Displaying 1 result from an estimated 1 matches for "sdtvecshuffle".
2010 Aug 04
2
[LLVMdev] x86 Vector Shuffle Patterns
..._shuffle node:$lhs, node:$rhs), [{
return X86::isSHUFPMask(cast<ShuffleVectorSDNode>(N));
}], SHUFFLE_get_shuf_imm>;
First off, why does the vector_shuffle pattern take only two operands?
I understand that the VECTOR_SHUFFLE node has three operands but
vector_shuffle is defined as:
def SDTVecShuffle : SDTypeProfile<1, 2, [
SDTCisSameAs<0, 1>, SDTCisSameAs<1, 2>
]>;
def vector_shuffle : SDNode<"ISD::VECTOR_SHUFFLE", SDTVecShuffle, []>;
So the pattern match is against the two input vectors, excluding the
shuffle mask. Why is this?
In the SHUFPS above the s...