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| author | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2006-09-10 22:29:02 +0000 |
|---|---|---|
| committer | Diego Biurrun <diego@biurrun.de> | 2006-09-10 22:29:02 +0000 |
| commit | 024da4b1460038812ce6bd598f746a7f60831354 (patch) | |
| tree | db582c17b57d40089f01d7095cff1a563433ac1b /libavcodec | |
| parent | 8c3dd5dc9cb78f2967ae52b18af3b4f4062c3f0b (diff) | |
| download | ffmpeg-024da4b1460038812ce6bd598f746a7f60831354.tar.gz | |
armv5 optimizations
patch by Siarhei Siamashka siarhei.siamashka at gmail com
Originally committed as revision 6228 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/mpegaudiodec.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c index 1fbde20392..e9c78332bc 100644 --- a/libavcodec/mpegaudiodec.c +++ b/libavcodec/mpegaudiodec.c @@ -27,6 +27,11 @@ #include "bitstream.h" #include "dsputil.h" +/* Assume that all Intel XScale processors support armv5 edsp instructions */ +#if defined(ARCH_ARMV4L) && defined (HAVE_IWMMXT) +#define ARCH_ARM5E +#endif + /* * TODO: * - in low precision mode, use more 16 bit multiplies in synth filter @@ -791,6 +796,17 @@ static inline int round_sample(int *sum) /* signed 16x16 -> 32 multiply */ # define MULS(ra, rb) \ ({ int __rt; asm ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); __rt; }) + +# elif defined(ARCH_ARM5E) + + /* signed 16x16 -> 32 multiply add accumulate */ +# define MACS(rt, ra, rb) \ + asm ("smlabb %0, %2, %3, %0" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb)); + + /* signed 16x16 -> 32 multiply */ +# define MULS(ra, rb) \ + ({ int __rt; asm ("smulbb %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); __rt; }) + # else /* signed 16x16 -> 32 multiply add accumulate */ # define MACS(rt, ra, rb) rt += (ra) * (rb) |