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Re: [PATCH] RTEMS: Add LEON3/SPARC multilibs
- From: Eric Botcazou <ebotcazou at adacore dot com>
- To: Sebastian Huber <sebastian dot huber at embedded-brains dot de>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Thu, 19 Sep 2013 09:23:44 +0200
- Subject: Re: [PATCH] RTEMS: Add LEON3/SPARC multilibs
- Authentication-results: sourceware.org; auth=none
- References: <1377774243-32474-1-git-send-email-sebastian dot huber at embedded-brains dot de> <5239E4CB dot 4080406 at gcc dot gnu dot org> <523AA0BB dot 8050007 at embedded-brains dot de>
> I don't expect that this will be back ported to GCC 4.8. You also need
> Binutils 2.24 for this.
>From a SPARC maintainership viewpoint, I'd think that this is backportable for
the upcoming 4.8.2 release, and the patches are essentially SPARC-specific,
but perhaps the RMs are of a different opinion here.
2013-08-09 Eric Botcazou <ebotcazou@adacore.com>
* configure.ac: Add GAS check for LEON instructions on SPARC.
* configure: Regenerate.
* config.in: Likewise.
* config.gcc (with_cpu): Remove sparc-leon*-* and deal with LEON in the
sparc*-*-* block.
* config/sparc/sparc.opt (LEON, LEON3): New masks.
* config/sparc/sparc.h (ASM_CPU32_DEFAULT_SPEC): Set to AS_LEON_FLAG
for LEON or LEON3.
(ASM_CPU_SPEC): Pass AS_LEON_FLAG if -mcpu=leon or -mcpu=leon3.
(AS_LEON_FLAG): New macro.
* config/sparc/sparc.c (sparc_option_override): Set MASK_LEON for leon
and MASK_LEON3 for leon3 and unset them if HAVE_AS_LEON is not defined.
Deal with LEON and LEON3 for the memory model.
* config/sparc/sync.md (atomic_compare_and_swap<mode>): Enable if LEON3
(atomic_compare_and_swap<mode>_1): Likewise.
(*atomic_compare_and_swap<mode>_1): Likewise.
2013-07-23 Eric Botcazou <ebotcazou@adacore.com>
* doc/invoke.texi (SPARC Options): Document new leon3 processor value.
2013-07-22 Eric Botcazou <ebotcazou@adacore.com>
* config.gcc (sparc*-*-*): Accept leon3 processor.
(sparc-leon*-*): Merge with sparc*-*-* and add leon3 support.
* doc/invoke.texi (SPARC Options): Adjust -mfix-ut699 entry.
* config/sparc/sparc-opts.h (enum processor_type): Add PROCESSOR_LEON3.
* config/sparc/sparc.opt (enum processor_type): Add leon3.
(mfix-ut699): Adjust comment.
* config/sparc/sparc.h (TARGET_CPU_leon3): New define.
(CPP_CPU32_DEFAULT_SPEC): Add leon3 support.
(CPP_CPU_SPEC): Likewise.
(ASM_CPU_SPEC): Likewise.
* config/sparc/sparc.c (leon3_cost): New constant.
(sparc_option_override): Add leon3 support.
(mem_ref): New function.
(sparc_gate_work_around_errata): Return true if -mfix-ut699 is enabled.
(sparc_do_work_around_errata): Look into the instruction in the delay
slot and adjust accordingly. Add fix for the data cache nullify issues
of the UT699. Change insertion position for the NOP.
* config/sparc/leon.md (leon_fpalu, leon_fpmds, write_buf): Delete.
(leon3_load): New reservation.
(leon_store): Bump latency to 2.
(grfpu): New automaton.
(grfpu_alu): New unit.
(grfpu_ds): Likewise.
(leon_fp_alu): Adjust.
(leon_fp_mult): Delete.
(leon_fp_div): Split into leon_fp_divs and leon_fp_divd.
(leon_fp_sqrt): Split into leon_fp_sqrts and leon_fp_sqrtd.
* config/sparc/sparc.md (cpu): Add leon3.
* config/sparc/sync.md (atomic_exchangesi): Disable if -mfix-ut699.
(swapsi): Likewise.
(atomic_test_and_set): Likewise.
(ldstub): Likewise.
2013-05-28 Eric Botcazou <ebotcazou@adacore.com>
* doc/invoke.texi (SPARC Options): Document -mfix-ut699.
* builtins.c (expand_builtin_mathfn) <BUILT_IN_SQRT>: Try to widen the
mode if the instruction isn't available in the original mode.
* config/sparc/sparc.opt (mfix-ut699): New option.
* config/sparc/sparc.md (muldf3_extend): Disable if -mfix-ut699.
(divdf3): Turn into expander.
(divdf3_nofix): New insn.
(divdf3_fix): Likewise.
(divsf3): Disable if -mfix-ut699.
(sqrtdf2): Turn into expander.
(sqrtdf2_nofix): New insn.
(sqrtdf2_fix): Likewise.
(sqrtsf2): Disable if -mfix-ut699.
--
Eric Botcazou