1 //===-- Implementation of fesetexceptflag function ------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/fenv/fesetexceptflag.h" 10 #include "hdr/types/fexcept_t.h" 11 #include "src/__support/FPUtil/FEnvImpl.h" 12 #include "src/__support/common.h" 13 #include "src/__support/macros/config.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 LLVM_LIBC_FUNCTION(int, fesetexceptflag, 18 (const fexcept_t *flagp, int excepts)) { 19 // Since the return type of fetestexcept is int, we ensure that fexcept_t 20 // can fit in int type. 21 static_assert(sizeof(int) >= sizeof(fexcept_t), 22 "fexcept_t value cannot fit in an int value."); 23 int excepts_to_set = static_cast<int>(*flagp) & excepts; 24 fputil::clear_except(FE_ALL_EXCEPT); 25 return fputil::set_except(excepts_to_set); 26 } 27 28 } // namespace LIBC_NAMESPACE_DECL 29