diff options
Diffstat (limited to 'liba52')
| -rw-r--r-- | liba52/downmix.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/liba52/downmix.c b/liba52/downmix.c index 4f1ba231e8..4cb3634728 100644 --- a/liba52/downmix.c +++ b/liba52/downmix.c @@ -402,11 +402,32 @@ static void mix3to2 (sample_t * samples, sample_t bias) int i; sample_t common; +#ifdef HAVE_SSE + asm volatile( + "movlps %1, %%xmm7 \n\t" + "shufps $0x00, %%xmm7, %%xmm7 \n\t" + "movl $-1024, %%esi \n\t" + "1: \n\t" + "movaps 1024(%0, %%esi), %%xmm0 \n\t" + "addps %%xmm7, %%xmm0 \n\t" //common + "movaps (%0, %%esi), %%xmm1 \n\t" + "movaps 2048(%0, %%esi), %%xmm2 \n\t" + "addps %%xmm0, %%xmm1 \n\t" + "addps %%xmm0, %%xmm2 \n\t" + "movaps %%xmm1, (%0, %%esi) \n\t" + "movaps %%xmm2, 1024(%0, %%esi) \n\t" + "addl $16, %%esi \n\t" + " jnz 1b \n\t" + :: "r" (samples+256), "m" (bias) + : "%esi" + ); +#else for (i = 0; i < 256; i++) { common = samples[i + 256] + bias; samples[i] += common; samples[i + 256] = samples[i + 512] + common; } +#endif } static void mix21to2 (sample_t * left, sample_t * right, sample_t bias) @@ -670,7 +691,7 @@ void downmix (sample_t * samples, int acmod, int output, sample_t bias, break; case CONVERT (A52_3F2R, A52_2F1R): - mix3to2 (samples, bias); + mix3to2 (samples, bias); //FIXME possible bug? (output doesnt seem to be used) move2to1 (samples + 768, samples + 512, bias); break; |