[PATCH][GCC 8] arm: Add support for Neoverse V1 CPU

[Alex Coplan]

Hello,

This patch backports the AArch32 support for Arm's Neoverse V1 CPU to
GCC 8.

Testing:
 * Bootstrapped and regtested on arm-none-linux-gnueabihf.

OK for GCC 8 branch?

Thanks,
Alex

---

gcc/ChangeLog:

        * config/arm/arm-cpus.in (neoverse-v1): New.
        * config/arm/arm-tables.opt: Regenerate.
        * config/arm/arm-tune.md: Regenerate.
        * doc/invoke.texi: Document AArch32 support for Neoverse V1.

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index ba194a80229..edfe5b378da 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1576,6 +1576,18 @@ begin cpu cortex-a75.cortex-a55
  costs cortex_a73
 end cpu cortex-a75.cortex-a55
 
+
+# Armv8.4 A-profile Architecture Processors
+begin cpu neoverse-v1
+  cname neoversev1
+  tune for cortex-a57
+  tune flags LDSCHED
+  architecture armv8.4-a+fp16
+  option crypto add FP_ARMv8 CRYPTO
+  costs cortex_a57
+end cpu neoverse-v1
+
+
 # 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
index 60e5065b398..36dba62003a 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -351,6 +351,9 @@ Enum(processor_type) String(cortex-a75) Value( 
TARGET_CPU_cortexa75)
 EnumValue
 Enum(processor_type) String(cortex-a75.cortex-a55) Value( 
TARGET_CPU_cortexa75cortexa55)
 
+EnumValue
+Enum(processor_type) String(neoverse-v1) Value( TARGET_CPU_neoversev1)
+
 EnumValue
 Enum(processor_type) String(cortex-m23) Value( TARGET_CPU_cortexm23)
 
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index df43a1ccbb2..c972ce55576 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -57,6 +57,6 @@
        cortexa73,exynosm1,xgene1,
        cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,
        cortexa73cortexa53,cortexa55,cortexa75,
-       cortexa75cortexa55,cortexm23,cortexm33,
-       cortexr52"
+       cortexa75cortexa55,neoversev1,cortexm23,
+       cortexm33,cortexr52"
        (const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index a46a9cb31f7..6b40362e412 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -16334,8 +16334,8 @@ 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-r4}, @samp{cortex-r4f}, @samp{cortex-r5}, @samp{cortex-r7},
-@samp{cortex-r8}, @samp{cortex-r52},
+@samp{neoverse-v1}, @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},