| /* contrib/arm-neon/android-ndk.c |
| * |
| * Copyright (c) 2014 Glenn Randers-Pehrson |
| * Written by John Bowler, 2014. |
| * |
| * This code is released under the libpng license. |
| * For conditions of distribution and use, see the disclaimer |
| * and license in png.h |
| * |
| * SEE contrib/arm-neon/README before reporting bugs |
| * |
| * STATUS: COMPILED, UNTESTED |
| * BUG REPORTS: png-mng-implement@sourceforge.net |
| * |
| * png_have_neon implemented for the Android NDK, see: |
| * |
| * Documentation: |
| * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html |
| * https://code.google.com/p/android/issues/detail?id=49065 |
| * |
| * NOTE: this requires that libpng is built against the Android NDK and linked |
| * with an implementation of the Android ARM 'cpu-features' library. The code |
| * has been compiled only, not linked: no version of the library has been found, |
| * only the header files exist in the NDK. |
| */ |
| |
| #include <cpu-features.h> |
| |
| static int |
| png_have_neon(png_structp png_ptr) |
| { |
| /* This is a whole lot easier than the linux code, however it is probably |
| * implemented as below, therefore it is better to cache the result (these |
| * function calls may be slow!) |
| */ |
| PNG_UNUSED(png_ptr) |
| return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && |
| (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; |
| } |
