mirror of
https://github.com/nzbget/nzbget.git
synced 2025-12-26 15:47:44 -05:00
130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
/*
|
|
* Based on node-yencode library by Anime Tosho:
|
|
* https://github.com/animetosho/node-yencode
|
|
*
|
|
* Copyright (C) 2017 Anime Tosho (animetosho)
|
|
* Copyright (C) 2017 Andrey Prygunkov <hugbug@users.sourceforge.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
|
|
#include "nzbget.h"
|
|
|
|
#if (defined(__i686__) || defined(__amd64__)) && !defined(WIN32)
|
|
#include <cpuid.h>
|
|
#endif
|
|
|
|
#include "YEncode.h"
|
|
|
|
namespace YEncode
|
|
{
|
|
|
|
int (*decode)(const unsigned char**, unsigned char**, size_t, YencDecoderState*) = nullptr;
|
|
extern void init_decode_scalar();
|
|
bool decode_simd = false;
|
|
|
|
void (*crc_init)(crc_state *const s) = nullptr;
|
|
void (*crc_incr)(crc_state *const s, const unsigned char *src, long len) = nullptr;
|
|
uint32_t (*crc_finish)(crc_state *const s) = nullptr;
|
|
extern void init_crc_slice();
|
|
bool crc_simd = false;
|
|
|
|
#if defined(__i686__) || defined(__amd64__)
|
|
extern void init_decode_sse2();
|
|
extern void init_decode_ssse3();
|
|
extern void init_crc_pclmul();
|
|
|
|
class CpuId
|
|
{
|
|
uint32_t regs[4];
|
|
public:
|
|
CpuId(unsigned level)
|
|
{
|
|
#ifdef WIN32
|
|
__cpuid((int *)regs, (int)level);
|
|
#else
|
|
__cpuid(level, regs[0], regs[1], regs[2], regs[3]);
|
|
#endif
|
|
}
|
|
const uint32_t &EAX() const {return regs[0];}
|
|
const uint32_t &EBX() const {return regs[1];}
|
|
const uint32_t &ECX() const {return regs[2];}
|
|
const uint32_t &EDX() const {return regs[3];}
|
|
};
|
|
#endif
|
|
|
|
#if defined(__arm__) || defined(__aarch64__)
|
|
extern void init_decode_neon();
|
|
extern void init_crc_acle();
|
|
#endif
|
|
|
|
void init()
|
|
{
|
|
init_decode_scalar();
|
|
init_crc_slice();
|
|
|
|
#if defined(__i686__) || defined(__amd64__)
|
|
CpuId cpuid(1);
|
|
|
|
bool cpu_supports_sse2 = cpuid.EDX() & 0x04000000;
|
|
bool cpu_supports_ssse3 = cpuid.ECX() & 0x00000200;
|
|
bool cpu_supports_sse41 = cpuid.ECX() & 0x00080000;
|
|
bool cpu_supports_pclmul = cpuid.ECX() & 0x00000002;
|
|
|
|
if (cpu_supports_sse2)
|
|
{
|
|
init_decode_sse2();
|
|
}
|
|
if (cpu_supports_ssse3)
|
|
{
|
|
init_decode_ssse3();
|
|
}
|
|
if (cpu_supports_sse41 && cpu_supports_pclmul)
|
|
{
|
|
init_crc_pclmul();
|
|
}
|
|
#endif
|
|
|
|
#if defined(__arm__) || defined(__aarch64__)
|
|
bool cpu_supports_neon = false;
|
|
bool cpu_supports_crc = false;
|
|
|
|
#ifdef __linux__
|
|
if (FILE* file = fopen("/proc/cpuinfo", "r"))
|
|
{
|
|
char buf[200];
|
|
while (fgets(buf, sizeof(buf), file))
|
|
{
|
|
cpu_supports_neon |= !strncasecmp(buf, "Features", 8) &&
|
|
(strstr(buf, " neon ") || strstr(buf, " asimd "));
|
|
cpu_supports_crc |= !strncasecmp(buf, "Features", 8) && strstr(buf, " crc32 ");
|
|
}
|
|
fclose(file);
|
|
}
|
|
#endif
|
|
|
|
if (cpu_supports_neon)
|
|
{
|
|
init_decode_neon();
|
|
}
|
|
if (cpu_supports_crc)
|
|
{
|
|
init_crc_acle();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
}
|