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| author | Måns Rullgård <mans@mansr.com> | 2008-07-15 19:06:25 +0000 |
|---|---|---|
| committer | Måns Rullgård <mans@mansr.com> | 2008-07-15 19:06:25 +0000 |
| commit | 7995962d4b23619e4cc52b4466f85488749bc718 (patch) | |
| tree | 8bff93998618ccd6d3107c7d2868589cb1885c63 | |
| parent | 6651ce17b82a800e20e18b38d006c47a07413464 (diff) | |
| download | ffmpeg-7995962d4b23619e4cc52b4466f85488749bc718.tar.gz | |
ARM: ARMv6 optimised MULH
Originally committed as revision 14243 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/armv4l/mathops.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavcodec/armv4l/mathops.h b/libavcodec/armv4l/mathops.h index cc097c3fff..dd53310683 100644 --- a/libavcodec/armv4l/mathops.h +++ b/libavcodec/armv4l/mathops.h @@ -33,10 +33,20 @@ hi; }) #endif +#ifdef HAVE_ARMV6 +static inline av_const int MULH(int a, int b) +{ + int r; + asm ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); + return r; +} +#define MULH MULH +#else #define MULH(a, b) \ ({ int lo, hi;\ asm ("smull %0, %1, %2, %3" : "=&r"(lo), "=&r"(hi) : "r"(b), "r"(a));\ hi; }) +#endif #if defined(HAVE_ARMV5TE) |