4130 
4131     fn visit_i8x16_bitmask(&mut self) -> Self::Output {
4132         self.context.v128_bitmask_op(self.masm, |masm, src, dst| {
4133             masm.v128_bitmask(src, writable!(dst), OperandSize::S8)
4134         })
4135     }
4136 
4137     fn visit_i16x8_bitmask(&mut self) -> Self::Output {
4138         self.context.v128_bitmask_op(self.masm, |masm, src, dst| {
4139             masm.v128_bitmask(src, writable!(dst), OperandSize::S16)
4140         })
4141     }
4142 
4143     fn visit_i32x4_bitmask(&mut self) -> Self::Output {
4144         self.context.v128_bitmask_op(self.masm, |masm, src, dst| {
4145             masm.v128_bitmask(src, writable!(dst), OperandSize::S32)
4146         })
4147     }
4148 
4149     fn visit_i64x2_bitmask(&mut self) -> Self::Output {
4150         self.context.v128_bitmask_op(self.masm, |masm, src, dst| {
4151             masm.v128_bitmask(src, writable!(dst), OperandSize::S64)
4152         })
4153     }
4154 
4155     fn visit_i32x4_trunc_sat_f32x4_s(&mut self) -> Self::Output {
4156         self.masm
4157             .v128_trunc(&mut self.context, V128TruncKind::I32x4FromF32x4S)
4158     }
4159 
4160     fn visit_i32x4_trunc_sat_f32x4_u(&mut self) -> Self::Output {
4161         self.masm
4162             .v128_trunc(&mut self.context, V128TruncKind::I32x4FromF32x4U)
4163     }
4164 
4165     fn visit_i32x4_trunc_sat_f64x2_s_zero(&mut self) -> Self::Output {
4166         self.masm
4167             .v128_trunc(&mut self.context, V128TruncKind::I32x4FromF64x2SZero)
4168     }
4169 
4170     fn visit_i32x4_trunc_sat_f64x2_u_zero(&mut self) -> Self::Output {
4171         self.masm
4172             .v128_trunc(&mut self.context, V128TruncKind::I32x4FromF64x2UZero)
4173     }
4174 
4175     fn visit_i16x8_min_s(&mut self) -> Self::Output {
4176         self.context
4177             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
4178                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I16x8S)?;
4179                 Ok(TypedReg::v128(dst))
4180             })
4181     }
4182 
4183     fn visit_i32x4_dot_i16x8_s(&mut self) -> Self::Output {
4184         self.context
4185             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4186                 masm.v128_dot(dst, src, writable!(dst))?;
4187                 Ok(TypedReg::v128(dst))
4188             })
4189     }
4190 
4191     fn visit_i8x16_popcnt(&mut self) -> Self::Output {
4192         self.masm.v128_popcnt(&mut self.context)
4193     }
4194 
4195     fn visit_i8x16_avgr_u(&mut self) -> Self::Output {
4196         self.context
4197             .binop(self.masm, OperandSize::S8, |masm, dst, src, size| {
4198                 masm.v128_avgr(dst, src, writable!(dst), size)?;
4199                 Ok(TypedReg::v128(dst))
4200             })
4201     }
4202 
4203     fn visit_i32x4_min_s(&mut self) -> Self::Output {
4204         self.context
4205             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4206                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I32x4S)?;
4207                 Ok(TypedReg::v128(dst))
4208             })
4209     }
4210 
4211     fn visit_i8x16_min_u(&mut self) -> Self::Output {
4212         self.context
4213             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
4214                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I8x16U)?;
4215                 Ok(TypedReg::v128(dst))
4216             })
4217     }
4218 
4219     fn visit_i16x8_avgr_u(&mut self) -> Self::Output {
4220         self.context
4221             .binop(self.masm, OperandSize::S16, |masm, dst, src, size| {
4222                 masm.v128_avgr(dst, src, writable!(dst), size)?;
4223                 Ok(TypedReg::v128(dst))
4224             })
4225     }
4226 
4227     fn visit_i16x8_min_u(&mut self) -> Self::Output {
4228         self.context
4229             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
4230                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I16x8U)?;
4231                 Ok(TypedReg::v128(dst))
4232             })
4233     }
4234 
4235     fn visit_i32x4_min_u(&mut self) -> Self::Output {
4236         self.context
4237             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4238                 masm.v128_min(src, dst, writable!(dst), V128MinKind::I32x4U)?;
4239                 Ok(TypedReg::v128(dst))
4240             })
4241     }
4242 
4243     fn visit_i8x16_max_s(&mut self) -> Self::Output {
4244         self.context
4245             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
4246                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I8x16S)?;
4247                 Ok(TypedReg::v128(dst))
4248             })
4249     }
4250 
4251     fn visit_i16x8_max_s(&mut self) -> Self::Output {
4252         self.context
4253             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
4254                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I16x8S)?;
4255                 Ok(TypedReg::v128(dst))
4256             })
4257     }
4258 
4259     fn visit_i32x4_max_s(&mut self) -> Self::Output {
4260         self.context
4261             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4262                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I32x4S)?;
4263                 Ok(TypedReg::v128(dst))
4264             })
4265     }
4266 
4267     fn visit_i8x16_max_u(&mut self) -> Self::Output {
4268         self.context
4269             .binop(self.masm, OperandSize::S8, |masm, dst, src, _size| {
4270                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I8x16U)?;
4271                 Ok(TypedReg::v128(dst))
4272             })
4273     }
4274 
4275     fn visit_i16x8_max_u(&mut self) -> Self::Output {
4276         self.context
4277             .binop(self.masm, OperandSize::S16, |masm, dst, src, _size| {
4278                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I16x8U)?;
4279                 Ok(TypedReg::v128(dst))
4280             })
4281     }
4282 
4283     fn visit_i32x4_max_u(&mut self) -> Self::Output {
4284         self.context
4285             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4286                 masm.v128_max(src, dst, writable!(dst), V128MaxKind::I32x4U)?;
4287                 Ok(TypedReg::v128(dst))
4288             })
4289     }
4290 
4291     fn visit_i16x8_extmul_low_i8x16_s(&mut self) -> Self::Output {
4292         self.masm
4293             .v128_extmul(&mut self.context, V128ExtMulKind::LowI8x16S)
4294     }
4295 
4296     fn visit_i32x4_extmul_low_i16x8_s(&mut self) -> Self::Output {
4297         self.masm
4298             .v128_extmul(&mut self.context, V128ExtMulKind::LowI16x8S)
4299     }
4300 
4301     fn visit_i64x2_extmul_low_i32x4_s(&mut self) -> Self::Output {
4302         self.masm
4303             .v128_extmul(&mut self.context, V128ExtMulKind::LowI32x4S)
4304     }
4305 
4306     fn visit_i16x8_extmul_low_i8x16_u(&mut self) -> Self::Output {
4307         self.masm
4308             .v128_extmul(&mut self.context, V128ExtMulKind::LowI8x16U)
4309     }
4310 
4311     fn visit_i32x4_extmul_low_i16x8_u(&mut self) -> Self::Output {
4312         self.masm
4313             .v128_extmul(&mut self.context, V128ExtMulKind::LowI16x8U)
4314     }
4315 
4316     fn visit_i64x2_extmul_low_i32x4_u(&mut self) -> Self::Output {
4317         self.masm
4318             .v128_extmul(&mut self.context, V128ExtMulKind::LowI32x4U)
4319     }
4320 
4321     fn visit_i16x8_extmul_high_i8x16_u(&mut self) -> Self::Output {
4322         self.masm
4323             .v128_extmul(&mut self.context, V128ExtMulKind::HighI8x16U)
4324     }
4325 
4326     fn visit_i32x4_extmul_high_i16x8_u(&mut self) -> Self::Output {
4327         self.masm
4328             .v128_extmul(&mut self.context, V128ExtMulKind::HighI16x8U)
4329     }
4330 
4331     fn visit_i64x2_extmul_high_i32x4_u(&mut self) -> Self::Output {
4332         self.masm
4333             .v128_extmul(&mut self.context, V128ExtMulKind::HighI32x4U)
4334     }
4335 
4336     fn visit_i16x8_extmul_high_i8x16_s(&mut self) -> Self::Output {
4337         self.masm
4338             .v128_extmul(&mut self.context, V128ExtMulKind::HighI8x16S)
4339     }
4340 
4341     fn visit_i32x4_extmul_high_i16x8_s(&mut self) -> Self::Output {
4342         self.masm
4343             .v128_extmul(&mut self.context, V128ExtMulKind::HighI16x8S)
4344     }
4345 
4346     fn visit_i64x2_extmul_high_i32x4_s(&mut self) -> Self::Output {
4347         self.masm
4348             .v128_extmul(&mut self.context, V128ExtMulKind::HighI32x4S)
4349     }
4350 
4351     fn visit_i16x8_extadd_pairwise_i8x16_s(&mut self) -> Self::Output {
4352         self.context.unop(self.masm, |masm, op| {
4353             masm.v128_extadd_pairwise(op, writable!(op), V128ExtAddKind::I8x16S)?;
4354             Ok(TypedReg::v128(op))
4355         })
4356     }
4357 
4358     fn visit_i16x8_extadd_pairwise_i8x16_u(&mut self) -> Self::Output {
4359         self.context.unop(self.masm, |masm, op| {
4360             masm.v128_extadd_pairwise(op, writable!(op), V128ExtAddKind::I8x16U)?;
4361             Ok(TypedReg::v128(op))
4362         })
4363     }
4364 
4365     fn visit_i32x4_extadd_pairwise_i16x8_s(&mut self) -> Self::Output {
4366         self.context.unop(self.masm, |masm, op| {
4367             masm.v128_extadd_pairwise(op, writable!(op), V128ExtAddKind::I16x8S)?;
4368             Ok(TypedReg::v128(op))
4369         })
4370     }
4371 
4372     fn visit_i32x4_extadd_pairwise_i16x8_u(&mut self) -> Self::Output {
4373         self.context.unop(self.masm, |masm, op| {
4374             masm.v128_extadd_pairwise(op, writable!(op), V128ExtAddKind::I16x8U)?;
4375             Ok(TypedReg::v128(op))
4376         })
4377     }
4378 
4379     fn visit_f32x4_add(&mut self) -> Self::Output {
4380         self.context
4381             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4382                 masm.v128_add(dst, src, writable!(dst), V128AddKind::F32x4)?;
4383                 Ok(TypedReg::v128(dst))
4384             })
4385     }
4386 
4387     fn visit_f64x2_add(&mut self) -> Self::Output {
4388         self.context
4389             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
4390                 masm.v128_add(dst, src, writable!(dst), V128AddKind::F64x2)?;
4391                 Ok(TypedReg::v128(dst))
4392             })
4393     }
4394 
4395     fn visit_f32x4_sub(&mut self) -> Self::Output {
4396         self.context
4397             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4398                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::F32x4)?;
4399                 Ok(TypedReg::v128(dst))
4400             })
4401     }
4402 
4403     fn visit_f64x2_sub(&mut self) -> Self::Output {
4404         self.context
4405             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
4406                 masm.v128_sub(dst, src, writable!(dst), V128SubKind::F64x2)?;
4407                 Ok(TypedReg::v128(dst))
4408             })
4409     }
4410 
4411     fn visit_f32x4_mul(&mut self) -> Self::Output {
4412         self.masm.v128_mul(&mut self.context, V128MulKind::F32x4)
4413     }
4414 
4415     fn visit_f64x2_mul(&mut self) -> Self::Output {
4416         self.masm.v128_mul(&mut self.context, V128MulKind::F64x2)
4417     }
4418 
4419     fn visit_f32x4_div(&mut self) -> Self::Output {
4420         self.context
4421             .binop(self.masm, OperandSize::S32, |masm, dst, src, size| {
4422                 masm.v128_div(dst, src, writable!(dst), size)?;
4423                 Ok(TypedReg::v128(dst))
4424             })
4425     }
4426 
4427     fn visit_f64x2_div(&mut self) -> Self::Output {
4428         self.context
4429             .binop(self.masm, OperandSize::S64, |masm, dst, src, size| {
4430                 masm.v128_div(dst, src, writable!(dst), size)?;
4431                 Ok(TypedReg::v128(dst))
4432             })
4433     }
4434 
4435     fn visit_f32x4_neg(&mut self) -> Self::Output {
4436         self.context.unop(self.masm, |masm, reg| {
4437             masm.v128_neg(writable!(reg), V128NegKind::F32x4)?;
4438             Ok(TypedReg::v128(reg))
4439         })
4440     }
4441 
4442     fn visit_f32x4_ceil(&mut self) -> Self::Output {
4443         self.context.unop(self.masm, |masm, reg| {
4444             masm.v128_ceil(reg, writable!(reg), OperandSize::S32)?;
4445             Ok(TypedReg::v128(reg))
4446         })
4447     }
4448 
4449     fn visit_f64x2_neg(&mut self) -> Self::Output {
4450         self.context.unop(self.masm, |masm, reg| {
4451             masm.v128_neg(writable!(reg), V128NegKind::F64x2)?;
4452             Ok(TypedReg::v128(reg))
4453         })
4454     }
4455 
4456     fn visit_f64x2_ceil(&mut self) -> Self::Output {
4457         self.context.unop(self.masm, |masm, reg| {
4458             masm.v128_ceil(reg, writable!(reg), OperandSize::S64)?;
4459             Ok(TypedReg::v128(reg))
4460         })
4461     }
4462 
4463     fn visit_f32x4_sqrt(&mut self) -> Self::Output {
4464         self.context.unop(self.masm, |masm, reg| {
4465             masm.v128_sqrt(reg, writable!(reg), OperandSize::S32)?;
4466             Ok(TypedReg::v128(reg))
4467         })
4468     }
4469 
4470     fn visit_f32x4_floor(&mut self) -> Self::Output {
4471         self.context.unop(self.masm, |masm, reg| {
4472             masm.v128_floor(reg, writable!(reg), OperandSize::S32)?;
4473             Ok(TypedReg::v128(reg))
4474         })
4475     }
4476 
4477     fn visit_f64x2_sqrt(&mut self) -> Self::Output {
4478         self.context.unop(self.masm, |masm, reg| {
4479             masm.v128_sqrt(reg, writable!(reg), OperandSize::S64)?;
4480             Ok(TypedReg::v128(reg))
4481         })
4482     }
4483 
4484     fn visit_f64x2_floor(&mut self) -> Self::Output {
4485         self.context.unop(self.masm, |masm, reg| {
4486             masm.v128_floor(reg, writable!(reg), OperandSize::S64)?;
4487             Ok(TypedReg::v128(reg))
4488         })
4489     }
4490 
4491     fn visit_f32x4_nearest(&mut self) -> Self::Output {
4492         self.context.unop(self.masm, |masm, reg| {
4493             masm.v128_nearest(reg, writable!(reg), OperandSize::S32)?;
4494             Ok(TypedReg::v128(reg))
4495         })
4496     }
4497 
4498     fn visit_f64x2_nearest(&mut self) -> Self::Output {
4499         self.context.unop(self.masm, |masm, reg| {
4500             masm.v128_nearest(reg, writable!(reg), OperandSize::S64)?;
4501             Ok(TypedReg::v128(reg))
4502         })
4503     }
4504 
4505     fn visit_f32x4_trunc(&mut self) -> Self::Output {
4506         self.masm
4507             .v128_trunc(&mut self.context, V128TruncKind::F32x4)
4508     }
4509 
4510     fn visit_f64x2_trunc(&mut self) -> Self::Output {
4511         self.masm
4512             .v128_trunc(&mut self.context, V128TruncKind::F64x2)
4513     }
4514 
4515     fn visit_v128_load32_zero(&mut self, memarg: MemArg) -> Self::Output {
4516         self.emit_wasm_load(
4517             &memarg,
4518             WasmValType::V128,
4519             LoadKind::VectorZero(OperandSize::S32),
4520         )
4521     }
4522 
4523     fn visit_v128_load64_zero(&mut self, memarg: MemArg) -> Self::Output {
4524         self.emit_wasm_load(
4525             &memarg,
4526             WasmValType::V128,
4527             LoadKind::VectorZero(OperandSize::S64),
4528         )
4529     }
4530 
4531     fn visit_f32x4_pmin(&mut self) -> Self::Output {
4532         self.context
4533             .binop(self.masm, OperandSize::S32, |masm, dst, src, size| {
4534                 masm.v128_pmin(dst, src, writable!(dst), size)?;
4535                 Ok(TypedReg::v128(dst))
4536             })
4537     }
4538 
4539     fn visit_f64x2_pmin(&mut self) -> Self::Output {
4540         self.context
4541             .binop(self.masm, OperandSize::S64, |masm, dst, src, size| {
4542                 masm.v128_pmin(dst, src, writable!(dst), size)?;
4543                 Ok(TypedReg::v128(dst))
4544             })
4545     }
4546 
4547     fn visit_f32x4_pmax(&mut self) -> Self::Output {
4548         self.context
4549             .binop(self.masm, OperandSize::S32, |masm, dst, src, size| {
4550                 masm.v128_pmax(dst, src, writable!(dst), size)?;
4551                 Ok(TypedReg::v128(dst))
4552             })
4553     }
4554 
4555     fn visit_f64x2_pmax(&mut self) -> Self::Output {
4556         self.context
4557             .binop(self.masm, OperandSize::S64, |masm, dst, src, size| {
4558                 masm.v128_pmax(dst, src, writable!(dst), size)?;
4559                 Ok(TypedReg::v128(dst))
4560             })
4561     }
4562 
4563     fn visit_f32x4_min(&mut self) -> Self::Output {
4564         self.context
4565             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4566                 masm.v128_min(dst, src, writable!(dst), V128MinKind::F32x4)?;
4567                 Ok(TypedReg::v128(dst))
4568             })
4569     }
4570 
4571     fn visit_f64x2_min(&mut self) -> Self::Output {
4572         self.context
4573             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
4574                 masm.v128_min(dst, src, writable!(dst), V128MinKind::F64x2)?;
4575                 Ok(TypedReg::v128(dst))
4576             })
4577     }
4578 
4579     fn visit_f32x4_max(&mut self) -> Self::Output {
4580         self.context
4581             .binop(self.masm, OperandSize::S32, |masm, dst, src, _size| {
4582                 masm.v128_max(dst, src, writable!(dst), V128MaxKind::F32x4)?;
4583                 Ok(TypedReg::v128(dst))
4584             })
4585     }
4586 
4587     fn visit_f64x2_max(&mut self) -> Self::Output {
4588         self.context
4589             .binop(self.masm, OperandSize::S64, |masm, dst, src, _size| {
4590                 masm.v128_max(dst, src, writable!(dst), V128MaxKind::F64x2)?;
4591                 Ok(TypedReg::v128(dst))
4592             })
4593     }
4594 
4595     wasmparser::for_each_visit_simd_operator!(def_unsupported);
4596 }
4597 
4598 impl<'a, 'translation, 'data, M> CodeGen<'a, 'translation, 'data, M, Emission>
4599 where
4600     M: MacroAssembler,
4601 {
4602     fn cmp_i32s(&mut self, kind: IntCmpKind) -> Result<()> {
4603         self.context.i32_binop(self.masm, |masm, dst, src, size| {
4604             masm.cmp_with_set(writable!(dst), src, kind, size)?;
4605             Ok(TypedReg::i32(dst))
4606         })
4607     }
4608 
4609     fn cmp_i64s(&mut self, kind: IntCmpKind) -> Result<()> {
4610         self.context
4611             .i64_binop(self.masm, move |masm, dst, src, size| {
4612                 masm.cmp_with_set(writable!(dst), src, kind, size)?;
4613                 Ok(TypedReg::i32(dst)) // Return value for comparisons is an `i32`.
4614             })
4615     }
4616 }
4617 
4618 impl TryFrom<WasmValType> for OperandSize {
4619     type Error = crate::Error;
4620     fn try_from(ty: WasmValType) -> Result<OperandSize> {
4621         let ty = match ty {
4622             WasmValType::I32 | WasmValType::F32 => OperandSize::S32,
4623             WasmValType::I64 | WasmValType::F64 => OperandSize::S64,
4624             WasmValType::V128 => OperandSize::S128,
4625             WasmValType::Ref(rt) => {
4626                 match rt.heap_type {
4627                     // TODO: Hardcoded size, assuming 64-bit support only. Once
4628                     // Wasmtime supports 32-bit architectures, this will need
4629                     // to be updated in such a way that the calculation of the
4630                     // OperandSize will depend on the target's  pointer size.
4631                     WasmHeapType::Func => OperandSize::S64,
4632                     WasmHeapType::Extern => OperandSize::S64,
4633                     _ => bail!(CodeGenError::unsupported_wasm_type()),
4634                 }
4635             }
4636         };
4637         Ok(ty)
4638     }
4639 }
4640