[PATCH, ARM] iWMMXT maintenance

Joseph S. Myers joseph@codesourcery.com
Tue Jun 21 10:47:00 GMT 2011

On Mon, 20 Jun 2011, Xinyu Qi wrote:

> *gcc/config/arm/elf.h: Add option -mwmmxt.
> *gcc/config/arm/arm.opt: Same.

Why?  And where are the documentation updates?  How does this relate to 
the existing iWMMXt options?

I thought the plan (Ramana?) was to move to having a -msimd= option to 
select SIMD units, reflecting that "neon" is not an FPU and "iwmmxt" is 
not an architecture (or a CPU).  So you'd have -march=armv5te 
-msimd=iwmmxt as replacement for the present -march=iwmmxt - or 
-mcpu=<whatever> implying that combination of options.  Given that idea 
I'm not sure adding another legacy option makes sense - at least the 
option should have the desired -msimd=iwmmxt spelling.

Joseph S. Myers

More information about the Gcc-patches mailing list