include cstdint type

add mulh like function for gcc

avoid multiple definitions of msvc intrinsic replacements

Utilities/GNU.cpp

@@ -18,3 +18,31 @@ int clock_gettime(int foo, struct timespec *ts) {
   return(0);
 }
 #endif /* !__APPLE__ */
+
+#if defined(__GNUG__)
+int64_t InterlockedOr64(volatile int64_t *dest, int64_t val)
+{
+	int64_t olderval;
+	int64_t oldval = *dest;
+	do
+	{
+		olderval = oldval;
+		oldval = InterlockedCompareExchange64(dest, olderval | val, olderval);
+	} while (olderval != oldval);
+	return oldval;
+}
+
+uint64_t __umulh(uint64_t a, uint64_t b)
+{
+	uint64_t result;
+	__asm__("mulq %[b]" : "=d" (result) : [a] "a" (a), [b] "rm" (b));
+	return result;
+}
+
+int64_t  __mulh(int64_t a, int64_t b)
+{
+	int64_t result;
+	__asm__("imulq %[b]" : "=d" (result) : [a] "a" (a), [b] "rm" (b));
+	return result;
+}
+#endif