WebKit side of merge from r41149 to r41181.

JavaScriptCore/jit/JITArithmetic.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 603 matching lines @@
     struct SSE2Check {
         SSE2Check()
         {
             int flags;
 #if COMPILER(MSVC)
             _asm {
                 mov eax, 1 // cpuid function 1 gives us the standard feature set
                 cpuid;
                 mov flags, edx;
             }
+#elif COMPILER(GCC)
+            asm (
+                "movl $0x1, %%eax;"
+                "pushl %%ebx;"
+                "cpuid;"
+                "popl %%ebx;"
+                "movl %%edx, %0;"
+                : "=g" (flags)
+                :
+                : "%eax", "%ecx", "%edx"
+            );
 #else
             flags = 0;
-            // FIXME: Add GCC code to do above asm
 #endif
             present = (flags & SSE2FeatureBit) != 0;
         }
         bool present;
     };
     static SSE2Check check;
     return check.present;
 }
 
 #endif
@@ skipping 344 matching lines @@
 void JIT::compileFastArithSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     compileBinaryArithOpSlowCase(op_sub, iter, currentInstruction[1].u.operand, currentInstruction[2].u.operand, currentInstruction[3].u.operand, OperandTypes::fromInt(currentInstruction[4].u.operand));
 }
 
 #endif
 
 } // namespace JSC
 
 #endif // ENABLE(JIT)