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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
static LONGLONG mpeg3_MMX_601_Y_COEF = 0x0000004000400040;
inline void mpeg3_601_mmx(unsigned long y,
unsigned long *output)
{
asm("
/* Output will be 0x00rrggbb */
movd (%0), %%mm0; /* Load y 0x00000000000000yy */
/* pmullw mpeg3_MMX_601_Y_COEF, %%mm0; // Scale y 0x00000000000000yy */
psllw $6, %%mm0; /* Shift y coeffs 0x0000yyy0yyy0yyy0 */
movd %%mm0, (%1); /* Store output */
"
:
: "r" (&y), "r" (output));
}
int main(int argc, char *argv[])
{
unsigned char output[1024];
memset(output, 0, 1024);
mpeg3_601_mmx(1, (unsigned long*)output);
printf("%02x%02x\n", *(unsigned char*)&output[1], *(unsigned char*)&output[0]);
}
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