To Thumb or Not to Thumb
Contents
Project Name
To Thumb? or Not to Thumb?
Project Description
Fedora-ARM does not use thumb. The purpose of this project is to discover whether thumb provides any significant savings in terms of code size, whether programs compiled to thumb execute more quickly or more slowly than non-thumb programs on common ARM processors, whether a thumb compilation takes more or less time than non-thumb, and whether there are any other factors that would influence the decision to support thumb. Ultimately, this project should make a recommendation on the use of the thumb instruction set for the Fedora-ARM secondary architecture.
Project Leader(s)
I will be working alone for this project.
My name is Tae Hee (Tyler) Lee and I'm taking SBR600 course in 2010 Winter Semester.
Blog @ [1] thlee3 @ FAS2 thlee3 @ irc://irc.mozilla.org/seneca Tyler.lee @ Open Source Seneca Wiki thlee3@learn.senecac.on.ca
What I need to learn
Pretty much everything from the scratch. It seems like this project requires lots of background information such as RISC, CISC, Instruction set, Register set, different versions of ARM architecture versions, armv5tel and newer ( and better) models and etc.
Project Plan
Goals for each release:
- 0.1
- 0.2
- 0.3
Test results
From a test performed on 2011-11-12 by CTyler:
........ -O2.. -g... -g stripped nonthumb 48576 98132 37900 thumb... 40563 93107 29932
Project Details
To be added.
Project News
October 8th, 2010 - Project started
October 14th, 2010 - Major project page update with more information.
Resources
ARM Architecture - http://en.wikipedia.org/wiki/ARM_architecture#Thumb
Introduction to ARM thumb - http://www.eetimes.com/discussion/other/4024632/Introduction-to-ARM-thumb
