/* Raise given exceptions. Copyright (C) 1997-2020 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Nobuhiro Iwamatsu , 2012. 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 . */ #include #include #include #include int __feraiseexcept (int excepts) { if (excepts == 0) return 0; /* Raise exceptions represented by EXPECTS. */ if (excepts & FE_INEXACT) { double d = 1.0, x = 3.0; __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); } if (excepts & FE_UNDERFLOW) { long double d = LDBL_MIN, x = 10; __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); } if (excepts & FE_OVERFLOW) { long double d = LDBL_MAX; __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d)); } if (excepts & FE_DIVBYZERO) { double d = 1.0, x = 0.0; __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); } if (excepts & FE_INVALID) { double d = HUGE_VAL, x = 0.0; __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x)); } { /* Restore flag fields. */ fpu_control_t cw; _FPU_GETCW (cw); cw |= (excepts & FE_ALL_EXCEPT); _FPU_SETCW (cw); } return 0; } libm_hidden_def (__feraiseexcept) weak_alias (__feraiseexcept, feraiseexcept) libm_hidden_weak (feraiseexcept)