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39 lines
1.3 KiB
39 lines
1.3 KiB
/* contrib/arm-neon/android-ndk.c |
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* |
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* Copyright (c) 2014 Glenn Randers-Pehrson |
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* Written by John Bowler, 2014. |
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* Last changed in libpng 1.6.10 [March 6, 2014] |
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* |
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* This code is released under the libpng license. |
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* For conditions of distribution and use, see the disclaimer |
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* and license in png.h |
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* |
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* SEE contrib/arm-neon/README before reporting bugs |
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* |
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* STATUS: COMPILED, UNTESTED |
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* BUG REPORTS: png-mng-implement@sourceforge.net |
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* |
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* png_have_neon implemented for the Android NDK, see: |
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* |
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* Documentation: |
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* http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html |
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* https://code.google.com/p/android/issues/detail?id=49065 |
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* |
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* NOTE: this requires that libpng is built against the Android NDK and linked |
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* with an implementation of the Android ARM 'cpu-features' library. The code |
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* has been compiled only, not linked: no version of the library has been found, |
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* only the header files exist in the NDK. |
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*/ |
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#include <cpu-features.h> |
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static int |
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png_have_neon(png_structp png_ptr) |
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{ |
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/* This is a whole lot easier than the linux code, however it is probably |
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* implemented as below, therefore it is better to cache the result (these |
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* function calls may be slow!) |
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*/ |
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PNG_UNUSED(png_ptr) |
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return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && |
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(android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; |
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}
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