projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2b778ceb | 1 | /* Copyright (C) 2011-2021 Free Software Foundation, Inc. |
| 0ac5ae23 | 2 | This file is part of the GNU C Library. |
| f7eac6eb | 3 | |
| 0ac5ae23 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| f7eac6eb | 8 | |
| 0ac5ae23 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| f7eac6eb | 13 | |
| 0ac5ae23 | 14 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 15 | License along with the GNU C Library; if not, see |
| 5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
| f7eac6eb | 17 | |
| 9d13fb24 | 18 | #include <math.h> |
| 9277c064 | 19 | #include <math_private.h> |
| 813378e9 | 20 | #include <math-svid-compat.h> |
| 9ac44708 | 21 | #include <libm-alias-double.h> |
| f7eac6eb RM |
22 | |
| 23 | ||
| a502c529 SN |
24 | #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \ |
| 25 | || defined NO_LONG_DOUBLE \ | |
| 26 | || defined LONG_DOUBLE_COMPAT) | |
| 0ac5ae23 UD |
27 | /* wrapper pow */ |
| 28 | double | |
| a502c529 | 29 | __pow_compat (double x, double y) |
| f7eac6eb | 30 | { |
| 0ac5ae23 | 31 | double z = __ieee754_pow (x, y); |
| d81f90cc | 32 | if (__glibc_unlikely (!isfinite (z))) |
| 0ac5ae23 UD |
33 | { |
| 34 | if (_LIB_VERSION != _IEEE_) | |
| 35 | { | |
| 72d839a4 | 36 | if (isfinite (x) && isfinite (y)) |
| 0ac5ae23 | 37 | { |
| d81f90cc | 38 | if (isnan (z)) |
| 0ac5ae23 UD |
39 | /* pow neg**non-int */ |
| 40 | return __kernel_standard (x, y, 24); | |
| 41 | else if (x == 0.0 && y < 0.0) | |
| 42 | { | |
| 43 | if (signbit (x) && signbit (z)) | |
| 44 | /* pow(-0.0,negative) */ | |
| 45 | return __kernel_standard (x, y, 23); | |
| 46 | else | |
| 47 | /* pow(+0.0,negative) */ | |
| 48 | return __kernel_standard (x, y, 43); | |
| 49 | } | |
| 0d8733c4 | 50 | else |
| 0ac5ae23 UD |
51 | /* pow overflow */ |
| 52 | return __kernel_standard (x, y, 21); | |
| 7ef90c15 | 53 | } |
| f7eac6eb | 54 | } |
| 0ac5ae23 | 55 | } |
| 72d839a4 JM |
56 | else if (__builtin_expect (z == 0.0, 0) |
| 57 | && isfinite (x) && x != 0 && isfinite (y) | |
| 0ac5ae23 | 58 | && _LIB_VERSION != _IEEE_) |
| 72d839a4 JM |
59 | /* pow underflow */ |
| 60 | return __kernel_standard (x, y, 22); | |
| 0ac5ae23 UD |
61 | |
| 62 | return z; | |
| f7eac6eb | 63 | } |
| a502c529 SN |
64 | # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) |
| 65 | compat_symbol (libm, __pow_compat, pow, GLIBC_2_0); | |
| 66 | # endif | |
| 67 | # ifdef NO_LONG_DOUBLE | |
| 68 | weak_alias (__pow_compat, powl) | |
| 69 | # endif | |
| 70 | # ifdef LONG_DOUBLE_COMPAT | |
| 71 | /* Work around gas bug "multiple versions for symbol". */ | |
| 72 | weak_alias (__pow_compat, __pow_compat_alias) | |
| 73 | ||
| 74 | LONG_DOUBLE_COMPAT_CHOOSE_libm_powl ( | |
| 75 | compat_symbol (libm, __pow_compat_alias, powl, FIRST_VERSION_libm_powl), ); | |
| 76 | # endif | |
| cccda09f | 77 | #endif |