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PPC: [turbofan] Add new Float32Abs and Float64Abs operators.

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Port 9af9f1d026

Original commit message:
These operators compute the absolute floating point value of some
arbitrary input, and are implemented without any branches (i.e. using
vabs on arm, and andps/andpd on x86).

R=mbrandy@us.ibm.com

BUG=

Review URL: https://codereview.chromium.org/1072963002

Cr-Commit-Position: refs/heads/master@{#27727}
This commit is contained in:
michael_dawson 2015-04-09 15:29:25 -07:00 committed by Commit bot
parent 5110b400bf
commit c00de38657
3 changed files with 13 additions and 3 deletions
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3
src/compiler/ppc/code-generator-ppc.cc
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@ -857,6 +857,9 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
case kPPC_MinDouble:
ASSEMBLE_FLOAT_MIN(kScratchDoubleReg);
break;
case kPPC_AbsDouble:
ASSEMBLE_FLOAT_UNOP_RC(fabs);
break;
case kPPC_SqrtDouble:
ASSEMBLE_FLOAT_UNOP_RC(fsqrt);
break;

1
src/compiler/ppc/instruction-codes-ppc.h
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@ -60,6 +60,7 @@ namespace compiler {
V(PPC_RoundDouble) \
V(PPC_MaxDouble) \
V(PPC_MinDouble) \
V(PPC_AbsDouble) \
V(PPC_Cntlz32) \
V(PPC_Cmp32) \
V(PPC_Cmp64) \

12
src/compiler/ppc/instruction-selector-ppc.cc
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@ -995,10 +995,14 @@ void InstructionSelector::VisitFloat64Min(Node* node) {
}
void InstructionSelector::VisitFloat32Abs(Node* node) { UNREACHABLE(); }
void InstructionSelector::VisitFloat32Abs(Node* node) {
VisitRR(this, kPPC_AbsDouble, node);
}
void InstructionSelector::VisitFloat64Abs(Node* node) { UNREACHABLE(); }
void InstructionSelector::VisitFloat64Abs(Node* node) {
VisitRR(this, kPPC_AbsDouble, node);
}
void InstructionSelector::VisitFloat32Sqrt(Node* node) {
@ -1536,8 +1540,10 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
// static
MachineOperatorBuilder::Flags
InstructionSelector::SupportedMachineOperatorFlags() {
return MachineOperatorBuilder::kFloat32Max |
return MachineOperatorBuilder::kFloat32Abs |
MachineOperatorBuilder::kFloat32Max |
MachineOperatorBuilder::kFloat32Min |
MachineOperatorBuilder::kFloat64Abs |
MachineOperatorBuilder::kFloat64Max |
MachineOperatorBuilder::kFloat64Min |
MachineOperatorBuilder::kFloat64RoundDown |