1 //===-- SparcMCInstLower.cpp - Convert Sparc MachineInstr to MCInst -------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains code to lower Sparc MachineInstrs to their corresponding
11 // MCInst records.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "Sparc.h"
16 #include "MCTargetDesc/SparcBaseInfo.h"
17 #include "MCTargetDesc/SparcMCExpr.h"
18 #include "llvm/ADT/SmallString.h"
19 #include "llvm/CodeGen/AsmPrinter.h"
20 #include "llvm/CodeGen/MachineFunction.h"
21 #include "llvm/CodeGen/MachineInstr.h"
22 #include "llvm/CodeGen/MachineOperand.h"
23 #include "llvm/IR/Mangler.h"
24 #include "llvm/MC/MCAsmInfo.h"
25 #include "llvm/MC/MCContext.h"
26 #include "llvm/MC/MCExpr.h"
27 #include "llvm/MC/MCInst.h"
28 
29 using namespace llvm;
30 
31 
32 static MCOperand LowerSymbolOperand(const MachineInstr *MI,
33                                     const MachineOperand &MO,
34                                     AsmPrinter &AP) {
35 
36   SparcMCExpr::VariantKind Kind;
37   const MCSymbol *Symbol = 0;
38 
39   unsigned TF = MO.getTargetFlags();
40 
41   switch(TF) {
42   default:      llvm_unreachable("Unknown target flags on operand");
43   case SPII::MO_NO_FLAG:      Kind = SparcMCExpr::VK_Sparc_None; break;
44   case SPII::MO_LO:           Kind = SparcMCExpr::VK_Sparc_LO; break;
45   case SPII::MO_HI:           Kind = SparcMCExpr::VK_Sparc_HI; break;
46   case SPII::MO_H44:          Kind = SparcMCExpr::VK_Sparc_H44; break;
47   case SPII::MO_M44:          Kind = SparcMCExpr::VK_Sparc_M44; break;
48   case SPII::MO_L44:          Kind = SparcMCExpr::VK_Sparc_L44; break;
49   case SPII::MO_HH:           Kind = SparcMCExpr::VK_Sparc_HH; break;
50   case SPII::MO_HM:           Kind = SparcMCExpr::VK_Sparc_HM; break;
51   case SPII::MO_TLS_GD_HI22:  Kind = SparcMCExpr::VK_Sparc_TLS_GD_HI22; break;
52   case SPII::MO_TLS_GD_LO10:  Kind = SparcMCExpr::VK_Sparc_TLS_GD_LO10; break;
53   case SPII::MO_TLS_GD_ADD:   Kind = SparcMCExpr::VK_Sparc_TLS_GD_ADD; break;
54   case SPII::MO_TLS_GD_CALL:  Kind = SparcMCExpr::VK_Sparc_TLS_GD_CALL; break;
55   case SPII::MO_TLS_LDM_HI22: Kind = SparcMCExpr::VK_Sparc_TLS_LDM_HI22; break;
56   case SPII::MO_TLS_LDM_LO10: Kind = SparcMCExpr::VK_Sparc_TLS_LDM_LO10; break;
57   case SPII::MO_TLS_LDM_ADD:  Kind = SparcMCExpr::VK_Sparc_TLS_LDM_ADD; break;
58   case SPII::MO_TLS_LDM_CALL: Kind = SparcMCExpr::VK_Sparc_TLS_LDM_CALL; break;
59   case SPII::MO_TLS_LDO_HIX22:Kind = SparcMCExpr::VK_Sparc_TLS_LDO_HIX22; break;
60   case SPII::MO_TLS_LDO_LOX10:Kind = SparcMCExpr::VK_Sparc_TLS_LDO_LOX10; break;
61   case SPII::MO_TLS_LDO_ADD:  Kind = SparcMCExpr::VK_Sparc_TLS_LDO_ADD; break;
62   case SPII::MO_TLS_IE_HI22:  Kind = SparcMCExpr::VK_Sparc_TLS_IE_HI22; break;
63   case SPII::MO_TLS_IE_LO10:  Kind = SparcMCExpr::VK_Sparc_TLS_IE_LO10; break;
64   case SPII::MO_TLS_IE_LD:    Kind = SparcMCExpr::VK_Sparc_TLS_IE_LD; break;
65   case SPII::MO_TLS_IE_LDX:   Kind = SparcMCExpr::VK_Sparc_TLS_IE_LDX; break;
66   case SPII::MO_TLS_IE_ADD:   Kind = SparcMCExpr::VK_Sparc_TLS_IE_ADD; break;
67   case SPII::MO_TLS_LE_HIX22: Kind = SparcMCExpr::VK_Sparc_TLS_LE_HIX22; break;
68   case SPII::MO_TLS_LE_LOX10: Kind = SparcMCExpr::VK_Sparc_TLS_LE_LOX10; break;
69   }
70 
71   switch(MO.getType()) {
72   default: llvm_unreachable("Unknown type in LowerSymbolOperand");
73   case MachineOperand::MO_MachineBasicBlock:
74     Symbol = MO.getMBB()->getSymbol();
75     break;
76 
77   case MachineOperand::MO_GlobalAddress:
78     Symbol = AP.getSymbol(MO.getGlobal());
79     break;
80 
81   case MachineOperand::MO_BlockAddress:
82     Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
83     break;
84 
85   case MachineOperand::MO_ExternalSymbol:
86     Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
87     break;
88 
89   case MachineOperand::MO_ConstantPoolIndex:
90     Symbol = AP.GetCPISymbol(MO.getIndex());
91     break;
92   }
93 
94   const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Symbol,
95                                                          AP.OutContext);
96   const SparcMCExpr *expr = SparcMCExpr::Create(Kind, MCSym,
97                                                 AP.OutContext);
98   return MCOperand::CreateExpr(expr);
99 }
100 
101 static MCOperand LowerOperand(const MachineInstr *MI,
102                               const MachineOperand &MO,
103                               AsmPrinter &AP) {
104   switch(MO.getType()) {
105   default: llvm_unreachable("unknown operand type"); break;
106   case MachineOperand::MO_Register:
107     if (MO.isImplicit())
108       break;
109     return MCOperand::CreateReg(MO.getReg());
110 
111   case MachineOperand::MO_Immediate:
112     return MCOperand::CreateImm(MO.getImm());
113 
114   case MachineOperand::MO_MachineBasicBlock:
115   case MachineOperand::MO_GlobalAddress:
116   case MachineOperand::MO_BlockAddress:
117   case MachineOperand::MO_ExternalSymbol:
118   case MachineOperand::MO_ConstantPoolIndex:
119     return LowerSymbolOperand(MI, MO, AP);
120 
121   case MachineOperand::MO_RegisterMask:   break;
122 
123   }
124   return MCOperand();
125 }
126 
127 void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
128                                           MCInst &OutMI,
129                                           AsmPrinter &AP)
130 {
131 
132   OutMI.setOpcode(MI->getOpcode());
133 
134   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
135     const MachineOperand &MO = MI->getOperand(i);
136     MCOperand MCOp = LowerOperand(MI, MO, AP);
137 
138     if (MCOp.isValid())
139       OutMI.addOperand(MCOp);
140   }
141 }
142