src/crankshaft/x87/lithium-gap-resolver-x87.cc - Issue 1586013006: X87: [turbofan] avoid xchg instruction on Intel.

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Unified Diff: src/crankshaft/x87/lithium-gap-resolver-x87.cc

Issue 1586013006: X87: [turbofan] avoid xchg instruction on Intel. Base URL: https://chromium.googlesource.com/v8/v8.git@master

Patch Set: Created 4 years, 11 months ago

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Index: src/crankshaft/x87/lithium-gap-resolver-x87.cc

diff --git a/src/crankshaft/x87/lithium-gap-resolver-x87.cc b/src/crankshaft/x87/lithium-gap-resolver-x87.cc

index aa9183541fc8b34c20328c15ba6c4b7012e04074..80e39934595ba3a877e210379ea77ff34f3ff8d2 100644

--- a/src/crankshaft/x87/lithium-gap-resolver-x87.cc

+++ b/src/crankshaft/x87/lithium-gap-resolver-x87.cc

@@ -374,7 +374,9 @@ void LGapResolver::EmitSwap(int index) {

// Register-register.

- __ xchg(dst, src);

+ __ push(src);

+ __ mov(src, dst);

+ __ pop(dst);

} else if ((source->IsRegister() && destination->IsStackSlot()) ||

(source->IsStackSlot() && destination->IsRegister())) {

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