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| author | Omar Tahir <omar.tahir@arm.com> | 2020-08-04 17:35:18 +0100 |
|---|---|---|
| committer | Kyrylo Tkachov <kyrylo.tkachov@arm.com> | 2020-08-04 17:37:01 +0100 |
| commit | 079b13f64cee9d6c208c9c490ab6b35055c299ce (patch) | |
| tree | 8089a740d9b0ffb7644be5262065c18f702a336d | |
| parent | 03c547d6659cbd3dec594aa801d94f68305c3652 (diff) | |
| download | gcc-079b13f64cee9d6c208c9c490ab6b35055c299ce.zip gcc-079b13f64cee9d6c208c9c490ab6b35055c299ce.tar.gz gcc-079b13f64cee9d6c208c9c490ab6b35055c299ce.tar.bz2 | |
[Arm] Modify default tuning of armv8.1-m.main to use Cortex-M55
Previously, compiling with -march=armv8.1-m.main would tune for
Cortex-M7.
However, the Cortex-M7 only supports up to Armv7e-M. The Cortex-M55 is
the earliest CPU that supports Armv8.1-M Mainline so is more appropriate.
This also has the effect of changing the branch cost function used, which
will be necessary to correctly prioritise conditional instructions over branches
in the rest of this patch series.
Regression tested on arm-none-eabi.
gcc/ChangeLog
2020-08-04 Omar Tahir <omar.tahir@arm.com>
* config/arm/arm-cpus.in (armv8.1-m.main): Tune for Cortex-M55.
| -rw-r--r-- | gcc/config/arm/arm-cpus.in | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in index 728be50..c98f8ed 100644 --- a/gcc/config/arm/arm-cpus.in +++ b/gcc/config/arm/arm-cpus.in @@ -716,7 +716,7 @@ begin arch armv8-r end arch armv8-r begin arch armv8.1-m.main - tune for cortex-m7 + tune for cortex-m55 tune flags CO_PROC base 8M_MAIN profile M |