diff options
Diffstat (limited to 'gcc-4.6/libstdc++-v3/src/hash-long-double-aux.cc')
-rw-r--r-- | gcc-4.6/libstdc++-v3/src/hash-long-double-aux.cc | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/gcc-4.6/libstdc++-v3/src/hash-long-double-aux.cc b/gcc-4.6/libstdc++-v3/src/hash-long-double-aux.cc deleted file mode 100644 index d54d635..0000000 --- a/gcc-4.6/libstdc++-v3/src/hash-long-double-aux.cc +++ /dev/null @@ -1,50 +0,0 @@ -// std::hash and std::tr1::hash definitions, long double bits -*- C++ -*- - -// Copyright (C) 2010 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/>. - - // For long double, careful with random padding bits (e.g., on x86, - // 10 bytes -> 12 bytes) and resort to frexp. - template<> - size_t - hash<long double>::operator()(long double __val) const - { - // 0 and -0 both hash to zero. - if (__val == 0.0L) - return 0; - - int __exponent; - __val = __builtin_frexpl(__val, &__exponent); - __val = __val < 0.0l ? -(__val + 0.5l) : __val; - - const long double __mult = __SIZE_MAX__ + 1.0l; - __val *= __mult; - - // Try to use all the bits of the mantissa (really necessary only - // on 32-bit targets, at least for 80-bit floating point formats). - const size_t __hibits = (size_t)__val; - __val = (__val - (long double)__hibits) * __mult; - - const size_t __coeff = __SIZE_MAX__ / __LDBL_MAX_EXP__; - - return __hibits + (size_t)__val + __coeff * __exponent; - } |