47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#include <math.h>
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#include "fpmath.h"
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double fabs(double x) {
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#if __arm__
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// Both Clang and GCC insist on moving r0/r1 into a double register
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// and using fabs where bit-twiddling would be a better choice.
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// They get fabsf right, but we need to be careful in fabsl too.
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IEEEd2bits u;
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u.d = x;
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u.bits.sign = 0;
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return u.d;
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#else
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return __builtin_fabs(x);
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#endif
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}
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float fabsf(float x) {
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return __builtin_fabsf(x);
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}
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#if defined(__LP64__)
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long double fabsl(long double x) { return __builtin_fabsl(x); }
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#else
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long double fabsl(long double x) {
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// Don't use __builtin_fabs here because of ARM. (See fabs above.)
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return fabs(x);
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}
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#endif
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