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| 1 /* mpf_abs -- Compute the absolute value of a float. | |
| 2 | |
| 3 Copyright 1993, 1994, 1995, 2001 Free Software Foundation, Inc. | |
| 4 | |
| 5 This file is part of the GNU MP Library. | |
| 6 | |
| 7 The GNU MP Library is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU Lesser General Public License as published by | |
| 9 the Free Software Foundation; either version 3 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 The GNU MP Library is distributed in the hope that it will be useful, but | |
| 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
| 15 License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU Lesser General Public License | |
| 18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ | |
| 19 | |
| 20 #include "gmp.h" | |
| 21 #include "gmp-impl.h" | |
| 22 | |
| 23 void | |
| 24 mpf_abs (mpf_ptr r, mpf_srcptr u) | |
| 25 { | |
| 26 mp_size_t size; | |
| 27 | |
| 28 size = ABS (u->_mp_size); | |
| 29 if (r != u) | |
| 30 { | |
| 31 mp_size_t prec; | |
| 32 mp_ptr rp, up; | |
| 33 | |
| 34 prec = r->_mp_prec + 1; /* lie not to lose precision in assignment */ | |
| 35 rp = r->_mp_d; | |
| 36 up = u->_mp_d; | |
| 37 | |
| 38 if (size > prec) | |
| 39 { | |
| 40 up += size - prec; | |
| 41 size = prec; | |
| 42 } | |
| 43 | |
| 44 MPN_COPY (rp, up, size); | |
| 45 r->_mp_exp = u->_mp_exp; | |
| 46 } | |
| 47 r->_mp_size = size; | |
| 48 } | |
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