1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <math.h>
18
19 #include "fpmath.h"
20
fabs(double x)21 double fabs(double x) {
22 #if __arm__
23 // Both Clang and GCC insist on moving r0/r1 into a double register
24 // and using fabs where bit-twiddling would be a better choice.
25 // They get fabsf right, but we need to be careful in fabsl too.
26 IEEEd2bits u;
27 u.d = x;
28 u.bits.sign = 0;
29 return u.d;
30 #else
31 return __builtin_fabs(x);
32 #endif
33 }
34
fabsf(float x)35 float fabsf(float x) {
36 return __builtin_fabsf(x);
37 }
38
39 #if defined(__LP64__)
fabsl(long double x)40 long double fabsl(long double x) { return __builtin_fabsl(x); }
41 #else
fabsl(long double x)42 long double fabsl(long double x) {
43 // Don't use __builtin_fabs here because of ARM. (See fabs above.)
44 return fabs(x);
45 }
46 #endif
47