1 //===-- XCoreInstPrinter.cpp - Convert XCore MCInst to assembly syntax ----===//
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 class prints an XCore MCInst to a .s file.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "XCoreInstPrinter.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/MC/MCSymbol.h"
19 #include "llvm/Support/Casting.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/raw_ostream.h"
22 #include <cassert>
23
24 using namespace llvm;
25
26 #define DEBUG_TYPE "asm-printer"
27
28 #include "XCoreGenAsmWriter.inc"
29
printRegName(raw_ostream & OS,unsigned RegNo) const30 void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
31 OS << StringRef(getRegisterName(RegNo)).lower();
32 }
33
printInst(const MCInst * MI,raw_ostream & O,StringRef Annot,const MCSubtargetInfo & STI)34 void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
35 StringRef Annot, const MCSubtargetInfo &STI) {
36 printInstruction(MI, O);
37 printAnnotation(O, Annot);
38 }
39
40 void XCoreInstPrinter::
printInlineJT(const MCInst * MI,int opNum,raw_ostream & O)41 printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) {
42 report_fatal_error("can't handle InlineJT");
43 }
44
45 void XCoreInstPrinter::
printInlineJT32(const MCInst * MI,int opNum,raw_ostream & O)46 printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) {
47 report_fatal_error("can't handle InlineJT32");
48 }
49
printExpr(const MCExpr * Expr,const MCAsmInfo * MAI,raw_ostream & OS)50 static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI,
51 raw_ostream &OS) {
52 int Offset = 0;
53 const MCSymbolRefExpr *SRE;
54
55 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
56 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
57 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
58 assert(SRE && CE && "Binary expression must be sym+const.");
59 Offset = CE->getValue();
60 } else {
61 SRE = dyn_cast<MCSymbolRefExpr>(Expr);
62 assert(SRE && "Unexpected MCExpr type.");
63 }
64 assert(SRE->getKind() == MCSymbolRefExpr::VK_None);
65
66 SRE->getSymbol().print(OS, MAI);
67
68 if (Offset) {
69 if (Offset > 0)
70 OS << '+';
71 OS << Offset;
72 }
73 }
74
75 void XCoreInstPrinter::
printOperand(const MCInst * MI,unsigned OpNo,raw_ostream & O)76 printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) {
77 const MCOperand &Op = MI->getOperand(OpNo);
78 if (Op.isReg()) {
79 printRegName(O, Op.getReg());
80 return;
81 }
82
83 if (Op.isImm()) {
84 O << Op.getImm();
85 return;
86 }
87
88 assert(Op.isExpr() && "unknown operand kind in printOperand");
89 printExpr(Op.getExpr(), &MAI, O);
90 }
91