func: static inline int RENAME(yuv420_rgb24)(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
  
               int srcSliceH, uint8_t* dst[], int dstStride[]){
  
      int y, h_size;
  
  
  
      if(c->srcFormat == PIX_FMT_YUV422P){
  
  	srcStride[1] *= 2;
  
  	srcStride[2] *= 2;
  
      }
  
  
  
      h_size= (c->dstW+7)&~7;
  
      if(h_size*3 > dstStride[0]) h_size-=8;
  
      
  
      __asm__ __volatile__ ("pxor %mm4, %mm4;" /* zero mm4 */ );
  
  
  
      for (y= 0; y<srcSliceH; y++ ) {
  
  	uint8_t *_image = dst[0] + (y+srcSliceY)*dstStride[0];
  
  	uint8_t *_py = src[0] + y*srcStride[0];
  
  	uint8_t *_pu = src[1] + (y>>1)*srcStride[1];
  
  	uint8_t *_pv = src[2] + (y>>1)*srcStride[2];
  
  	long index= -h_size/2;
  
  
  
  	    /* this mmx assembly code deals with SINGLE scan line at a time, it convert 8
  
  	       pixels in each iteration */
  
  	    __asm__ __volatile__ (
  
  	/* load data for start of next scan line */
  
  		     "movd (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */
  
  		     "movd (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */
  
  		     "movq (%5, %0, 2), %%mm6;" /* Load 8  Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */
  
  //		    ".balign 16			\n\t"
  
  		    "1:				\n\t"
  
  YUV2RGB
  
  	/* mm0=B, %%mm2=G, %%mm1=R */
  
  #ifdef HAVE_MMX2
  
  			"movq "MANGLE(M24A)", %%mm4	\n\t"
  
  			"movq "MANGLE(M24C)", %%mm7	\n\t"
  
  			"pshufw $0x50, %%mm0, %%mm5	\n\t" /* B3 B2 B3 B2  B1 B0 B1 B0 */
  
  			"pshufw $0x50, %%mm2, %%mm3	\n\t" /* G3 G2 G3 G2  G1 G0 G1 G0 */
  
  			"pshufw $0x00, %%mm1, %%mm6	\n\t" /* R1 R0 R1 R0  R1 R0 R1 R0 */
  
  
  
  			"pand %%mm4, %%mm5		\n\t" /*    B2        B1       B0 */
  
  			"pand %%mm4, %%mm3		\n\t" /*    G2        G1       G0 */
  
  			"pand %%mm7, %%mm6		\n\t" /*       R1        R0       */
  
  
  
  			"psllq $8, %%mm3		\n\t" /* G2        G1       G0    */
  
  			"por %%mm5, %%mm6		\n\t"
  
  			"por %%mm3, %%mm6		\n\t"
  
  			MOVNTQ" %%mm6, (%1)		\n\t"
  
  
  
  			"psrlq $8, %%mm2		\n\t" /* 00 G7 G6 G5  G4 G3 G2 G1 */
  
  			"pshufw $0xA5, %%mm0, %%mm5	\n\t" /* B5 B4 B5 B4  B3 B2 B3 B2 */
  
  			"pshufw $0x55, %%mm2, %%mm3	\n\t" /* G4 G3 G4 G3  G4 G3 G4 G3 */
  
  			"pshufw $0xA5, %%mm1, %%mm6	\n\t" /* R5 R4 R5 R4  R3 R2 R3 R2 */
  
  
  
  			"pand "MANGLE(M24B)", %%mm5	\n\t" /* B5       B4        B3    */
  
  			"pand %%mm7, %%mm3		\n\t" /*       G4        G3       */
  
  			"pand %%mm4, %%mm6		\n\t" /*    R4        R3       R2 */
  
  
  
  			"por %%mm5, %%mm3		\n\t" /* B5    G4 B4     G3 B3    */
  
  			"por %%mm3, %%mm6		\n\t"
  
  			MOVNTQ" %%mm6, 8(%1)		\n\t"
  
  
  
  			"pshufw $0xFF, %%mm0, %%mm5	\n\t" /* B7 B6 B7 B6  B7 B6 B6 B7 */
  
  			"pshufw $0xFA, %%mm2, %%mm3	\n\t" /* 00 G7 00 G7  G6 G5 G6 G5 */
  
  			"pshufw $0xFA, %%mm1, %%mm6	\n\t" /* R7 R6 R7 R6  R5 R4 R5 R4 */
  
  			"movd 4 (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */
  
  
  
  			"pand %%mm7, %%mm5		\n\t" /*       B7        B6       */
  
  			"pand %%mm4, %%mm3		\n\t" /*    G7        G6       G5 */
  
  			"pand "MANGLE(M24B)", %%mm6	\n\t" /* R7       R6        R5    */
  
  			"movd 4 (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */
  
  \
  
  			"por %%mm5, %%mm3		\n\t"
  
  			"por %%mm3, %%mm6		\n\t"
  
  			MOVNTQ" %%mm6, 16(%1)		\n\t"
  
  			"movq 8 (%5, %0, 2), %%mm6;" /* Load 8 Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */
  
  			"pxor %%mm4, %%mm4		\n\t"
  
  
  
  #else
  
  
  
  			"pxor %%mm4, %%mm4		\n\t"
  
  			"movq %%mm0, %%mm5		\n\t" /* B */
  
  			"movq %%mm1, %%mm6		\n\t" /* R */
  
  			"punpcklbw %%mm2, %%mm0		\n\t" /* GBGBGBGB 0 */
  
  			"punpcklbw %%mm4, %%mm1		\n\t" /* 0R0R0R0R 0 */
  
  			"punpckhbw %%mm2, %%mm5		\n\t" /* GBGBGBGB 2 */
  
  			"punpckhbw %%mm4, %%mm6		\n\t" /* 0R0R0R0R 2 */
  
  			"movq %%mm0, %%mm7		\n\t" /* GBGBGBGB 0 */
  
  			"movq %%mm5, %%mm3		\n\t" /* GBGBGBGB 2 */
  
  			"punpcklwd %%mm1, %%mm7		\n\t" /* 0RGB0RGB 0 */
  
  			"punpckhwd %%mm1, %%mm0		\n\t" /* 0RGB0RGB 1 */
  
  			"punpcklwd %%mm6, %%mm5		\n\t" /* 0RGB0RGB 2 */
  
  			"punpckhwd %%mm6, %%mm3		\n\t" /* 0RGB0RGB 3 */
  
  
  
  			"movq %%mm7, %%mm2		\n\t" /* 0RGB0RGB 0 */
  
  			"movq %%mm0, %%mm6		\n\t" /* 0RGB0RGB 1 */
  
  			"movq %%mm5, %%mm1		\n\t" /* 0RGB0RGB 2 */
  
  			"movq %%mm3, %%mm4		\n\t" /* 0RGB0RGB 3 */
  
  
  
  			"psllq $40, %%mm7		\n\t" /* RGB00000 0 */
  
  			"psllq $40, %%mm0		\n\t" /* RGB00000 1 */
  
  			"psllq $40, %%mm5		\n\t" /* RGB00000 2 */
  
  			"psllq $40, %%mm3		\n\t" /* RGB00000 3 */
  
  
  
  			"punpckhdq %%mm2, %%mm7		\n\t" /* 0RGBRGB0 0 */
  
  			"punpckhdq %%mm6, %%mm0		\n\t" /* 0RGBRGB0 1 */
  
  			"punpckhdq %%mm1, %%mm5		\n\t" /* 0RGBRGB0 2 */
  
  			"punpckhdq %%mm4, %%mm3		\n\t" /* 0RGBRGB0 3 */
  
  
  
  			"psrlq $8, %%mm7		\n\t" /* 00RGBRGB 0 */
  
  			"movq %%mm0, %%mm6		\n\t" /* 0RGBRGB0 1 */
  
  			"psllq $40, %%mm0		\n\t" /* GB000000 1 */
  
  			"por %%mm0, %%mm7		\n\t" /* GBRGBRGB 0 */
  
  			MOVNTQ" %%mm7, (%1)		\n\t"
  
  
  
  			"movd 4 (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */
  
  
  
  			"psrlq $24, %%mm6		\n\t" /* 0000RGBR 1 */
  
  			"movq %%mm5, %%mm1		\n\t" /* 0RGBRGB0 2 */
  
  			"psllq $24, %%mm5		\n\t" /* BRGB0000 2 */
  
  			"por %%mm5, %%mm6		\n\t" /* BRGBRGBR 1 */
  
  			MOVNTQ" %%mm6, 8(%1)		\n\t"
  
  
  
  			"movq 8 (%5, %0, 2), %%mm6;" /* Load 8 Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */
  
  
  
  			"psrlq $40, %%mm1		\n\t" /* 000000RG 2 */
  
  			"psllq $8, %%mm3		\n\t" /* RGBRGB00 3 */
  
  			"por %%mm3, %%mm1		\n\t" /* RGBRGBRG 2 */
  
  			MOVNTQ" %%mm1, 16(%1)		\n\t"
  
  
  
  			"movd 4 (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */
  
  			"pxor %%mm4, %%mm4		\n\t"
  
  #endif
  
  		     
  
  		     "add $24, %1			\n\t"
  
  		     "add $4, %0			\n\t"
  
  		     " js 1b				\n\t"
  
  		     
  
  		     : "+r" (index), "+r" (_image)
  
  		     : "r" (_pu - index), "r" (_pv - index), "r"(&c->redDither), "r" (_py - 2*index)
  
  		     );
  
      }
  
  
  
      __asm__ __volatile__ (EMMS);
  
      return srcSliceH;
  
  }
  