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Add a WriteMicrocoded for ancient microcoded instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-03-21 00:07:17 +00:00
parent 00c5c5d467
commit c1ea2c5d6d
2 changed files with 7 additions and 0 deletions
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4
lib/Target/X86/X86InstrInfo.td
View File

@ -1513,6 +1513,7 @@ def CLTS : I<0x06, RawFrm, (outs), (ins), "clts", [], IIC_CLTS>, TB;
// Table lookup instructions
def XLAT : I<0xD7, RawFrm, (outs), (ins), "xlatb", [], IIC_XLAT>;
let SchedRW = [WriteMicrocoded] in {
// ASCII Adjust After Addition
// sets AL, AH and CF and AF of EFLAGS and uses AL and AF of EFLAGS
def AAA : I<0x37, RawFrm, (outs), (ins), "aaa", [], IIC_AAA>,
@ -1542,7 +1543,9 @@ def DAA : I<0x27, RawFrm, (outs), (ins), "daa", [], IIC_DAA>,
// sets AL, CF and AF of EFLAGS and uses AL, CF and AF of EFLAGS
def DAS : I<0x2F, RawFrm, (outs), (ins), "das", [], IIC_DAS>,
Requires<[In32BitMode]>;
} // SchedRW
let SchedRW = [WriteSystem] in {
// Check Array Index Against Bounds
def BOUNDS16rm : I<0x62, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$src),
"bound\t{$src, $dst|$dst, $src}", [], IIC_BOUND>, OpSize,
@ -1558,6 +1561,7 @@ def ARPL16rr : I<0x63, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
def ARPL16mr : I<0x63, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
"arpl\t{$src, $dst|$dst, $src}", [], IIC_ARPL_MEM>,
Requires<[In32BitMode]>;
} // SchedRW
//===----------------------------------------------------------------------===//
// MOVBE Instructions

3
lib/Target/X86/X86Schedule.td
View File

@ -86,6 +86,9 @@ defm WriteCvtF2F : X86SchedWritePair; // Float -> Float size conversion.
// Catch-all for expensive system instructions.
def WriteSystem : SchedWrite;
// Old microcoded instructions that nobody use.
def WriteMicrocoded : SchedWrite;
//===----------------------------------------------------------------------===//
// Instruction Itinerary classes used for X86
def IIC_DEFAULT : InstrItinClass;