Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 1 | //===-- X86IntelAsmPrinter.cpp - Convert X86 LLVM code to Intel assembly --===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file was developed by the LLVM research group and is distributed under |
| 6 | // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains a printer that converts from our internal representation |
| 11 | // of machine-dependent LLVM code to Intel format assembly language. |
| 12 | // This printer is the output mechanism used by `llc'. |
| 13 | // |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
| 16 | #include "X86IntelAsmPrinter.h" |
Jim Laskey | a0f3d17 | 2006-09-07 22:06:40 +0000 | [diff] [blame] | 17 | #include "X86TargetAsmInfo.h" |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 18 | #include "X86.h" |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 19 | #include "llvm/CallingConv.h" |
Jeff Cohen | c884db4 | 2006-05-02 01:16:28 +0000 | [diff] [blame] | 20 | #include "llvm/Constants.h" |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 21 | #include "llvm/Module.h" |
| 22 | #include "llvm/Assembly/Writer.h" |
| 23 | #include "llvm/Support/Mangler.h" |
Jim Laskey | a0f3d17 | 2006-09-07 22:06:40 +0000 | [diff] [blame] | 24 | #include "llvm/Target/TargetAsmInfo.h" |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 25 | #include "llvm/Target/TargetOptions.h" |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 26 | using namespace llvm; |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 27 | |
| 28 | /// runOnMachineFunction - This uses the printMachineInstruction() |
| 29 | /// method to print assembly for each instruction. |
| 30 | /// |
| 31 | bool X86IntelAsmPrinter::runOnMachineFunction(MachineFunction &MF) { |
Chris Lattner | 8b8b951 | 2005-11-21 07:51:23 +0000 | [diff] [blame] | 32 | SetupMachineFunction(MF); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 33 | O << "\n\n"; |
| 34 | |
| 35 | // Print out constants referenced by the function |
Chris Lattner | d939f6c | 2005-11-21 08:32:23 +0000 | [diff] [blame] | 36 | EmitConstantPool(MF.getConstantPool()); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 37 | |
| 38 | // Print out labels for the function. |
Chris Lattner | e87e115 | 2006-09-26 03:57:53 +0000 | [diff] [blame^] | 39 | const Function *F = MF.getFunction(); |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 40 | unsigned CC = F->getCallingConv(); |
| 41 | |
| 42 | // Populate function information map. Actually, We don't want to populate |
| 43 | // non-stdcall or non-fastcall functions' information right now. |
Chris Lattner | e87e115 | 2006-09-26 03:57:53 +0000 | [diff] [blame^] | 44 | if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall) |
| 45 | FunctionInfoMap[F] = *MF.getInfo<X86FunctionInfo>(); |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 46 | |
| 47 | X86SharedAsmPrinter::decorateName(CurrentFnName, F); |
| 48 | |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 49 | switch (F->getLinkage()) { |
| 50 | default: assert(0 && "Unsupported linkage type!"); |
| 51 | case Function::InternalLinkage: |
| 52 | SwitchToTextSection("_text", F); |
| 53 | EmitAlignment(4); |
| 54 | break; |
| 55 | case Function::DLLExportLinkage: |
| 56 | DLLExportedFns.insert(CurrentFnName); |
| 57 | //FALLS THROUGH |
| 58 | case Function::ExternalLinkage: |
Jeff Cohen | c884db4 | 2006-05-02 01:16:28 +0000 | [diff] [blame] | 59 | O << "\tpublic " << CurrentFnName << "\n"; |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 60 | SwitchToTextSection("_text", F); |
| 61 | EmitAlignment(4); |
| 62 | break; |
| 63 | } |
| 64 | |
Jeff Cohen | c884db4 | 2006-05-02 01:16:28 +0000 | [diff] [blame] | 65 | O << CurrentFnName << "\tproc near\n"; |
Jim Laskey | 6b92b8e | 2006-04-07 20:44:42 +0000 | [diff] [blame] | 66 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 67 | // Print out code for the function. |
| 68 | for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); |
| 69 | I != E; ++I) { |
| 70 | // Print a label for the basic block if there are any predecessors. |
Nate Begeman | cdf38c4 | 2006-05-02 05:37:32 +0000 | [diff] [blame] | 71 | if (I->pred_begin() != I->pred_end()) { |
| 72 | printBasicBlockLabel(I, true); |
| 73 | O << '\n'; |
| 74 | } |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 75 | for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); |
| 76 | II != E; ++II) { |
| 77 | // Print the assembly for the instruction. |
| 78 | O << "\t"; |
| 79 | printMachineInstruction(II); |
| 80 | } |
| 81 | } |
| 82 | |
Jeff Cohen | c884db4 | 2006-05-02 01:16:28 +0000 | [diff] [blame] | 83 | O << CurrentFnName << "\tendp\n"; |
| 84 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 85 | // We didn't modify anything. |
| 86 | return false; |
| 87 | } |
| 88 | |
Nate Begeman | 391c5d2 | 2005-11-30 18:54:35 +0000 | [diff] [blame] | 89 | void X86IntelAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) { |
Nate Begeman | 6c7cb29 | 2005-07-14 22:52:25 +0000 | [diff] [blame] | 90 | unsigned char value = MI->getOperand(Op).getImmedValue(); |
| 91 | assert(value <= 7 && "Invalid ssecc argument!"); |
| 92 | switch (value) { |
| 93 | case 0: O << "eq"; break; |
| 94 | case 1: O << "lt"; break; |
| 95 | case 2: O << "le"; break; |
| 96 | case 3: O << "unord"; break; |
| 97 | case 4: O << "neq"; break; |
| 98 | case 5: O << "nlt"; break; |
| 99 | case 6: O << "nle"; break; |
| 100 | case 7: O << "ord"; break; |
| 101 | } |
| 102 | } |
| 103 | |
Chris Lattner | a3b8c57 | 2006-02-06 23:41:19 +0000 | [diff] [blame] | 104 | void X86IntelAsmPrinter::printOp(const MachineOperand &MO, |
| 105 | const char *Modifier) { |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 106 | const MRegisterInfo &RI = *TM.getRegisterInfo(); |
| 107 | switch (MO.getType()) { |
Chris Lattner | 2d90ac7 | 2006-05-04 18:05:43 +0000 | [diff] [blame] | 108 | case MachineOperand::MO_Register: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 109 | if (MRegisterInfo::isPhysicalRegister(MO.getReg())) { |
| 110 | unsigned Reg = MO.getReg(); |
Evan Cheng | cbe70e1 | 2006-05-31 22:34:26 +0000 | [diff] [blame] | 111 | if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 112 | MVT::ValueType VT = (strcmp(Modifier,"subreg64") == 0) ? |
| 113 | MVT::i64 : ((strcmp(Modifier, "subreg32") == 0) ? MVT::i32 : |
| 114 | ((strcmp(Modifier,"subreg16") == 0) ? MVT::i16 :MVT::i8)); |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 115 | Reg = getX86SubSuperRegister(Reg, VT); |
| 116 | } |
| 117 | O << RI.get(Reg).Name; |
| 118 | } else |
Chris Lattner | 99f2632 | 2006-05-01 05:53:50 +0000 | [diff] [blame] | 119 | O << "reg" << MO.getReg(); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 120 | return; |
| 121 | |
Chris Lattner | 63b3d71 | 2006-05-04 17:21:20 +0000 | [diff] [blame] | 122 | case MachineOperand::MO_Immediate: |
Evan Cheng | 138a24e | 2006-05-26 08:04:31 +0000 | [diff] [blame] | 123 | O << MO.getImmedValue(); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 124 | return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 125 | case MachineOperand::MO_MachineBasicBlock: |
| 126 | printBasicBlockLabel(MO.getMachineBasicBlock()); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 127 | return; |
Evan Cheng | a09bd81 | 2006-02-26 08:28:12 +0000 | [diff] [blame] | 128 | case MachineOperand::MO_ConstantPoolIndex: { |
| 129 | bool isMemOp = Modifier && !strcmp(Modifier, "mem"); |
| 130 | if (!isMemOp) O << "OFFSET "; |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 131 | O << "[" << TAI->getPrivateGlobalPrefix() << "CPI" |
| 132 | << getFunctionNumber() << "_" << MO.getConstantPoolIndex(); |
Evan Cheng | a09bd81 | 2006-02-26 08:28:12 +0000 | [diff] [blame] | 133 | int Offset = MO.getOffset(); |
| 134 | if (Offset > 0) |
| 135 | O << " + " << Offset; |
| 136 | else if (Offset < 0) |
| 137 | O << Offset; |
| 138 | O << "]"; |
| 139 | return; |
| 140 | } |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 141 | case MachineOperand::MO_GlobalAddress: { |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 142 | bool isCallOp = Modifier && !strcmp(Modifier, "call"); |
| 143 | bool isMemOp = Modifier && !strcmp(Modifier, "mem"); |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 144 | GlobalValue *GV = MO.getGlobal(); |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 145 | std::string Name = Mang->getValueName(GV); |
| 146 | |
| 147 | X86SharedAsmPrinter::decorateName(Name, GV); |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 148 | |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 149 | if (!isMemOp && !isCallOp) O << "OFFSET "; |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 150 | if (GV->hasDLLImportLinkage()) { |
| 151 | // FIXME: This should be fixed with full support of stdcall & fastcall |
| 152 | // CC's |
| 153 | O << "__imp_"; |
| 154 | } |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 155 | O << Name; |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 156 | int Offset = MO.getOffset(); |
| 157 | if (Offset > 0) |
| 158 | O << " + " << Offset; |
| 159 | else if (Offset < 0) |
Evan Cheng | 345c3f3 | 2005-11-30 01:59:00 +0000 | [diff] [blame] | 160 | O << Offset; |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 161 | return; |
| 162 | } |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 163 | case MachineOperand::MO_ExternalSymbol: { |
| 164 | bool isCallOp = Modifier && !strcmp(Modifier, "call"); |
Evan Cheng | 4c1aa86 | 2006-02-22 20:19:42 +0000 | [diff] [blame] | 165 | if (!isCallOp) O << "OFFSET "; |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 166 | O << TAI->getGlobalPrefix() << MO.getSymbolName(); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 167 | return; |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 168 | } |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 169 | default: |
| 170 | O << "<unknown operand type>"; return; |
| 171 | } |
| 172 | } |
| 173 | |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 174 | void X86IntelAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op, |
| 175 | const char *Modifier) { |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 176 | assert(isMem(MI, Op) && "Invalid memory reference!"); |
| 177 | |
| 178 | const MachineOperand &BaseReg = MI->getOperand(Op); |
| 179 | int ScaleVal = MI->getOperand(Op+1).getImmedValue(); |
| 180 | const MachineOperand &IndexReg = MI->getOperand(Op+2); |
| 181 | const MachineOperand &DispSpec = MI->getOperand(Op+3); |
| 182 | |
| 183 | if (BaseReg.isFrameIndex()) { |
| 184 | O << "[frame slot #" << BaseReg.getFrameIndex(); |
| 185 | if (DispSpec.getImmedValue()) |
| 186 | O << " + " << DispSpec.getImmedValue(); |
| 187 | O << "]"; |
| 188 | return; |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | O << "["; |
| 192 | bool NeedPlus = false; |
| 193 | if (BaseReg.getReg()) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 194 | printOp(BaseReg, Modifier); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 195 | NeedPlus = true; |
| 196 | } |
| 197 | |
| 198 | if (IndexReg.getReg()) { |
| 199 | if (NeedPlus) O << " + "; |
| 200 | if (ScaleVal != 1) |
| 201 | O << ScaleVal << "*"; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 202 | printOp(IndexReg, Modifier); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 203 | NeedPlus = true; |
| 204 | } |
| 205 | |
Evan Cheng | a09bd81 | 2006-02-26 08:28:12 +0000 | [diff] [blame] | 206 | if (DispSpec.isGlobalAddress() || DispSpec.isConstantPoolIndex()) { |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 207 | if (NeedPlus) |
| 208 | O << " + "; |
Evan Cheng | 2338c5c | 2006-02-07 08:38:37 +0000 | [diff] [blame] | 209 | printOp(DispSpec, "mem"); |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 210 | } else { |
| 211 | int DispVal = DispSpec.getImmedValue(); |
| 212 | if (DispVal || (!BaseReg.getReg() && !IndexReg.getReg())) { |
| 213 | if (NeedPlus) |
| 214 | if (DispVal > 0) |
| 215 | O << " + "; |
| 216 | else { |
| 217 | O << " - "; |
| 218 | DispVal = -DispVal; |
| 219 | } |
| 220 | O << DispVal; |
| 221 | } |
| 222 | } |
| 223 | O << "]"; |
| 224 | } |
| 225 | |
Evan Cheng | 7ccced6 | 2006-02-18 00:15:05 +0000 | [diff] [blame] | 226 | void X86IntelAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) { |
| 227 | O << "\"L" << getFunctionNumber() << "$pb\"\n"; |
| 228 | O << "\"L" << getFunctionNumber() << "$pb\":"; |
| 229 | } |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 230 | |
Evan Cheng | 55c25f2 | 2006-04-28 23:19:39 +0000 | [diff] [blame] | 231 | bool X86IntelAsmPrinter::printAsmMRegister(const MachineOperand &MO, |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 232 | const char Mode) { |
| 233 | const MRegisterInfo &RI = *TM.getRegisterInfo(); |
| 234 | unsigned Reg = MO.getReg(); |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 235 | switch (Mode) { |
| 236 | default: return true; // Unknown mode. |
| 237 | case 'b': // Print QImode register |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 238 | Reg = getX86SubSuperRegister(Reg, MVT::i8); |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 239 | break; |
| 240 | case 'h': // Print QImode high register |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 241 | Reg = getX86SubSuperRegister(Reg, MVT::i8, true); |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 242 | break; |
| 243 | case 'w': // Print HImode register |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 244 | Reg = getX86SubSuperRegister(Reg, MVT::i16); |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 245 | break; |
| 246 | case 'k': // Print SImode register |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 247 | Reg = getX86SubSuperRegister(Reg, MVT::i32); |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 248 | break; |
| 249 | } |
| 250 | |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 251 | O << '%' << RI.get(Reg).Name; |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 252 | return false; |
| 253 | } |
| 254 | |
Evan Cheng | 3d48a90 | 2006-04-28 21:19:05 +0000 | [diff] [blame] | 255 | /// PrintAsmOperand - Print out an operand for an inline asm expression. |
| 256 | /// |
| 257 | bool X86IntelAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, |
| 258 | unsigned AsmVariant, |
| 259 | const char *ExtraCode) { |
| 260 | // Does this asm operand have a single letter operand modifier? |
| 261 | if (ExtraCode && ExtraCode[0]) { |
| 262 | if (ExtraCode[1] != 0) return true; // Unknown modifier. |
| 263 | |
| 264 | switch (ExtraCode[0]) { |
| 265 | default: return true; // Unknown modifier. |
Evan Cheng | 62f2700 | 2006-04-28 23:11:40 +0000 | [diff] [blame] | 266 | case 'b': // Print QImode register |
| 267 | case 'h': // Print QImode high register |
| 268 | case 'w': // Print HImode register |
| 269 | case 'k': // Print SImode register |
Evan Cheng | 55c25f2 | 2006-04-28 23:19:39 +0000 | [diff] [blame] | 270 | return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]); |
Evan Cheng | 3d48a90 | 2006-04-28 21:19:05 +0000 | [diff] [blame] | 271 | } |
| 272 | } |
| 273 | |
| 274 | printOperand(MI, OpNo); |
| 275 | return false; |
| 276 | } |
| 277 | |
| 278 | bool X86IntelAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, |
| 279 | unsigned OpNo, |
| 280 | unsigned AsmVariant, |
| 281 | const char *ExtraCode) { |
| 282 | if (ExtraCode && ExtraCode[0]) |
| 283 | return true; // Unknown modifier. |
| 284 | printMemReference(MI, OpNo); |
| 285 | return false; |
| 286 | } |
| 287 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 288 | /// printMachineInstruction -- Print out a single X86 LLVM instruction |
| 289 | /// MI in Intel syntax to the current output stream. |
| 290 | /// |
| 291 | void X86IntelAsmPrinter::printMachineInstruction(const MachineInstr *MI) { |
| 292 | ++EmittedInsts; |
| 293 | |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 294 | // See if a truncate instruction can be turned into a nop. |
| 295 | switch (MI->getOpcode()) { |
| 296 | default: break; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 297 | case X86::TRUNC_64to32: |
| 298 | case X86::TRUNC_64to16: |
| 299 | case X86::TRUNC_32to16: |
| 300 | case X86::TRUNC_32to8: |
| 301 | case X86::TRUNC_16to8: |
| 302 | case X86::TRUNC_32_to8: |
| 303 | case X86::TRUNC_16_to8: { |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 304 | const MachineOperand &MO0 = MI->getOperand(0); |
| 305 | const MachineOperand &MO1 = MI->getOperand(1); |
| 306 | unsigned Reg0 = MO0.getReg(); |
| 307 | unsigned Reg1 = MO1.getReg(); |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 308 | unsigned Opc = MI->getOpcode(); |
| 309 | if (Opc == X86::TRUNC_64to32) |
| 310 | Reg1 = getX86SubSuperRegister(Reg1, MVT::i32); |
| 311 | else if (Opc == X86::TRUNC_32to16 || Opc == X86::TRUNC_64to16) |
Evan Cheng | 403be7e | 2006-05-08 08:01:26 +0000 | [diff] [blame] | 312 | Reg1 = getX86SubSuperRegister(Reg1, MVT::i16); |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 313 | else |
Evan Cheng | 403be7e | 2006-05-08 08:01:26 +0000 | [diff] [blame] | 314 | Reg1 = getX86SubSuperRegister(Reg1, MVT::i8); |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 315 | O << TAI->getCommentString() << " TRUNCATE "; |
Evan Cheng | 403be7e | 2006-05-08 08:01:26 +0000 | [diff] [blame] | 316 | if (Reg0 != Reg1) |
| 317 | O << "\n\t"; |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 318 | break; |
| 319 | } |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 320 | case X86::PsMOVZX64rr32: |
| 321 | O << TAI->getCommentString() << " ZERO-EXTEND " << "\n\t"; |
| 322 | break; |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 323 | } |
| 324 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 325 | // Call the autogenerated instruction printer routines. |
| 326 | printInstruction(MI); |
| 327 | } |
| 328 | |
| 329 | bool X86IntelAsmPrinter::doInitialization(Module &M) { |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 330 | X86SharedAsmPrinter::doInitialization(M); |
Chris Lattner | dad9c5a | 2006-05-09 05:12:53 +0000 | [diff] [blame] | 331 | |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 332 | Mang->markCharUnacceptable('.'); |
Jeff Cohen | 10efcfa | 2006-05-04 16:20:22 +0000 | [diff] [blame] | 333 | |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 334 | O << "\t.686\n\t.model flat\n\n"; |
| 335 | |
| 336 | // Emit declarations for external functions. |
| 337 | for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 338 | if (I->isExternal()) { |
| 339 | std::string Name = Mang->getValueName(I); |
| 340 | X86SharedAsmPrinter::decorateName(Name, I); |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 341 | |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 342 | O << "\textern " ; |
| 343 | if (I->hasDLLImportLinkage()) { |
| 344 | O << "__imp_"; |
| 345 | } |
| 346 | O << Name << ":near\n"; |
| 347 | } |
| 348 | |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 349 | // Emit declarations for external globals. Note that VC++ always declares |
| 350 | // external globals to have type byte, and if that's good enough for VC++... |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 351 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 352 | I != E; ++I) { |
Anton Korobeynikov | f824868 | 2006-09-20 22:03:51 +0000 | [diff] [blame] | 353 | if (I->isExternal()) { |
| 354 | std::string Name = Mang->getValueName(I); |
| 355 | |
| 356 | O << "\textern " ; |
| 357 | if (I->hasDLLImportLinkage()) { |
| 358 | O << "__imp_"; |
| 359 | } |
| 360 | O << Name << ":byte\n"; |
| 361 | } |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 362 | } |
| 363 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 364 | return false; |
| 365 | } |
| 366 | |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 367 | bool X86IntelAsmPrinter::doFinalization(Module &M) { |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 368 | const TargetData *TD = TM.getTargetData(); |
| 369 | |
| 370 | // Print out module-level global variables here. |
| 371 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 372 | I != E; ++I) { |
| 373 | if (I->isExternal()) continue; // External global require no code |
| 374 | |
| 375 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 376 | if (EmitSpecialLLVMGlobal(I)) |
| 377 | continue; |
| 378 | |
| 379 | std::string name = Mang->getValueName(I); |
| 380 | Constant *C = I->getInitializer(); |
| 381 | unsigned Size = TD->getTypeSize(C->getType()); |
| 382 | unsigned Align = getPreferredAlignmentLog(I); |
| 383 | bool bCustomSegment = false; |
| 384 | |
| 385 | switch (I->getLinkage()) { |
| 386 | case GlobalValue::LinkOnceLinkage: |
| 387 | case GlobalValue::WeakLinkage: |
Chris Lattner | 4632d7a | 2006-05-09 04:59:56 +0000 | [diff] [blame] | 388 | SwitchToDataSection("", 0); |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 389 | O << name << "?\tsegment common 'COMMON'\n"; |
| 390 | bCustomSegment = true; |
| 391 | // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256 |
| 392 | // are also available. |
| 393 | break; |
| 394 | case GlobalValue::AppendingLinkage: |
Chris Lattner | 4632d7a | 2006-05-09 04:59:56 +0000 | [diff] [blame] | 395 | SwitchToDataSection("", 0); |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 396 | O << name << "?\tsegment public 'DATA'\n"; |
| 397 | bCustomSegment = true; |
| 398 | // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256 |
| 399 | // are also available. |
| 400 | break; |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 401 | case GlobalValue::DLLExportLinkage: |
| 402 | DLLExportedGVs.insert(name); |
| 403 | // FALL THROUGH |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 404 | case GlobalValue::ExternalLinkage: |
| 405 | O << "\tpublic " << name << "\n"; |
| 406 | // FALL THROUGH |
| 407 | case GlobalValue::InternalLinkage: |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 408 | SwitchToDataSection(TAI->getDataSection(), I); |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 409 | break; |
| 410 | default: |
| 411 | assert(0 && "Unknown linkage type!"); |
| 412 | } |
| 413 | |
| 414 | if (!bCustomSegment) |
| 415 | EmitAlignment(Align, I); |
| 416 | |
Jim Laskey | 563321a | 2006-09-06 18:34:40 +0000 | [diff] [blame] | 417 | O << name << ":\t\t\t\t" << TAI->getCommentString() |
| 418 | << " " << I->getName() << '\n'; |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 419 | |
| 420 | EmitGlobalConstant(C); |
| 421 | |
| 422 | if (bCustomSegment) |
| 423 | O << name << "?\tends\n"; |
| 424 | } |
Anton Korobeynikov | b74ed07 | 2006-09-14 18:23:27 +0000 | [diff] [blame] | 425 | |
| 426 | // Output linker support code for dllexported globals |
| 427 | if ((DLLExportedGVs.begin() != DLLExportedGVs.end()) || |
| 428 | (DLLExportedFns.begin() != DLLExportedFns.end())) { |
| 429 | SwitchToDataSection("", 0); |
| 430 | O << "; WARNING: The following code is valid only with MASM v8.x and (possible) higher\n" |
| 431 | << "; This version of MASM is usually shipped with Microsoft Visual Studio 2005\n" |
| 432 | << "; or (possible) further versions. Unfortunately, there is no way to support\n" |
| 433 | << "; dllexported symbols in the earlier versions of MASM in fully automatic way\n\n"; |
| 434 | O << "_drectve\t segment info alias('.drectve')\n"; |
| 435 | } |
| 436 | |
| 437 | for (std::set<std::string>::iterator i = DLLExportedGVs.begin(), |
| 438 | e = DLLExportedGVs.end(); |
| 439 | i != e; ++i) { |
| 440 | O << "\t db ' /EXPORT:" << *i << ",data'\n"; |
| 441 | } |
| 442 | |
| 443 | for (std::set<std::string>::iterator i = DLLExportedFns.begin(), |
| 444 | e = DLLExportedFns.end(); |
| 445 | i != e; ++i) { |
| 446 | O << "\t db ' /EXPORT:" << *i << "'\n"; |
| 447 | } |
| 448 | |
| 449 | if ((DLLExportedGVs.begin() != DLLExportedGVs.end()) || |
| 450 | (DLLExportedFns.begin() != DLLExportedFns.end())) { |
| 451 | O << "_drectve\t ends\n"; |
| 452 | } |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 453 | |
| 454 | // Bypass X86SharedAsmPrinter::doFinalization(). |
| 455 | AsmPrinter::doFinalization(M); |
Chris Lattner | e7027d5 | 2006-05-09 05:15:24 +0000 | [diff] [blame] | 456 | SwitchToDataSection("", 0); |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 457 | O << "\tend\n"; |
Jeff Cohen | d43b18d | 2006-05-06 21:27:14 +0000 | [diff] [blame] | 458 | return false; // success |
Jeff Cohen | 4f1ea1e | 2006-05-02 03:11:50 +0000 | [diff] [blame] | 459 | } |
| 460 | |
Jeff Cohen | c884db4 | 2006-05-02 01:16:28 +0000 | [diff] [blame] | 461 | void X86IntelAsmPrinter::EmitString(const ConstantArray *CVA) const { |
| 462 | unsigned NumElts = CVA->getNumOperands(); |
| 463 | if (NumElts) { |
| 464 | // ML does not have escape sequences except '' for '. It also has a maximum |
| 465 | // string length of 255. |
| 466 | unsigned len = 0; |
| 467 | bool inString = false; |
| 468 | for (unsigned i = 0; i < NumElts; i++) { |
| 469 | int n = cast<ConstantInt>(CVA->getOperand(i))->getRawValue() & 255; |
| 470 | if (len == 0) |
| 471 | O << "\tdb "; |
| 472 | |
| 473 | if (n >= 32 && n <= 127) { |
| 474 | if (!inString) { |
| 475 | if (len > 0) { |
| 476 | O << ",'"; |
| 477 | len += 2; |
| 478 | } else { |
| 479 | O << "'"; |
| 480 | len++; |
| 481 | } |
| 482 | inString = true; |
| 483 | } |
| 484 | if (n == '\'') { |
| 485 | O << "'"; |
| 486 | len++; |
| 487 | } |
| 488 | O << char(n); |
| 489 | } else { |
| 490 | if (inString) { |
| 491 | O << "'"; |
| 492 | len++; |
| 493 | inString = false; |
| 494 | } |
| 495 | if (len > 0) { |
| 496 | O << ","; |
| 497 | len++; |
| 498 | } |
| 499 | O << n; |
| 500 | len += 1 + (n > 9) + (n > 99); |
| 501 | } |
| 502 | |
| 503 | if (len > 60) { |
| 504 | if (inString) { |
| 505 | O << "'"; |
| 506 | inString = false; |
| 507 | } |
| 508 | O << "\n"; |
| 509 | len = 0; |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | if (len > 0) { |
| 514 | if (inString) |
| 515 | O << "'"; |
| 516 | O << "\n"; |
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | |
Chris Lattner | b36cbd0 | 2005-07-01 22:44:09 +0000 | [diff] [blame] | 521 | // Include the auto-generated portion of the assembly writer. |
| 522 | #include "X86GenAsmWriter1.inc" |