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Added the TargetAsmLexer implementation for AT&T syntax.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94479 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sean Callanan 2010-01-26 00:08:25 +00:00
parent 6ec25f570f
commit cf2e3d108d
1 changed files with 70 additions and 5 deletions
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75
lib/Target/X86/AsmParser/X86AsmLexer.cpp
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@ -7,6 +7,7 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallVector.h"
#include "llvm/Target/TargetAsmLexer.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/MC/MCAsmInfo.h"
@ -20,11 +21,36 @@ namespace {
class X86AsmLexer : public TargetAsmLexer {
const MCAsmInfo &AsmInfo;
MCAsmLexer *Lexer;
bool tentativeIsValid;
AsmToken tentativeToken;
const AsmToken &lexTentative() {
tentativeToken = Lexer->Lex();
tentativeIsValid = true;
return tentativeToken;
}
const AsmToken &lexDefinite() {
if(tentativeIsValid) {
tentativeIsValid = false;
return tentativeToken;
}
else {
return Lexer->Lex();
}
}
AsmToken LexTokenATT();
AsmToken LexTokenIntel();
protected:
AsmToken LexToken() {
if (!Lexer) {
SetError(SMLoc(), "No MCAsmLexer installed");
return AsmToken(AsmToken::Error, "", 0);
}
switch (AsmInfo.getAssemblerDialect()) {
default:
SetError(SMLoc(), "Unhandled dialect");
@ -37,14 +63,53 @@ protected:
}
public:
X86AsmLexer(const Target &T, const MCAsmInfo &MAI)
: TargetAsmLexer(T), AsmInfo(MAI) {
: TargetAsmLexer(T), AsmInfo(MAI), Lexer(NULL), tentativeIsValid(false) {
}
void InstallLexer(MCAsmLexer &L) {
Lexer = &L;
}
};
}
static unsigned MatchRegisterName(const StringRef &Name);
AsmToken X86AsmLexer::LexTokenATT() {
return AsmToken(AsmToken::Error, "", 0);
const AsmToken &lexedToken = lexDefinite();
switch (lexedToken.getKind()) {
default:
return AsmToken(lexedToken);
case AsmToken::Error:
SetError(Lexer->getErrLoc(), Lexer->getErr());
return AsmToken(lexedToken);
case AsmToken::Percent:
{
const AsmToken &nextToken = lexTentative();
if (nextToken.getKind() == AsmToken::Identifier) {
unsigned regID = MatchRegisterName(nextToken.getString());
if (regID) {
lexDefinite();
StringRef regStr(lexedToken.getString().data(),
lexedToken.getString().size() +
nextToken.getString().size());
return AsmToken(AsmToken::Register,
regStr,
static_cast<int64_t>(regID));
}
else {
return AsmToken(lexedToken);
}
}
else {
return AsmToken(lexedToken);
}
}
}
}
AsmToken X86AsmLexer::LexTokenIntel() {
@ -56,6 +121,6 @@ extern "C" void LLVMInitializeX86AsmLexer() {
RegisterAsmLexer<X86AsmLexer> Y(TheX86_64Target);
}
//#define REGISTERS_ONLY
//#include "../X86GenAsmMatcher.inc"
//#undef REGISTERS_ONLY
#define REGISTERS_ONLY
#include "../X86GenAsmMatcher.inc"
#undef REGISTERS_ONLY