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All v2f64 shuffle cases can be handled. 

llvm-svn: 27044
This commit is contained in:
Evan Cheng 2006-03-24 06:40:32 +00:00
parent 2204bc276d
commit a91d8a5b43
2 changed files with 8 additions and 1 deletions
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4
llvm/lib/Target/X86/README.txt
View File

@ -655,3 +655,7 @@ call _foo
Obviously it would have been better for the first mov (or any op) to store Obviously it would have been better for the first mov (or any op) to store
directly %esp[0] if there are no other uses. directly %esp[0] if there are no other uses.
//===---------------------------------------------------------------------===//
Add more vector shuffle special cases using unpckhps and unpcklps.

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

@ -2329,7 +2329,10 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
DAG.getNode(ISD::UNDEF, V1.getValueType()), DAG.getNode(ISD::UNDEF, V1.getValueType()),
PermMask); PermMask);
} else if (NumElems == 2 || X86::isSHUFPMask(PermMask.Val)) { } else if (NumElems == 2) {
// All v2f64 cases are handled.
return SDOperand();
} else if (X86::isSHUFPMask(PermMask.Val)) {
SDOperand Elt = PermMask.getOperand(0); SDOperand Elt = PermMask.getOperand(0);
if (cast<ConstantSDNode>(Elt)->getValue() >= NumElems) { if (cast<ConstantSDNode>(Elt)->getValue() >= NumElems) {
// Swap the operands and change mask. // Swap the operands and change mask.