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Linshizhi
ffmpeg.wasm-core
Commits
6865e046
Commit
6865e046
authored
Jul 15, 2008
by
Måns Rullgård
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ARM: optimised MUL64
Originally committed as revision 14244 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
7995962d
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mathops.h
libavcodec/armv4l/mathops.h
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libavcodec/armv4l/mathops.h
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6865e046
...
...
@@ -48,6 +48,15 @@ static inline av_const int MULH(int a, int b)
hi; })
#endif
static
inline
av_const
int64_t
MUL64
(
int
a
,
int
b
)
{
union
{
uint64_t
x
;
unsigned
hl
[
2
];
}
x
;
asm
(
"smull %0, %1, %2, %3"
:
"=r"
(
x
.
hl
[
0
]),
"=r"
(
x
.
hl
[
1
])
:
"r"
(
a
),
"r"
(
b
));
return
x
.
x
;
}
#define MUL64 MUL64
#if defined(HAVE_ARMV5TE)
/* signed 16x16 -> 32 multiply add accumulate */
...
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