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// Random number extensions -*- 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
* This file is a GNU extension to the Standard C++ Library.
*/
#ifndef _EXT_RANDOM
#define _EXT_RANDOM 1
#pragma GCC system_header
#include <random>
#ifdef __SSE2__
# include <x86intrin.h>
#endif
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
/* Mersenne twister implementation optimized for vector operations.
*
* Reference: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/
*/
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>
class simd_fast_mersenne_twister_engine
{
static_assert(std::is_unsigned<_UIntType>::value, "template argument "
"substituting _UIntType not an unsigned integral type");
static_assert(__sr1 < 32, "first right shift too large");
static_assert(__sr2 < 16, "second right shift too large");
static_assert(__sl1 < 32, "first left shift too large");
static_assert(__sl2 < 16, "second left shift too large");
public:
typedef _UIntType result_type;
private:
static constexpr size_t m_w = sizeof(result_type) * 8;
static constexpr size_t _M_nstate = __m / 128 + 1;
static constexpr size_t _M_nstate32 = _M_nstate * 4;
static_assert(std::is_unsigned<_UIntType>::value, "template argument "
"substituting _UIntType not an unsigned integral type");
static_assert(__pos1 < _M_nstate, "POS1 not smaller than state size");
static_assert(16 % sizeof(_UIntType) == 0,
"UIntType size must divide 16");
public:
static constexpr size_t state_size = _M_nstate * (16
/ sizeof(result_type));
static constexpr result_type default_seed = 5489u;
// constructors and member function
explicit
simd_fast_mersenne_twister_engine(result_type __sd = default_seed)
{ seed(__sd); }
template<typename _Sseq, typename = typename
std::enable_if<!std::is_same<_Sseq, simd_fast_mersenne_twister_engine>::value>
::type>
explicit
simd_fast_mersenne_twister_engine(_Sseq& __q)
{ seed(__q); }
void
seed(result_type __sd = default_seed);
template<typename _Sseq>
typename std::enable_if<std::is_class<_Sseq>::value>::type
seed(_Sseq& __q);
static constexpr result_type
min()
{ return 0; };
static constexpr result_type
max()
{ return std::numeric_limits<result_type>::max(); }
void
discard(unsigned long long __z);
result_type
operator()()
{
if (__builtin_expect(_M_pos >= state_size, 0))
_M_gen_rand();
return _M_stateT[_M_pos++];
}
#ifdef __SSE2__
friend bool
operator==(const simd_fast_mersenne_twister_engine& __lhs,
const simd_fast_mersenne_twister_engine& __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); }
#else
friend bool
operator==(const simd_fast_mersenne_twister_engine& __lhs,
const simd_fast_mersenne_twister_engine& __rhs)
{ return (std::equal(__lhs._M_stateT, __lhs._M_stateT + state_size,
__rhs._M_stateT)
&& __lhs._M_pos == __rhs._M_pos); }
#endif
template<typename _UIntType_2, size_t __m_2,
size_t __pos1_2, size_t __sl1_2, size_t __sl2_2,
size_t __sr1_2, size_t __sr2_2,
uint32_t __msk1_2, uint32_t __msk2_2,
uint32_t __msk3_2, uint32_t __msk4_2,
uint32_t __parity1_2, uint32_t __parity2_2,
uint32_t __parity3_2, uint32_t __parity4_2,
typename _CharT, typename _Traits>
friend std::basic_ostream<_CharT, _Traits>&
operator<<(std::basic_ostream<_CharT, _Traits>& __os,
const __gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType_2,
__m_2, __pos1_2, __sl1_2, __sl2_2, __sr1_2, __sr2_2,
__msk1_2, __msk2_2, __msk3_2, __msk4_2,
__parity1_2, __parity2_2, __parity3_2, __parity4_2>& __x);
template<typename _UIntType_2, size_t __m_2,
size_t __pos1_2, size_t __sl1_2, size_t __sl2_2,
size_t __sr1_2, size_t __sr2_2,
uint32_t __msk1_2, uint32_t __msk2_2,
uint32_t __msk3_2, uint32_t __msk4_2,
uint32_t __parity1_2, uint32_t __parity2_2,
uint32_t __parity3_2, uint32_t __parity4_2,
typename _CharT, typename _Traits>
friend std::basic_istream<_CharT, _Traits>&
operator>>(std::basic_istream<_CharT, _Traits>& __is,
__gnu_cxx::simd_fast_mersenne_twister_engine<_UIntType_2,
__m_2, __pos1_2, __sl1_2, __sl2_2, __sr1_2, __sr2_2,
__msk1_2, __msk2_2, __msk3_2, __msk4_2,
__parity1_2, __parity2_2, __parity3_2, __parity4_2>& __x);
private:
union
{
#ifdef __SSE2__
__m128i _M_state[_M_nstate];
#endif
uint32_t _M_state32[_M_nstate32];
result_type _M_stateT[state_size];
} __attribute__ ((__aligned__ (16)));
size_t _M_pos;
void _M_gen_rand(void);
void _M_period_certification();
};
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>
inline 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)
{ return !(__lhs == __rhs); }
/* Definitions for the SIMD-oriented Fast Mersenne Twister as defined
* in the C implementation by Daito and Matsumoto, as both a 32-bit
* and 64-bit version.
*/
typedef simd_fast_mersenne_twister_engine<uint32_t, 607, 2,
15, 3, 13, 3,
0xfdff37ffU, 0xef7f3f7dU,
0xff777b7dU, 0x7ff7fb2fU,
0x00000001U, 0x00000000U,
0x00000000U, 0x5986f054U>
sfmt607;
typedef simd_fast_mersenne_twister_engine<uint64_t, 607, 2,
15, 3, 13, 3,
0xfdff37ffU, 0xef7f3f7dU,
0xff777b7dU, 0x7ff7fb2fU,
0x00000001U, 0x00000000U,
0x00000000U, 0x5986f054U>
sfmt607_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 1279, 7,
14, 3, 5, 1,
0xf7fefffdU, 0x7fefcfffU,
0xaff3ef3fU, 0xb5ffff7fU,
0x00000001U, 0x00000000U,
0x00000000U, 0x20000000U>
sfmt1279;
typedef simd_fast_mersenne_twister_engine<uint64_t, 1279, 7,
14, 3, 5, 1,
0xf7fefffdU, 0x7fefcfffU,
0xaff3ef3fU, 0xb5ffff7fU,
0x00000001U, 0x00000000U,
0x00000000U, 0x20000000U>
sfmt1279_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 2281, 12,
19, 1, 5, 1,
0xbff7ffbfU, 0xfdfffffeU,
0xf7ffef7fU, 0xf2f7cbbfU,
0x00000001U, 0x00000000U,
0x00000000U, 0x41dfa600U>
sfmt2281;
typedef simd_fast_mersenne_twister_engine<uint64_t, 2281, 12,
19, 1, 5, 1,
0xbff7ffbfU, 0xfdfffffeU,
0xf7ffef7fU, 0xf2f7cbbfU,
0x00000001U, 0x00000000U,
0x00000000U, 0x41dfa600U>
sfmt2281_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 4253, 17,
20, 1, 7, 1,
0x9f7bffffU, 0x9fffff5fU,
0x3efffffbU, 0xfffff7bbU,
0xa8000001U, 0xaf5390a3U,
0xb740b3f8U, 0x6c11486dU>
sfmt4253;
typedef simd_fast_mersenne_twister_engine<uint64_t, 4253, 17,
20, 1, 7, 1,
0x9f7bffffU, 0x9fffff5fU,
0x3efffffbU, 0xfffff7bbU,
0xa8000001U, 0xaf5390a3U,
0xb740b3f8U, 0x6c11486dU>
sfmt4253_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 11213, 68,
14, 3, 7, 3,
0xeffff7fbU, 0xffffffefU,
0xdfdfbfffU, 0x7fffdbfdU,
0x00000001U, 0x00000000U,
0xe8148000U, 0xd0c7afa3U>
sfmt11213;
typedef simd_fast_mersenne_twister_engine<uint64_t, 11213, 68,
14, 3, 7, 3,
0xeffff7fbU, 0xffffffefU,
0xdfdfbfffU, 0x7fffdbfdU,
0x00000001U, 0x00000000U,
0xe8148000U, 0xd0c7afa3U>
sfmt11213_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 19937, 122,
18, 1, 11, 1,
0xdfffffefU, 0xddfecb7fU,
0xbffaffffU, 0xbffffff6U,
0x00000001U, 0x00000000U,
0x00000000U, 0x13c9e684U>
sfmt19937;
typedef simd_fast_mersenne_twister_engine<uint64_t, 19937, 122,
18, 1, 11, 1,
0xdfffffefU, 0xddfecb7fU,
0xbffaffffU, 0xbffffff6U,
0x00000001U, 0x00000000U,
0x00000000U, 0x13c9e684U>
sfmt19937_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 44497, 330,
5, 3, 9, 3,
0xeffffffbU, 0xdfbebfffU,
0xbfbf7befU, 0x9ffd7bffU,
0x00000001U, 0x00000000U,
0xa3ac4000U, 0xecc1327aU>
sfmt44497;
typedef simd_fast_mersenne_twister_engine<uint64_t, 44497, 330,
5, 3, 9, 3,
0xeffffffbU, 0xdfbebfffU,
0xbfbf7befU, 0x9ffd7bffU,
0x00000001U, 0x00000000U,
0xa3ac4000U, 0xecc1327aU>
sfmt44497_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 86243, 366,
6, 7, 19, 1,
0xfdbffbffU, 0xbff7ff3fU,
0xfd77efffU, 0xbf9ff3ffU,
0x00000001U, 0x00000000U,
0x00000000U, 0xe9528d85U>
sfmt86243;
typedef simd_fast_mersenne_twister_engine<uint64_t, 86243, 366,
6, 7, 19, 1,
0xfdbffbffU, 0xbff7ff3fU,
0xfd77efffU, 0xbf9ff3ffU,
0x00000001U, 0x00000000U,
0x00000000U, 0xe9528d85U>
sfmt86243_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 132049, 110,
19, 1, 21, 1,
0xffffbb5fU, 0xfb6ebf95U,
0xfffefffaU, 0xcff77fffU,
0x00000001U, 0x00000000U,
0xcb520000U, 0xc7e91c7dU>
sfmt132049;
typedef simd_fast_mersenne_twister_engine<uint64_t, 132049, 110,
19, 1, 21, 1,
0xffffbb5fU, 0xfb6ebf95U,
0xfffefffaU, 0xcff77fffU,
0x00000001U, 0x00000000U,
0xcb520000U, 0xc7e91c7dU>
sfmt132049_64;
typedef simd_fast_mersenne_twister_engine<uint32_t, 216091, 627,
11, 3, 10, 1,
0xbff7bff7U, 0xbfffffffU,
0xbffffa7fU, 0xffddfbfbU,
0xf8000001U, 0x89e80709U,
0x3bd2b64bU, 0x0c64b1e4U>
sfmt216091;
typedef simd_fast_mersenne_twister_engine<uint64_t, 216091, 627,
11, 3, 10, 1,
0xbff7bff7U, 0xbfffffffU,
0xbffffa7fU, 0xffddfbfbU,
0xf8000001U, 0x89e80709U,
0x3bd2b64bU, 0x0c64b1e4U>
sfmt216091_64;
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#include "random.tcc"
#endif /* _EXT_RANDOM */
|
