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Update GATHER instructions to support 2 read-write operands. Patch from myself and Manman Ren.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160110 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper
2012-07-12 06:52:41 +00:00
parent 79590b8edf
commit 5aba78bd80
7 changed files with 77 additions and 30 deletions
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19
lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp
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@@ -572,8 +572,14 @@ void X86MCCodeEmitter::EmitVEXOpcodePrefix(uint64_t TSFlags, unsigned &CurByte,
// Classify VEX_B, VEX_4V, VEX_R, VEX_X
unsigned NumOps = Desc.getNumOperands();
unsigned CurOp = 0;
if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) != -1)
if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) == 0)
++CurOp;
else if (NumOps > 3 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0) {
assert(Desc.getOperandConstraint(NumOps - 1, MCOI::TIED_TO) == 1);
// Special case for GATHER with 2 TIED_TO operands
// Skip the first 2 operands: dst, mask_wb
CurOp += 2;
}
switch (TSFlags & X86II::FormMask) {
case X86II::MRMInitReg: llvm_unreachable("FIXME: Remove this!");
@@ -971,11 +977,14 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
// FIXME: This should be handled during MCInst lowering.
unsigned NumOps = Desc.getNumOperands();
unsigned CurOp = 0;
if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) != -1)
if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) == 0)
++CurOp;
else if (NumOps > 2 && Desc.getOperandConstraint(NumOps-1, MCOI::TIED_TO)== 0)
// Skip the last source operand that is tied_to the dest reg. e.g. LXADD32
--NumOps;
else if (NumOps > 3 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0) {
assert(Desc.getOperandConstraint(NumOps - 1, MCOI::TIED_TO) == 1);
// Special case for GATHER with 2 TIED_TO operands
// Skip the first 2 operands: dst, mask_wb
CurOp += 2;
}
// Keep track of the current byte being emitted.
unsigned CurByte = 0;