[PATCH][arm] Add support for Arm Ares

[Kyrill Tkachov <kyrylo dot tkachov at foss dot arm dot com>]

Hi all,

This adds support for the Arm Ares CPU for in the arm port.
It implements the Armv8.2-A architecture with the optional features
of statistical profiling, dot product and FP16 on by default.

Note: Ares is a codename to enable early adopters and in time
we will add the final product name once it's announced.

Bootstrapped and tested on arm-none-linux-gnueabihf.

Will commit to trunk with the aarch64 patch once that is approved.

Thanks,
Kyrill

2018-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

    * config/arm/arm-cpus.in (ares): New entry.
    * config/arm/arm-tables.opt: Regenerate.
    * config/arm/arm-tune.md: Likewise.
    * doc/invoke.texi (ARM Options): Document ares.

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index d82e95a226659948e59b317f07e0fd386ed674a2..b3163a90260c66a8df18d00282443434dee96e15 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1376,6 +1376,17 @@ begin cpu cortex-a76
  part d0b
 end cpu cortex-a76
 
+begin cpu ares
+ cname ares
+ tune for cortex-a57
+ tune flags LDSCHED
+ architecture armv8.2-a+fp16+dotprod+simd
+ option crypto add FP_ARMv8 CRYPTO
+ costs cortex_a57
+ vendor 41
+ part d0c
+end cpu ares
+
 # ARMv8.2 A-profile ARM DynamIQ big.LITTLE implementations
 begin cpu cortex-a75.cortex-a55
  cname cortexa75cortexa55
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index eacee746a39912d04aa03c636f9a95e0e72ce43b..ceac4b4be419c9bd27db281e9880948ff5c40d76 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -282,6 +282,9 @@ Enum(processor_type) String(cortex-a75) Value( TARGET_CPU_cortexa75)
 EnumValue
 Enum(processor_type) String(cortex-a76) Value( TARGET_CPU_cortexa76)
 
+EnumValue
+Enum(processor_type) String(ares) Value( TARGET_CPU_ares)
+
 EnumValue
 Enum(processor_type) String(cortex-a75.cortex-a55) Value( TARGET_CPU_cortexa75cortexa55)
 
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index f64c1ef176de6c31659cce35326de8393e9cd886..2bd7e8741166af43f606cee1eb2cc3a0c712af29 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -49,7 +49,7 @@ (define_attr "tune"
 	cortexa72,cortexa73,exynosm1,
 	xgene1,cortexa57cortexa53,cortexa72cortexa53,
 	cortexa73cortexa35,cortexa73cortexa53,cortexa55,
-	cortexa75,cortexa76,cortexa75cortexa55,
-	cortexa76cortexa55,cortexm23,cortexm33,
-	cortexr52"
+	cortexa75,cortexa76,ares,
+	cortexa75cortexa55,cortexa76cortexa55,cortexm23,
+	cortexm33,cortexr52"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 5f051ed1acca32a6bd0bb673691a55b72b239c96..81c6232283b0607703f1f3381f1135ebdda36bfe 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -16693,8 +16693,8 @@ Permissible names are: @samp{arm2}, @samp{arm250},
 @samp{cortex-a9}, @samp{cortex-a12}, @samp{cortex-a15}, @samp{cortex-a17},
 @samp{cortex-a32}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a55},
 @samp{cortex-a57}, @samp{cortex-a72}, @samp{cortex-a73}, @samp{cortex-a75},
-@samp{cortex-a76}, @samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-r5},
-@samp{cortex-r7}, @samp{cortex-r8}, @samp{cortex-r52},
+@samp{cortex-a76}, @samp{ares}, @samp{cortex-r4}, @samp{cortex-r4f},
+@samp{cortex-r5}, @samp{cortex-r7}, @samp{cortex-r8}, @samp{cortex-r52},
 @samp{cortex-m33},
 @samp{cortex-m23},
 @samp{cortex-m7},