projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ac5ae23 UD |
1 | /* Copyright (C) 2011 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
| f7eac6eb | 4 | |
| 0ac5ae23 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| f7eac6eb | 9 | |
| 0ac5ae23 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| f7eac6eb | 19 | |
| d210ca02 | 20 | #include <fenv.h> |
| 9d13fb24 | 21 | #include <math.h> |
| 9277c064 | 22 | #include <math_private.h> |
| f7eac6eb | 23 | |
| 0ac5ae23 UD |
24 | |
| 25 | static float | |
| 26 | __attribute__ ((noinline)) | |
| 27 | invalid_fn (float x, float fn) | |
| f7eac6eb | 28 | { |
| 0ac5ae23 UD |
29 | if (__rintf (fn) != fn) |
| 30 | { | |
| 31 | feraiseexcept (FE_INVALID); | |
| 32 | return __nan (""); | |
| 33 | } | |
| 34 | else if (fn > 65000.0f) | |
| 35 | return __scalbnf (x, 65000); | |
| 36 | else | |
| 37 | return __scalbnf (x,-65000); | |
| 38 | } | |
| 39 | ||
| 40 | ||
| 41 | float | |
| 42 | __ieee754_scalbf (float x, float fn) | |
| 43 | { | |
| 44 | if (__builtin_expect (__isnanf (x), 0)) | |
| 45 | return x * fn; | |
| 46 | if (__builtin_expect (!__finitef (fn), 0)) | |
| 47 | { | |
| 48 | if (__isnanf (fn) || fn > 0.0f) | |
| 49 | return x * fn; | |
| 50 | if (x == 0.0f) | |
| 51 | return x; | |
| 52 | return x / -fn; | |
| 53 | } | |
| 54 | if (__builtin_expect ((float) (int) fn != fn, 0)) | |
| 55 | return invalid_fn (x, fn); | |
| 56 | ||
| 57 | return __scalbnf (x, (int) fn); | |
| f7eac6eb | 58 | } |
| 0ac5ae23 | 59 | strong_alias (__ieee754_scalbf, __scalbf_finite) |