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- /* contrib/arm-neon/android-ndk.c
- *
- * Copyright (c) 2014 Glenn Randers-Pehrson
- * Written by John Bowler, 2014.
- * Last changed in libpng 1.6.10 [March 6, 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: [email protected]
- *
- * png_have_neon implemented for the Android NDK, see:
- *
- * Documentation:
- * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
- * http://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;
- }
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