Fix rounding in Uint8ClampedArray setter.

src/platform-win32.cc

Index: src/platform-win32.cc
diff --git a/src/platform-win32.cc b/src/platform-win32.cc
index 49463be8e00fbf8ab022e71ba8af5fccaf0f2f09..2defae5ed3fe77b01d8b09f3b80d357210d9717d 100644
--- a/src/platform-win32.cc
+++ b/src/platform-win32.cc
@@ -44,6 +44,19 @@ 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