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libavcodec/x86/vp6dsp_mmx.c

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00001 
00024 #include "libavutil/x86_cpu.h"
00025 #include "libavcodec/dsputil.h"
00026 #include "dsputil_mmx.h"
00027 #include "vp6dsp_mmx.h"
00028 
00029 
00030 #define DIAG4_MMX(in1,in2,in3,in4)                                            \
00031     "movq  "#in1"(%0), %%mm0             \n\t"                                \
00032     "movq  "#in2"(%0), %%mm1             \n\t"                                \
00033     "movq       %%mm0, %%mm3             \n\t"                                \
00034     "movq       %%mm1, %%mm4             \n\t"                                \
00035     "punpcklbw  %%mm7, %%mm0             \n\t"                                \
00036     "punpcklbw  %%mm7, %%mm1             \n\t"                                \
00037     "punpckhbw  %%mm7, %%mm3             \n\t"                                \
00038     "punpckhbw  %%mm7, %%mm4             \n\t"                                \
00039     "pmullw     0(%2), %%mm0             \n\t" /* src[x-8 ] * biweight [0] */ \
00040     "pmullw     8(%2), %%mm1             \n\t" /* src[x   ] * biweight [1] */ \
00041     "pmullw     0(%2), %%mm3             \n\t" /* src[x-8 ] * biweight [0] */ \
00042     "pmullw     8(%2), %%mm4             \n\t" /* src[x   ] * biweight [1] */ \
00043     "paddw      %%mm1, %%mm0             \n\t"                                \
00044     "paddw      %%mm4, %%mm3             \n\t"                                \
00045     "movq  "#in3"(%0), %%mm1             \n\t"                                \
00046     "movq  "#in4"(%0), %%mm2             \n\t"                                \
00047     "movq       %%mm1, %%mm4             \n\t"                                \
00048     "movq       %%mm2, %%mm5             \n\t"                                \
00049     "punpcklbw  %%mm7, %%mm1             \n\t"                                \
00050     "punpcklbw  %%mm7, %%mm2             \n\t"                                \
00051     "punpckhbw  %%mm7, %%mm4             \n\t"                                \
00052     "punpckhbw  %%mm7, %%mm5             \n\t"                                \
00053     "pmullw    16(%2), %%mm1             \n\t" /* src[x+8 ] * biweight [2] */ \
00054     "pmullw    24(%2), %%mm2             \n\t" /* src[x+16] * biweight [3] */ \
00055     "pmullw    16(%2), %%mm4             \n\t" /* src[x+8 ] * biweight [2] */ \
00056     "pmullw    24(%2), %%mm5             \n\t" /* src[x+16] * biweight [3] */ \
00057     "paddw      %%mm2, %%mm1             \n\t"                                \
00058     "paddw      %%mm5, %%mm4             \n\t"                                \
00059     "paddsw     %%mm1, %%mm0             \n\t"                                \
00060     "paddsw     %%mm4, %%mm3             \n\t"                                \
00061     "paddsw     %%mm6, %%mm0             \n\t" /* Add 64 */                   \
00062     "paddsw     %%mm6, %%mm3             \n\t" /* Add 64 */                   \
00063     "psraw         $7, %%mm0             \n\t"                                \
00064     "psraw         $7, %%mm3             \n\t"                                \
00065     "packuswb   %%mm3, %%mm0             \n\t"                                \
00066     "movq       %%mm0,  (%1)             \n\t"
00067 
00068 void ff_vp6_filter_diag4_mmx(uint8_t *dst, uint8_t *src, int stride,
00069                              const int16_t *h_weights, const int16_t *v_weights)
00070 {
00071     uint8_t tmp[8*11], *t = tmp;
00072     int16_t weights[4*4];
00073     int i;
00074     src -= stride;
00075 
00076     for (i=0; i<4*4; i++)
00077         weights[i] = h_weights[i>>2];
00078 
00079     __asm__ volatile(
00080     "pxor %%mm7, %%mm7                   \n\t"
00081     "movq "MANGLE(ff_pw_64)", %%mm6      \n\t"
00082     "1:                                  \n\t"
00083     DIAG4_MMX(-1,0,1,2)
00084     "add  $8, %1                         \n\t"
00085     "add  %3, %0                         \n\t"
00086     "decl %4                             \n\t"
00087     "jnz 1b                              \n\t"
00088     : "+r"(src), "+r"(t)
00089     : "r"(weights), "r"((x86_reg)stride), "r"(11)
00090     : "memory");
00091 
00092     t = tmp + 8;
00093     for (i=0; i<4*4; i++)
00094         weights[i] = v_weights[i>>2];
00095 
00096     __asm__ volatile(
00097     "pxor %%mm7, %%mm7                   \n\t"
00098     "movq "MANGLE(ff_pw_64)", %%mm6      \n\t"
00099     "1:                                  \n\t"
00100     DIAG4_MMX(-8,0,8,16)
00101     "add  $8, %0                         \n\t"
00102     "add  %3, %1                         \n\t"
00103     "decl %4                             \n\t"
00104     "jnz 1b                              \n\t"
00105     : "+r"(t), "+r"(dst)
00106     : "r"(weights), "r"((x86_reg)stride), "r"(8)
00107     : "memory");
00108 }

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