1 //===-- MipsInstPrinter.cpp - Convert Mips MCInst to assembly syntax ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class prints an Mips MCInst to a .s file.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "asm-printer"
15 #include "MipsInstPrinter.h"
16 #include "MipsInstrInfo.h"
17 #include "llvm/ADT/StringExtras.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrInfo.h"
21 #include "llvm/MC/MCSymbol.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/raw_ostream.h"
26 #include "MipsGenAsmWriter.inc"
28 const char* Mips::MipsFCCToString(Mips::CondCode CC) {
31 case FCOND_T: return "f";
33 case FCOND_OR: return "un";
35 case FCOND_UNE: return "eq";
37 case FCOND_ONE: return "ueq";
39 case FCOND_UGE: return "olt";
41 case FCOND_OGE: return "ult";
43 case FCOND_UGT: return "ole";
45 case FCOND_OGT: return "ule";
47 case FCOND_ST: return "sf";
49 case FCOND_GLE: return "ngle";
51 case FCOND_SNE: return "seq";
53 case FCOND_GL: return "ngl";
55 case FCOND_NLT: return "lt";
57 case FCOND_GE: return "nge";
59 case FCOND_NLE: return "le";
61 case FCOND_GT: return "ngt";
63 llvm_unreachable("Impossible condition code!");
66 void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
67 OS << '$' << StringRef(getRegisterName(RegNo)).lower();
70 void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
72 switch (MI->getOpcode()) {
77 O << "\t.set\tpush\n";
78 O << "\t.set\tmips32r2\n";
81 printInstruction(MI, O);
82 printAnnotation(O, Annot);
84 switch (MI->getOpcode()) {
93 static void printExpr(const MCExpr *Expr, raw_ostream &OS) {
95 const MCSymbolRefExpr *SRE;
97 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
98 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
99 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
100 assert(SRE && CE && "Binary expression must be sym+const.");
101 Offset = CE->getValue();
103 else if (!(SRE = dyn_cast<MCSymbolRefExpr>(Expr)))
104 assert(false && "Unexpected MCExpr type.");
106 MCSymbolRefExpr::VariantKind Kind = SRE->getKind();
109 default: llvm_unreachable("Invalid kind!");
110 case MCSymbolRefExpr::VK_None: break;
111 case MCSymbolRefExpr::VK_Mips_GPREL: OS << "%gp_rel("; break;
112 case MCSymbolRefExpr::VK_Mips_GOT_CALL: OS << "%call16("; break;
113 case MCSymbolRefExpr::VK_Mips_GOT16: OS << "%got("; break;
114 case MCSymbolRefExpr::VK_Mips_GOT: OS << "%got("; break;
115 case MCSymbolRefExpr::VK_Mips_ABS_HI: OS << "%hi("; break;
116 case MCSymbolRefExpr::VK_Mips_ABS_LO: OS << "%lo("; break;
117 case MCSymbolRefExpr::VK_Mips_TLSGD: OS << "%tlsgd("; break;
118 case MCSymbolRefExpr::VK_Mips_TLSLDM: OS << "%tlsldm("; break;
119 case MCSymbolRefExpr::VK_Mips_DTPREL_HI: OS << "%dtprel_hi("; break;
120 case MCSymbolRefExpr::VK_Mips_DTPREL_LO: OS << "%dtprel_lo("; break;
121 case MCSymbolRefExpr::VK_Mips_GOTTPREL: OS << "%gottprel("; break;
122 case MCSymbolRefExpr::VK_Mips_TPREL_HI: OS << "%tprel_hi("; break;
123 case MCSymbolRefExpr::VK_Mips_TPREL_LO: OS << "%tprel_lo("; break;
124 case MCSymbolRefExpr::VK_Mips_GPOFF_HI: OS << "%hi(%neg(%gp_rel("; break;
125 case MCSymbolRefExpr::VK_Mips_GPOFF_LO: OS << "%lo(%neg(%gp_rel("; break;
126 case MCSymbolRefExpr::VK_Mips_GOT_DISP: OS << "%got_disp("; break;
127 case MCSymbolRefExpr::VK_Mips_GOT_PAGE: OS << "%got_page("; break;
128 case MCSymbolRefExpr::VK_Mips_GOT_OFST: OS << "%got_ofst("; break;
131 OS << SRE->getSymbol();
139 if ((Kind == MCSymbolRefExpr::VK_Mips_GPOFF_HI) ||
140 (Kind == MCSymbolRefExpr::VK_Mips_GPOFF_LO))
142 else if (Kind != MCSymbolRefExpr::VK_None)
146 void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
148 const MCOperand &Op = MI->getOperand(OpNo);
150 printRegName(O, Op.getReg());
159 assert(Op.isExpr() && "unknown operand kind in printOperand");
160 printExpr(Op.getExpr(), O);
163 void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum,
165 const MCOperand &MO = MI->getOperand(opNum);
167 O << (unsigned short int)MO.getImm();
169 printOperand(MI, opNum, O);
172 void MipsInstPrinter::
173 printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) {
174 // Load/Store memory operands -- imm($reg)
175 // If PIC target the target is loaded as the
176 // pattern lw $25,%call16($28)
177 printOperand(MI, opNum+1, O);
179 printOperand(MI, opNum, O);
183 void MipsInstPrinter::
184 printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) {
185 // when using stack locations for not load/store instructions
186 // print the same way as all normal 3 operand instructions.
187 printOperand(MI, opNum, O);
189 printOperand(MI, opNum+1, O);
193 void MipsInstPrinter::
194 printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) {
195 const MCOperand& MO = MI->getOperand(opNum);
196 O << MipsFCCToString((Mips::CondCode)MO.getImm());