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