Moving fast_memcpy to separate file (Size optimization)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@699 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 2 insertions, 233 deletions

diff --git a/libvo/fastmemcpy.h b/libvo/fastmemcpy.h
index b6dcb38f45..d61f72b239 100644
--- a/libvo/fastmemcpy.h
+++ b/libvo/fastmemcpy.h
@@ -1,242 +1,11 @@
 #ifndef __MPLAYER_MEMCPY
 #define __MPLAYER_MEMCPY 1
 
-#ifdef USE_FASTMEMCPY
-#include <stddef.h>
-
-// Enable this code, if SSE version works (faster) for you!
-#if 0
-#ifdef HAVE_SSE
-#define FASTMEMCPY_SSE
-#endif
-#endif
-
-/*
- This part of code was taken by from Linux-2.4.3 and slightly modified
-for MMX, MMX2, SSE instruction set. I have done it since linux uses page aligned
-blocks but mplayer uses weakly ordered data and original sources can not
-speedup them. Only using PREFETCHNTA and MOVNTQ together have effect!
-
->From IA-32 Intel Architecture Software Developer's Manual Volume 1,
-
-Order Number 245470:
-"10.4.6. Cacheability Control, Prefetch, and Memory Ordering Instructions"
-
-Data referenced by a program can be temporal (data will be used again) or
-non-temporal (data will be referenced once and not reused in the immediate
-future). To make efficient use of the processor's caches, it is generally
-desirable to cache temporal data and not cache non-temporal data. Overloading
-the processor's caches with non-temporal data is sometimes referred to as
-"polluting the caches".
-The non-temporal data is written to memory with Write-Combining semantics.
-
-The PREFETCHh instructions permits a program to load data into the processor
-at a suggested cache level, so that it is closer to the processors load and
-store unit when it is needed. If the data is already present in a level of
-the cache hierarchy that is closer to the processor, the PREFETCHh instruction
-will not result in any data movement.
-But we should you PREFETCHNTA: Non-temporal data fetch data into location
-close to the processor, minimizing cache pollution.
-
-The MOVNTQ (store quadword using non-temporal hint) instruction stores
-packed integer data from an MMX register to memory, using a non-temporal hint.
-The MOVNTPS (store packed single-precision floating-point values using
-non-temporal hint) instruction stores packed floating-point data from an
-XMM register to memory, using a non-temporal hint.
-
-The SFENCE (Store Fence) instruction controls write ordering by creating a
-fence for memory store operations. This instruction guarantees that the results
-of every store instruction that precedes the store fence in program order is
-globally visible before any store instruction that follows the fence. The
-SFENCE instruction provides an efficient way of ensuring ordering between
-procedures that produce weakly-ordered data and procedures that consume that
-data.
-
-If you have questions please contact with me: Nick Kurshev: nickols_k@mail.ru.
-*/
-
-// 3dnow memcpy support from kernel 2.4.2
-//  by Pontscho/fresh!mindworkz
-
 #if defined( HAVE_MMX2 ) || defined( HAVE_3DNOW ) || defined( HAVE_MMX )
+#include <stddef.h>
 
-#undef HAVE_MMX1
-#if defined(HAVE_MMX) && !defined(HAVE_MMX2) && !defined(HAVE_3DNOW) && !defined(FASTMEMCPY_SSE)
-/*  means: mmx v.1. Note: Since we added alignment of destinition it speedups
-    of memory copying on PentMMX, Celeron-1 and P2 upto 12% versus
-    standard (non MMX-optimized) version.
-    Note: on K6-2+ it speedups memory copying upto 25% and
-          on K7 and P3 about 500% (5 times). */
-#define HAVE_MMX1
-#endif
-
-
-#undef HAVE_K6_2PLUS
-#if !defined( HAVE_MMX2) && defined( HAVE_3DNOW)
-#define HAVE_K6_2PLUS
-#endif
-
-/* for small memory blocks (<256 bytes) this version is faster */
-#define small_memcpy(to,from,n)\
-{\
-__asm__ __volatile__(\
-        "rep; movsb"\
-        :"=D"(to), "=S"(from), "=c"(n)\
-/* It's most portable way to notify compiler */\
-/* that edi, esi and ecx are clobbered in asm block. */\
-/* Thanks to A'rpi for hint!!! */\
-        :"0" (to), "1" (from),"2" (n)\
-        : "memory");\
-}
-
-#ifdef FASTMEMCPY_SSE
-#define MMREG_SIZE 16
-#else
-#define MMREG_SIZE 8
-#endif
-
-/* Small defines (for readability only) ;) */
-#ifdef HAVE_K6_2PLUS
-#define PREFETCH "prefetch"
-/* On K6 femms is faster of emms. On K7 femms is directly mapped on emms. */
-#define EMMS     "femms"
-#else
-#define PREFETCH "prefetchnta"
-#define EMMS     "emms"
-#endif
-
-#ifdef HAVE_MMX2
-#define MOVNTQ "movntq"
-#else
-#define MOVNTQ "movq"
-#endif
-
-inline static void * fast_memcpy(void * to, const void * from, size_t len)
-{
-         void *retval;
-         int i;
-         retval = to;
-        if(len >= 0x200) /* 512-byte blocks */
-         {
-          register unsigned long int delta;
-          /* Align destinition to MMREG_SIZE -boundary */
-          delta = ((unsigned long int)to)&(MMREG_SIZE-1);
-          if(delta)
-          {
-            delta=MMREG_SIZE-delta;
-            len -= delta;
-            small_memcpy(to, from, delta);
-          }
-          i = len >> 6; /* len/64 */
-          len&=63;
-
-#ifndef HAVE_MMX1
-         __asm__ __volatile__ (
-                PREFETCH" (%0)\n"
-                PREFETCH" 64(%0)\n"
-                PREFETCH" 128(%0)\n"
-                PREFETCH" 192(%0)\n"
-                PREFETCH" 256(%0)\n"
-                : : "r" (from) );
-#endif
-        /*
-           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.
-        */
-#ifdef FASTMEMCPY_SSE /* Only P3 (may be Cyrix3) */
-         if(((unsigned long)from) & 15)
-         /* if SRC is misaligned */
-         for(; i>0; i--)
-         {
-                 __asm__ __volatile__ (
-                 PREFETCH" 320(%0)\n"
-                 "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"
-                 :: "r" (from), "r" (to) : "memory");
-                 ((const unsigned char *)from)+=64;
-                 ((unsigned char *)to)+=64;
-         }
-         else
-         /*
-           Only if SRC is aligned on 16-byte boundary.
-           It allows to use movaps instead of movups, which required data
-           to be aligned or a general-protection exception (#GP) is generated.
-         */
-         for(; i>0; i--)
-         {
-                 __asm__ __volatile__ (
-                 PREFETCH" 320(%0)\n"
-                 "movaps (%0), %%xmm0\n"
-                 "movaps 16(%0), %%xmm1\n"
-                 "movntps %%xmm0, (%1)\n"
-                 "movntps %%xmm1, 16(%1)\n"
-                 "movaps 32(%0), %%xmm0\n"
-                 "movaps 48(%0), %%xmm1\n"
-                 "movntps %%xmm0, 32(%1)\n"
-                 "movntps %%xmm1, 48(%1)\n"
-                 :: "r" (from), "r" (to) : "memory");
-                 ((const unsigned char *)from)+=64;
-                 ((unsigned char *)to)+=64;
-         }
-#else
-         for(; i>0; i--)
-         {
-                 __asm__ __volatile__ (
-#ifndef HAVE_MMX1
-                 PREFETCH" 320(%0)\n"
-#endif
-                 "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"
-                 :: "r" (from), "r" (to) : "memory");
-                 ((const unsigned char *)from)+=64;
-                 ((unsigned char *)to)+=64;
-         }
-#endif /* Have SSE */
-#ifdef HAVE_MMX2
-                /* since movntq is weakly-ordered, a "sfence"
-                 * is needed to become ordered again. */
-                 __asm__ __volatile__ ("sfence":::"memory");
-#endif
-#ifndef FASTMEMCPY_SSE
-                 /* enables to use FPU */
-                 __asm__ __volatile__ (EMMS:::"memory");
-#endif
-         }
-         /*
-         *      Now do the tail of the block
-         */
-         if(len) small_memcpy(to, from, len);
-         return retval;
-}
+extern void * fast_memcpy(void * to, const void * from, size_t len);
 #define memcpy(a,b,c) fast_memcpy(a,b,c)
-#undef small_memcpy
-
-#endif
 
 #endif