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Move decoding of insertps back to avoid unused warnings in x86 isel lowering, and fix movlhps/movhlps to decode 4 elements shuffles

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112869 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes 2010-09-02 21:51:11 +00:00
parent 3f74a116c8
commit 5594560766
2 changed files with 44 additions and 30 deletions
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32
lib/Target/X86/AsmPrinter/X86InstComments.cpp
View File

@ -19,6 +19,34 @@
#include "../X86ShuffleDecode.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// Vector Mask Decoding for non-shuffles
//===----------------------------------------------------------------------===//
static void DecodeINSERTPSMask(unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask) {
// Defaults the copying the dest value.
ShuffleMask.push_back(0);
ShuffleMask.push_back(1);
ShuffleMask.push_back(2);
ShuffleMask.push_back(3);
// Decode the immediate.
unsigned ZMask = Imm & 15;
unsigned CountD = (Imm >> 4) & 3;
unsigned CountS = (Imm >> 6) & 3;
// CountS selects which input element to use.
unsigned InVal = 4+CountS;
// CountD specifies which element of destination to update.
ShuffleMask[CountD] = InVal;
// ZMask zaps values, potentially overriding the CountD elt.
if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;
if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;
if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;
if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;
}
//===----------------------------------------------------------------------===//
// Top Level Entrypoint
//===----------------------------------------------------------------------===//
@ -42,13 +70,13 @@ void llvm::EmitAnyX86InstComments(const MCInst *MI, raw_ostream &OS,
case X86::MOVLHPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
Src1Name = getRegName(MI->getOperand(0).getReg());
DecodeMOVLHPSMask(ShuffleMask);
DecodeMOVLHPSMask(2, ShuffleMask);
break;
case X86::MOVHLPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
Src1Name = getRegName(MI->getOperand(0).getReg());
DecodeMOVHLPSMask(ShuffleMask);
DecodeMOVHLPSMask(2, ShuffleMask);
break;
case X86::PSHUFDri:

42
lib/Target/X86/X86ShuffleDecode.h
View File

@ -26,38 +26,24 @@ enum {
SM_SentinelZero = ~0U
};
static void DecodeINSERTPSMask(unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask) {
// Defaults the copying the dest value.
ShuffleMask.push_back(0);
ShuffleMask.push_back(1);
ShuffleMask.push_back(2);
ShuffleMask.push_back(3);
// <3,1> or <6,7,2,3>
static void DecodeMOVHLPSMask(unsigned NElts,
SmallVectorImpl<unsigned> &ShuffleMask) {
for (unsigned i = NElts/2; i != NElts; ++i)
ShuffleMask.push_back(NElts+i);
// Decode the immediate.
unsigned ZMask = Imm & 15;
unsigned CountD = (Imm >> 4) & 3;
unsigned CountS = (Imm >> 6) & 3;
// CountS selects which input element to use.
unsigned InVal = 4+CountS;
// CountD specifies which element of destination to update.
ShuffleMask[CountD] = InVal;
// ZMask zaps values, potentially overriding the CountD elt.
if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;
if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;
if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;
if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;
for (unsigned i = NElts/2; i != NElts; ++i)
ShuffleMask.push_back(i);
}
static void DecodeMOVHLPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
ShuffleMask.push_back(3);
ShuffleMask.push_back(1);
}
// <0,2> or <0,1,4,5>
static void DecodeMOVLHPSMask(unsigned NElts,
SmallVectorImpl<unsigned> &ShuffleMask) {
for (unsigned i = 0; i != NElts/2; ++i)
ShuffleMask.push_back(i);
static void DecodeMOVLHPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
ShuffleMask.push_back(0);
ShuffleMask.push_back(2);
for (unsigned i = 0; i != NElts/2; ++i)
ShuffleMask.push_back(NElts+i);
}
static void DecodePSHUFMask(unsigned NElts, unsigned Imm,