POWERPC_TBL_START_COUNT(altivec_avg_pixels8_num, 1);
POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);
void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h){POWERPC_TBL_DECLARE(altivec_avg_pixels8_num, 1);#ifdef ALTIVEC_USE_REFERENCE_C_CODE    int i;POWERPC_TBL_START_COUNT(altivec_avg_pixels8_num, 1);    for (i = 0; i < h; i++) {        *((uint32_t *) (block)) =            (((*((uint32_t *) (block))) |              ((((const struct unaligned_32 *) (pixels))->l))) -             ((((*((uint32_t *) (block))) ^                ((((const struct unaligned_32 *) (pixels))->                  l))) & 0xFEFEFEFEUL) >> 1));        *((uint32_t *) (block + 4)) =            (((*((uint32_t *) (block + 4))) |              ((((const struct unaligned_32 *) (pixels + 4))->l))) -             ((((*((uint32_t *) (block + 4))) ^                ((((const struct unaligned_32 *) (pixels +                                                  4))->                  l))) & 0xFEFEFEFEUL) >> 1));        pixels += line_size;        block += line_size;    }POWERPC_TBL_STOP_COUNT(altivec_avg_pixels8_num, 1);#else /* ALTIVEC_USE_REFERENCE_C_CODE */    register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;    int i;POWERPC_TBL_START_COUNT(altivec_avg_pixels8_num, 1);    for (i = 0; i < h; i++) {     /*       block is 8 bytes-aligned, so we're either in the       left block (16 bytes-aligned) or in the right block (not)     */     int rightside = ((unsigned long)block & 0x0000000F);          blockv = vec_ld(0, block);     pixelsv1 = vec_ld(0, (unsigned char*)pixels);     pixelsv2 = vec_ld(16, (unsigned char*)pixels);     pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));          if (rightside)     {       pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));     }     else     {       pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));     }          blockv = vec_avg(blockv, pixelsv);     vec_st(blockv, 0, block);          pixels += line_size;     block += line_size;   }   POWERPC_TBL_STOP_COUNT(altivec_avg_pixels8_num, 1); #endif /* ALTIVEC_USE_REFERENCE_C_CODE */}