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Re: [PATCH] SPARC: add mcpu=leon3v7 target

[Sorry for the long delay]

> The LEON3/4 soft-core CPU has support for both SPARCv7 and SPARCv8 that
> is configurable at design time. The majority of the LEON3 ASICs are v8
> compatible, however when designing an as small LEON3 as possible, v7
> without FPU is frequently used.
> The current GCC leon3 support implies the SPARCv8 instruction set
> which is not compatible with SPARCv7. Relying on the standard SPARCv7
> (-mcpu=v7) target for a LEON3-V7 is not feasible since the atomic
> instruction (CAS) can not be generated by standard v7 target. This
> is also a problem for binaries aiming to be compatible with all LEON3/4
> processors.
>  * config.gcc (sparc*-*-*): Accept mcpu=leon3v7 processor
>  * doc/invoke.texi (SPARC options): add mcpu=leon3v7 comment
>  * config/sparc/ (leon3_load, leon_store, leon_fp_*):
>    handle leon3v7 as leon3
>  * config/sparc/sparc-opts.h (enum processor_type): Add PROCESSOR_LEON3V7
>  * config/sparc/sparc.c (sparc_option_override): add leon3v7 support
>  * config/sparc/sparc.h (TARGET_CPU_leon3v7): new define
>  * config/sparc/ (cpu): add leon3v7
>  * config/sparc/sparc.opt (enum processor_type): Add leon3v7

OK for all branches (it should apply everywhere I think).

I don't remember if I already asked... does Aeroflex/Gaisler have a copyright 
assignment on file for GCC?  If so, do you also want to have SVN write access?

Eric Botcazou

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