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implement __mulh and __umulh

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svn path=/branches/ros-amd64-bringup/; revision=40088
This commit is contained in:
Timo Kreuzer
2009-03-18 16:17:53 +00:00
parent 0aa7524668
commit 7ef3df4e3b
1 changed files with 17 additions and 0 deletions
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reactos/include/crt/mingw32/intrin_x86.h
+17
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@@ -974,6 +974,23 @@ static __inline__ __attribute__((always_inline)) unsigned long long __emulu(cons
return retval;
}
#ifdef _M_AMD64
static __inline__ __attribute__((always_inline)) __int64 __mulh(__int64 a, __int64 b)
{
__int64 retval;
__asm__("imulq %[b]" : "=d" (retval) : [a] "a" (a), [b] "rm" (b));
return retval;
}
static __inline__ __attribute__((always_inline)) unsigned __int64 __umulh(unsigned __int64 a, unsigned __int64 b)
{
unsigned __int64 retval;
__asm__("mulq %[b]" : "=d" (retval) : [a] "a" (a), [b] "rm" (b));
return retval;
}
#endif
/*** Port I/O ***/
static __inline__ __attribute__((always_inline)) unsigned char __inbyte(const unsigned short Port)