/* 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: 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

 *    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></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;

}