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move the "sh[lr]d op,op" -> "shld $1, op,op" aliases to the .td file. 

llvm-svn: 118361
This commit is contained in:
Chris Lattner 2010-11-06 22:25:39 +00:00
parent b884a8ee44
commit 7923358842
2 changed files with 18 additions and 10 deletions
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8
llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -783,14 +783,6 @@ ParseInstruction(StringRef Name, SMLoc NameLoc,
}
}
// FIXME: Hack to handle recognize "sh[lr]d op,op" -> "shld $1, op,op".
if ((Name.startswith("shld") || Name.startswith("shrd")) &&
Operands.size() == 3) {
const MCExpr *One = MCConstantExpr::Create(1, getParser().getContext());
Operands.insert(Operands.begin()+1,
X86Operand::CreateImm(One, NameLoc, NameLoc));
}
return false;
}

20
llvm/lib/Target/X86/X86InstrInfo.td
View File

@ -1504,7 +1504,23 @@ def : InstAlias<"outl $port", (OUT32ir i8imm:$port)>;
// errors, since its encoding is the most compact.
def : InstAlias<"sldt $mem", (SLDT16m i16mem:$mem)>;
/*
// shld/shrd op,op -> shld op, op, 1
def : InstAlias<"shldw $r1, $r2", (SHLD16rri8 GR16:$r1, GR16:$r2, 1)>;
def : InstAlias<"shldl $r1, $r2", (SHLD32rri8 GR32:$r1, GR32:$r2, 1)>;
def : InstAlias<"shldq $r1, $r2", (SHLD64rri8 GR64:$r1, GR64:$r2, 1)>;
def : InstAlias<"shrdw $r1, $r2", (SHRD16rri8 GR16:$r1, GR16:$r2, 1)>;
def : InstAlias<"shrdl $r1, $r2", (SHRD32rri8 GR32:$r1, GR32:$r2, 1)>;
def : InstAlias<"shrdq $r1, $r2", (SHRD64rri8 GR64:$r1, GR64:$r2, 1)>;
def : InstAlias<"shldw $mem, $reg", (SHLD16mri8 i16mem:$mem, GR16:$reg, 1)>;
def : InstAlias<"shldl $mem, $reg", (SHLD32mri8 i32mem:$mem, GR32:$reg, 1)>;
def : InstAlias<"shldq $mem, $reg", (SHLD64mri8 i64mem:$mem, GR64:$reg, 1)>;
def : InstAlias<"shrdw $mem, $reg", (SHRD16mri8 i16mem:$mem, GR16:$reg, 1)>;
def : InstAlias<"shrdl $mem, $reg", (SHRD32mri8 i32mem:$mem, GR32:$reg, 1)>;
def : InstAlias<"shrdq $mem, $reg", (SHRD64mri8 i64mem:$mem, GR64:$reg, 1)>;
/* FIXME: This is disabled because the asm matcher is currently incapable of
* matching a fixed immediate like $1.
// "shl X, $1" is an alias for "shl X".
multiclass ShiftRotateByOneAlias<string Mnemonic, string Opc> {
def : InstAlias<!strconcat(Mnemonic, "b $op, $$1"),
@ -1529,7 +1545,7 @@ defm : ShiftRotateByOneAlias<"rcl", "RCL">;
defm : ShiftRotateByOneAlias<"rcr", "RCR">;
defm : ShiftRotateByOneAlias<"rol", "ROL">;
defm : ShiftRotateByOneAlias<"ror", "ROR">;
*/
FIXME */
// test: We accept "testX <reg>, <mem>" and "testX <mem>, <reg>" as synonyms.
def : InstAlias<"testb $val, $mem", (TEST8rm GR8 :$val, i8mem :$mem)>;