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author | Chris Lattner <sabre@nondot.org> | 2004-08-01 07:43:02 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2004-08-01 07:43:02 +0000 |
commit | 076efa771aa634801202f7b8189e33ee79dfc4ed (patch) | |
tree | 461513a67cf6ea30917607c71b1bebf231b8c59a /utils/TableGen/AsmWriterEmitter.cpp | |
parent | 87c5905e0b6f551e21c9a96f1b6418920d908210 (diff) | |
download | external_llvm-076efa771aa634801202f7b8189e33ee79dfc4ed.zip external_llvm-076efa771aa634801202f7b8189e33ee79dfc4ed.tar.gz external_llvm-076efa771aa634801202f7b8189e33ee79dfc4ed.tar.bz2 |
Add support for asm printing machine instructions that have operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15391 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils/TableGen/AsmWriterEmitter.cpp')
-rw-r--r-- | utils/TableGen/AsmWriterEmitter.cpp | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp index b2cf107..319fe4f 100644 --- a/utils/TableGen/AsmWriterEmitter.cpp +++ b/utils/TableGen/AsmWriterEmitter.cpp @@ -17,6 +17,13 @@ #include <ostream> using namespace llvm; +static bool isIdentChar(char C) { + return (C >= 'a' && C <= 'z') || + (C >= 'A' && C <= 'Z') || + (C >= '0' && C <= '9') || + C == '_'; +} + void AsmWriterEmitter::run(std::ostream &O) { EmitSourceFileHeader("Assembly Writer Source Fragment", O); @@ -37,8 +44,47 @@ void AsmWriterEmitter::run(std::ostream &O) { E = Target.inst_end(); I != E; ++I) if (!I->second.AsmString.empty()) { const std::string &AsmString = I->second.AsmString; - O << " case " << Namespace << "::" << I->first << ": O << \"" - << AsmString << "\" << '\\n'; break;\n"; + O << " case " << Namespace << "::" << I->first << ": O "; + + std::string::size_type LastEmitted = 0; + while (LastEmitted != AsmString.size()) { + std::string::size_type DollarPos = AsmString.find('$', LastEmitted); + if (DollarPos == std::string::npos) DollarPos = AsmString.size(); + + // Emit a constant string fragment. + if (DollarPos != LastEmitted) { + // TODO: this should eventually handle escaping. + O << " << \"" << std::string(AsmString.begin()+LastEmitted, + AsmString.begin()+DollarPos) << "\""; + LastEmitted = DollarPos; + } else if (DollarPos+1 != AsmString.size() && + AsmString[DollarPos+1] == '$') { + O << " << '$'"; // "$$" -> $ + } else { + // Get the name of the variable. + // TODO: should eventually handle ${foo}bar as $foo + std::string::size_type VarEnd = DollarPos+1; + while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd])) + ++VarEnd; + std::string VarName(AsmString.begin()+DollarPos+1, + AsmString.begin()+VarEnd); + if (VarName.empty()) + throw "Stray '$' in '" + I->first + + "' asm string, maybe you want $$?"; + unsigned OpNo = I->second.getOperandNamed(VarName); + + // If this is a two-address instruction and we are not accessing the + // 0th operand, remove an operand. + if (I->second.isTwoAddress && OpNo != 0) + --OpNo; + + O << "; printOperand(MI->getOperand(" << OpNo << "), MVT::" + << getName(I->second.OperandList[OpNo].Ty) << "); O "; + LastEmitted = VarEnd; + } + } + + O << " << '\\n'; break;\n"; } O << " }\n" |