www.pudn.com > NETVIDEO.rar > worksheet.c

#include  
#include  
#include  
 
 
static long long  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]); 
}