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armeabi-v7a_hard with NEON模式编译失败 #90

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VivienFu opened this issue Aug 8, 2017 · 3 comments
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armeabi-v7a_hard with NEON模式编译失败 #90

VivienFu opened this issue Aug 8, 2017 · 3 comments

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@VivienFu
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VivienFu commented Aug 8, 2017 •
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-DANDROID_ABI="armeabi-v7a with NEON"这个模式下编译没有问题，可以正常生成并运行。

DANDROID_ABI="armeabi-v7a with NEON"，ndk是不是不支持hard模式armeabi-v7a-hard with NEON呀？我用这个编译，发现想要查找的ndk包含目录中没有armeabi-v7a-hard文件夹，只有armeabi-v7a文件夹 ，所以造成最终报错
@VivienFu VivienFu changed the title ncnn支持模型浮点转定点运算吗 armeabi-v7a_hard with NEON模式编译失败 Aug 10, 2017
@VivienFu
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问题解决了，我用的NDK版本是r15b, 从r14开始，ANDROID_ABI就不支持armeabi-v7a-hard了。
切换成r10e，正常编译生成和执行了。
本来想试试hardfp是不是能快一点儿，不过好像并没有，可能是因为数据是float*类型的？

armeabi-v7a with NEON，lightCNN 200次的平均值147ms
armeabi-v7a-hard with NEON， lightCNN 200次的平均值145ms

@nihui
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nihui commented Aug 12, 2017

最耗时的代码都已经汇编实现了，编译参数的优化很有限

@sunjunlishi
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在哪个地方配置 armeabi-v7a with NEON

@jiefly jiefly mentioned this issue May 13, 2020
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@zhu-zhaofei zhu-zhaofei mentioned this issue Dec 19, 2021
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3 participants
@nihui @sunjunlishi @VivienFu