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MC/X86: Add a hack to allow recognizing 'cmpltps' and friends.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104626 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-05-25 19:49:32 +00:00
parent 86234c30a7
commit 39e2dd7bab
2 changed files with 70 additions and 1 deletions
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37
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -632,8 +632,43 @@ ParseInstruction(const StringRef &Name, SMLoc NameLoc,
.Case("cmovnzl", "cmovnel")
.Case("cmovzl", "cmovel")
.Default(Name);
// FIXME: Hack to recognize cmp<comparison code>{ss,sd,ps,pd}.
const MCExpr *ExtraImmOp = 0;
if (PatchedName.startswith("cmp") &&
(PatchedName.endswith("ss") || PatchedName.endswith("sd") ||
PatchedName.endswith("ps") || PatchedName.endswith("pd"))) {
unsigned SSEComparisonCode = StringSwitch<unsigned>(
PatchedName.slice(3, PatchedName.size() - 2))
.Case("eq", 0)
.Case("lt", 1)
.Case("le", 2)
.Case("unord", 3)
.Case("neq", 4)
.Case("nlt", 5)
.Case("nle", 6)
.Case("ord", 7)
.Default(~0U);
if (SSEComparisonCode != ~0U) {
ExtraImmOp = MCConstantExpr::Create(SSEComparisonCode,
getParser().getContext());
if (PatchedName.endswith("ss")) {
PatchedName = "cmpss";
} else if (PatchedName.endswith("sd")) {
PatchedName = "cmpsd";
} else if (PatchedName.endswith("ps")) {
PatchedName = "cmpps";
} else {
assert(PatchedName.endswith("pd") && "Unexpected mnemonic!");
PatchedName = "cmppd";
}
}
}
Operands.push_back(X86Operand::CreateToken(PatchedName, NameLoc));
if (ExtraImmOp)
Operands.push_back(X86Operand::CreateImm(ExtraImmOp, NameLoc, NameLoc));
if (getLexer().isNot(AsmToken::EndOfStatement)) {
// Parse '*' modifier.
@ -648,7 +683,7 @@ ParseInstruction(const StringRef &Name, SMLoc NameLoc,
Operands.push_back(Op);
else
return true;
while (getLexer().is(AsmToken::Comma)) {
Parser.Lex(); // Eat the comma.

34
test/MC/AsmParser/X86/x86_32-new-encoder.s
View File

@ -243,3 +243,37 @@ retl
// CHECK: cmpsd $0, (%eax), %xmm1
// CHECK: encoding: [0xf2,0x0f,0xc2,0x08,0x00]
cmpsd $0, 0(%eax), %xmm1
// Check matching of instructions which embed the SSE comparison code.
// CHECK: cmpps $0, %xmm0, %xmm1
// CHECK: encoding: [0x0f,0xc2,0xc8,0x00]
cmpeqps %xmm0, %xmm1
// CHECK: cmppd $1, %xmm0, %xmm1
// CHECK: encoding: [0x66,0x0f,0xc2,0xc8,0x01]
cmpltpd %xmm0, %xmm1
// CHECK: cmpss $2, %xmm0, %xmm1
// CHECK: encoding: [0xf3,0x0f,0xc2,0xc8,0x02]
cmpless %xmm0, %xmm1
// CHECK: cmppd $3, %xmm0, %xmm1
// CHECK: encoding: [0x66,0x0f,0xc2,0xc8,0x03]
cmpunordpd %xmm0, %xmm1
// CHECK: cmpps $4, %xmm0, %xmm1
// CHECK: encoding: [0x0f,0xc2,0xc8,0x04]
cmpneqps %xmm0, %xmm1
// CHECK: cmppd $5, %xmm0, %xmm1
// CHECK: encoding: [0x66,0x0f,0xc2,0xc8,0x05]
cmpnltpd %xmm0, %xmm1
// CHECK: cmpss $6, %xmm0, %xmm1
// CHECK: encoding: [0xf3,0x0f,0xc2,0xc8,0x06]
cmpnless %xmm0, %xmm1
// CHECK: cmpsd $7, %xmm0, %xmm1
// CHECK: encoding: [0xf2,0x0f,0xc2,0xc8,0x07]
cmpordsd %xmm0, %xmm1