/* Copyright (C) 2011-2019 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include <math.h> #include <math_private.h> #include <math-svid-compat.h> #include <libm-alias-float.h> #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27) /* wrapper powf */ float __powf_compat (float x, float y) { float z = __ieee754_powf (x, y); if (__glibc_unlikely (!isfinite (z))) { if (_LIB_VERSION != _IEEE_) { if (isfinite (x) && isfinite (y)) { if (isnan (z)) /* pow neg**non-int */ return __kernel_standard_f (x, y, 124); else if (x == 0.0f && y < 0.0f) { if (signbit (x) && signbit (z)) /* pow(-0.0,negative) */ return __kernel_standard_f (x, y, 123); else /* pow(+0.0,negative) */ return __kernel_standard_f (x, y, 143); } else /* pow overflow */ return __kernel_standard_f (x, y, 121); } } } else if (__builtin_expect (z == 0.0f, 0) && isfinite (x) && x != 0 && isfinite (y) && _LIB_VERSION != _IEEE_) /* pow underflow */ return __kernel_standard_f (x, y, 122); return z; } compat_symbol (libm, __powf_compat, powf, GLIBC_2_0); #endif