static void SDL_BlitCopy(SDL_BlitInfo *info)
{
Uint8 *src, *dst;
int w, h;
int srcskip, dstskip;
w = info->d_width*info->dst->BytesPerPixel;
h = info->d_height;
src = info->s_pixels;
dst = info->d_pixels;
srcskip = w+info->s_skip;
dstskip = w+info->d_skip;
#ifdef MMX_ASMBLIT
if(SDL_HasSSE())
{
while ( h-- ) {
SDL_memcpySSE(dst, src, w);
src += srcskip;
dst += dstskip;
}
__asm__ __volatile__ (
" emms\n"
::);
}
else
if(SDL_HasMMX())
{
while ( h-- ) {
SDL_memcpyMMX(dst, src, w);
src += srcskip;
dst += dstskip;
}
__asm__ __volatile__ (
" emms\n"
::);
}
else
#endif
while ( h-- ) {
SDL_memcpySHMIN(dst, src, w);
// SDL_memcpy(dst, src, w);
src += srcskip;
dst += dstskip;
}
}
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static void SDL_memcpySHMIN(Uint8 *to, const Uint8 *from, int len)
{
int i;
unsigned long *lsrc ,*ldst;
lsrc =(unsigned long *)from;
ldst =(unsigned long *)to;
for(i=0; i<len/8; i++) {
*ldst++ = *lsrc++;
*ldst++ = *lsrc++;
}
if (len&7)
SDL_memcpy(to, from, len&7);
}
#ifdef MMX_ASMBLIT
static __inline__ void SDL_memcpyMMX(Uint8 *to, const Uint8 *from, int len)
{
int i;
for(i=0; i<len/8; i++) {
__asm__ __volatile__ (
" movq (%0), %%mm0\n"
" movq %%mm0, (%1)\n"
: : "r" (from), "r" (to) : "memory");
from+=8;
to+=8;
}
if (len&7)
SDL_memcpy(to, from, len&7);
}
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