1 /* Test exception in current environment. 2 Copyright (C) 1997-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 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. 9 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. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <fenv.h> 20 #include <unistd.h> 21 #include <dl-procinfo.h> 22 #include <ldsodefs.h> 23 24 int fetestexcept(int excepts)25fetestexcept (int excepts) 26 { 27 short temp; 28 int xtemp = 0; 29 30 /* Get current exceptions. */ 31 __asm__ ("fnstsw %0" : "=a" (temp)); 32 33 /* If the CPU supports SSE we test the MXCSR as well. */ 34 if (CPU_FEATURE_USABLE (SSE)) 35 __asm__ ("stmxcsr %0" : "=m" (*&xtemp)); 36 37 return (temp | xtemp) & excepts & FE_ALL_EXCEPT; 38 } 39 libm_hidden_def (fetestexcept) 40