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 #define PRINT_ALIAS_INSTR
27 #include "MipsGenAsmWriter.inc"
29 const char* Mips::MipsFCCToString(Mips::CondCode CC) {
32 case FCOND_T: return "f";
34 case FCOND_OR: return "un";
36 case FCOND_UNE: return "eq";
38 case FCOND_ONE: return "ueq";
40 case FCOND_UGE: return "olt";
42 case FCOND_OGE: return "ult";
44 case FCOND_UGT: return "ole";
46 case FCOND_OGT: return "ule";
48 case FCOND_ST: return "sf";
50 case FCOND_GLE: return "ngle";
52 case FCOND_SNE: return "seq";
54 case FCOND_GL: return "ngl";
56 case FCOND_NLT: return "lt";
58 case FCOND_GE: return "nge";
60 case FCOND_NLE: return "le";
62 case FCOND_GT: return "ngt";
64 llvm_unreachable("Impossible condition code!");
67 void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
68 OS << '$' << StringRef(getRegisterName(RegNo)).lower();
71 void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
73 switch (MI->getOpcode()) {
78 O << "\t.set\tpush\n";
79 O << "\t.set\tmips32r2\n";
82 // Try to print any aliases first.
83 if (!printAliasInstr(MI, O))
84 printInstruction(MI, O);
85 printAnnotation(O, Annot);
87 switch (MI->getOpcode()) {
96 static void printExpr(const MCExpr *Expr, raw_ostream &OS) {
98 const MCSymbolRefExpr *SRE;
100 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
101 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
102 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
103 assert(SRE && CE && "Binary expression must be sym+const.");
104 Offset = CE->getValue();
106 else if (!(SRE = dyn_cast<MCSymbolRefExpr>(Expr)))
107 assert(false && "Unexpected MCExpr type.");
109 MCSymbolRefExpr::VariantKind Kind = SRE->getKind();
112 default: llvm_unreachable("Invalid kind!");
113 case MCSymbolRefExpr::VK_None: break;
114 case MCSymbolRefExpr::VK_Mips_GPREL: OS << "%gp_rel("; break;
115 case MCSymbolRefExpr::VK_Mips_GOT_CALL: OS << "%call16("; break;
116 case MCSymbolRefExpr::VK_Mips_GOT16: OS << "%got("; break;
117 case MCSymbolRefExpr::VK_Mips_GOT: OS << "%got("; break;
118 case MCSymbolRefExpr::VK_Mips_ABS_HI: OS << "%hi("; break;
119 case MCSymbolRefExpr::VK_Mips_ABS_LO: OS << "%lo("; break;
120 case MCSymbolRefExpr::VK_Mips_TLSGD: OS << "%tlsgd("; break;
121 case MCSymbolRefExpr::VK_Mips_TLSLDM: OS << "%tlsldm("; break;
122 case MCSymbolRefExpr::VK_Mips_DTPREL_HI: OS << "%dtprel_hi("; break;
123 case MCSymbolRefExpr::VK_Mips_DTPREL_LO: OS << "%dtprel_lo("; break;
124 case MCSymbolRefExpr::VK_Mips_GOTTPREL: OS << "%gottprel("; break;
125 case MCSymbolRefExpr::VK_Mips_TPREL_HI: OS << "%tprel_hi("; break;
126 case MCSymbolRefExpr::VK_Mips_TPREL_LO: OS << "%tprel_lo("; break;
127 case MCSymbolRefExpr::VK_Mips_GPOFF_HI: OS << "%hi(%neg(%gp_rel("; break;
128 case MCSymbolRefExpr::VK_Mips_GPOFF_LO: OS << "%lo(%neg(%gp_rel("; break;
129 case MCSymbolRefExpr::VK_Mips_GOT_DISP: OS << "%got_disp("; break;
130 case MCSymbolRefExpr::VK_Mips_GOT_PAGE: OS << "%got_page("; break;
131 case MCSymbolRefExpr::VK_Mips_GOT_OFST: OS << "%got_ofst("; break;
132 case MCSymbolRefExpr::VK_Mips_HIGHER: OS << "%higher("; break;
133 case MCSymbolRefExpr::VK_Mips_HIGHEST: OS << "%highest("; break;
134 case MCSymbolRefExpr::VK_Mips_GOT_HI16: OS << "%got_hi("; break;
135 case MCSymbolRefExpr::VK_Mips_GOT_LO16: OS << "%got_lo("; break;
136 case MCSymbolRefExpr::VK_Mips_CALL_HI16: OS << "%call_hi("; break;
137 case MCSymbolRefExpr::VK_Mips_CALL_LO16: OS << "%call_lo("; break;
140 OS << SRE->getSymbol();
148 if ((Kind == MCSymbolRefExpr::VK_Mips_GPOFF_HI) ||
149 (Kind == MCSymbolRefExpr::VK_Mips_GPOFF_LO))
151 else if (Kind != MCSymbolRefExpr::VK_None)
155 void MipsInstPrinter::printCPURegs(const MCInst *MI, unsigned OpNo,
157 printRegName(O, MI->getOperand(OpNo).getReg());
160 void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
162 const MCOperand &Op = MI->getOperand(OpNo);
164 printRegName(O, Op.getReg());
173 assert(Op.isExpr() && "unknown operand kind in printOperand");
174 printExpr(Op.getExpr(), O);
177 void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum,
179 const MCOperand &MO = MI->getOperand(opNum);
181 O << (unsigned short int)MO.getImm();
183 printOperand(MI, opNum, O);
186 void MipsInstPrinter::
187 printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) {
188 // Load/Store memory operands -- imm($reg)
189 // If PIC target the target is loaded as the
190 // pattern lw $25,%call16($28)
191 printOperand(MI, opNum+1, O);
193 printOperand(MI, opNum, O);
197 void MipsInstPrinter::
198 printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) {
199 // when using stack locations for not load/store instructions
200 // print the same way as all normal 3 operand instructions.
201 printOperand(MI, opNum, O);
203 printOperand(MI, opNum+1, O);
207 void MipsInstPrinter::
208 printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) {
209 const MCOperand& MO = MI->getOperand(opNum);
210 O << MipsFCCToString((Mips::CondCode)MO.getImm());