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resample_mmx.c

// MMX optimizations from Michael Niedermayer (michaelni@gmx.at) (under GPL)

/* optimization TODO / NOTES
    movntq is slightly faster (0.5% with the current test.c benchmark)
      (but thats just test.c so that needs to be testd in reallity)
      and it would mean (C / MMX2 / MMX / 3DNOW) versions
*/

static uint64_t __attribute__((aligned(8))) attribute_used magicF2W= 0x43c0000043c00000LL;
static uint64_t __attribute__((aligned(8))) attribute_used wm1010= 0xFFFF0000FFFF0000LL;
static uint64_t __attribute__((aligned(8))) attribute_used wm0101= 0x0000FFFF0000FFFFLL;
static uint64_t __attribute__((aligned(8))) attribute_used wm1100= 0xFFFFFFFF00000000LL;

static int a52_resample_MONO_to_5_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-512, %%esi            \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "movq "MANGLE(wm1100)", %%mm3 \n\t"
            "movq "MANGLE(wm0101)", %%mm4 \n\t"
            "movq "MANGLE(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"
      );
    return 5*256;
}

static int a52_resample_STEREO_to_2_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
/* benchmark scores are 0.3% better with SSE but we would need to set bias=0 and premultiply it
#ifdef HAVE_SSE
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "1:                     \n\t"
            "cvtps2pi (%1, %%esi), %%mm0  \n\t"
            "cvtps2pi 1024(%1, %%esi), %%mm2\n\t"
            "movq %%mm0, %%mm1            \n\t"
            "punpcklwd %%mm2, %%mm0       \n\t"
            "punpckhwd %%mm2, %%mm1       \n\t"
            "movq %%mm0, (%0, %%esi)      \n\t"
            "movq %%mm1, 8(%0, %%esi)     \n\t"
            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+512), "r" (f+256)
            :"%esi", "memory"
      );*/
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "1:                     \n\t"
            "movq (%1, %%esi), %%mm0      \n\t"
            "movq 8(%1, %%esi), %%mm1     \n\t"
            "movq 1024(%1, %%esi), %%mm2  \n\t"
            "movq 1032(%1, %%esi), %%mm3  \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "movq %%mm0, %%mm1            \n\t"
            "punpcklwd %%mm2, %%mm0       \n\t"
            "punpckhwd %%mm2, %%mm1       \n\t"
            "movq %%mm0, (%0, %%esi)      \n\t"
            "movq %%mm1, 8(%0, %%esi)     \n\t"
            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+512), "r" (f+256)
            :"%esi", "memory"
      );
    return 2*256;
}

static int a52_resample_3F_to_5_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "pxor %%mm6, %%mm6            \n\t"
            "movq %%mm7, %%mm5            \n\t"
            "punpckldq %%mm6, %%mm5       \n\t"
            "1:                     \n\t"
            "movd (%1, %%esi), %%mm0      \n\t"
            "punpckldq 2048(%1, %%esi), %%mm0\n\t"
            "movd 1024(%1, %%esi), %%mm1  \n\t"
            "punpckldq 4(%1, %%esi), %%mm1      \n\t"
            "movd 2052(%1, %%esi), %%mm2  \n\t"
            "movq %%mm7, %%mm3            \n\t"
            "punpckldq 1028(%1, %%esi), %%mm3\n\t"
            "movd 8(%1, %%esi), %%mm4     \n\t"
            "punpckldq 2056(%1, %%esi), %%mm4\n\t"
            "leal (%%esi, %%esi, 4), %%edi      \n\t"
            "sarl $1, %%edi               \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm5, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "psubd %%mm7, %%mm4           \n\t"
            "packssdw %%mm6, %%mm0        \n\t"
            "packssdw %%mm2, %%mm1        \n\t"
            "packssdw %%mm4, %%mm3        \n\t"
            "movq %%mm0, (%0, %%edi)      \n\t"
            "movq %%mm1, 8(%0, %%edi)     \n\t"
            "movq %%mm3, 16(%0, %%edi)    \n\t"

            "movd 1032(%1, %%esi), %%mm1  \n\t"
            "punpckldq 12(%1, %%esi), %%mm1\n\t"
            "movd 2060(%1, %%esi), %%mm2  \n\t"
            "movq %%mm7, %%mm3            \n\t"
            "punpckldq 1036(%1, %%esi), %%mm3\n\t"
            "pxor %%mm0, %%mm0            \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm5, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "movq %%mm0, 24(%0, %%edi)    \n\t"
            "movq %%mm2, 32(%0, %%edi)    \n\t"

            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1280), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 5*256;
}

static int a52_resample_2F_2R_to_4_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "1:                     \n\t"
            "movq (%1, %%esi), %%mm0      \n\t"
            "movq 8(%1, %%esi), %%mm1     \n\t"
            "movq 1024(%1, %%esi), %%mm2  \n\t"
            "movq 1032(%1, %%esi), %%mm3  \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "movq 2048(%1, %%esi), %%mm3  \n\t"
            "movq 2056(%1, %%esi), %%mm4  \n\t"
            "movq 3072(%1, %%esi), %%mm5  \n\t"
            "movq 3080(%1, %%esi), %%mm6  \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "psubd %%mm7, %%mm4           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "psubd %%mm7, %%mm6           \n\t"
            "packssdw %%mm4, %%mm3        \n\t"
            "packssdw %%mm6, %%mm5        \n\t"
            "movq %%mm0, %%mm1            \n\t"
            "movq %%mm3, %%mm4            \n\t"
            "punpcklwd %%mm2, %%mm0       \n\t"
            "punpckhwd %%mm2, %%mm1       \n\t"
            "punpcklwd %%mm5, %%mm3       \n\t"
            "punpckhwd %%mm5, %%mm4       \n\t"
            "movq %%mm0, %%mm2            \n\t"
            "movq %%mm1, %%mm5            \n\t"
            "punpckldq %%mm3, %%mm0       \n\t"
            "punpckhdq %%mm3, %%mm2       \n\t"
            "punpckldq %%mm4, %%mm1       \n\t"
            "punpckhdq %%mm4, %%mm5       \n\t"
            "movq %%mm0, (%0, %%esi,2)    \n\t"
            "movq %%mm2, 8(%0, %%esi,2)   \n\t"
            "movq %%mm1, 16(%0, %%esi,2)  \n\t"
            "movq %%mm5, 24(%0, %%esi,2)  \n\t"
            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1024), "r" (f+256)
            :"%esi", "memory"
      );
    return 4*256;
}

static int a52_resample_3F_2R_to_5_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "1:                     \n\t"
            "movd (%1, %%esi), %%mm0      \n\t"
            "punpckldq 2048(%1, %%esi), %%mm0\n\t"
            "movd 3072(%1, %%esi), %%mm1  \n\t"
            "punpckldq 4096(%1, %%esi), %%mm1\n\t"
            "movd 1024(%1, %%esi), %%mm2  \n\t"
            "punpckldq 4(%1, %%esi), %%mm2      \n\t"
            "movd 2052(%1, %%esi), %%mm3  \n\t"
            "punpckldq 3076(%1, %%esi), %%mm3\n\t"
            "movd 4100(%1, %%esi), %%mm4  \n\t"
            "punpckldq 1028(%1, %%esi), %%mm4\n\t"
            "movd 8(%1, %%esi), %%mm5     \n\t"
            "punpckldq 2056(%1, %%esi), %%mm5\n\t"
            "leal (%%esi, %%esi, 4), %%edi      \n\t"
            "sarl $1, %%edi               \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "psubd %%mm7, %%mm4           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "packssdw %%mm5, %%mm4        \n\t"
            "movq %%mm0, (%0, %%edi)      \n\t"
            "movq %%mm2, 8(%0, %%edi)     \n\t"
            "movq %%mm4, 16(%0, %%edi)    \n\t"

            "movd 3080(%1, %%esi), %%mm0  \n\t"
            "punpckldq 4104(%1, %%esi), %%mm0\n\t"
            "movd 1032(%1, %%esi), %%mm1  \n\t"
            "punpckldq 12(%1, %%esi), %%mm1\n\t"
            "movd 2060(%1, %%esi), %%mm2  \n\t"
            "punpckldq 3084(%1, %%esi), %%mm2\n\t"
            "movd 4108(%1, %%esi), %%mm3  \n\t"
            "punpckldq 1036(%1, %%esi), %%mm3\n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "movq %%mm0, 24(%0, %%edi)    \n\t"
            "movq %%mm2, 32(%0, %%edi)    \n\t"

            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1280), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 5*256;
}

static int a52_resample_MONO_LFE_to_6_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "pxor %%mm6, %%mm6            \n\t"
            "1:                     \n\t"
            "movq 1024(%1, %%esi), %%mm0  \n\t"
            "movq 1032(%1, %%esi), %%mm1  \n\t"
            "movq (%1, %%esi), %%mm2      \n\t"
            "movq 8(%1, %%esi), %%mm3     \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "packssdw %%mm1, %%mm0        \n\t"
            "packssdw %%mm3, %%mm2        \n\t"
            "movq %%mm0, %%mm1            \n\t"
            "punpcklwd %%mm2, %%mm0       \n\t"
            "punpckhwd %%mm2, %%mm1       \n\t"
            "leal (%%esi, %%esi, 2), %%edi      \n\t"
            "movq %%mm6, (%0, %%edi)      \n\t"
            "movd %%mm0, 8(%0, %%edi)     \n\t"
            "punpckhdq %%mm0, %%mm0       \n\t"
            "movq %%mm6, 12(%0, %%edi)    \n\t"
            "movd %%mm0, 20(%0, %%edi)    \n\t"
            "movq %%mm6, 24(%0, %%edi)    \n\t"
            "movd %%mm1, 32(%0, %%edi)    \n\t"
            "punpckhdq %%mm1, %%mm1       \n\t"
            "movq %%mm6, 36(%0, %%edi)    \n\t"
            "movd %%mm1, 44(%0, %%edi)    \n\t"
            "addl $16, %%esi        \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1536), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 6*256;
}

static int a52_resample_STEREO_LFE_to_6_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "pxor %%mm6, %%mm6            \n\t"
            "1:                     \n\t"
            "movq 1024(%1, %%esi), %%mm0  \n\t"
            "movq 2048(%1, %%esi), %%mm1  \n\t"
            "movq (%1, %%esi), %%mm5      \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "leal (%%esi, %%esi, 2), %%edi      \n\t"

            "pxor %%mm4, %%mm4            \n\t"
            "packssdw %%mm5, %%mm0        \n\t" // FfAa
            "packssdw %%mm4, %%mm1        \n\t" // 00Bb
            "punpckhwd %%mm0, %%mm4       \n\t" // F0f0
            "punpcklwd %%mm1, %%mm0       \n\t" // BAba
            "movq %%mm0, %%mm1            \n\t" // BAba
            "punpckldq %%mm4, %%mm3       \n\t" // f0XX
            "punpckldq %%mm6, %%mm0       \n\t" // 00ba
            "punpckhdq %%mm1, %%mm3       \n\t" // BAf0

            "movq %%mm0, (%0, %%edi)      \n\t" // 00ba
            "punpckhdq %%mm4, %%mm0       \n\t" // F000
            "movq %%mm3, 8(%0, %%edi)     \n\t" // BAf0
            "movq %%mm0, 16(%0, %%edi)    \n\t" // F000
            "addl $8, %%esi               \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1536), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 6*256;
}

static int a52_resample_3F_LFE_to_6_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
            "pxor %%mm6, %%mm6            \n\t"
            "1:                     \n\t"
            "movq 1024(%1, %%esi), %%mm0  \n\t"
            "movq 3072(%1, %%esi), %%mm1  \n\t"
            "movq 2048(%1, %%esi), %%mm4  \n\t"
            "movq (%1, %%esi), %%mm5      \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm4           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "leal (%%esi, %%esi, 2), %%edi      \n\t"

            "packssdw %%mm4, %%mm0        \n\t" // EeAa
            "packssdw %%mm5, %%mm1        \n\t" // FfBb
            "movq %%mm0, %%mm2            \n\t" // EeAa
            "punpcklwd %%mm1, %%mm0       \n\t" // BAba
            "punpckhwd %%mm1, %%mm2       \n\t" // FEfe
            "movq %%mm0, %%mm1            \n\t" // BAba
            "punpckldq %%mm6, %%mm0       \n\t" // 00ba
            "punpckhdq %%mm1, %%mm1       \n\t" // BABA

            "movq %%mm0, (%0, %%edi)      \n\t"
            "punpckhdq %%mm2, %%mm0       \n\t" // FE00
            "punpckldq %%mm1, %%mm2       \n\t" // BAfe
            "movq %%mm2, 8(%0, %%edi)     \n\t"
            "movq %%mm0, 16(%0, %%edi)    \n\t"
            "addl $8, %%esi               \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1536), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 6*256;
}

static int a52_resample_2F_2R_LFE_to_6_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
//          "pxor %%mm6, %%mm6            \n\t"
            "1:                     \n\t"
            "movq 1024(%1, %%esi), %%mm0  \n\t"
            "movq 2048(%1, %%esi), %%mm1  \n\t"
            "movq 3072(%1, %%esi), %%mm2  \n\t"
            "movq 4096(%1, %%esi), %%mm3  \n\t"
            "movq (%1, %%esi), %%mm5      \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "leal (%%esi, %%esi, 2), %%edi      \n\t"

            "packssdw %%mm2, %%mm0        \n\t" // CcAa
            "packssdw %%mm3, %%mm1        \n\t" // DdBb
            "packssdw %%mm5, %%mm5        \n\t" // FfFf
            "movq %%mm0, %%mm2            \n\t" // CcAa
            "punpcklwd %%mm1, %%mm0       \n\t" // BAba
            "punpckhwd %%mm1, %%mm2       \n\t" // DCdc
            "pxor %%mm4, %%mm4            \n\t" // 0000
            "punpcklwd %%mm5, %%mm4       \n\t" // F0f0
            "movq %%mm0, %%mm1            \n\t" // BAba
            "movq %%mm4, %%mm3            \n\t" // F0f0
            "punpckldq %%mm2, %%mm0       \n\t" // dcba
            "punpckhdq %%mm1, %%mm1       \n\t" // BABA
            "punpckldq %%mm1, %%mm4       \n\t" // BAf0
            "punpckhdq %%mm3, %%mm2       \n\t" // F0DC

            "movq %%mm0, (%0, %%edi)      \n\t"
            "movq %%mm4, 8(%0, %%edi)     \n\t"
            "movq %%mm2, 16(%0, %%edi)    \n\t"
            "addl $8, %%esi               \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1536), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 6*256;
}

static int a52_resample_3F_2R_LFE_to_6_MMX(float * _f, int16_t * s16){
    int32_t * f = (int32_t *) _f;
      asm volatile(
            "movl $-1024, %%esi           \n\t"
            "movq "MANGLE(magicF2W)", %%mm7     \n\t"
//          "pxor %%mm6, %%mm6            \n\t"
            "1:                     \n\t"
            "movq 1024(%1, %%esi), %%mm0  \n\t"
            "movq 3072(%1, %%esi), %%mm1  \n\t"
            "movq 4096(%1, %%esi), %%mm2  \n\t"
            "movq 5120(%1, %%esi), %%mm3  \n\t"
            "movq 2048(%1, %%esi), %%mm4  \n\t"
            "movq (%1, %%esi), %%mm5      \n\t"
            "psubd %%mm7, %%mm0           \n\t"
            "psubd %%mm7, %%mm1           \n\t"
            "psubd %%mm7, %%mm2           \n\t"
            "psubd %%mm7, %%mm3           \n\t"
            "psubd %%mm7, %%mm4           \n\t"
            "psubd %%mm7, %%mm5           \n\t"
            "leal (%%esi, %%esi, 2), %%edi      \n\t"

            "packssdw %%mm2, %%mm0        \n\t" // CcAa
            "packssdw %%mm3, %%mm1        \n\t" // DdBb
            "packssdw %%mm4, %%mm4        \n\t" // EeEe
            "packssdw %%mm5, %%mm5        \n\t" // FfFf
            "movq %%mm0, %%mm2            \n\t" // CcAa
            "punpcklwd %%mm1, %%mm0       \n\t" // BAba
            "punpckhwd %%mm1, %%mm2       \n\t" // DCdc
            "punpcklwd %%mm5, %%mm4       \n\t" // FEfe
            "movq %%mm0, %%mm1            \n\t" // BAba
            "movq %%mm4, %%mm3            \n\t" // FEfe
            "punpckldq %%mm2, %%mm0       \n\t" // dcba
            "punpckhdq %%mm1, %%mm1       \n\t" // BABA
            "punpckldq %%mm1, %%mm4       \n\t" // BAfe
            "punpckhdq %%mm3, %%mm2       \n\t" // FEDC

            "movq %%mm0, (%0, %%edi)      \n\t"
            "movq %%mm4, 8(%0, %%edi)     \n\t"
            "movq %%mm2, 16(%0, %%edi)    \n\t"
            "addl $8, %%esi               \n\t"
            " jnz 1b                \n\t"
            "emms                   \n\t"
            :: "r" (s16+1536), "r" (f+256)
            :"%esi", "%edi", "memory"
      );
    return 6*256;
}


static void* a52_resample_MMX(int flags, int ch){
    switch (flags) {
    case A52_MONO:
      if(ch==5) return a52_resample_MONO_to_5_MMX;
      break;
    case A52_CHANNEL:
    case A52_STEREO:
    case A52_DOLBY:
      if(ch==2) return a52_resample_STEREO_to_2_MMX;
      break;
    case A52_3F:
      if(ch==5) return a52_resample_3F_to_5_MMX;
      break;
    case A52_2F2R:
      if(ch==4) return a52_resample_2F_2R_to_4_MMX;
      break;
    case A52_3F2R:
      if(ch==5) return a52_resample_3F_2R_to_5_MMX;
      break;
    case A52_MONO | A52_LFE:
      if(ch==6) return a52_resample_MONO_LFE_to_6_MMX;
      break;
    case A52_CHANNEL | A52_LFE:
    case A52_STEREO | A52_LFE:
    case A52_DOLBY | A52_LFE:
      if(ch==6) return a52_resample_STEREO_LFE_to_6_MMX;
      break;
    case A52_3F | A52_LFE:
      if(ch==6) return a52_resample_3F_LFE_to_6_MMX;
      break;
    case A52_2F2R | A52_LFE:
      if(ch==6) return a52_resample_2F_2R_LFE_to_6_MMX;
      break;
    case A52_3F2R | A52_LFE:
      if(ch==6) return a52_resample_3F_2R_LFE_to_6_MMX;
      break;
    }
    return NULL;
}



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