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// Optimizations for random number extensions, x86 version -*- C++ -*- // Copyright (C) 2012-2018 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

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