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  • Endianness vtbx

    Hi @ all,

    I have a 16 byte permutation mask uint8_t[16] and a 16 byte data array uint32_t[4]. I want to "shuffle" this data array using vtbx.

    This is my code so far:

    #include <arm_neon.h>
    #include <iostream>
    
    int main() {
        uint32_t* data32…

  • Loads and Stores for unaligned memory addresses

    Hi,

    I am trying to write a code using Neon instructions for an iOS app, based on a previous code that has been optimized with SSE instructions for a desktop app.

    The SSE code has memory alignment checks throughout the code, based on which it invokes the…

  • Adding new working points - additional frequency values in linux

    Deciding what frequency within the CPUfreq policy should be used is achieved using "cpufreq governors".

    Inside the CPUFreq we can find:

    # ls /sys/devices/system/cpu/cpu1/cpufreq/
    affected_cpus
    related_cpus
    scaling_max_freq
    bios_limit
    scaling_available_frequencies…

  • ARM_V8 which  instructions are not support in android platform compare to ios(xcode)

    Hi,actually my code is working properly on ios (xcode) but if i run the same code on android platform which is not working i don't know how to debug on android.so please could you suggest me that which are the instructions not supports in android platform…

  • 3x3 convolution optimized speed using (NEON SIMD) or (NEON SIMD and OpenMP) on S7/Note7

    We want to implement 3x3 convolution of image whose size is 4032x3024 on S7/Note7 to have Chipset such as Exynos 8890(S7 S.LSI) or Qualcomm MSM8996 Snapdragon 820.
    To implement this, we used the Anroid NDK, Neon SIMD and OpenMP.
    For 1 image (4032x3024…

  • Offline asm dump

    Is there any way to get an offline asm dump for OpenCL kernels? 

    We have a convolution shader generator that we use to generate for everything from iOS Metal to Android OpenCL.

    The kernels work with reasonable perf on NVidia, AMD, Intel, Apple and Adreno…

  • Programming FPU for Secure and Non Secure Use

    I was getting a NOCP Usage Fault when my non-secure thread entered WIC sleep and a Secure Handler woke up the processor from WIC sleep.

    I wasn't using any FPU code and I could not understand why the M33 was throwing a NOCP Usage Fault.

    Luckily, I…

  • Interrupts from the secure world to the non-secure world.

    Hello experts,

    I am using SAM L11 (Core is Cortex-M23).
    I did a simple test of the interrupt.
    In the case of the handler was the secure world, it worked as I expected.
    The instruction sequences are as the follows.
     *(int*)(0xE000E380) = 0;
     *(int*)(0xE000E100…

  • MPS2+ Expansion ports possible frequency and usage

    We started working on a daughter card we want to connect via the expansion ports, and we trying to understand the 52 IOs of the two expansion ports frequency capabilities (Board aspect) , is there any information regarding it ?

    Are there any schematics…

  • MPS2+ Firmware for Mbed

    This is an update to the fimware for the MCC on the MPS2+ board. This adds some features for improved compatibility with the Mbed OS software examples and continuous integration flow. You do not need to install the update unless you are working with Mbed…

  • IOS Development Shaking Gesture

    Hi all,

    In Swift IOS app Development I need help with the code for:

    When I get the app going I need the function for resetting the app back to the start once I shake the device on the last view controller. It's a simple magic 8 app that I have the code…

  • "8th" - grokking the REPL

    Introduction

    This post is intended to give you a feel for using 8th, but it is not a tutorial per se. If you're not familiar with "8th", please view my previous blog post.

    Resources:

  • Arm Compute Library (ACL) on iOS

    我在官方文档上只看到 linux & android 的安装教程,有没有可能在 iOS 上编译通过呢?

    如果 ACL 不能在 iOS 上运行,那会是因为什么原因?

  • Compile NE10 to use in iOS

    Hello. There.

    I was trying to find FFT solution with best performance in mobile environment (Android, iOS).

    And, I am recently very excited to find NE10.

    But there is some obstacle in compiling NE10 Library.

    I tried to build library for iOS in my Mac -XCode…

  • 什么阻碍了 Android 游戏性能?

    原文地址:What's holding back Android gaming performance?

    原作者:sharifsakr

    由于需要支持的设备众多,Android 软件的性能频繁下降。这是因为开发人员无法像在 iOS 上一样,轻松快速地微调应用和游戏性能,而消费者在 iOS 上选择硬件的权利少得可怜。事实上,让 Android 游戏在常见设备上顺畅运行已经颇费心,更别提优化其帧率、RAM 要求、耗电量或其他使用方面了。

     

    没有比这些发现更令人感到惊讶的了,这都要多谢 Google…

  • What's holding back Android gaming performance?

    Android software frequently sags under the sheer weight of all the different devices it’s required to support. This is because developers can’t fine-tune the performance of their apps and games with the same ease and speed that they can on iOS, where…

  • [转帖]可穿戴都忘了吧 “狗穿戴”才是心头肉好么?

    看到一篇有意思的可穿戴设备文章,分享给大家:

    原帖地址: http://ee.ofweek.com/2013-12/ART-8440-2817-28756206.html

    andychen leozou lifenggeng

    导读: 可穿戴设备红极一时,各种智能表、环、眼镜悉数登场,杀红了眼。换个思路,专做宠物的可穿戴设备,说不定大有可为:宠物地位高、数量多,监控宠物位置、健康的刚需巨大;对宠物来说,可穿戴设备无可替代性,它们不会用手机。

    可穿戴设备红极一时,各种智能腕表、手环、眼镜悉数登场,殊不知目前市场中打着…