Re: remove TARGET_E500 and factorize SPE defaults computation in powerpc ports

[David Edelsohn <dje dot gcc at gmail dot com>]

On Tue, May 15, 2012 at 9:47 AM, Olivier Hainque <hainque@adacore.com> wrote:

> ? ? ? ?config/rs6000:
>
> ? ? ? ?* rs6000-opts.h (enum processor_type): Add PROCESSOR_PPC8548.
> ? ? ? ?* rs6000-cpus.def: Reference it for cpu="8548".
> ? ? ? ?* rs6000.md (cpu attribute definition): Add ppc8548.
> ? ? ? ?* 8540.md: indicate that the units/patterns apply to ppc8548 as well.
>
> ? ? ? ?* rs6000.c (rs6000_option_override_internal): Rename default_cpu into
> ? ? ? ?implicit_cpu, conveying what --with-cpu was passed at configure time.
> ? ? ? ?Treat implicit_cpu as have_cpu. Pick defaults for SPE related flags,
> ? ? ? ?check that what is queried is supported by the selected configuration.
> ? ? ? ?Rework the single/double_float and MASK_STRING resets to hit for all
> ? ? ? ?the E500 cores (854x + E500MC variants). Select the ppc8540 costs for
> ? ? ? ?PROCESSOR_PPC8548 as well.
> ? ? ? ?(rs6000_issue_rate): case CPU_PPC8548 together with CPU_PPC8540.
> ? ? ? ?(rs6000_use_sched_lookahead): Likewise, rewriting function as a case
> ? ? ? ?statement instead of a sequence of ifs.
>
> ? ? ? ?* rs6000.h (TARGET_E500): Remove.
> ? ? ? ?(TARGET_NO_LWSYNC): Adjust accordingly.
> ? ? ? ?* e500.h (TARGET_E500): Remove.
> ? ? ? ?(CHECK_E500_OPTIONS): Adjust accordingly.
> ? ? ? ?* eabispe.h (SUBSUBTARGET_OVERRIDE_OPTIONS): Remove.
> ? ? ? ?(TARGET_DEFAULT): Reformat definition to match the one in linuxspe.h.
> ? ? ? ?* linuxspe.h: Likewise.
> ? ? ? ?* vxworks.h: Remove bogus TARGET_E500 overrides and superfluous comments.
> ? ? ? ?* e500-double.h: Remove.
>
> ? ? ? ?gcc:
>
> ? ? ? ?* config.gcc (pick a default with_cpu): For powerpc*-*-*spe*,
> ? ? ? ?default to with_cpu=8548 if --enable-e500-double, and to 8540
> ? ? ? ?otherwise.
> ? ? ? ?(set misc flags section): For powerpc*|rs6000*, remove inclusion
> ? ? ? ?of e500-double.h for --enable-e500-double.

Okay.

Thanks, David