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X86: Decode PALIGN operands so I don't have to do it in my head. 

llvm-svn: 173572
This commit is contained in:
Benjamin Kramer 2013-01-26 13:31:37 +00:00
parent 675911d99c
commit 6a93596538
5 changed files with 67 additions and 1 deletions
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22
llvm/lib/Target/X86/InstPrinter/X86InstComments.cpp
View File

@ -69,6 +69,28 @@ void llvm::EmitAnyX86InstComments(const MCInst *MI, raw_ostream &OS,
DecodeMOVHLPSMask(2, ShuffleMask);
break;
case X86::PALIGNR128rr:
case X86::VPALIGNR128rr:
Src1Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PALIGNR128rm:
case X86::VPALIGNR128rm:
Src2Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodePALIGNMask(MVT::v16i8,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::VPALIGNR256rr:
Src1Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPALIGNR256rm:
Src2Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodePALIGNMask(MVT::v32i8,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
case X86::PSHUFDri:
case X86::VPSHUFDri:
Src1Name = getRegName(MI->getOperand(1).getReg());

8
llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp
View File

@ -61,6 +61,14 @@ void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) {
ShuffleMask.push_back(NElts+i);
}
void DecodePALIGNMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
unsigned NumElts = VT.getVectorNumElements();
unsigned Offset = Imm * (VT.getVectorElementType().getSizeInBits() / 8);
for (unsigned i = 0; i != NumElts; ++i)
ShuffleMask.push_back((i + Offset) % (NumElts * 2));
}
/// DecodePSHUFMask - This decodes the shuffle masks for pshufd, and vpermilp*.
/// VT indicates the type of the vector allowing it to handle different
/// datatypes and vector widths.

2
llvm/lib/Target/X86/Utils/X86ShuffleDecode.h
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@ -35,6 +35,8 @@ void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
// <0,2> or <0,1,4,5>
void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
void DecodePALIGNMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);

5
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -4592,6 +4592,10 @@ static bool getTargetShuffleMask(SDNode *N, MVT VT,
case X86ISD::MOVLHPS:
DecodeMOVLHPSMask(NumElems, Mask);
break;
case X86ISD::PALIGN:
ImmN = N->getOperand(N->getNumOperands()-1);
DecodePALIGNMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
break;
case X86ISD::PSHUFD:
case X86ISD::VPERMILP:
ImmN = N->getOperand(N->getNumOperands()-1);
@ -4635,7 +4639,6 @@ static bool getTargetShuffleMask(SDNode *N, MVT VT,
case X86ISD::MOVLPS:
case X86ISD::MOVSHDUP:
case X86ISD::MOVSLDUP:
case X86ISD::PALIGN:
// Not yet implemented
return false;
default: llvm_unreachable("unknown target shuffle node");

31
llvm/test/MC/X86/shuffle-comments.s Normal file
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@ -0,0 +1,31 @@
# RUN: llvm-mc %s -triple=x86_64-unknown-unknown | FileCheck %s
palignr $8, %xmm0, %xmm1
# CHECK: xmm1 = xmm0[8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7]
palignr $8, (%rax), %xmm1
# CHECK: xmm1 = mem[8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7]
palignr $16, %xmm0, %xmm1
# CHECK: xmm1 = xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
palignr $16, (%rax), %xmm1
# CHECK: xmm1 = xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
palignr $0, %xmm0, %xmm1
# CHECK: xmm1 = xmm0[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
palignr $0, (%rax), %xmm1
# CHECK: xmm1 = mem[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
vpalignr $8, %xmm0, %xmm1, %xmm2
# CHECK: xmm2 = xmm0[8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7]
vpalignr $8, (%rax), %xmm1, %xmm2
# CHECK: xmm2 = mem[8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7]
vpalignr $16, %xmm0, %xmm1, %xmm2
# CHECK: xmm2 = xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
vpalignr $16, (%rax), %xmm1, %xmm2
# CHECK: xmm2 = xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
vpalignr $0, %xmm0, %xmm1, %xmm2
# CHECK: xmm2 = xmm0[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
vpalignr $0, (%rax), %xmm1, %xmm2
# CHECK: xmm2 = mem[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]