diff options
author | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:36:36 +0200 |
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committer | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:42:26 +0200 |
commit | a89a14ef5da44684a16b204e7a70460cc8c4922a (patch) | |
tree | b23b4c6b155977909ef508fdae2f48d33d802813 /vendor/gmp-6.3.0/mpf/set_d.c | |
parent | 1db63fcedab0b288820d66e100b1877b1a5a8851 (diff) |
Basic constant folding implementation
Diffstat (limited to 'vendor/gmp-6.3.0/mpf/set_d.c')
-rw-r--r-- | vendor/gmp-6.3.0/mpf/set_d.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/mpf/set_d.c b/vendor/gmp-6.3.0/mpf/set_d.c new file mode 100644 index 0000000..0442f2f --- /dev/null +++ b/vendor/gmp-6.3.0/mpf/set_d.c @@ -0,0 +1,59 @@ +/* mpf_set_d -- Assign a float from a double. + +Copyright 1993-1996, 2001, 2003, 2004 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +The GNU MP 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. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "config.h" + +#if HAVE_FLOAT_H +#include <float.h> /* for DBL_MAX */ +#endif + +#include "gmp-impl.h" + +void +mpf_set_d (mpf_ptr r, double d) +{ + int negative; + + DOUBLE_NAN_INF_ACTION (d, + __gmp_invalid_operation (), + __gmp_invalid_operation ()); + + if (UNLIKELY (d == 0)) + { + SIZ(r) = 0; + EXP(r) = 0; + return; + } + negative = d < 0; + d = ABS (d); + + SIZ(r) = negative ? -LIMBS_PER_DOUBLE : LIMBS_PER_DOUBLE; + EXP(r) = __gmp_extract_double (PTR(r), d); +} |