diff options
Diffstat (limited to 'liba52/resample.c')
| -rw-r--r-- | liba52/resample.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/liba52/resample.c b/liba52/resample.c index 99645fce73..51ec67d8a0 100644 --- a/liba52/resample.c +++ b/liba52/resample.c @@ -20,7 +20,10 @@ #include "../config.h" #ifdef HAVE_MMX -static uint64_t __attribute__((aligned(16))) magicF2W= 0x43c0000043c00000LL; +static uint64_t __attribute__((aligned(8))) magicF2W= 0x43c0000043c00000LL; +static uint64_t __attribute__((aligned(8))) wm1010= 0xFFFF0000FFFF0000LL; +static uint64_t __attribute__((aligned(8))) wm0101= 0x0000FFFF0000FFFFLL; +static uint64_t __attribute__((aligned(8))) wm1100= 0xFFFFFFFF00000000LL; #endif static inline int16_t convert (int32_t i) @@ -48,10 +51,45 @@ int a52_resample(float * _f, int16_t * s16) switch (flags) { case A52_MONO: +#ifdef HAVE_MMX + asm volatile( + "movl $-512, %%esi \n\t" + "movq magicF2W, %%mm7 \n\t" + "movq wm1100, %%mm3 \n\t" + "movq wm0101, %%mm4 \n\t" + "movq wm1010, %%mm5 \n\t" + "pxor %%mm6, %%mm6 \n\t" + "1: \n\t" + "movq (%1, %%esi, 2), %%mm0 \n\t" + "movq 8(%1, %%esi, 2), %%mm1 \n\t" + "leal (%%esi, %%esi, 4), %%edi \n\t" + "psubd %%mm7, %%mm0 \n\t" + "psubd %%mm7, %%mm1 \n\t" + "packssdw %%mm1, %%mm0 \n\t" + "movq %%mm0, %%mm1 \n\t" + "pand %%mm4, %%mm0 \n\t" + "pand %%mm5, %%mm1 \n\t" + "movq %%mm6, (%0, %%edi) \n\t" // 0 0 0 0 + "movd %%mm0, 8(%0, %%edi) \n\t" // A 0 + "pand %%mm3, %%mm0 \n\t" + "movd %%mm6, 12(%0, %%edi) \n\t" // 0 0 + "movd %%mm1, 16(%0, %%edi) \n\t" // 0 B + "pand %%mm3, %%mm1 \n\t" + "movd %%mm6, 20(%0, %%edi) \n\t" // 0 0 + "movq %%mm0, 24(%0, %%edi) \n\t" // 0 0 C 0 + "movq %%mm1, 32(%0, %%edi) \n\t" // 0 0 0 B + "addl $8, %%esi \n\t" + " jnz 1b \n\t" + "emms \n\t" + :: "r" (s16+1280), "r" (f+256) + :"%esi", "%edi", "memory" + ); +#else for (i = 0; i < 256; i++) { s16[5*i] = s16[5*i+1] = s16[5*i+2] = s16[5*i+3] = 0; s16[5*i+4] = convert (f[i]); } +#endif break; case A52_CHANNEL: case A52_STEREO: |