Sign in
third-party-mirror
/
mingw-w64
/
4af5f10d9841f1c1bc781335eac4269a89788a09
/
.
/
mingw-w64-crt
/
intrincs
/
bitscanfwd64.c
blob: fd1be97181be09d209f7cfaa97c012ccfc73b21f [
file
] [
log
] [
blame
]
#include
<intrin.h>
unsigned
char
_BitScanForward64
(
unsigned
long
*
Index
,
unsigned
__int64
Mask
)
{
unsigned
__int64 n
;
__asm__ __volatile__
(
"bsfq %0,%1"
:
"+r"
(
Mask
),
"=rm"
(
n
)
:
:
"memory"
);
*
Index
=
(
unsigned
long
)
n
;
return
(
Mask
!=
0
);
}