32bitmicro

1. How to Load Constants in Assembly for ARM Architecture

How to Load Constants in Assembly for ARM Architecture Blog entry, ARM, Assembly "ARM is a 32-bit CPU architecture where every instruction is 32 bits long. Any constants which are part of an instruction must be encoded within the 32 bits of the...

Wednesday, 21 July 2010 | 151 hits | Print |  E-mail | Report | Read more

2. Detecting Overflow from MUL

Detecting Overflow from MUL Blog, ARM, Assembly "Setting the Flags with mul Those familiar with ARM's mul instruction may realize that although it can take the s suffix to update the flags, it only updates the n and z flags. Consider the...

Monday, 30 August 2010 | 144 hits | Print |  E-mail | Report | Read more

3. ARM Condition Codes

ARM Condition Codes Assembler,ARM,Blog entry Condition Codes 1: Condition Flags and Codes - web page link "Every practical general-purpose computing architecture has a mechanism of conditionally executing some code. Such mechanisms are used to...

Tuesday, 05 October 2010 | 484 hits | Print |  E-mail | Report | Read more

4. Branch and Call Sequences Explained

Branch and Call Sequences Explained "In this post, I will explain the various branch and call instructions available in the ARM and Thumb instruction sets, and why the variants exist. Finally, I will provide a JavaScript tool that can help you...

Friday, 06 January 2012 | 55 hits | Print |  E-mail | Report | Read more

5. In what situations might I need to insert memory barrier instructions?

In what situations might I need to insert memory barrier instructions? ARMv7 Architecture FAQ "In some circumstances, processor optimizations such as speculative reads or out-of-order execution (as in the example above), are undesirable and can...

Saturday, 11 February 2012 | 46 hits | Print |  E-mail | Report | Read more