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 "llvm/ADT/StringExtras.h"
17 #include "llvm/MC/MCExpr.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCInstrInfo.h"
20 #include "llvm/MC/MCSymbol.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/raw_ostream.h"
25 #include "MipsGenAsmWriter.inc"
27 const char* Mips::MipsFCCToString(Mips::CondCode CC) {
30 case FCOND_T: return "f";
32 case FCOND_OR: return "un";
34 case FCOND_UNE: return "eq";
36 case FCOND_ONE: return "ueq";
38 case FCOND_UGE: return "olt";
40 case FCOND_OGE: return "ult";
42 case FCOND_UGT: return "ole";
44 case FCOND_OGT: return "ule";
46 case FCOND_ST: return "sf";
48 case FCOND_GLE: return "ngle";
50 case FCOND_SNE: return "seq";
52 case FCOND_GL: return "ngl";
54 case FCOND_NLT: return "lt";
56 case FCOND_GE: return "nge";
58 case FCOND_NLE: return "le";
60 case FCOND_GT: return "ngt";
62 llvm_unreachable("Impossible condition code!");
65 void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
66 OS << '$' << StringRef(getRegisterName(RegNo)).lower();
69 void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
71 printInstruction(MI, O);
72 printAnnotation(O, Annot);
75 static void printExpr(const MCExpr *Expr, raw_ostream &OS) {
77 const MCSymbolRefExpr *SRE;
79 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
80 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
81 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
82 assert(SRE && CE && "Binary expression must be sym+const.");
83 Offset = CE->getValue();
85 else if (!(SRE = dyn_cast<MCSymbolRefExpr>(Expr)))
86 assert(false && "Unexpected MCExpr type.");
88 MCSymbolRefExpr::VariantKind Kind = SRE->getKind();
91 default: llvm_unreachable("Invalid kind!");
92 case MCSymbolRefExpr::VK_None: break;
93 case MCSymbolRefExpr::VK_Mips_GPREL: OS << "%gp_rel("; break;
94 case MCSymbolRefExpr::VK_Mips_GOT_CALL: OS << "%call16("; break;
95 case MCSymbolRefExpr::VK_Mips_GOT16: OS << "%got("; break;
96 case MCSymbolRefExpr::VK_Mips_GOT: OS << "%got("; break;
97 case MCSymbolRefExpr::VK_Mips_ABS_HI: OS << "%hi("; break;
98 case MCSymbolRefExpr::VK_Mips_ABS_LO: OS << "%lo("; break;
99 case MCSymbolRefExpr::VK_Mips_TLSGD: OS << "%tlsgd("; break;
100 case MCSymbolRefExpr::VK_Mips_TLSLDM: OS << "%tlsldm("; break;
101 case MCSymbolRefExpr::VK_Mips_DTPREL_HI: OS << "%dtprel_hi("; break;
102 case MCSymbolRefExpr::VK_Mips_DTPREL_LO: OS << "%dtprel_lo("; break;
103 case MCSymbolRefExpr::VK_Mips_GOTTPREL: OS << "%gottprel("; break;
104 case MCSymbolRefExpr::VK_Mips_TPREL_HI: OS << "%tprel_hi("; break;
105 case MCSymbolRefExpr::VK_Mips_TPREL_LO: OS << "%tprel_lo("; break;
106 case MCSymbolRefExpr::VK_Mips_GPOFF_HI: OS << "%hi(%neg(%gp_rel("; break;
107 case MCSymbolRefExpr::VK_Mips_GPOFF_LO: OS << "%lo(%neg(%gp_rel("; break;
108 case MCSymbolRefExpr::VK_Mips_GOT_DISP: OS << "%got_disp("; break;
109 case MCSymbolRefExpr::VK_Mips_GOT_PAGE: OS << "%got_page("; break;
110 case MCSymbolRefExpr::VK_Mips_GOT_OFST: OS << "%got_ofst("; break;
113 OS << SRE->getSymbol();
121 if ((Kind == MCSymbolRefExpr::VK_Mips_GPOFF_HI) ||
122 (Kind == MCSymbolRefExpr::VK_Mips_GPOFF_LO))
124 else if (Kind != MCSymbolRefExpr::VK_None)
128 void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
130 const MCOperand &Op = MI->getOperand(OpNo);
132 printRegName(O, Op.getReg());
141 assert(Op.isExpr() && "unknown operand kind in printOperand");
142 printExpr(Op.getExpr(), O);
145 void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum,
147 const MCOperand &MO = MI->getOperand(opNum);
149 O << (unsigned short int)MO.getImm();
151 printOperand(MI, opNum, O);
154 void MipsInstPrinter::
155 printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) {
156 // Load/Store memory operands -- imm($reg)
157 // If PIC target the target is loaded as the
158 // pattern lw $25,%call16($28)
159 printOperand(MI, opNum+1, O);
161 printOperand(MI, opNum, O);
165 void MipsInstPrinter::
166 printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) {
167 // when using stack locations for not load/store instructions
168 // print the same way as all normal 3 operand instructions.
169 printOperand(MI, opNum, O);
171 printOperand(MI, opNum+1, O);
175 void MipsInstPrinter::
176 printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) {
177 const MCOperand& MO = MI->getOperand(opNum);
178 O << MipsFCCToString((Mips::CondCode)MO.getImm());