| 1 | /* |
| 2 | * Copyright (C) 2013 Jolla Ltd. |
| 3 | * Contact: Thomas Perl <thomas.perl@jollamobile.com> |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #ifndef HYBRIS_FLOATING_POINT_ABI_H_ |
| 19 | #define HYBRIS_FLOATING_POINT_ABI_H_ |
| 20 | |
| 21 | /** |
| 22 | * Make sure to use FP_ATTRIB on all functions that are loaded from |
| 23 | * Android (bionic libc) libraries to make sure floating point arguments |
| 24 | * are passed the right way. |
| 25 | * |
| 26 | * See: http://wiki.debian.org/ArmHardFloatPort/VfpComparison |
| 27 | * http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html |
| 28 | * |
| 29 | * It doesn't hurt to have it added for non-floating point arguments and |
| 30 | * return types, even though it does not really have any effect. |
| 31 | * |
| 32 | * If you use the convenience macros in hybris/internal/binding.h, your |
| 33 | * wrapper functions will automatically make use of this attribute. |
| 34 | **/ |
| 35 | |
| 36 | #ifdef __ARM_PCS_VFP |
| 37 | # define FP_ATTRIB __attribute__((pcs("aapcs"))) |
| 38 | #else |
| 39 | # define FP_ATTRIB |
| 40 | #endif |
| 41 | |
| 42 | #endif /* HYBRIS_FLOATING_POINT_ABI_H_ */ |