1 /* contrib/arm-neon/android-ndk.c
3 * Copyright (c) 2014 Glenn Randers-Pehrson
4 * Written by John Bowler, 2014.
6 * This code is released under the libpng license.
7 * For conditions of distribution and use, see the disclaimer
10 * SEE contrib/arm-neon/README before reporting bugs
12 * STATUS: COMPILED, UNTESTED
13 * BUG REPORTS: png-mng-implement@sourceforge.net
15 * png_have_neon implemented for the Android NDK, see:
18 * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
19 * https://code.google.com/p/android/issues/detail?id=49065
21 * NOTE: this requires that libpng is built against the Android NDK and linked
22 * with an implementation of the Android ARM 'cpu-features' library. The code
23 * has been compiled only, not linked: no version of the library has been found,
24 * only the header files exist in the NDK.
27 #include <cpu-features.h>
30 png_have_neon(png_structp png_ptr)
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!)
37 return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM &&
38 (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;