| /* Software floating-point emulation. |
| Return !a |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Richard Henderson (rth@cygnus.com) and |
| Jakub Jelinek (jj@ultra.linux.cz). |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "soft-fp.h" |
| #include "quad.h" |
| |
| long double _Q_neg(const long double a) |
| { |
| union { |
| long double ldbl; |
| UWtype words[4]; |
| } c; |
| |
| c.ldbl = a; |
| |
| #if (__BYTE_ORDER == __BIG_ENDIAN) |
| c.words[0] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
| #elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 64) |
| c.words[1] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
| #elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 32) |
| c.words[3] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
| #else |
| FP_DECL_Q(A); FP_DECL_Q(C); |
| |
| FP_UNPACK_RAW_Q(A, a); |
| FP_NEG_Q(C, A); |
| FP_PACK_RAW_Q(c.ldbl, C); |
| #endif |
| return c.ldbl; |
| } |
