Fix rounding in Uint8ClampedArray setter.

src/platform-win32.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 26 matching lines @@
 #include "vm-state-inl.h"
 
 #ifdef _MSC_VER
 
 // Case-insensitive bounded string comparisons. Use stricmp() on Win32. Usually
 // defined in strings.h.
 int strncasecmp(const char* s1, const char* s2, int n) {
   return _strnicmp(s1, s2, n);
 }
 
+inline int lrint(double flt) {
+  int intgr;
+#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X64)
+  __asm {
+      fld flt
+      fistp intgr
+  };
+#else
+#pragma message("Falling back to casting for lrint().")
+  intgr = static_cast<int>(flt + 0.5);
+#endif
+  return intgr;
+}

[Yang, 2012/08/22 07:57:07]

Maybe it's better to throw a compile error here in case windows runs on
non-intel architecture in the future so that we will return to this issue.

[ulan, 2012/08/22 13:48:17]

I moved it to the header file and implemented the correct rounding in the
fallback case.

 #endif  // _MSC_VER
 
 
 // Extra functions for MinGW. Most of these are the _s functions which are in
 // the Microsoft Visual Studio C++ CRT.
 #ifdef __MINGW32__
 
 
 #ifndef __MINGW64_VERSION_MAJOR
 
@@ skipping 2065 matching lines @@
 
 
 void Sampler::Stop() {
   ASSERT(IsActive());
   SamplerThread::RemoveActiveSampler(this);
   SetActive(false);
 }
 
 
 } }  // namespace v8::internal