mpv/libvo/aclib.c

#include "../config.h"
#ifdef USE_FASTMEMCPY

/*
  aclib - advanced C library ;)
  This file contains functions which improve and expand standard C-library
  see aclib_template.c ... this file only contains runtime cpu detection and config options stuff
  runtime cpu detection by michael niedermayer (michaelni@gmx.at) is under GPL
*/
#include <stddef.h>
#include "../cpudetect.h"

#define BLOCK_SIZE 4096
#define CONFUSION_FACTOR 0
//Feel free to fine-tune the above 2, it might be possible to get some speedup with them :)

//#define STATISTICS

#ifdef ARCH_X86
#define CAN_COMPILE_X86_ASM
#endif

//Note: we have MMX, MMX2, 3DNOW version there is no 3DNOW+MMX2 one
//Plain C versions
//#if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT)
//#define COMPILE_C
//#endif

#ifdef CAN_COMPILE_X86_ASM

#if (defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
#define COMPILE_MMX
#endif

#if defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
#define COMPILE_MMX2
#endif

#if (defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
#define COMPILE_3DNOW
#endif

#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#undef ARCH_X86
/*
#ifdef COMPILE_C
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#undef ARCH_X86
#define RENAME(a) a ## _C
#include "aclib_template.c"
#endif
*/
//MMX versions
#ifdef COMPILE_MMX
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _MMX
#include "aclib_template.c"
#endif

//MMX2 versions
#ifdef COMPILE_MMX2
#undef RENAME
#define HAVE_MMX
#define HAVE_MMX2
#undef HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _MMX2
#include "aclib_template.c"
#endif

//3DNOW versions
#ifdef COMPILE_3DNOW
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#define HAVE_3DNOW
#define ARCH_X86
#define RENAME(a) a ## _3DNow
#include "aclib_template.c"
#endif

#endif // CAN_COMPILE_X86_ASM


inline void * fast_memcpy(void * to, const void * from, size_t len)
{
#ifdef RUNTIME_CPUDETECT
#ifdef CAN_COMPILE_X86_ASM
	// ordered per speed fasterst first
	if(gCpuCaps.hasMMX2)
		fast_memcpy_MMX2(to, from, len);
	else if(gCpuCaps.has3DNow)
		fast_memcpy_3DNow(to, from, len);
	else if(gCpuCaps.hasMMX)
		fast_memcpy_MMX(to, from, len);
	else
#endif //CAN_COMPILE_X86_ASM
		memcpy(to, from, len); // prior to mmx we use the standart memcpy
#else
#ifdef HAVE_MMX2
		fast_memcpy_MMX2(to, from, len);
#elif defined (HAVE_3DNOW)
		fast_memcpy_3DNow(to, from, len);
#elif defined (HAVE_MMX)
		fast_memcpy_MMX(to, from, len);
#else
		memcpy(to, from, len); // prior to mmx we use the standart memcpy
#endif

#endif //!RUNTIME_CPUDETECT
}

#endif /* use fastmemcpy */