ext/opt_random.h
// Optimizations for random number extensions, x86 version -*- C++ -*-
// Copyright (C) 2012-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option)
// any later version.
// This library 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file ext/random.tcc
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{ext/random}
*/
#ifndef _EXT_OPT_RANDOM_H
#define _EXT_OPT_RANDOM_H 1
#pragma GCC system_header
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#ifdef __SSE2__
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace {
template<size_t __sl1, size_t __sl2, size_t __sr1, size_t __sr2,
uint32_t __msk1, uint32_t __msk2, uint32_t __msk3, uint32_t __msk4>
inline __m128i __sse2_recursion(__m128i __a, __m128i __b,
__m128i __c, __m128i __d)
{
__m128i __y = _mm_srli_epi32(__b, __sr1);
__m128i __z = _mm_srli_si128(__c, __sr2);
__m128i __v = _mm_slli_epi32(__d, __sl1);
__z = _mm_xor_si128(__z, __a);
__z = _mm_xor_si128(__z, __v);
__m128i __x = _mm_slli_si128(__a, __sl2);
__y = _mm_and_si128(__y, _mm_set_epi32(__msk4, __msk3, __msk2, __msk1));
__z = _mm_xor_si128(__z, __x);
return _mm_xor_si128(__z, __y);
}
}
#define _GLIBCXX_OPT_HAVE_RANDOM_SFMT_GEN_READ 1
template<typename _UIntType, size_t __m,
size_t __pos1, size_t __sl1, size_t __sl2,
size_t __sr1, size_t __sr2,
uint32_t __msk1, uint32_t __msk2,
uint32_t __msk3, uint32_t __msk4,
uint32_t __parity1, uint32_t __parity2,
uint32_t __parity3, uint32_t __parity4>
void simd_fast_mersenne_twister_engine<_UIntType, __m,
__pos1, __sl1, __sl2, __sr1, __sr2,
__msk1, __msk2, __msk3, __msk4,
__parity1, __parity2, __parity3,
__parity4>::
_M_gen_rand(void)
{
__m128i __r1 = _mm_load_si128(&_M_state[_M_nstate - 2]);
__m128i __r2 = _mm_load_si128(&_M_state[_M_nstate - 1]);
size_t __i;
for (__i = 0; __i < _M_nstate - __pos1; ++__i)
{
__m128i __r = __sse2_recursion<__sl1, __sl2, __sr1, __sr2,
__msk1, __msk2, __msk3, __msk4>
(_M_state[__i], _M_state[__i + __pos1], __r1, __r2);
_mm_store_si128(&_M_state[__i], __r);
__r1 = __r2;
__r2 = __r;
}
for (; __i < _M_nstate; ++__i)
{
__m128i __r = __sse2_recursion<__sl1, __sl2, __sr1, __sr2,
__msk1, __msk2, __msk3, __msk4>
(_M_state[__i], _M_state[__i + __pos1 - _M_nstate], __r1, __r2);
_mm_store_si128(&_M_state[__i], __r);
__r1 = __r2;
__r2 = __r;
}
_M_pos = 0;
}
#define _GLIBCXX_OPT_HAVE_RANDOM_SFMT_OPERATOREQUAL 1
template<typename _UIntType, size_t __m,
size_t __pos1, size_t __sl1, size_t __sl2,
size_t __sr1, size_t __sr2,
uint32_t __msk1, uint32_t __msk2,
uint32_t __msk3, uint32_t __msk4,
uint32_t __parity1, uint32_t __parity2,
uint32_t __parity3, uint32_t __parity4>
bool
operator==(const __gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType,
__m, __pos1, __sl1, __sl2, __sr1, __sr2,
__msk1, __msk2, __msk3, __msk4,
__parity1, __parity2, __parity3, __parity4>& __lhs,
const __gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType,
__m, __pos1, __sl1, __sl2, __sr1, __sr2,
__msk1, __msk2, __msk3, __msk4,
__parity1, __parity2, __parity3, __parity4>& __rhs)
{
__m128i __res = _mm_cmpeq_epi8(__lhs._M_state[0], __rhs._M_state[0]);
for (size_t __i = 1; __i < __lhs._M_nstate; ++__i)
__res = _mm_and_si128(__res, _mm_cmpeq_epi8(__lhs._M_state[__i],
__rhs._M_state[__i]));
return (_mm_movemask_epi8(__res) == 0xffff
&& __lhs._M_pos == __rhs._M_pos);
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif // __SSE2__
#endif // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#endif // _EXT_OPT_RANDOM_H