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Caches and Self-Modifying Code
Jacob Bramley
Ideally caches act as magic make-it-go-faster logic sitting between processor cores and memory banks. But there are cases where cache behaviour must be considered to get the desired result.
September 11, 2013
Coding for Neon - Part 1: Load and Stores
Martyn
This is the first part of a series on how to write SIMD code for Neon using assembly language. It covers getting started with Neon, using it efficiently, and more.
September 11, 2013
Why is Open Source Important?
David Rusling
Sitting in the airport at the end of a week's business trip to the US, I reflected back on the week. It turned out that my colleague on this trip has an even worse sense of direction than myself.…
September 11, 2013
Coding for Neon - Part 2: Dealing With Leftovers
Martyn
In this post, we deal with an often encountered problem: input data that is not a multiple of the length of the vectors you want to process.
September 11, 2013
Condition Codes 1: Condition Flags and Codes
Jacob Bramley
Arm implements conditional execution using a set of flags which store state information about a previous operation. in this post I shed some light on the operation of these flags.
September 11, 2013
How to Load Constants in Assembly for Arm Architecture
Rodolph Perfetta
This post will show you how we can deal with these limitations and how the latest revision of the Arm architecture (Armv7) provides a simple and efficient solution.
September 11, 2013
Coding for Neon - Part 3: Matrix Multiplication
Martyn
In this post, we will look at how to efficiently multiply four-by-four matrices together, an operation frequently used in the world of 3D graphics.
September 11, 2013
Detecting Overflow from MUL
Jacob Bramley
This blog is a tutorial on detecting overflow from MUL.
September 11, 2013
Cortex-A15 to A5: Software compatibility from Superphone to Feature phone
James McNiven
It was always about the code (and where it would be used!) When I was a software developer I would often find that the project team I was in would try to guess how many devices the code would eventually…
September 11, 2013
Condition Codes 3: Conditional Execution in Thumb-2
Jacob Bramley
Armv8 deprecates the use of the it instruction to make anything other than a single 16-bit instruction conditional. This affects many of the examples in this post.
September 11, 2013
Coding for Neon - Part 4: Shifting Left and Right
Martyn
This article introduces the shifting operations provided by Neon, and shows how they can be used to convert image data between commonly used color depths.
September 11, 2013
Valgrind 3.6.0 for ARM-Linux
Guest Partner Blogger
Version 3.6.0 of Valgrind was released a couple of weeks ago. The largest change this release is the addition of support for Linux running on ARM. Learn more about the release in this blog.
September 11, 2013
Memory access ordering - an introduction
Leif Lindholm
In this post, I will be introducing a few concepts and explain the reasons behind them. In future posts, I will follow up with practical examples.
September 11, 2013
Memory access ordering part 2: Barriers and the Linux kernel
Leif Lindholm
My previous post provided an introduction to memory access ordering. It did not however, provide any solution to the problem. This post covers barrier use within the Linux kernel.
September 11, 2013
Mali-T622 - 为中价位主流移动设备带来Full Profile GPU计算
Jakub Lamik
过去两年来,我们在这些博客中介绍了多种应用,其中,MaliTM-T600 系列能通过将应用中的计算密集型部分转移给图形处理器 GPU,其余部分继续在 CPU 上运行,来提高系统性能。在今年的
COMPUTEX
上,我们将发布强大的 ARM®
Cortex®-A12
、
Mali-T622
和
Mali-V500
组合,为中价位智能手机系统级芯片 SoC 提供
ARM 异构计算
的优势…
September 11, 2013
用GPU进行渲染?让Android设备也拥有华丽流畅的用户体验
Jenny Su 苏琴
随着苹果公司的系列产品在市场上的推出,众多电子设备厂商发现,移动设备越变越智能,交互界面越来越人性化。电子设备不光要有硬件,同时需要有强大的软件。这对于移动设备的图形处理能力提出了新的需求。最新的硬件在CPU与GPU的配置上,开始逐步满足移动设备的需求,但是在软件上还没有一个成熟的解决方案。用户对于人性化,图形化,智能化的界面要求尤其强烈。成立于1998年的深圳盖亚信息技术有限公司抓住了这一市场契机…
September 11, 2013
Happy Fifth Birthday iPhone! Innovator and Troublemaker
James Bruce
On June 29, 2007 -- the original iPhone went on sale and unleashed an unrivaled period of creative innovation and destruction in the mobile phone business. In case you have forgotten, the original iPhone…
September 11, 2013
CubeStormer II - The Power of Two
David Gilday
I have a confession to make... I started writing this post in November 2011, but in the excitement of the events at the time, I left it unfinished... until today. This morning I stopped at a local supermarket…
September 11, 2013
Transmogrify the Personal Computer using efficient low power SoC solutions
Andrew N. Sloss
Wouldn't it be great if I could transmogrify the PC to become an intelligent network of specialized components? The goal would be to create a much more efficient computation system marrying critical software…
September 11, 2013
Contact-less payments and NFC
Rob Brown
Since you're reading this blog, it's fairly likely you're technically minded and would've heard of
contact-less payment cards
. These smart-chip enabled cards promise to speed checkout for…
September 11, 2013
The Road from Smartphone to Meta-Self " a Phone That Truly Knows Me
Andrew N. Sloss
I've always wanted a
Smartphone
that can be an abstraction of me. This is driven by my belief that there are people who like writing diaries and those who do not. I've been waiting for a device for…
September 11, 2013
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