1 files changed, 5 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/jit/SpecializedThunkJIT.h b/Source/JavaScriptCore/jit/SpecializedThunkJIT.h
index 9a0e0a30e..6b09781a0 100644
--- a/Source/JavaScriptCore/jit/SpecializedThunkJIT.h
+++ b/Source/JavaScriptCore/jit/SpecializedThunkJIT.h
@@ -98,9 +98,14 @@ namespace JSC {
             move(tagTypeNumberRegister, regT0);
             done.link(this);
 #else
+#if !CPU(X86)
+            // The src register is not clobbered by moveDoubleToInts with ARM, MIPS and SH4 macro assemblers, so let's use it.
+            moveDoubleToInts(src, regT0, regT1);
+#else
             storeDouble(src, Address(stackPointerRegister, -(int)sizeof(double)));
             loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.tag) - sizeof(double)), regT1);
             loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.payload) - sizeof(double)), regT0);
+#endif
             Jump lowNonZero = branchTestPtr(NonZero, regT1);
             Jump highNonZero = branchTestPtr(NonZero, regT0);
             move(TrustedImm32(0), regT0);