void rgb15to16(const uint8_t *src,uint8_t *dst,uint32_t src_size) { #ifdef HAVE_MMX register const char* s=src+src_size; register char* d=dst+src_size; register int offs=-src_size; __asm __volatile(PREFETCH" %0"::"m"(*(s+offs)):"memory"); __asm __volatile( "movq %0, %%mm4\n\t" "movq %1, %%mm5" ::"m"(mask15b), "m"(mask15rg):"memory"); while(offs<0) { __asm __volatile( PREFETCH" 32%1\n\t" "movq %1, %%mm0\n\t" "movq 8%1, %%mm2\n\t" "movq %%mm0, %%mm1\n\t" "movq %%mm2, %%mm3\n\t" "pand %%mm4, %%mm0\n\t" "pand %%mm5, %%mm1\n\t" "pand %%mm4, %%mm2\n\t" "pand %%mm5, %%mm3\n\t" "psllq $1, %%mm1\n\t" "psllq $1, %%mm3\n\t" "por %%mm1, %%mm0\n\t" "por %%mm3, %%mm2\n\t" MOVNTQ" %%mm0, %0\n\t" MOVNTQ" %%mm2, 8%0" :"=m"(*(d+offs)) :"m"(*(s+offs)) :"memory"); offs+=16; } __asm __volatile(SFENCE:::"memory"); __asm __volatile(EMMS:::"memory"); #else const uint16_t *s1=( uint16_t * )src; uint16_t *d1=( uint16_t * )dst; uint16_t *e=((uint8_t *)s1)+src_size; while( s1<e ){ register int x=*( s1++ ); /* rrrrrggggggbbbbb 0rrrrrgggggbbbbb 0111 1111 1110 0000=0x7FE0 00000000000001 1111=0x001F */ *( d1++ )=( x&0x001F )|( ( x&0x7FE0 )<<1 ); } #endif }