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[ARM64] [turbofan] Use 'mvn' rather than an equivalent 'orn'.

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`mvn xd, xn` is an architectural alias for `orn xd, xzr, xm`, so this
doesn't change code generation at all, but it's tidier and it addresses
a TODO.

BUG=

Review URL: https://codereview.chromium.org/1151483002

Cr-Commit-Position: refs/heads/master@{#28507}
This commit is contained in:
jacob.bramley 2015-05-20 04:04:34 -07:00 committed by Commit bot
parent 35e3489e8f
commit f88606e25d
1 changed files with 2 additions and 3 deletions
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5
src/compiler/arm64/code-generator-arm64.cc
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@ -558,12 +558,11 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
i.InputRegister32(0));
break;
}
// TODO(dcarney): use mvn instr??
case kArm64Not:
__ Orn(i.OutputRegister(), xzr, i.InputOperand(0));
__ Mvn(i.OutputRegister(), i.InputOperand(0));
break;
case kArm64Not32:
__ Orn(i.OutputRegister32(), wzr, i.InputOperand32(0));
__ Mvn(i.OutputRegister32(), i.InputOperand32(0));
break;
case kArm64Neg:
__ Neg(i.OutputRegister(), i.InputOperand(0));