func: static inline void RENAME(yuy2ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1, uint8_t *src2, long width)
  
  {
  
  #ifdef HAVE_MMX
  
  	asm volatile(
  
  		"movq "MANGLE(bm01010101)", %%mm4\n\t"
  
  		"mov %0, %%"REG_a"		\n\t"
  
  		"1:				\n\t"
  
  		"movq (%1, %%"REG_a",4), %%mm0	\n\t"
  
  		"movq 8(%1, %%"REG_a",4), %%mm1	\n\t"
  
  		"psrlw $8, %%mm0		\n\t"
  
  		"psrlw $8, %%mm1		\n\t"
  
  		"packuswb %%mm1, %%mm0		\n\t"
  
  		"movq %%mm0, %%mm1		\n\t"
  
  		"psrlw $8, %%mm0		\n\t"
  
  		"pand %%mm4, %%mm1		\n\t"
  
  		"packuswb %%mm0, %%mm0		\n\t"
  
  		"packuswb %%mm1, %%mm1		\n\t"
  
  		"movd %%mm0, (%3, %%"REG_a")	\n\t"
  
  		"movd %%mm1, (%2, %%"REG_a")	\n\t"
  
  		"add $4, %%"REG_a"		\n\t"
  
  		" js 1b				\n\t"
  
  		: : "g" (-width), "r" (src1+width*4), "r" (dstU+width), "r" (dstV+width)
  
  		: "%"REG_a
  
  	);
  
  #else
  
  	int i;
  
  	for(i=0; i<width; i++)
  
  	{
  
  		dstU[i]= src1[4*i + 1];
  
  		dstV[i]= src1[4*i + 3];
  
  	}
  
  #endif
  
          assert(src1 == src2);
  
  }
  