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add 3dnow support

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@478 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
pontscho 2001-04-16 20:55:27 +00:00
parent 22ad1b8599
commit ebe63858a9
1 changed files with 61 additions and 1 deletions
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62
libvo/fastmemcpy.h
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@ -1,3 +1,7 @@
#ifndef __MPLAYER_MEMCPY
#define __MPLAYER_MEMCPY
/*
This part of code was taken by from Linux-2.4.3 and slightly modified
for MMX2 instruction set. I have done it since linux uses page aligned
@ -5,7 +9,12 @@ blocks but mplayer uses weakly ordered data and original sources can not
speedup their. Only using prefetchnta and movntq together have effect!
If you have questions please contact with me: Nick Kurshev: nickols_k@mail.ru.
*/
#ifdef HAVE_MMX2
// 3dnow memcpy support from kernel 2.4.2
// by Pontscho/fresh!mindworkz
#if defined( HAVE_MMX2 ) || defined( HAVE_3DNOW )
/* for small memory blocks (<256 bytes) this version is faster */
#define small_memcpy(to,from,n)\
{\
@ -27,11 +36,19 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
len&=63;
__asm__ __volatile__ (
#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
"prefetch (%0)\n"
"prefetch 64(%0)\n"
"prefetch 128(%0)\n"
"prefetch 192(%0)\n"
"prefetch 256(%0)\n"
#else
"prefetchnta (%0)\n"
"prefetchnta 64(%0)\n"
"prefetchnta 128(%0)\n"
"prefetchnta 192(%0)\n"
"prefetchnta 256(%0)\n"
#endif
: : "r" (from) );
/*
This algorithm is top effective when the code consequently
@ -45,7 +62,11 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
for(; i>0; i--)
{
__asm__ __volatile__ (
#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
"prefetch 320(%0)\n"
#else
"prefetchnta 320(%0)\n"
#endif
#ifdef HAVE_SSE /* Only P3 (may be Cyrix3) */
"movups (%0), %%xmm0\n"
"movups 16(%0), %%xmm1\n"
@ -56,6 +77,24 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
"movntps %%xmm0, 32(%1)\n"
"movntps %%xmm1, 48(%1)\n"
#else /* Only K7 (may be other) */
#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
"movq (%0), %%mm0\n"
"movq 8(%0), %%mm1\n"
"movq 16(%0), %%mm2\n"
"movq 24(%0), %%mm3\n"
"movq %%mm0, (%1)\n"
"movq %%mm1, 8(%1)\n"
"movq %%mm2, 16(%1)\n"
"movq %%mm3, 24(%1)\n"
"movq 32(%0), %%mm0\n"
"movq 40(%0), %%mm1\n"
"movq 48(%0), %%mm2\n"
"movq 56(%0), %%mm3\n"
"movq %%mm0, 32(%1)\n"
"movq %%mm1, 40(%1)\n"
"movq %%mm2, 48(%1)\n"
"movq %%mm3, 56(%1)\n"
#else
"movq (%0), %%mm0\n"
"movq 8(%0), %%mm1\n"
"movq 16(%0), %%mm2\n"
@ -72,20 +111,41 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
"movntq %%mm1, 40(%1)\n"
"movntq %%mm2, 48(%1)\n"
"movntq %%mm3, 56(%1)\n"
#endif
#endif
:: "r" (from), "r" (to) : "memory");
from+=64;
to+=64;
}
#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
__asm__ __volatile__ ("femms":::"memory");
#else
__asm__ __volatile__ ("emms":::"memory");
#endif
}
/*
* Now do the tail of the block
*/
#if 0
small_memcpy(to, from, len);
#else
__asm__ __volatile__ (
"shrl $1,%%ecx\n"
"jnc 1f\n"
"movsb\n"
"1:\n"
"shrl $1,%%ecx\n"
"jnc 2f\n"
"movsw\n"
"2:\n"
"rep ; movsl\n"
::"D" (to), "S" (from),"c" (len)
: "memory");
#endif
return p;
}
#define memcpy(a,b,c) fast_memcpy(a,b,c)
#endif