| 1 | /* Copyright (C) 2011-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <math.h> |
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| 19 | #include <math_private.h> |
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| 20 | #include <math-svid-compat.h> |
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| 21 | #include <libm-alias-double.h> |
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| 22 | |
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| 23 | #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \ |
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| 24 | || defined NO_LONG_DOUBLE \ |
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| 25 | || defined LONG_DOUBLE_COMPAT) |
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| 26 | /* wrapper exp */ |
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| 27 | double |
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| 28 | __exp_compat (double x) |
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| 29 | { |
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| 30 | double z = __ieee754_exp (x); |
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| 31 | if (__builtin_expect (!isfinite (z) || z == 0, 0) |
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| 32 | && isfinite (x) && _LIB_VERSION != _IEEE_) |
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| 33 | return __kernel_standard (x, x, 6 + !!signbit (x)); |
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| 34 | |
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| 35 | return z; |
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| 36 | } |
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| 37 | # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) |
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| 38 | compat_symbol (libm, __exp_compat, exp, GLIBC_2_0); |
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| 39 | # endif |
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| 40 | # ifdef NO_LONG_DOUBLE |
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| 41 | weak_alias (__exp_compat, expl) |
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| 42 | # endif |
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| 43 | # ifdef LONG_DOUBLE_COMPAT |
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| 44 | /* Work around gas bug "multiple versions for symbol". */ |
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| 45 | weak_alias (__exp_compat, __exp_compat_alias) |
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| 46 | |
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| 47 | LONG_DOUBLE_COMPAT_CHOOSE_libm_expl ( |
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| 48 | compat_symbol (libm, __exp_compat_alias, expl, FIRST_VERSION_libm_expl), ); |
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| 49 | # endif |
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| 50 | #endif |
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| 51 | |
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