MipsInstPrinter.cpp revision 239462
1//===-- MipsInstPrinter.cpp - Convert Mips 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 Mips MCInst to a .s file. 11// 12//===----------------------------------------------------------------------===// 13 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" 24using namespace llvm; 25 26#include "MipsGenAsmWriter.inc" 27 28const char* Mips::MipsFCCToString(Mips::CondCode CC) { 29 switch (CC) { 30 case FCOND_F: 31 case FCOND_T: return "f"; 32 case FCOND_UN: 33 case FCOND_OR: return "un"; 34 case FCOND_OEQ: 35 case FCOND_UNE: return "eq"; 36 case FCOND_UEQ: 37 case FCOND_ONE: return "ueq"; 38 case FCOND_OLT: 39 case FCOND_UGE: return "olt"; 40 case FCOND_ULT: 41 case FCOND_OGE: return "ult"; 42 case FCOND_OLE: 43 case FCOND_UGT: return "ole"; 44 case FCOND_ULE: 45 case FCOND_OGT: return "ule"; 46 case FCOND_SF: 47 case FCOND_ST: return "sf"; 48 case FCOND_NGLE: 49 case FCOND_GLE: return "ngle"; 50 case FCOND_SEQ: 51 case FCOND_SNE: return "seq"; 52 case FCOND_NGL: 53 case FCOND_GL: return "ngl"; 54 case FCOND_LT: 55 case FCOND_NLT: return "lt"; 56 case FCOND_NGE: 57 case FCOND_GE: return "nge"; 58 case FCOND_LE: 59 case FCOND_NLE: return "le"; 60 case FCOND_NGT: 61 case FCOND_GT: return "ngt"; 62 } 63 llvm_unreachable("Impossible condition code!"); 64} 65 66void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const { 67 OS << '$' << StringRef(getRegisterName(RegNo)).lower(); 68} 69 70void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O, 71 StringRef Annot) { 72 switch (MI->getOpcode()) { 73 default: 74 break; 75 case Mips::RDHWR: 76 case Mips::RDHWR64: 77 O << "\t.set\tpush\n"; 78 O << "\t.set\tmips32r2\n"; 79 } 80 81 printInstruction(MI, O); 82 printAnnotation(O, Annot); 83 84 switch (MI->getOpcode()) { 85 default: 86 break; 87 case Mips::RDHWR: 88 case Mips::RDHWR64: 89 O << "\n\t.set\tpop"; 90 } 91} 92 93static void printExpr(const MCExpr *Expr, raw_ostream &OS) { 94 int Offset = 0; 95 const MCSymbolRefExpr *SRE; 96 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(); 102 } 103 else if (!(SRE = dyn_cast<MCSymbolRefExpr>(Expr))) 104 assert(false && "Unexpected MCExpr type."); 105 106 MCSymbolRefExpr::VariantKind Kind = SRE->getKind(); 107 108 switch (Kind) { 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; 129 case MCSymbolRefExpr::VK_Mips_HIGHER: OS << "%higher("; break; 130 case MCSymbolRefExpr::VK_Mips_HIGHEST: OS << "%highest("; break; 131 } 132 133 OS << SRE->getSymbol(); 134 135 if (Offset) { 136 if (Offset > 0) 137 OS << '+'; 138 OS << Offset; 139 } 140 141 if ((Kind == MCSymbolRefExpr::VK_Mips_GPOFF_HI) || 142 (Kind == MCSymbolRefExpr::VK_Mips_GPOFF_LO)) 143 OS << ")))"; 144 else if (Kind != MCSymbolRefExpr::VK_None) 145 OS << ')'; 146} 147 148void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo, 149 raw_ostream &O) { 150 const MCOperand &Op = MI->getOperand(OpNo); 151 if (Op.isReg()) { 152 printRegName(O, Op.getReg()); 153 return; 154 } 155 156 if (Op.isImm()) { 157 O << Op.getImm(); 158 return; 159 } 160 161 assert(Op.isExpr() && "unknown operand kind in printOperand"); 162 printExpr(Op.getExpr(), O); 163} 164 165void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum, 166 raw_ostream &O) { 167 const MCOperand &MO = MI->getOperand(opNum); 168 if (MO.isImm()) 169 O << (unsigned short int)MO.getImm(); 170 else 171 printOperand(MI, opNum, O); 172} 173 174void MipsInstPrinter:: 175printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) { 176 // Load/Store memory operands -- imm($reg) 177 // If PIC target the target is loaded as the 178 // pattern lw $25,%call16($28) 179 printOperand(MI, opNum+1, O); 180 O << "("; 181 printOperand(MI, opNum, O); 182 O << ")"; 183} 184 185void MipsInstPrinter:: 186printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) { 187 // when using stack locations for not load/store instructions 188 // print the same way as all normal 3 operand instructions. 189 printOperand(MI, opNum, O); 190 O << ", "; 191 printOperand(MI, opNum+1, O); 192 return; 193} 194 195void MipsInstPrinter:: 196printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) { 197 const MCOperand& MO = MI->getOperand(opNum); 198 O << MipsFCCToString((Mips::CondCode)MO.getImm()); 199} 200