::"r"(src+srcStride), "r"(ydst+lumStride), "r"(udst), "r"(vdst), "r" (chromWidth)
::"r"(src), "r"(ydst), "r"(udst), "r"(vdst), "r" (chromWidth)
void yuy2toyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,	unsigned int width, unsigned int height,	unsigned int lumStride, unsigned int chromStride, unsigned int srcStride){	int y;	const int chromWidth= width>>1;	for(y=0; y<height; y+=2)	{#ifdef HAVE_MMX		asm volatile(			"xorl %%eax, %%eax		\n\t"			"pcmpeqw %%mm7, %%mm7		\n\t"			"psrlw $8, %%mm7		\n\t" // FF,00,FF,00...			".balign 16			\n\t"			"1:				\n\t"			PREFETCH" 64(%0, %%eax, 4)	\n\t"			"movq (%0, %%eax, 4), %%mm0	\n\t" // YUYV YUYV(0)			"movq 8(%0, %%eax, 4), %%mm1	\n\t" // YUYV YUYV(4)			"movq %%mm0, %%mm2		\n\t" // YUYV YUYV(0)			"movq %%mm1, %%mm3		\n\t" // YUYV YUYV(4)			"psrlw $8, %%mm0		\n\t" // U0V0 U0V0(0)			"psrlw $8, %%mm1		\n\t" // U0V0 U0V0(4)			"pand %%mm7, %%mm2		\n\t" // Y0Y0 Y0Y0(0)			"pand %%mm7, %%mm3		\n\t" // Y0Y0 Y0Y0(4)			"packuswb %%mm1, %%mm0		\n\t" // UVUV UVUV(0)			"packuswb %%mm3, %%mm2		\n\t" // YYYY YYYY(0)			MOVNTQ" %%mm2, (%1, %%eax, 2)	\n\t"			"movq 16(%0, %%eax, 4), %%mm1	\n\t" // YUYV YUYV(8)			"movq 24(%0, %%eax, 4), %%mm2	\n\t" // YUYV YUYV(12)			"movq %%mm1, %%mm3		\n\t" // YUYV YUYV(8)			"movq %%mm2, %%mm4		\n\t" // YUYV YUYV(12)			"psrlw $8, %%mm1		\n\t" // U0V0 U0V0(8)			"psrlw $8, %%mm2		\n\t" // U0V0 U0V0(12)			"pand %%mm7, %%mm3		\n\t" // Y0Y0 Y0Y0(8)			"pand %%mm7, %%mm4		\n\t" // Y0Y0 Y0Y0(12)			"packuswb %%mm2, %%mm1		\n\t" // UVUV UVUV(8)			"packuswb %%mm4, %%mm3		\n\t" // YYYY YYYY(8)			MOVNTQ" %%mm3, 8(%1, %%eax, 2)	\n\t"			"movq %%mm0, %%mm2		\n\t" // UVUV UVUV(0)			"movq %%mm1, %%mm3		\n\t" // UVUV UVUV(8)			"psrlw $8, %%mm0		\n\t" // V0V0 V0V0(0)			"psrlw $8, %%mm1		\n\t" // V0V0 V0V0(8)			"pand %%mm7, %%mm2		\n\t" // U0U0 U0U0(0)			"pand %%mm7, %%mm3		\n\t" // U0U0 U0U0(8)			"packuswb %%mm1, %%mm0		\n\t" // VVVV VVVV(0)			"packuswb %%mm3, %%mm2		\n\t" // UUUU UUUU(0)			MOVNTQ" %%mm0, (%3, %%eax)	\n\t"			MOVNTQ" %%mm2, (%2, %%eax)	\n\t"			"addl $8, %%eax			\n\t"			"cmpl %4, %%eax			\n\t"			" jb 1b				\n\t"			::"r"(src), "r"(ydst), "r"(udst), "r"(vdst), "r" (chromWidth)			: "memory", "%eax"		);		asm volatile(			"xorl %%eax, %%eax		\n\t"			".balign 16			\n\t"			"1:				\n\t"			PREFETCH" 64(%0, %%eax, 4)	\n\t"			"movq (%0, %%eax, 4), %%mm0	\n\t" // YUYV YUYV(0)			"movq 8(%0, %%eax, 4), %%mm1	\n\t" // YUYV YUYV(4)			"movq 16(%0, %%eax, 4), %%mm2	\n\t" // YUYV YUYV(8)			"movq 24(%0, %%eax, 4), %%mm3	\n\t" // YUYV YUYV(12)			"pand %%mm7, %%mm0		\n\t" // Y0Y0 Y0Y0(0)			"pand %%mm7, %%mm1		\n\t" // Y0Y0 Y0Y0(4)			"pand %%mm7, %%mm2		\n\t" // Y0Y0 Y0Y0(8)			"pand %%mm7, %%mm3		\n\t" // Y0Y0 Y0Y0(12)			"packuswb %%mm1, %%mm0		\n\t" // YYYY YYYY(0)			"packuswb %%mm3, %%mm2		\n\t" // YYYY YYYY(8)			MOVNTQ" %%mm0, (%1, %%eax, 2)	\n\t"			MOVNTQ" %%mm2, 8(%1, %%eax, 2)	\n\t"			"addl $8, %%eax			\n\t"			"cmpl %4, %%eax			\n\t"			" jb 1b				\n\t"			::"r"(src+srcStride), "r"(ydst+lumStride), "r"(udst), "r"(vdst), "r" (chromWidth)			: "memory", "%eax"		);#else		int i;		for(i=0; i<chromWidth; i++)		{			ydst[2*i+0] 	= src[4*i+0];			udst[i] 	= src[4*i+1];			ydst[2*i+1] 	= src[4*i+2];			vdst[i] 	= src[4*i+3];		}		ydst += lumStride;		src  += srcStride;		for(i=0; i<chromWidth; i++)		{			ydst[2*i+0] 	= src[4*i+0];			ydst[2*i+1] 	= src[4*i+2];		}#endif		udst += chromStride;		vdst += chromStride;		ydst += lumStride;		src  += srcStride;	}#ifdef HAVE_MMXasm(    EMMS" \n\t"        SFENCE" \n\t"        :::"memory");#endif}