[U-Boot] [RFC][PATCH] ARMV7: Patch to fix hard float build issues

Wolfgang Denk wd at denx.de
Sat Feb 19 20:26:52 CET 2011


Dear =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?=,

In message <yw1x7hcw5f6w.fsf at unicorn.mansr.com> you wrote:
> 
> > So whats the reasoning to use -msoft-float as it is currently done? To
> > confuse people? ;)
> 
> I guess it's there to make sure no floating-point instructions make it
> into u-boot, even though floats are not used in the code.  Perhaps
> someone was paranoid.

No.  There are pretty good reasons to use -msoft-float.  On some
systems certain versions of GCC will optimize certain operations
(usually corresponding to 8 byte memory copy things) by using FP
registers.

-msoft-float prevents that.

Best regards,

Wolfgang Denk

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