SuperH: -m4-nofpu flag

[Alexandre Oliva]

On Feb 15, 2001, NIIBE Yutaka <gniibe@m17n.org> wrote:

> If we use sh-elf specs, this should be:
> ------------------
> #if defined(__SH4__) || defined(__SH4_NOFPU__)
      || defined(__SH4_SINGLE_ONLY__) || defined(__SH4_SINGLE__)

It's a pity there's no macro defined for all SH4 variants.  How about
defining __sh4__ on them all?  Then __sh4__ would denote ``This is a
SH4 machine'', defined for all of -m4, -m4-single, -m4-single-only and
-m4-nofpu, whereas __SH4__ would denote ``This is a SH4 machine with
an single- and double-precision FPU, with double-precision assumed
enabled at function entry and exit''.  Then, we wouldn't be changing
the meaning of any existing preprocessor macros (I'd rather not do it;
there may be people out there depending on it), yet it would be easy
to tell whether the target machine is a SuperH 4 or some earlier
machine.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
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