On Thu, Oct 13, 2022 at 5:33 PM Joshi, Tejas Sanjay
<tejassanjay.jo...@amd.com> wrote:
>
> [Public]
>
> Hi all,
>
> PFA, the patch that enables support for the next generation AMD Zen4 CPU via
> -march=znver4.
> This is a basic enablement patch and as of now the costings, tunings are kept
> same as znver3.
>
> Good for trunk?
2022-09-28 Tejas Joshi <tejassanjay.jo...@amd.com>
gcc/ChangeLog:
* common/config/i386/cpuinfo.h (get_amd_cpu): Recognize znver4.
* common/config/i386/i386-common.cc (processor_names): Add znver4.
(processor_alias_table): Add znver4 and modularize old znvers.
* common/config/i386/i386-cpuinfo.h (processor_subtypes):
AMDFAM19H_ZNVER4.
* config.gcc (x86_64-*-* |...): Likewise.
* config/i386/driver-i386.cc (host_detect_local_cpu): Let
-march=native recognize znver4 cpus.
* config/i386/i386-c.cc (ix86_target_macros_internal): Add znver4.
* config/i386/i386-options.cc (m_ZNVER4): New definition.
(m_ZNVER): Include m_ZNVER4.
(processor_cost_table): Add znver4.
* config/i386/i386.cc (ix86_reassociation_width): Likewise.
* gcc/config/i386/i386.h (processor_type): Add PROCESSOR_ZNVER4.
(PTA_ZNVER1): New definition.
(PTA_ZNVER2): Likewise.
(PTA_ZNVER3): Likewise.
(PTA_ZNVER4): Likewise.
* config/i386/i386.md (define_attr "cpu"): Add znver4.
* config/i386/x86-tune-costs.h (znver4_cost): New definition.
* config/i386/x86-tune-sched.cc (ix86_issue_rate): Add znver4.
(ix86_adjust_cost): Likewise.
* config/i386/znver1.md: Add new reservations for znver4.
* doc/extend.texi: Add details about znver4.
* doc/invoke.texi: Likewise.
gcc/testsuite/ChangeLog:
* gcc.target/i386/funcspec-56.inc: Handle new march.
* g++.target/i386/mv29.C: Likewise.
Although I didn't check all the details of the new scheduler model,
the patch LGTM for mainline.
BTW: Perhaps znver1.md is not the right filename anymore, since it
hosts all four Zen schedulers.
Thanks,
Uros.
