libmpeg3/video/worksheet.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <time.h>
   4
   5
   6 static long long  mpeg3_MMX_601_Y_COEF = 0x0000004000400040;
   7
   8 inline void mpeg3_601_mmx(unsigned long y,
   9                 unsigned long *output)
  10 {
  11 asm("
  12 /* Output will be 0x00rrggbb */
  13         movd (%0), %%mm0;          /* Load y   0x00000000000000yy */
  14 /*      pmullw mpeg3_MMX_601_Y_COEF, %%mm0;   // Scale y   0x00000000000000yy */
  15         psllw $6, %%mm0;                /* Shift y coeffs 0x0000yyy0yyy0yyy0 */
  16         movd %%mm0, (%1);          /* Store output */
  17         "
  18 :
  19 : "r" (&y), "r" (output));
  20 }
  21
  22
  23 int main(int argc, char *argv[])
  24 {
  25         unsigned char output[1024];
  26
  27         memset(output, 0, 1024);
  28         mpeg3_601_mmx(1, (unsigned long*)output);
  29         printf("%02x%02x\n", *(unsigned char*)&output[1], *(unsigned char*)&output[0]);
  30 }