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/*
*
* rgb2rgb.c, Software RGB to RGB convertor
* Written by Nick Kurshev.
*/
#include <inttypes.h>
#include "../config.h"
#include "rgb2rgb.h"
#include "../mmx_defs.h"
#ifdef HAVE_MMX
static const uint64_t mask32 __attribute__((aligned(8))) = 0x00FFFFFF00FFFFFFULL;
static const uint64_t mask24l __attribute__((aligned(8))) = 0x0000000000FFFFFFULL;
static const uint64_t mask24h __attribute__((aligned(8))) = 0x0000FFFFFF000000ULL;
static const uint64_t mask15b __attribute__((aligned(8))) = 0x001F001F001F001FULL; /* 00000000 00011111 xxB */
static const uint64_t mask15rg __attribute__((aligned(8))) = 0x7FE07FE07FE07FE0ULL; /* 01111111 11100000 RGx */
#endif
void rgb24to32(const uint8_t *src,uint8_t *dst,uint32_t src_size)
{
uint8_t *dest = dst;
const uint8_t *s = src;
const uint8_t *end;
#ifdef HAVE_MMX
uint8_t *mm_end;
#endif
end = s + src_size;
#ifdef HAVE_MMX
__asm __volatile(PREFETCH" %0"::"m"(*s):"memory");
mm_end = (uint8_t*)((((unsigned long)end)/(MMREG_SIZE*2))*(MMREG_SIZE*2));
__asm __volatile("movq %0, %%mm7"::"m"(mask32):"memory");
if(mm_end == end) mm_end -= MMREG_SIZE*2;
while(s < mm_end)
{
__asm __volatile(
PREFETCH" 32%1\n\t"
"movd %1, %%mm0\n\t"
"movd 3%1, %%mm1\n\t"
"movd 6%1, %%mm2\n\t"
"movd 9%1, %%mm3\n\t"
"punpckldq %%mm1, %%mm0\n\t"
"punpckldq %%mm3, %%mm2\n\t"
"pand %%mm7, %%mm0\n\t"
"pand %%mm7, %%mm2\n\t"
MOVNTQ" %%mm0, %0\n\t"
MOVNTQ" %%mm2, 8%0"
:"=m"(*dest)
:"m"(*s)
:"memory");
dest += 16;
s += 12;
}
__asm __volatile(SFENCE:::"memory");
__asm __volatile(EMMS:::"memory");
#endif
while(s < end)
{
*dest++ = *s++;
*dest++ = *s++;
*dest++ = *s++;
*dest++ = 0;
}
}
void rgb32to24(const uint8_t *src,uint8_t *dst,uint32_t src_size)
{
uint8_t *dest = dst;
const uint8_t *s = src;
const uint8_t *end;
#ifdef HAVE_MMX
uint8_t *mm_end;
#endif
end = s + src_size;
#ifdef HAVE_MMX
__asm __volatile(PREFETCH" %0"::"m"(*s):"memory");
mm_end = (uint8_t*)((((unsigned long)end)/(MMREG_SIZE*2))*(MMREG_SIZE*2));
__asm __volatile(
"movq %0, %%mm7\n\t"
"movq %1, %%mm6"
::"m"(mask24l),"m"(mask24h):"memory");
if(mm_end == end) mm_end -= MMREG_SIZE*2;
while(s < mm_end)
{
__asm __volatile(
PREFETCH" 32%1\n\t"
"movq %1, %%mm0\n\t"
"movq 8%1, %%mm1\n\t"
"movq %%mm0, %%mm2\n\t"
"movq %%mm1, %%mm3\n\t"
"psrlq $8, %%mm2\n\t"
"psrlq $8, %%mm3\n\t"
"pand %%mm7, %%mm0\n\t"
"pand %%mm7, %%mm1\n\t"
"pand %%mm6, %%mm2\n\t"
"pand %%mm6, %%mm3\n\t"
"por %%mm2, %%mm0\n\t"
"por %%mm3, %%mm1\n\t"
MOVNTQ" %%mm0, %0\n\t"
MOVNTQ" %%mm1, 6%0"
:"=m"(*dest)
:"m"(*s)
:"memory");
dest += 12;
s += 16;
}
__asm __volatile(SFENCE:::"memory");
__asm __volatile(EMMS:::"memory");
#endif
while(s < end)
{
*dest++ = *s++;
*dest++ = *s++;
*dest++ = *s++;
s++;
}
}
/*
Original by Strepto/Astral
ported to gcc & bugfixed : A'rpi
MMX2, 3DNOW optimization by Nick Kurshev
*/
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
}
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