diff options
Diffstat (limited to 'contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp b/contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp index 9a95150cb557..267d716dd1d0 100644 --- a/contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp +++ b/contrib/llvm/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp @@ -110,14 +110,22 @@ void WebAssemblyInstPrinter::printInst(const MCInst *MI, raw_ostream &OS, } static std::string toString(const APFloat &FP) { + // Print NaNs with custom payloads specially. + if (FP.isNaN() && + !FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics())) && + !FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics(), /*Negative=*/true))) { + APInt AI = FP.bitcastToAPInt(); + return + std::string(AI.isNegative() ? "-" : "") + "nan:0x" + + utohexstr(AI.getZExtValue() & + (AI.getBitWidth() == 32 ? INT64_C(0x007fffff) : + INT64_C(0x000fffffffffffff)), + /*LowerCase=*/true); + } + + // Use C99's hexadecimal floating-point representation. static const size_t BufBytes = 128; char buf[BufBytes]; - if (FP.isNaN()) - assert((FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics())) || - FP.bitwiseIsEqual( - APFloat::getQNaN(FP.getSemantics(), /*Negative=*/true))) && - "convertToHexString handles neither SNaN nor NaN payloads"); - // Use C99's hexadecimal floating-point representation. auto Written = FP.convertToHexString( buf, /*hexDigits=*/0, /*upperCase=*/false, APFloat::rmNearestTiesToEven); (void)Written; @@ -137,11 +145,11 @@ void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo, if (int(WAReg) >= 0) printRegName(O, WAReg); else if (OpNo >= MII.get(MI->getOpcode()).getNumDefs()) - O << "$pop" << (WAReg & INT32_MAX); + O << "$pop" << WebAssemblyFunctionInfo::getWARegStackId(WAReg); else if (WAReg != WebAssemblyFunctionInfo::UnusedReg) - O << "$push" << (WAReg & INT32_MAX); + O << "$push" << WebAssemblyFunctionInfo::getWARegStackId(WAReg); else - O << "$discard"; + O << "$drop"; // Add a '=' suffix if this is a def. if (OpNo < MII.get(MI->getOpcode()).getNumDefs()) O << '='; @@ -157,10 +165,20 @@ void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo, // control flow stack, and it may be nice to pretty-print. O << Op.getImm(); } else if (Op.isFPImm()) { - assert((OpNo < MII.get(MI->getOpcode()).getNumOperands() || - MII.get(MI->getOpcode()).TSFlags == 0) && + const MCInstrDesc &Desc = MII.get(MI->getOpcode()); + assert(OpNo < Desc.getNumOperands() && + "Unexpected floating-point immediate as a non-fixed operand"); + assert(Desc.TSFlags == 0 && "WebAssembly variable_ops floating point ops don't use TSFlags"); - O << toString(APFloat(Op.getFPImm())); + const MCOperandInfo &Info = Desc.OpInfo[OpNo]; + if (Info.OperandType == WebAssembly::OPERAND_FP32IMM) { + // TODO: MC converts all floating point immediate operands to double. + // This is fine for numeric values, but may cause NaNs to change bits. + O << toString(APFloat(float(Op.getFPImm()))); + } else { + assert(Info.OperandType == WebAssembly::OPERAND_FP64IMM); + O << toString(APFloat(Op.getFPImm())); + } } else { assert((OpNo < MII.get(MI->getOpcode()).getNumOperands() || (MII.get(MI->getOpcode()).TSFlags & @@ -172,6 +190,16 @@ void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo, } } +void +WebAssemblyInstPrinter::printWebAssemblyP2AlignOperand(const MCInst *MI, + unsigned OpNo, + raw_ostream &O) { + int64_t Imm = MI->getOperand(OpNo).getImm(); + if (Imm == WebAssembly::GetDefaultP2Align(MI->getOpcode())) + return; + O << ":p2align=" << Imm; +} + const char *llvm::WebAssembly::TypeToString(MVT Ty) { switch (Ty.SimpleTy) { case MVT::i32: |