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/**
* @namespace biewlib
* @file biewlib/sysdep/ia32/aclib.c
* @brief This file contains functions which are expand are improve
* standard C library ones.
* @version -
* @remark this source file is part of Binary vIEW project (BIEW).
* The Binary vIEW (BIEW) is copyright (C) 1995 Nick Kurshev.
* All rights reserved. This software is redistributable under the
* licence given in the file "Licence.en" ("Licence.ru" in russian
* translation) distributed in the BIEW archive.
* @note Requires POSIX compatible development system
* @remark I used such form of this file because of build-in assembler
* allow write calling convention independed code. In addition,
* GNU C compiler is ported under multiple OS's. If somebody will
* port it under ABC-xyz platform, then more easy find compiler
* with build-in assembler, instead rewriting of makefile with .s
* (or .asm) extensions for choosen development system.
*
* @author Nick Kurshev
* @since 2001
* @note Development, fixes and improvements
**/
#include <stddef.h>
#include <string.h>
#include "biewlib/sysdep/ia32/fastcopy.h"
#include "biewlib/sysdep/ia32/stdint.h"
#include "biewlib/sysdep/ia32/_inlines.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 CAN_COMPILE_X86_GAS
#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
#define USE_MMX 0x00000001UL
#define USE_MMX2 0x00000002UL
#define USE_3DNOW 0x00000004UL
#define USE_3DNOW2 0x00000008UL
#define USE_SSE 0x00000010UL
#define USE_SSE2 0x00000020UL
#ifdef CAN_COMPILE_X86_ASM
static int _mmx_inited=0;
static unsigned __mmx_caps=0;
static inline void do_cpuid(unsigned int ax, unsigned int *p)
{
int a, c;
__asm__ __volatile__ (
/* See if CPUID instruction is supported ... */
/* ... Get copies of EFLAGS into eax and ecx */
"pushf\n\t"
"popl %0\n\t"
"movl %0, %1\n\t"
/* ... Toggle the ID bit in one copy and store */
/* to the EFLAGS reg */
"xorl $0x200000, %0\n\t"
"push %0\n\t"
"popf\n\t"
/* ... Get the (hopefully modified) EFLAGS */
"pushf\n\t"
"popl %0\n\t"
: "=a" (a), "=c" (c)
:
: "cc"
);
if(a!=c)
__asm __volatile
("movl %%ebx, %%esi\n\t"
"cpuid\n\t"
"xchgl %%ebx, %%esi"
: "=a" (p[0]), "=S" (p[1]),
"=c" (p[2]), "=d" (p[3])
: "0" (ax));
else p[0]=p[1]=p[2]=p[3]=ax=0;
}
static void GetCpuCaps( void )
{
unsigned int regs[4];
unsigned int regs2[4];
_mmx_inited=1;
__mmx_caps = 0;
do_cpuid(0x00000000, regs); /* get _max_ cpuid level and vendor name*/
if (regs[0]>=0x00000001)
{
do_cpuid(0x00000001, regs2);
/* general feature flags: */
if((regs2[3] & (1 << 23 )) >> 23) __mmx_caps |= USE_MMX;
if((regs2[3] & (1 << 25 )) >> 25) __mmx_caps |= USE_SSE;
if((regs2[3] & (1 << 26 )) >> 26) __mmx_caps |= USE_SSE2;
if(__mmx_caps & USE_SSE) __mmx_caps |= USE_MMX2; /* SSE cpus supports mmxext too */
}
do_cpuid(0x80000000, regs);
if (regs[0]>=0x80000001) {
do_cpuid(0x80000001, regs2);
if((regs2[3] & (1 << 23 )) >> 23) __mmx_caps |= USE_MMX;
if((regs2[3] & (1 << 22 )) >> 22) __mmx_caps |= USE_MMX2;
if((regs2[3] & (1 << 31 )) >> 31) __mmx_caps |= USE_3DNOW;
if((regs2[3] & (1 << 30 )) >> 30) __mmx_caps |= USE_3DNOW2;
}
}
#else
static int _mmx_inited=1;
static unsigned __mmx_caps=0;
static void GetCpuCaps( void ) {}
#endif
#ifdef CAN_COMPILE_X86_ASM
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#undef HAVE_SSE
#define RENAME(a) a ## _C
#ifdef __MSDOS__
#include "biewlib/sysdep/ia32/aclib_~1.c"
#else
#include "biewlib/sysdep/ia32/aclib_template.c"
#endif
//MMX versions
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#define RENAME(a) a ## _MMX
#ifdef __MSDOS__
#include "biewlib/sysdep/ia32/aclib_~1.c"
#else
#include "biewlib/sysdep/ia32/aclib_template.c"
#endif
#if 0 /* TODO: better detection of gas possibilities */
//MMX2 versions
#undef RENAME
#define HAVE_MMX
#define HAVE_MMX2
#undef HAVE_3DNOW
#define RENAME(a) a ## _MMX2
#ifdef __MSDOS__
#include "biewlib/sysdep/ia32/aclib_~1.c"
#else
#include "biewlib/sysdep/ia32/aclib_template.c"
#endif
//3DNOW versions
#undef RENAME
#define HAVE_MMX
#undef HAVE_MMX2
#define HAVE_3DNOW
#define RENAME(a) a ## _3DNow
#ifdef __MSDOS__
#include "biewlib/sysdep/ia32/aclib_~1.c"
#else
#include "biewlib/sysdep/ia32/aclib_template.c"
#endif
#endif
#endif // CAN_COMPILE_X86_ASM
static void * init_fast_memcpy(void * to, const void * from, size_t len)
{
#ifdef CAN_COMPILE_X86_ASM
/* ordered per speed fastest first */
if(!_mmx_inited) GetCpuCaps();
// if(__mmx_caps & USE_MMX2) fast_memcpy_ptr = fast_memcpy_MMX2;
// else if(__mmx_caps & USE_3DNOW) fast_memcpy_ptr = fast_memcpy_3DNow;
else if(__mmx_caps & USE_MMX) fast_memcpy_ptr = fast_memcpy_MMX;
else
#endif
fast_memcpy_ptr = memcpy;
return (*fast_memcpy_ptr)(to,from,len);
}
void *(*fast_memcpy_ptr)(void * to, const void * from, size_t len) = init_fast_memcpy;
static void * init_fast_memset(void * to, int filler, size_t len)
{
#ifdef CAN_COMPILE_X86_ASM
/* ordered per speed fastest first */
if(!_mmx_inited) GetCpuCaps();
// if(__mmx_caps & USE_MMX2) fast_memset_ptr = fast_memset_MMX2;
// else if(__mmx_caps & USE_3DNOW) fast_memset_ptr = fast_memset_3DNow;
else if(__mmx_caps & USE_MMX) fast_memset_ptr = fast_memset_MMX;
else
#endif
fast_memset_ptr = memset;
return (*fast_memset_ptr)(to,filler,len);
}
void *(*fast_memset_ptr)(void * to, int filler, size_t len) = init_fast_memset;
static void __FASTCALL__ init_InterleaveBuffers(tUInt32 limit,
void *destbuffer,
const void *evenbuffer,
const void *oddbuffer)
{
#ifdef CAN_COMPILE_X86_ASM
/* ordered per speed fastest first */
if(!_mmx_inited) GetCpuCaps();
// if(__mmx_caps & USE_MMX2) InterleaveBuffers_ptr = InterleaveBuffers_MMX2;
// else if(__mmx_caps & USE_3DNOW) InterleaveBuffers_ptr = InterleaveBuffers_3DNow;
else if(__mmx_caps & USE_MMX) InterleaveBuffers_ptr = InterleaveBuffers_MMX;
else
#endif
InterleaveBuffers_ptr = InterleaveBuffers_C;
(*InterleaveBuffers_ptr)(limit,destbuffer,evenbuffer,oddbuffer);
}
void __FASTCALL__ (*InterleaveBuffers_ptr)(tUInt32 limit,
void *destbuffer,
const void *evenbuffer,
const void *oddbuffer) = init_InterleaveBuffers;
static void __FASTCALL__ init_CharsToShorts(tUInt32 limit,
void *destbuffer,
const void *evenbuffer)
{
#ifdef CAN_COMPILE_X86_ASM
/* ordered per speed fastest first */
if(!_mmx_inited) GetCpuCaps();
// if(__mmx_caps & USE_MMX2) CharsToShorts_ptr = CharsToShorts_MMX2;
// else if(__mmx_caps & USE_3DNOW) CharsToShorts_ptr = CharsToShorts_3DNow;
else if(__mmx_caps & USE_MMX) CharsToShorts_ptr = CharsToShorts_MMX;
else
#endif
CharsToShorts_ptr = CharsToShorts_C;
(*CharsToShorts_ptr)(limit,destbuffer,evenbuffer);
}
void __FASTCALL__ (*CharsToShorts_ptr)(tUInt32 limit,
void *destbuffer,
const void *evenbuffer) = init_CharsToShorts;
static void __FASTCALL__ init_ShortsToChars(tUInt32 limit,
void *destbuffer,
const void *evenbuffer)
{
#ifdef CAN_COMPILE_X86_ASM
/* ordered per speed fastest first */
if(!_mmx_inited) GetCpuCaps();
// if(__mmx_caps & USE_MMX2) ShortsToChars_ptr = ShortsToChars_MMX2;
// else if(__mmx_caps & USE_3DNOW) ShortsToChars_ptr = ShortsToChars_3DNow;
else if(__mmx_caps & USE_MMX) ShortsToChars_ptr = ShortsToChars_MMX;
else
#endif
ShortsToChars_ptr = ShortsToChars_C;
(*ShortsToChars_ptr)(limit,destbuffer,evenbuffer);
}
void __FASTCALL__ (*ShortsToChars_ptr)(tUInt32 limit,
void *destbuffer,
const void *evenbuffer) = init_ShortsToChars;
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