Changeset 150748 in webkit for trunk/Source/JavaScriptCore/assembler/MacroAssemblerARM.h

Timestamp:

May 27, 2013, 5:23:13 AM (12 years ago)

Author:

[email protected]

Message:

MacroAssemblerARM should use xor to swap registers instead of move
​https://bugs.webkit.org/show_bug.cgi?id=116306

Reviewed by Zoltan Herczeg.

Change register swapping to xor from move and this way we don't need
temporary register anymore.

• assembler/MacroAssemblerARM.h:

(JSC::MacroAssemblerARM::swap):

File:

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

trunk/Source/JavaScriptCore/assembler/MacroAssemblerARM.h

@@ -540 +540 @@
     void swap(RegisterID reg1, RegisterID reg2)
     {
-        move(reg1, ARMRegisters::S0);
-        move(reg2, reg1);
-        move(ARMRegisters::S0, reg2);
+        xor32(reg1, reg2);
+        xor32(reg2, reg1);
+        xor32(reg1, reg2);
     }