diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 70 |
1 files changed, 44 insertions, 26 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index bd74a09a876..4e95e964097 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -852,14 +852,26 @@ static bool isConstantOrUndef(int Op, int Val) { /// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a /// VPKUHUM instruction. -bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, bool isUnary, +/// The ShuffleKind distinguishes between big-endian operations with +/// two different inputs (0), either-endian operations with two identical +/// inputs (1), and little-endian operantion with two different inputs (2). +/// For the latter, the input operands are swapped (see PPCInstrAltivec.td). +bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, SelectionDAG &DAG) { - unsigned j = DAG.getTarget().getDataLayout()->isLittleEndian() ? 0 : 1; - if (!isUnary) { + if (ShuffleKind == 0) { + if (DAG.getTarget().getDataLayout()->isLittleEndian()) + return false; for (unsigned i = 0; i != 16; ++i) - if (!isConstantOrUndef(N->getMaskElt(i), i*2+j)) + if (!isConstantOrUndef(N->getMaskElt(i), i*2+1)) return false; - } else { + } else if (ShuffleKind == 2) { + if (!DAG.getTarget().getDataLayout()->isLittleEndian()) + return false; + for (unsigned i = 0; i != 16; ++i) + if (!isConstantOrUndef(N->getMaskElt(i), i*2)) + return false; + } else if (ShuffleKind == 1) { + unsigned j = DAG.getTarget().getDataLayout()->isLittleEndian() ? 0 : 1; for (unsigned i = 0; i != 8; ++i) if (!isConstantOrUndef(N->getMaskElt(i), i*2+j) || !isConstantOrUndef(N->getMaskElt(i+8), i*2+j)) @@ -870,27 +882,33 @@ bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, bool isUnary, /// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a /// VPKUWUM instruction. -bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, bool isUnary, +/// The ShuffleKind distinguishes between big-endian operations with +/// two different inputs (0), either-endian operations with two identical +/// inputs (1), and little-endian operantion with two different inputs (2). +/// For the latter, the input operands are swapped (see PPCInstrAltivec.td). +bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, SelectionDAG &DAG) { - unsigned j, k; - if (DAG.getTarget().getDataLayout()->isLittleEndian()) { - j = 0; - k = 1; - } else { - j = 2; - k = 3; - } - if (!isUnary) { + if (ShuffleKind == 0) { + if (DAG.getTarget().getDataLayout()->isLittleEndian()) + return false; for (unsigned i = 0; i != 16; i += 2) - if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) || - !isConstantOrUndef(N->getMaskElt(i+1), i*2+k)) + if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) || + !isConstantOrUndef(N->getMaskElt(i+1), i*2+3)) return false; - } else { + } else if (ShuffleKind == 2) { + if (!DAG.getTarget().getDataLayout()->isLittleEndian()) + return false; + for (unsigned i = 0; i != 16; i += 2) + if (!isConstantOrUndef(N->getMaskElt(i ), i*2) || + !isConstantOrUndef(N->getMaskElt(i+1), i*2+1)) + return false; + } else if (ShuffleKind == 1) { + unsigned j = DAG.getTarget().getDataLayout()->isLittleEndian() ? 0 : 2; for (unsigned i = 0; i != 8; i += 2) - if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) || - !isConstantOrUndef(N->getMaskElt(i+1), i*2+k) || - !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) || - !isConstantOrUndef(N->getMaskElt(i+9), i*2+k)) + if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) || + !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) || + !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) || + !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1)) return false; } return true; @@ -6044,8 +6062,8 @@ SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, if (PPC::isSplatShuffleMask(SVOp, 1) || PPC::isSplatShuffleMask(SVOp, 2) || PPC::isSplatShuffleMask(SVOp, 4) || - PPC::isVPKUWUMShuffleMask(SVOp, true, DAG) || - PPC::isVPKUHUMShuffleMask(SVOp, true, DAG) || + PPC::isVPKUWUMShuffleMask(SVOp, 1, DAG) || + PPC::isVPKUHUMShuffleMask(SVOp, 1, DAG) || PPC::isVSLDOIShuffleMask(SVOp, true, DAG) != -1 || PPC::isVMRGLShuffleMask(SVOp, 1, 1, DAG) || PPC::isVMRGLShuffleMask(SVOp, 2, 1, DAG) || @@ -6061,8 +6079,8 @@ SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, // and produce a fixed permutation. If any of these match, do not lower to // VPERM. unsigned int ShuffleKind = isLittleEndian ? 2 : 0; - if (PPC::isVPKUWUMShuffleMask(SVOp, false, DAG) || - PPC::isVPKUHUMShuffleMask(SVOp, false, DAG) || + if (PPC::isVPKUWUMShuffleMask(SVOp, ShuffleKind, DAG) || + PPC::isVPKUHUMShuffleMask(SVOp, ShuffleKind, DAG) || PPC::isVSLDOIShuffleMask(SVOp, false, DAG) != -1 || PPC::isVMRGLShuffleMask(SVOp, 1, ShuffleKind, DAG) || PPC::isVMRGLShuffleMask(SVOp, 2, ShuffleKind, DAG) || |
