Re: [PATCH][ARM] Big Endian and Generic tuning

[Andrew Stubbs <ams at codesourcery dot com>]

On 25/10/11 15:16, Richard Earnshaw wrote:
> The difficulty on R profile is that although BE-32 mode is obsolete,
> there is a config bit that can be set to make the CPU byte-swap the
> instruction stream to make it behave largely like it is running in BE-32
> mode.
>
> I think really we should be pushing the R-profile code towards having
> BE-8 as the default; but to do that we really need a compiler option
> that can override this behaviour (probably -mbe-[8|32]).  Once we have
> that option, we can fix the compiler to prefer BE-8 as there is then a
> way to get back the legacy behaviour.

Here's an updated patch that makes no generalizations.

OK?

Andrew
2011-10-26  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/arm/bpabi.h (BE8_LINK_SPEC): Recognize generic-armv7 tuning.

--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -58,6 +58,7 @@
 #define BE8_LINK_SPEC \
   " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5	\
    |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15	\
+   |mcpu=generic-armv7-a				\
    |march=armv7-m|mcpu=cortex-m3			\
    |march=armv7e-m|mcpu=cortex-m4			\
    |march=armv6-m|mcpu=cortex-m0			\