Tweak Math.log on ia32/x64

src/ia32/full-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3292 matching lines @@
   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
   // This is implemented on both SSE2 and FPU.
   if (CpuFeatures::IsSupported(SSE2)) {
     CpuFeatureScope fscope(masm(), SSE2);
     __ mov(ebx, Immediate(0x49800000));  // 1.0 x 2^20 as single.
     __ movd(xmm1, ebx);
     __ movd(xmm0, eax);
     __ cvtss2sd(xmm1, xmm1);
     __ xorps(xmm0, xmm1);
     __ subsd(xmm0, xmm1);
-    __ movdbl(FieldOperand(edi, HeapNumber::kValueOffset), xmm0);
+    __ movsd(FieldOperand(edi, HeapNumber::kValueOffset), xmm0);
   } else {
     // 0x4130000000000000 is 1.0 x 2^20 as a double.
     __ mov(FieldOperand(edi, HeapNumber::kExponentOffset),
            Immediate(0x41300000));
     __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax);
     __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset));
     __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0));
     __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset));
     __ fsubp(1);
     __ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset));
@@ skipping 1636 matching lines @@
 
   ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
             Assembler::target_address_at(call_target_address));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32