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PPC: [turbofan] Turn Math.clz32 into an inlinable builtin.

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Port 3aa206b865

Original commit message:
R=dcarney@chromium.org, yangguo@chromium.org
BUG=v8:3952
LOG=n

R=mbrandy@us.ibm.com, svenpanne@chromium.org, danno@chromium.org, jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1028313003

Cr-Commit-Position: refs/heads/master@{#27391}
This commit is contained in:
michael_dawson 2015-03-24 02:31:32 -07:00 committed by Commit bot
parent 833364a7de
commit b051c7aabe
3 changed files with 11 additions and 0 deletions
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4
src/compiler/ppc/code-generator-ppc.cc
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@ -839,6 +839,10 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
case kPPC_NegFloat64:
ASSEMBLE_FLOAT_UNOP_RC(fneg);
break;
case kPPC_Cntlz32:
__ cntlzw_(i.OutputRegister(), i.InputRegister(0));
DCHECK_EQ(LeaveRC, i.OutputRCBit());
break;
case kPPC_Cmp32:
ASSEMBLE_COMPARE(cmpw, cmplw);
break;

1
src/compiler/ppc/instruction-codes-ppc.h
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@ -69,6 +69,7 @@ namespace compiler {
V(PPC_RoundFloat64) \
V(PPC_MaxFloat64) \
V(PPC_MinFloat64) \
V(PPC_Cntlz32) \
V(PPC_Cmp32) \
V(PPC_Cmp64) \
V(PPC_CmpFloat64) \

6
src/compiler/ppc/instruction-selector-ppc.cc
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@ -737,6 +737,12 @@ void InstructionSelector::VisitWord64Ror(Node* node) {
#endif
void InstructionSelector::VisitWord32Clz(Node* node) {
PPCOperandGenerator g(this);
Emit(kPPC_Cntlz32, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
}
void InstructionSelector::VisitInt32Add(Node* node) {
VisitBinop<Int32BinopMatcher>(this, node, kPPC_Add32, kInt16Imm);
}