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ARM iwmmxt CFLAGS
- From: Matt Turner <mattst88 at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Thu, 14 Jul 2011 13:39:02 -0400
- Subject: ARM iwmmxt CFLAGS
Hi,
I'm a bit confused about how CFLAGS related to ARM's iwmmxt
instruction set extensions are handled.
On x86 to enable SSEx instructions, one would do something like
-march=... -msse3, but on ARM I must do something like -march=iwmmxt
(where I'd have expected -march=armv7 -miwmmxt).
What flags would I use to optimize code for armv7 while enabling
iwmmxt instructions? -march=armv7 -mcpu=iwmmxt?
Also, do I need to do anything with -mabi=iwmmxt? I think not, but..
Thanks,
Matt
http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html