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move the plethora of fp stack aliases to the .td file.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118353 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-11-06 20:47:38 +00:00
parent 90fd797dc7
commit 3af0e7d5cd
2 changed files with 48 additions and 39 deletions
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32
lib/Target/X86/AsmParser/X86AsmParser.cpp
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@@ -797,38 +797,6 @@ ParseInstruction(StringRef Name, SMLoc NameLoc,
X86Operand::CreateImm(One, NameLoc, NameLoc));
}
// FIXME: Hack to handle "f{mul*,add*,sub*,div*} $op, st(0)" the same as
// "f{mul*,add*,sub*,div*} $op"
if ((Name.startswith("fmul") || Name.startswith("fadd") ||
Name.startswith("fsub") || Name.startswith("fdiv")) &&
Operands.size() == 3 &&
static_cast<X86Operand*>(Operands[2])->isReg() &&
static_cast<X86Operand*>(Operands[2])->getReg() == X86::ST0) {
delete Operands[2];
Operands.erase(Operands.begin() + 2);
}
// FIXME: Hack to handle "f{mulp,addp} st(0), $op" the same as
// "f{mulp,addp} $op", since they commute. We also allow fdivrp/fsubrp even
// though they don't commute, solely because gas does support this.
if ((Name=="fmulp" || Name=="faddp" || Name=="fsubrp" || Name=="fdivrp") &&
Operands.size() == 3 &&
static_cast<X86Operand*>(Operands[1])->isReg() &&
static_cast<X86Operand*>(Operands[1])->getReg() == X86::ST0) {
delete Operands[1];
Operands.erase(Operands.begin() + 1);
}
// The assembler accepts these instructions with no operand as a synonym for
// an instruction acting on st(1). e.g. "fxch" -> "fxch %st(1)".
if ((Name == "fxch" ||
Name == "faddp" || Name == "fsubp" || Name == "fsubrp" ||
Name == "fmulp" || Name == "fdivp" || Name == "fdivrp") &&
Operands.size() == 1) {
Operands.push_back(X86Operand::CreateReg(MatchRegisterName("st(1)"),
NameLoc, NameLoc));
}
return false;
}