projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2011-2019 Free Software Foundation, Inc. |
| 0ac5ae23 UD |
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. | |
| f7eac6eb | 14 | |
| 0ac5ae23 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| f7eac6eb | 18 | |
| 9d13fb24 | 19 | #include <math.h> |
| 9277c064 | 20 | #include <math_private.h> |
| 813378e9 | 21 | #include <math-svid-compat.h> |
| 9ac44708 | 22 | #include <libm-alias-double.h> |
| f7eac6eb RM |
23 | |
| 24 | ||
| a502c529 SN |
25 | #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \ |
| 26 | || defined NO_LONG_DOUBLE \ | |
| 27 | || defined LONG_DOUBLE_COMPAT) | |
| 0ac5ae23 UD |
28 | /* wrapper pow */ |
| 29 | double | |
| a502c529 | 30 | __pow_compat (double x, double y) |
| f7eac6eb | 31 | { |
| 0ac5ae23 | 32 | double z = __ieee754_pow (x, y); |
| d81f90cc | 33 | if (__glibc_unlikely (!isfinite (z))) |
| 0ac5ae23 UD |
34 | { |
| 35 | if (_LIB_VERSION != _IEEE_) | |
| 36 | { | |
| 72d839a4 | 37 | if (isfinite (x) && isfinite (y)) |
| 0ac5ae23 | 38 | { |
| d81f90cc | 39 | if (isnan (z)) |
| 0ac5ae23 UD |
40 | /* pow neg**non-int */ |
| 41 | return __kernel_standard (x, y, 24); | |
| 42 | else if (x == 0.0 && y < 0.0) | |
| 43 | { | |
| 44 | if (signbit (x) && signbit (z)) | |
| 45 | /* pow(-0.0,negative) */ | |
| 46 | return __kernel_standard (x, y, 23); | |
| 47 | else | |
| 48 | /* pow(+0.0,negative) */ | |
| 49 | return __kernel_standard (x, y, 43); | |
| 50 | } | |
| 0d8733c4 | 51 | else |
| 0ac5ae23 UD |
52 | /* pow overflow */ |
| 53 | return __kernel_standard (x, y, 21); | |
| 7ef90c15 | 54 | } |
| f7eac6eb | 55 | } |
| 0ac5ae23 | 56 | } |
| 72d839a4 JM |
57 | else if (__builtin_expect (z == 0.0, 0) |
| 58 | && isfinite (x) && x != 0 && isfinite (y) | |
| 0ac5ae23 | 59 | && _LIB_VERSION != _IEEE_) |
| 72d839a4 JM |
60 | /* pow underflow */ |
| 61 | return __kernel_standard (x, y, 22); | |
| 0ac5ae23 UD |
62 | |
| 63 | return z; | |
| f7eac6eb | 64 | } |
| a502c529 SN |
65 | # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) |
| 66 | compat_symbol (libm, __pow_compat, pow, GLIBC_2_0); | |
| 67 | # endif | |
| 68 | # ifdef NO_LONG_DOUBLE | |
| 69 | weak_alias (__pow_compat, powl) | |
| 70 | # endif | |
| 71 | # ifdef LONG_DOUBLE_COMPAT | |
| 72 | /* Work around gas bug "multiple versions for symbol". */ | |
| 73 | weak_alias (__pow_compat, __pow_compat_alias) | |
| 74 | ||
| 75 | LONG_DOUBLE_COMPAT_CHOOSE_libm_powl ( | |
| 76 | compat_symbol (libm, __pow_compat_alias, powl, FIRST_VERSION_libm_powl), ); | |
| 77 | # endif | |
| cccda09f | 78 | #endif |