| Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1 | /* contrib/arm-neon/android-ndk.c |
| 2 | * |
| 3 | * Copyright (c) 2014 Glenn Randers-Pehrson |
| 4 | * Written by John Bowler, 2014. |
| 5 | * Last changed in libpng 1.6.10 [March 6, 2014] |
| 6 | * |
| 7 | * This code is released under the libpng license. |
| 8 | * For conditions of distribution and use, see the disclaimer |
| 9 | * and license in png.h |
| 10 | * |
| 11 | * SEE contrib/arm-neon/README before reporting bugs |
| 12 | * |
| 13 | * STATUS: COMPILED, UNTESTED |
| 14 | * BUG REPORTS: png-mng-implement@sourceforge.net |
| 15 | * |
| 16 | * png_have_neon implemented for the Android NDK, see: |
| 17 | * |
| 18 | * Documentation: |
| 19 | * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html |
| Leon Scroggins III | 3cc83ac | 2017-10-06 11:02:56 -0400 | [diff] [blame] | 20 | * https://code.google.com/p/android/issues/detail?id=49065 |
| Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 21 | * |
| 22 | * NOTE: this requires that libpng is built against the Android NDK and linked |
| 23 | * with an implementation of the Android ARM 'cpu-features' library. The code |
| 24 | * has been compiled only, not linked: no version of the library has been found, |
| 25 | * only the header files exist in the NDK. |
| 26 | */ |
| 27 | #include <cpu-features.h> |
| 28 | |
| 29 | static int |
| 30 | png_have_neon(png_structp png_ptr) |
| 31 | { |
| 32 | /* This is a whole lot easier than the linux code, however it is probably |
| 33 | * implemented as below, therefore it is better to cache the result (these |
| 34 | * function calls may be slow!) |
| 35 | */ |
| 36 | PNG_UNUSED(png_ptr) |
| 37 | return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && |
| 38 | (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; |
| 39 | } |