Hi,
Recently, Arm announced the Cortex-M52, delivering increased performance
in DSP and ML along with a range of other features and benefits.
For the completeness of Arm ecosystem, we hope that cortex-m52 support
could be available in gcc-14.
Attached is the patch to support cortex-m52 cpu with MVE and PACBTI enabled in
GCC.
Bootstrapped and tested on arm-none-eabi.
Is it OK for trunk?
Regards,
jasonwucj
From d0856b516c5d270a852f3edd9df5dadccde5b94e Mon Sep 17 00:00:00 2001
From: Chung-Ju Wu <[email protected]>
Date: Wed, 6 Dec 2023 15:49:58 +0800
Subject: [PATCH 1/2] arm: Add support for Arm Cortex-M52 CPU.
This patch adds the -mcpu support for the Arm Cortex-M52 CPU which is
an Armv8.1-M Mainline CPU supporting MVE and PACBTI by default.
-mcpu=cortex-m52 switch by default matches to
-march=armv8.1-m.main+pacbti+mve.fp+fp.dp.
The cde feature is supported by specifying +cdecpN (e.g.
-mcpu=cortex-m52+cdecp<N>),
where N is the coprocessor number 0 to 7.
Also following options are provided to disable default features.
+nomve.fp (disables MVE Floating point)
+nomve (disables MVE Integer and MVE Floating point)
+nodsp (disables dsp, MVE Integer and MVE Floating point)
+nopacbti (disables pacbti)
+nofp (disables floating point and MVE floating point)
Signed-off-by: Chung-Ju Wu <[email protected]>
gcc/ChangeLog:
* config/arm/arm-cpus.in (cortex-m52): New cpu.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm-tune.md: Regenerate.
---
gcc/config/arm/arm-cpus.in | 21 +++++++++++++++++++++
gcc/config/arm/arm-tables.opt | 3 +++
gcc/config/arm/arm-tune.md | 6 +++---
3 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 6fa7e315ef0..451b15fe9f9 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1641,6 +1641,27 @@ begin cpu cortex-m35p
costs v7m
end cpu cortex-m35p
+begin cpu cortex-m52
+ cname cortexm52
+ tune flags LDSCHED
+ architecture armv8.1-m.main+pacbti+mve.fp+fp.dp
+ option nopacbti remove pacbti
+ option nomve.fp remove mve_float
+ option nomve remove mve mve_float
+ option nofp remove ALL_FP mve_float
+ option nodsp remove MVE mve_float
+ option cdecp0 add cdecp0
+ option cdecp1 add cdecp1
+ option cdecp2 add cdecp2
+ option cdecp3 add cdecp3
+ option cdecp4 add cdecp4
+ option cdecp5 add cdecp5
+ option cdecp6 add cdecp6
+ option cdecp7 add cdecp7
+ isa quirk_no_asmcpu quirk_vlldm
+ costs v7m
+end cpu cortex-m52
+
begin cpu cortex-m55
cname cortexm55
tune flags LDSCHED
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index 9d6ae875ede..d3eb9a97739 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -282,6 +282,9 @@ Enum(processor_type) String(cortex-m33) Value(
TARGET_CPU_cortexm33)
EnumValue
Enum(processor_type) String(cortex-m35p) Value( TARGET_CPU_cortexm35p)
+EnumValue
+Enum(processor_type) String(cortex-m52) Value( TARGET_CPU_cortexm52)
+
EnumValue
Enum(processor_type) String(cortex-m55) Value( TARGET_CPU_cortexm55)
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index 7318f03b97e..6a631d82966 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -49,7 +49,7 @@
cortexa710,cortexx1,cortexx1c,
neoversen1,cortexa75cortexa55,cortexa76cortexa55,
neoversev1,neoversen2,cortexm23,
- cortexm33,cortexm35p,cortexm55,
- starmc1,cortexm85,cortexr52,
- cortexr52plus"
+ cortexm33,cortexm35p,cortexm52,
+ cortexm55,starmc1,cortexm85,
+ cortexr52,cortexr52plus"
(const (symbol_ref "((enum attr_tune) arm_tune)")))
--
2.34.3
