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55 lines
1.5 KiB
55 lines
1.5 KiB
9 years ago
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/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include "Excepts.h"
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#if defined(__APPLE__) || defined(__OSX__)
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#include <fenv.h>
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int fegetexcept(void) {
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static fenv_t fenv;
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return fegetenv(&fenv) ? -1 : (fenv.__control & FE_ALL_EXCEPT);
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}
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int feenableexcept(unsigned int excepts) {
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static fenv_t fenv;
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unsigned int new_excepts = excepts & FE_ALL_EXCEPT, old_excepts;
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if ( fegetenv (&fenv) ) return -1;
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old_excepts = fenv.__control & FE_ALL_EXCEPT;
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// unmask
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fenv.__control &= ~new_excepts;
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fenv.__mxcsr &= ~(new_excepts << 7);
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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int fedisableexcept(unsigned int excepts) {
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static fenv_t fenv;
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unsigned int new_excepts = excepts & FE_ALL_EXCEPT, old_excepts;
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if ( fegetenv (&fenv) ) return -1;
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old_excepts = fenv.__control & FE_ALL_EXCEPT;
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// mask
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fenv.__control |= new_excepts;
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fenv.__mxcsr |= new_excepts << 7;
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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#endif
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