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- applied SSE patch by Nick Kurshev

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@410 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmosfear 2001-04-14 17:56:44 +00:00
parent 39a20fba34
commit 0fc60fe28c
1 changed files with 44 additions and 47 deletions
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91
libvo/fastmemcpy.h
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@ -27,60 +27,57 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
len&=63;
__asm__ __volatile__ (
"1: prefetchnta (%0)\n" /* This set is 28 bytes */
" prefetchnta 64(%0)\n"
" prefetchnta 128(%0)\n"
" prefetchnta 192(%0)\n"
" prefetchnta 256(%0)\n"
#if 0
"2: \n"
".section .fixup, \"ax\"\n"
"3: movw $0x1AEB, 1b\n" /* jmp on 26 bytes */
" jmp 2b\n"
".previous\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 1b, 3b\n"
".previous"
#endif
"prefetchnta (%0)\n"
"prefetchnta 64(%0)\n"
"prefetchnta 128(%0)\n"
"prefetchnta 192(%0)\n"
"prefetchnta 256(%0)\n"
: : "r" (from) );
/*
This algorithm is top effective when the code consequently
reads and writes blocks which have size of cache line.
Size of cache line is processor-dependent.
It will, however, be a minimum of 32 bytes on any processors.
It would be better to have a number of instructions which
perform reading and writing to be multiple to a number of
processor's decoders, but it's not always possible.
*/
for(; i>0; i--)
{
__asm__ __volatile__ (
"1: prefetchnta 320(%0)\n"
"2: movq (%0), %%mm0\n"
" movq 8(%0), %%mm1\n"
" movq 16(%0), %%mm2\n"
" movq 24(%0), %%mm3\n"
" movntq %%mm0, (%1)\n"
" movntq %%mm1, 8(%1)\n"
" movntq %%mm2, 16(%1)\n"
" movntq %%mm3, 24(%1)\n"
" movq 32(%0), %%mm0\n"
" movq 40(%0), %%mm1\n"
" movq 48(%0), %%mm2\n"
" movq 56(%0), %%mm3\n"
" movntq %%mm0, 32(%1)\n"
" movntq %%mm1, 40(%1)\n"
" movntq %%mm2, 48(%1)\n"
" movntq %%mm3, 56(%1)\n"
#if 0
".section .fixup, \"ax\"\n"
"3: movw $0x05EB, 1b\n" /* jmp on 5 bytes */
" jmp 2b\n"
".previous\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 1b, 3b\n"
".previous"
#endif
: : "r" (from), "r" (to) : "memory");
"prefetchnta 320(%0)\n"
#ifdef HAVE_SSE /* Only P3 (may be Cyrix3) */
"movups (%0), %%xmm0\n"
"movups 16(%0), %%xmm1\n"
"movntps %%xmm0, (%1)\n"
"movntps %%xmm1, 16(%1)\n"
"movups 32(%0), %%xmm0\n"
"movups 48(%0), %%xmm1\n"
"movntps %%xmm0, 32(%1)\n"
"movntps %%xmm1, 48(%1)\n"
#else /* Only K7 (may be other) */
"movq (%0), %%mm0\n"
"movq 8(%0), %%mm1\n"
"movq 16(%0), %%mm2\n"
"movq 24(%0), %%mm3\n"
"movntq %%mm0, (%1)\n"
"movntq %%mm1, 8(%1)\n"
"movntq %%mm2, 16(%1)\n"
"movntq %%mm3, 24(%1)\n"
"movq 32(%0), %%mm0\n"
"movq 40(%0), %%mm1\n"
"movq 48(%0), %%mm2\n"
"movq 56(%0), %%mm3\n"
"movntq %%mm0, 32(%1)\n"
"movntq %%mm1, 40(%1)\n"
"movntq %%mm2, 48(%1)\n"
"movntq %%mm3, 56(%1)\n"
#endif
:: "r" (from), "r" (to) : "memory");
from+=64;
to+=64;
}
__asm__ __volatile__ ("emms":::"memory");
__asm__ __volatile__ ("emms":::"memory");
}
/*
* Now do the tail of the block