1 files changed, 4 insertions, 2 deletions
diff --git a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
index 53cb80c21..f171dc408 100644
--- a/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
+++ b/Source/JavaScriptCore/assembler/MacroAssemblerX86Common.h
@@ -68,6 +68,7 @@ public:
     enum ResultCondition {
         Overflow = X86Assembler::ConditionO,
         Signed = X86Assembler::ConditionS,
+        PositiveOrZero = X86Assembler::ConditionNS,
         Zero = X86Assembler::ConditionE,
         NonZero = X86Assembler::ConditionNE
     };
@@ -884,13 +885,14 @@ public:
     // If the result is not representable as a 32 bit value, branch.
     // May also branch for some values that are representable in 32 bits
     // (specifically, in this case, 0).
-    void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp)
+    void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp, bool negZeroCheck = true)
     {
         ASSERT(isSSE2Present());
         m_assembler.cvttsd2si_rr(src, dest);
 
         // If the result is zero, it might have been -0.0, and the double comparison won't catch this!
-        failureCases.append(branchTest32(Zero, dest));
+        if (negZeroCheck)
+            failureCases.append(branchTest32(Zero, dest));
 
         // Convert the integer result back to float & compare to the original value - if not equal or unordered (NaN) then jump.
         convertInt32ToDouble(dest, fpTemp);