Changeset 240650 in webkit for trunk/Source/JavaScriptCore/assembler/ARMv7Assembler.h

Timestamp:

Jan 29, 2019, 2:41:27 AM (6 years ago)

Author:

[email protected]

Message:

[ARM] Check for negative zero instead of just zero
​https://bugs.webkit.org/show_bug.cgi?id=193689

Reviewed by Mark Lam.

ARM now performs a negative zero check in branchConvertDoubleToInt32 instead
of just bailing out for zero.

• assembler/MacroAssemblerARMv7.h:

(JSC::MacroAssemblerARMv7::branchConvertDoubleToInt32):

File:

• trunk/Source/JavaScriptCore/assembler/ARMv7Assembler.h (modified) (1 diff)

trunk/Source/JavaScriptCore/assembler/ARMv7Assembler.h

@@ -171 +171 @@
         ASSERT(reg < d16);
         return (FPSingleRegisterID)(reg << 1);
+    }
+
+    inline FPSingleRegisterID asSingleUpper(FPDoubleRegisterID reg)
+    {
+        ASSERT(reg < d16);
+        return (FPSingleRegisterID)((reg << 1) + 1);
     }