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// Optimizations for random number extensions, x86 version -*- C++ -*- |
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|
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// Copyright (C) 2012-2021 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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|
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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|
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file ext/random.tcc |
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* This is an internal header file, included by other library headers. |
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* Do not attempt to use it directly. @headername{ext/random} |
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*/ |
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|
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#ifndef _EXT_OPT_RANDOM_H |
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#define _EXT_OPT_RANDOM_H 1 |
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|
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#pragma GCC system_header |
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|
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
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|
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#ifdef __SSE2__ |
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|
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namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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namespace { |
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|
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template<size_t __sl1, size_t __sl2, size_t __sr1, size_t __sr2, |
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uint32_t __msk1, uint32_t __msk2, uint32_t __msk3, uint32_t __msk4> |
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inline __m128i __sse2_recursion(__m128i __a, __m128i __b, |
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__m128i __c, __m128i __d) |
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{ |
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__m128i __y = _mm_srli_epi32(__b, __sr1); |
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__m128i __z = _mm_srli_si128(__c, __sr2); |
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__m128i __v = _mm_slli_epi32(__d, __sl1); |
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__z = _mm_xor_si128(__z, __a); |
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__z = _mm_xor_si128(__z, __v); |
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__m128i __x = _mm_slli_si128(__a, __sl2); |
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__y = _mm_and_si128(__y, _mm_set_epi32(__msk4, __msk3, __msk2, __msk1)); |
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__z = _mm_xor_si128(__z, __x); |
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return _mm_xor_si128(__z, __y); |
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} |
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|
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} |
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|
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|
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#define _GLIBCXX_OPT_HAVE_RANDOM_SFMT_GEN_READ 1 |
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template<typename _UIntType, size_t __m, |
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size_t __pos1, size_t __sl1, size_t __sl2, |
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size_t __sr1, size_t __sr2, |
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uint32_t __msk1, uint32_t __msk2, |
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uint32_t __msk3, uint32_t __msk4, |
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uint32_t __parity1, uint32_t __parity2, |
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uint32_t __parity3, uint32_t __parity4> |
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void simd_fast_mersenne_twister_engine<_UIntType, __m, |
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__pos1, __sl1, __sl2, __sr1, __sr2, |
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__msk1, __msk2, __msk3, __msk4, |
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__parity1, __parity2, __parity3, |
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__parity4>:: |
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_M_gen_rand(void) |
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{ |
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__m128i __r1 = _mm_load_si128(&_M_state[_M_nstate - 2]); |
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__m128i __r2 = _mm_load_si128(&_M_state[_M_nstate - 1]); |
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|
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size_t __i; |
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for (__i = 0; __i < _M_nstate - __pos1; ++__i) |
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{ |
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__m128i __r = __sse2_recursion<__sl1, __sl2, __sr1, __sr2, |
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__msk1, __msk2, __msk3, __msk4> |
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(_M_state[__i], _M_state[__i + __pos1], __r1, __r2); |
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_mm_store_si128(&_M_state[__i], __r); |
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__r1 = __r2; |
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__r2 = __r; |
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} |
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for (; __i < _M_nstate; ++__i) |
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{ |
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__m128i __r = __sse2_recursion<__sl1, __sl2, __sr1, __sr2, |
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__msk1, __msk2, __msk3, __msk4> |
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(_M_state[__i], _M_state[__i + __pos1 - _M_nstate], __r1, __r2); |
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_mm_store_si128(&_M_state[__i], __r); |
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__r1 = __r2; |
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__r2 = __r; |
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} |
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|
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_M_pos = 0; |
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} |
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|
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|
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#define _GLIBCXX_OPT_HAVE_RANDOM_SFMT_OPERATOREQUAL 1 |
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template<typename _UIntType, size_t __m, |
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size_t __pos1, size_t __sl1, size_t __sl2, |
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size_t __sr1, size_t __sr2, |
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uint32_t __msk1, uint32_t __msk2, |
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uint32_t __msk3, uint32_t __msk4, |
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uint32_t __parity1, uint32_t __parity2, |
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uint32_t __parity3, uint32_t __parity4> |
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bool |
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operator==(const __gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType, |
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__m, __pos1, __sl1, __sl2, __sr1, __sr2, |
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__msk1, __msk2, __msk3, __msk4, |
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__parity1, __parity2, __parity3, __parity4>& __lhs, |
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const __gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType, |
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__m, __pos1, __sl1, __sl2, __sr1, __sr2, |
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__msk1, __msk2, __msk3, __msk4, |
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__parity1, __parity2, __parity3, __parity4>& __rhs) |
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{ |
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__m128i __res = _mm_cmpeq_epi8(__lhs._M_state[0], __rhs._M_state[0]); |
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for (size_t __i = 1; __i < __lhs._M_nstate; ++__i) |
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__res = _mm_and_si128(__res, _mm_cmpeq_epi8(__lhs._M_state[__i], |
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__rhs._M_state[__i])); |
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return (_mm_movemask_epi8(__res) == 0xffff |
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&& __lhs._M_pos == __rhs._M_pos); |
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} |
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|
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|
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_GLIBCXX_END_NAMESPACE_VERSION |
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} // namespace |
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|
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#endif // __SSE2__ |
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|
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#endif // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
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|
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#endif // _EXT_OPT_RANDOM_H |
