func: static inline int RENAME(yuv420_rgb16)(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*2 > FFABS(dstStride[0])) h_size-=8;
  
  
  
      __asm__ __volatile__ ("pxor %mm4, %mm4;" /* zero mm4 */ );
  
  //printf("%X %X %X %X %X %X %X %X %X %X\n", (int)&c->redDither, (int)&b5Dither, (int)src[0], (int)src[1], (int)src[2], (int)dst[0],
  
  //srcStride[0],srcStride[1],srcStride[2],dstStride[0]);
  
      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;
  
  
  
  	b5Dither= dither8[y&1];
  
  	g6Dither= dither4[y&1];
  
  	g5Dither= dither8[y&1];
  
  	r5Dither= dither8[(y+1)&1];
  
  	    /* 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"
  
  /* no speed diference on my p3@500 with prefetch,
  
   * if it is faster for anyone with -benchmark then tell me
  
  			PREFETCH" 64(%0) \n\t"
  
  			PREFETCH" 64(%1) \n\t"
  
  			PREFETCH" 64(%2) \n\t"
  
  */
  
  YUV2RGB
  
  
  
  #ifdef DITHER1XBPP
  
  			"paddusb "MANGLE(b5Dither)", %%mm0;"
  
  			"paddusb "MANGLE(g6Dither)", %%mm2;"
  
  			"paddusb "MANGLE(r5Dither)", %%mm1;"
  
  #endif
  
  		     /* mask unneeded bits off */
  
  		     "pand "MANGLE(mmx_redmask)", %%mm0;" /* b7b6b5b4 b3_0_0_0 b7b6b5b4 b3_0_0_0 */
  
  		     "pand "MANGLE(mmx_grnmask)", %%mm2;" /* g7g6g5g4 g3g2_0_0 g7g6g5g4 g3g2_0_0 */
  
  		     "pand "MANGLE(mmx_redmask)", %%mm1;" /* r7r6r5r4 r3_0_0_0 r7r6r5r4 r3_0_0_0 */
  
  
  
  		     "psrlw $3,%%mm0;" /* 0_0_0_b7 b6b5b4b3 0_0_0_b7 b6b5b4b3 */
  
  		     "pxor %%mm4, %%mm4;" /* zero mm4 */
  
  
  
  		     "movq %%mm0, %%mm5;" /* Copy B7-B0 */
  
  		     "movq %%mm2, %%mm7;" /* Copy G7-G0 */
  
  
  
  		     /* convert rgb24 plane to rgb16 pack for pixel 0-3 */
  
  		     "punpcklbw %%mm4, %%mm2;" /* 0_0_0_0 0_0_0_0 g7g6g5g4 g3g2_0_0 */
  
  		     "punpcklbw %%mm1, %%mm0;" /* r7r6r5r4 r3_0_0_0 0_0_0_b7 b6b5b4b3 */
  
  
  
  		     "psllw $3, %%mm2;" /* 0_0_0_0 0_g7g6g5 g4g3g2_0 0_0_0_0 */
  
  		     "por %%mm2, %%mm0;" /* r7r6r5r4 r3g7g6g5 g4g3g2b7 b6b5b4b3 */
  
  
  
  		     "movq 8 (%5, %0, 2), %%mm6;" /* Load 8 Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */
  
  		     MOVNTQ " %%mm0, (%1);" /* store pixel 0-3 */
  
  
  
  		     /* convert rgb24 plane to rgb16 pack for pixel 0-3 */
  
  		     "punpckhbw %%mm4, %%mm7;" /* 0_0_0_0 0_0_0_0 g7g6g5g4 g3g2_0_0 */
  
  		     "punpckhbw %%mm1, %%mm5;" /* r7r6r5r4 r3_0_0_0 0_0_0_b7 b6b5b4b3 */
  
  
  
  		     "psllw $3, %%mm7;" /* 0_0_0_0 0_g7g6g5 g4g3g2_0 0_0_0_0 */
  
  		     "movd 4 (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */
  
  
  
  		     "por %%mm7, %%mm5;" /* r7r6r5r4 r3g7g6g5 g4g3g2b7 b6b5b4b3 */
  
  		     "movd 4 (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */
  
  
  
  		     MOVNTQ " %%mm5, 8 (%1);" /* store pixel 4-7 */
  
  
  
  		     "add $16, %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;
  
  }
  