[hardknott] Add support for Neoverse N2 CPU

This patch backports the AArch32 support for Arm's Neoverse N2 CPU.

Upstream-Status: Backport
[https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054894ad3b23f23415a525230]

Signed-off-by: pgowda <pgowda.cve@gmail.com>
---
 meta/recipes-devtools/gcc/gcc-10.2.inc        |  1 +
 .../0038-aarch64-neoverse-n2-support.patch    | 88 +++++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch

lgtm

On Mon, Dec 20, 2021 at 10:00 PM Pgowda <pgowda.cve@gmail.com> wrote:
>
> This patch backports the AArch32 support for Arm's Neoverse N2 CPU.
>
> Upstream-Status: Backport
> [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054894ad3b23f23415a525230]
>
> Signed-off-by: pgowda <pgowda.cve@gmail.com>
> ---
>  meta/recipes-devtools/gcc/gcc-10.2.inc        |  1 +
>  .../0038-aarch64-neoverse-n2-support.patch    | 88 +++++++++++++++++++
>  2 files changed, 89 insertions(+)
>  create mode 100644 meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
>
> diff --git a/meta/recipes-devtools/gcc/gcc-10.2.inc b/meta/recipes-devtools/gcc/gcc-10.2.inc
> index 5626bf20f0..8fcc53df38 100644
> --- a/meta/recipes-devtools/gcc/gcc-10.2.inc
> +++ b/meta/recipes-devtools/gcc/gcc-10.2.inc
> @@ -74,6 +74,7 @@ SRC_URI = "\
>             file://0002-CVE-2021-35465.patch \
>             file://0003-CVE-2021-35465.patch \
>             file://0004-CVE-2021-35465.patch \
> +           file://0038-aarch64-neoverse-n2-support.patch \
>  "
>  SRC_URI[sha256sum] = "b8dd4368bb9c7f0b98188317ee0254dd8cc99d1e3a18d0ff146c855fe16c1d8c"
>
> diff --git a/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
> new file mode 100644
> index 0000000000..3e42266b81
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
> @@ -0,0 +1,88 @@
> +From d7e8411f6a333d4054894ad3b23f23415a525230 Mon Sep 17 00:00:00 2001
> +From: Alex Coplan <alex.coplan@arm.com>
> +Date: Fri, 2 Oct 2020 16:06:15 +0100
> +Subject: [PATCH] arm: Add support for Neoverse N2 CPU
> +
> +This patch backports the AArch32 support for Arm's Neoverse N2 CPU to
> +GCC 10.
> +
> +gcc/ChangeLog:
> +
> +       * config/arm/arm-cpus.in (neoverse-n2): New.
> +       * config/arm/arm-tables.opt: Regenerate.
> +       * config/arm/arm-tune.md: Regenerate.
> +       * doc/invoke.texi: Document support for Neoverse N2.
> +
> +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054894ad3b23f23415a525230]
> +
> +Signed-off-by: pgowda <pgowda.cve@gmail.com>
> +---
> + gcc/config/arm/arm-cpus.in    | 12 ++++++++++++
> + gcc/config/arm/arm-tables.opt |  3 +++
> + gcc/config/arm/arm-tune.md    |  5 +++--
> + gcc/doc/invoke.texi           |  6 +++---
> + 4 files changed, 21 insertions(+), 5 deletions(-)
> +
> +diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
> +--- a/gcc/config/arm/arm-cpus.in       2021-12-20 20:24:59.912159845 -0800
> ++++ b/gcc/config/arm/arm-cpus.in       2021-12-20 21:00:04.417003845 -0800
> +@@ -1481,6 +1481,18 @@ begin cpu cortex-a76.cortex-a55
> +  costs cortex_a57
> + end cpu cortex-a76.cortex-a55
> +
> ++# Armv8.5 A-profile Architecture Processors
> ++begin cpu neoverse-n2
> ++  cname neoversen2
> ++  tune for cortex-a57
> ++  tune flags LDSCHED
> ++  architecture armv8.5-a+fp16+bf16+i8mm
> ++  option crypto add FP_ARMv8 CRYPTO
> ++  costs cortex_a57
> ++  vendor 41
> ++  part 0xd49
> ++end cpu neoverse-n2
> ++
> + # V8 M-profile implementations.
> + begin cpu cortex-m23
> +  cname cortexm23
> +diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
> +--- a/gcc/config/arm/arm-tables.opt    2020-07-22 23:35:54.688795958 -0700
> ++++ b/gcc/config/arm/arm-tables.opt    2021-12-20 21:00:04.421003776 -0800
> +@@ -253,6 +253,9 @@ EnumValue
> + Enum(processor_type) String(cortex-m23) Value( TARGET_CPU_cortexm23)
> +
> + EnumValue
> ++Enum(processor_type) String(neoverse-n2) Value( TARGET_CPU_neoversen2)
> ++
> ++EnumValue
> + Enum(processor_type) String(cortex-m33) Value( TARGET_CPU_cortexm33)
> +
> + EnumValue
> +diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
> +--- a/gcc/config/arm/arm-tune.md       2020-07-22 23:35:54.684795913 -0700
> ++++ b/gcc/config/arm/arm-tune.md       2021-12-20 21:02:44.630260284 -0800
> +@@ -46,6 +46,6 @@
> +       cortexa73cortexa53,cortexa55,cortexa75,
> +       cortexa76,cortexa76ae,cortexa77,
> +       neoversen1,cortexa75cortexa55,cortexa76cortexa55,
> +-      cortexm23,cortexm33,cortexm35p,
> +-      cortexm55,cortexr52"
> ++      neoversen2,cortexm23,cortexm33,
> ++      cortexm35p,cortexm55,cortexr52"
> +       (const (symbol_ref "((enum attr_tune) arm_tune)")))
> +diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> +--- a/gcc/doc/invoke.texi      2021-12-20 20:24:59.916159782 -0800
> ++++ b/gcc/doc/invoke.texi      2021-12-20 21:03:41.337290704 -0800
> +@@ -18857,9 +18857,9 @@ Permissible names are: @samp{arm7tdmi},
> + @samp{cortex-m35p}, @samp{cortex-m55},
> + @samp{cortex-m1.small-multiply}, @samp{cortex-m0.small-multiply},
> + @samp{cortex-m0plus.small-multiply}, @samp{exynos-m1}, @samp{marvell-pj4},
> +-@samp{neoverse-n1}, @samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2},
> +-@samp{ep9312}, @samp{fa526}, @samp{fa626}, @samp{fa606te}, @samp{fa626te},
> +-@samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> ++@samp{neoverse-n1}, @samp{neoverse-n2}, @samp{xscale}, @samp{iwmmxt},
> ++@samp{iwmmxt2}, @samp{ep9312}, @samp{fa526}, @samp{fa626}, @samp{fa606te},
> ++@samp{fa626te}, @samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> +
> + Additionally, this option can specify that GCC should tune the performance
> + of the code for a big.LITTLE system.  Permissible names are:
> --
> 2.31.1
>
>
> -=-=-=-=-=-=-=-=-=-=-=-
> Links: You receive all messages sent to this group.
> View/Reply Online (#159906): https://lists.openembedded.org/g/openembedded-core/message/159906
> Mute This Topic: https://lists.openembedded.org/mt/87872660/1997914
> Group Owner: openembedded-core+owner@lists.openembedded.org
> Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [raj.khem@gmail.com]
> -=-=-=-=-=-=-=-=-=-=-=-
>

Hi,

Gentle ping on this patch.

Thanks,
Pgowda

On Fri, Dec 24, 2021 at 11:16 AM Khem Raj <raj.khem@gmail.com> wrote:
>
> lgtm
>
> On Mon, Dec 20, 2021 at 10:00 PM Pgowda <pgowda.cve@gmail.com> wrote:
> >
> > This patch backports the AArch32 support for Arm's Neoverse N2 CPU.
> >
> > Upstream-Status: Backport
> > [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054894ad3b23f23415a525230]
> >
> > Signed-off-by: pgowda <pgowda.cve@gmail.com>
> > ---
> >  meta/recipes-devtools/gcc/gcc-10.2.inc        |  1 +
> >  .../0038-aarch64-neoverse-n2-support.patch    | 88 +++++++++++++++++++
> >  2 files changed, 89 insertions(+)
> >  create mode 100644 meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
> >
> > diff --git a/meta/recipes-devtools/gcc/gcc-10.2.inc b/meta/recipes-devtools/gcc/gcc-10.2.inc
> > index 5626bf20f0..8fcc53df38 100644
> > --- a/meta/recipes-devtools/gcc/gcc-10.2.inc
> > +++ b/meta/recipes-devtools/gcc/gcc-10.2.inc
> > @@ -74,6 +74,7 @@ SRC_URI = "\
> >             file://0002-CVE-2021-35465.patch \
> >             file://0003-CVE-2021-35465.patch \
> >             file://0004-CVE-2021-35465.patch \
> > +           file://0038-aarch64-neoverse-n2-support.patch \
> >  "
> >  SRC_URI[sha256sum] = "b8dd4368bb9c7f0b98188317ee0254dd8cc99d1e3a18d0ff146c855fe16c1d8c"
> >
> > diff --git a/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
> > new file mode 100644
> > index 0000000000..3e42266b81
> > --- /dev/null
> > +++ b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-support.patch
> > @@ -0,0 +1,88 @@
> > +From d7e8411f6a333d4054894ad3b23f23415a525230 Mon Sep 17 00:00:00 2001
> > +From: Alex Coplan <alex.coplan@arm.com>
> > +Date: Fri, 2 Oct 2020 16:06:15 +0100
> > +Subject: [PATCH] arm: Add support for Neoverse N2 CPU
> > +
> > +This patch backports the AArch32 support for Arm's Neoverse N2 CPU to
> > +GCC 10.
> > +
> > +gcc/ChangeLog:
> > +
> > +       * config/arm/arm-cpus.in (neoverse-n2): New.
> > +       * config/arm/arm-tables.opt: Regenerate.
> > +       * config/arm/arm-tune.md: Regenerate.
> > +       * doc/invoke.texi: Document support for Neoverse N2.
> > +
> > +Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054894ad3b23f23415a525230]
> > +
> > +Signed-off-by: pgowda <pgowda.cve@gmail.com>
> > +---
> > + gcc/config/arm/arm-cpus.in    | 12 ++++++++++++
> > + gcc/config/arm/arm-tables.opt |  3 +++
> > + gcc/config/arm/arm-tune.md    |  5 +++--
> > + gcc/doc/invoke.texi           |  6 +++---
> > + 4 files changed, 21 insertions(+), 5 deletions(-)
> > +
> > +diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
> > +--- a/gcc/config/arm/arm-cpus.in       2021-12-20 20:24:59.912159845 -0800
> > ++++ b/gcc/config/arm/arm-cpus.in       2021-12-20 21:00:04.417003845 -0800
> > +@@ -1481,6 +1481,18 @@ begin cpu cortex-a76.cortex-a55
> > +  costs cortex_a57
> > + end cpu cortex-a76.cortex-a55
> > +
> > ++# Armv8.5 A-profile Architecture Processors
> > ++begin cpu neoverse-n2
> > ++  cname neoversen2
> > ++  tune for cortex-a57
> > ++  tune flags LDSCHED
> > ++  architecture armv8.5-a+fp16+bf16+i8mm
> > ++  option crypto add FP_ARMv8 CRYPTO
> > ++  costs cortex_a57
> > ++  vendor 41
> > ++  part 0xd49
> > ++end cpu neoverse-n2
> > ++
> > + # V8 M-profile implementations.
> > + begin cpu cortex-m23
> > +  cname cortexm23
> > +diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
> > +--- a/gcc/config/arm/arm-tables.opt    2020-07-22 23:35:54.688795958 -0700
> > ++++ b/gcc/config/arm/arm-tables.opt    2021-12-20 21:00:04.421003776 -0800
> > +@@ -253,6 +253,9 @@ EnumValue
> > + Enum(processor_type) String(cortex-m23) Value( TARGET_CPU_cortexm23)
> > +
> > + EnumValue
> > ++Enum(processor_type) String(neoverse-n2) Value( TARGET_CPU_neoversen2)
> > ++
> > ++EnumValue
> > + Enum(processor_type) String(cortex-m33) Value( TARGET_CPU_cortexm33)
> > +
> > + EnumValue
> > +diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
> > +--- a/gcc/config/arm/arm-tune.md       2020-07-22 23:35:54.684795913 -0700
> > ++++ b/gcc/config/arm/arm-tune.md       2021-12-20 21:02:44.630260284 -0800
> > +@@ -46,6 +46,6 @@
> > +       cortexa73cortexa53,cortexa55,cortexa75,
> > +       cortexa76,cortexa76ae,cortexa77,
> > +       neoversen1,cortexa75cortexa55,cortexa76cortexa55,
> > +-      cortexm23,cortexm33,cortexm35p,
> > +-      cortexm55,cortexr52"
> > ++      neoversen2,cortexm23,cortexm33,
> > ++      cortexm35p,cortexm55,cortexr52"
> > +       (const (symbol_ref "((enum attr_tune) arm_tune)")))
> > +diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> > +--- a/gcc/doc/invoke.texi      2021-12-20 20:24:59.916159782 -0800
> > ++++ b/gcc/doc/invoke.texi      2021-12-20 21:03:41.337290704 -0800
> > +@@ -18857,9 +18857,9 @@ Permissible names are: @samp{arm7tdmi},
> > + @samp{cortex-m35p}, @samp{cortex-m55},
> > + @samp{cortex-m1.small-multiply}, @samp{cortex-m0.small-multiply},
> > + @samp{cortex-m0plus.small-multiply}, @samp{exynos-m1}, @samp{marvell-pj4},
> > +-@samp{neoverse-n1}, @samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2},
> > +-@samp{ep9312}, @samp{fa526}, @samp{fa626}, @samp{fa606te}, @samp{fa626te},
> > +-@samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> > ++@samp{neoverse-n1}, @samp{neoverse-n2}, @samp{xscale}, @samp{iwmmxt},
> > ++@samp{iwmmxt2}, @samp{ep9312}, @samp{fa526}, @samp{fa626}, @samp{fa606te},
> > ++@samp{fa626te}, @samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> > +
> > + Additionally, this option can specify that GCC should tune the performance
> > + of the code for a big.LITTLE system.  Permissible names are:
> > --
> > 2.31.1
> >
> >
> > -=-=-=-=-=-=-=-=-=-=-=-
> > Links: You receive all messages sent to this group.
> > View/Reply Online (#159906): https://lists.openembedded.org/g/openembedded-core/message/159906
> > Mute This Topic: https://lists.openembedded.org/mt/87872660/1997914
> > Group Owner: openembedded-core+owner@lists.openembedded.org
> > Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [raj.khem@gmail.com]
> > -=-=-=-=-=-=-=-=-=-=-=-
> >

On Mon, 2021-12-20 at 22:00 -0800, Pgowda wrote:
> This patch backports the AArch32 support for Arm's Neoverse N2 CPU.
> 
> Upstream-Status: Backport
> [
> https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d405489
> 4ad3b23f23415a525230]
> 
> Signed-off-by: pgowda <pgowda.cve@gmail.com>
> ---
>  meta/recipes-devtools/gcc/gcc-10.2.inc        |  1 +
>  .../0038-aarch64-neoverse-n2-support.patch    | 88
> +++++++++++++++++++
>  2 files changed, 89 insertions(+)
>  create mode 100644 meta/recipes-devtools/gcc/gcc/0038-aarch64-
> neoverse-n2-support.patch
> 
> diff --git a/meta/recipes-devtools/gcc/gcc-10.2.inc b/meta/recipes-
> devtools/gcc/gcc-10.2.inc
> index 5626bf20f0..8fcc53df38 100644
> --- a/meta/recipes-devtools/gcc/gcc-10.2.inc
> +++ b/meta/recipes-devtools/gcc/gcc-10.2.inc
> @@ -74,6 +74,7 @@ SRC_URI = "\
>             file://0002-CVE-2021-35465.patch \
>             file://0003-CVE-2021-35465.patch \
>             file://0004-CVE-2021-35465.patch \
> +           file://0038-aarch64-neoverse-n2-support.patch \



The patch name is talking about adding support for aarch64 but it looks
like its for aarch32? Please also rebase on top of:

https://git.yoctoproject.org/poky-contrib/log/?h=anujm/hardknott

while sending the update.

Thanks,

Anuj


>  "
>  SRC_URI[sha256sum] =
> "b8dd4368bb9c7f0b98188317ee0254dd8cc99d1e3a18d0ff146c855fe16c1d8c"
>  
> diff --git a/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-
> support.patch b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-
> n2-support.patch
> new file mode 100644
> index 0000000000..3e42266b81
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc/0038-aarch64-neoverse-n2-
> support.patch
> @@ -0,0 +1,88 @@
> +From d7e8411f6a333d4054894ad3b23f23415a525230 Mon Sep 17 00:00:00
> 2001
> +From: Alex Coplan <alex.coplan@arm.com>
> +Date: Fri, 2 Oct 2020 16:06:15 +0100
> +Subject: [PATCH] arm: Add support for Neoverse N2 CPU
> +
> +This patch backports the AArch32 support for Arm's Neoverse N2 CPU
> to
> +GCC 10.
> +
> +gcc/ChangeLog:
> +
> +       * config/arm/arm-cpus.in (neoverse-n2): New.
> +       * config/arm/arm-tables.opt: Regenerate.
> +       * config/arm/arm-tune.md: Regenerate.
> +       * doc/invoke.texi: Document support for Neoverse N2.
> +
> +Upstream-Status: Backport
> [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d7e8411f6a333d4054
> 894ad3b23f23415a525230]
> +
> +Signed-off-by: pgowda <pgowda.cve@gmail.com>
> +---
> + gcc/config/arm/arm-cpus.in    | 12 ++++++++++++
> + gcc/config/arm/arm-tables.opt |  3 +++
> + gcc/config/arm/arm-tune.md    |  5 +++--
> + gcc/doc/invoke.texi           |  6 +++---
> + 4 files changed, 21 insertions(+), 5 deletions(-)
> +
> +diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
> +--- a/gcc/config/arm/arm-cpus.in       2021-12-20 20:24:59.912159845
> -0800
> ++++ b/gcc/config/arm/arm-cpus.in       2021-12-20 21:00:04.417003845
> -0800
> +@@ -1481,6 +1481,18 @@ begin cpu cortex-a76.cortex-a55
> +  costs cortex_a57
> + end cpu cortex-a76.cortex-a55
> + 
> ++# Armv8.5 A-profile Architecture Processors
> ++begin cpu neoverse-n2
> ++  cname neoversen2
> ++  tune for cortex-a57
> ++  tune flags LDSCHED
> ++  architecture armv8.5-a+fp16+bf16+i8mm
> ++  option crypto add FP_ARMv8 CRYPTO
> ++  costs cortex_a57
> ++  vendor 41
> ++  part 0xd49
> ++end cpu neoverse-n2
> ++
> + # V8 M-profile implementations.
> + begin cpu cortex-m23
> +  cname cortexm23
> +diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-
> tables.opt
> +--- a/gcc/config/arm/arm-tables.opt    2020-07-22 23:35:54.688795958
> -0700
> ++++ b/gcc/config/arm/arm-tables.opt    2021-12-20 21:00:04.421003776
> -0800
> +@@ -253,6 +253,9 @@ EnumValue
> + Enum(processor_type) String(cortex-m23) Value(
> TARGET_CPU_cortexm23)
> + 
> + EnumValue
> ++Enum(processor_type) String(neoverse-n2) Value(
> TARGET_CPU_neoversen2)
> ++
> ++EnumValue
> + Enum(processor_type) String(cortex-m33) Value(
> TARGET_CPU_cortexm33)
> + 
> + EnumValue
> +diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
> +--- a/gcc/config/arm/arm-tune.md       2020-07-22 23:35:54.684795913
> -0700
> ++++ b/gcc/config/arm/arm-tune.md       2021-12-20 21:02:44.630260284
> -0800
> +@@ -46,6 +46,6 @@
> +       cortexa73cortexa53,cortexa55,cortexa75,
> +       cortexa76,cortexa76ae,cortexa77,
> +       neoversen1,cortexa75cortexa55,cortexa76cortexa55,
> +-      cortexm23,cortexm33,cortexm35p,
> +-      cortexm55,cortexr52"
> ++      neoversen2,cortexm23,cortexm33,
> ++      cortexm35p,cortexm55,cortexr52"
> +       (const (symbol_ref "((enum attr_tune) arm_tune)")))
> +diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> +--- a/gcc/doc/invoke.texi      2021-12-20 20:24:59.916159782 -0800
> ++++ b/gcc/doc/invoke.texi      2021-12-20 21:03:41.337290704 -0800
> +@@ -18857,9 +18857,9 @@ Permissible names are: @samp{arm7tdmi},
> + @samp{cortex-m35p}, @samp{cortex-m55},
> + @samp{cortex-m1.small-multiply}, @samp{cortex-m0.small-multiply},
> + @samp{cortex-m0plus.small-multiply}, @samp{exynos-m1},
> @samp{marvell-pj4},
> +-@samp{neoverse-n1}, @samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2},
> +-@samp{ep9312}, @samp{fa526}, @samp{fa626}, @samp{fa606te},
> @samp{fa626te},
> +-@samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> ++@samp{neoverse-n1}, @samp{neoverse-n2}, @samp{xscale},
> @samp{iwmmxt},
> ++@samp{iwmmxt2}, @samp{ep9312}, @samp{fa526}, @samp{fa626},
> @samp{fa606te},
> ++@samp{fa626te}, @samp{fmp626}, @samp{fa726te}, @samp{xgene1}.
> + 
> + Additionally, this option can specify that GCC should tune the
> performance
> + of the code for a big.LITTLE system.  Permissible names are:
> 
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