[arm] Add support for Arm Cortex-A76

Message ID 5B335DF0.2010201@foss.arm.com
State New
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  • [arm] Add support for Arm Cortex-A76
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Commit Message

Kyrill Tkachov June 27, 2018, 9:50 a.m.
Hi all,

The Cortex-A76 is an Armv8.2-A processor with dotproduct and FP16 support.
It can be paired with the Cortex-A55 and hence the option
-mcpu/-mtune=cortex-a76.cortex-a55 is also introduced.

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

Committing to trunk.

Thanks,
Kyrill

2018-06-27  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/arm/arm-cpus.in (cortex-a76): New entry.
     (cortex-a76.cortex-a55): Likewise.
     * config/arm/arm-tables.opt: Regenerate.
     * config/arm/arm-tune.md: Likewise.
     * config/arm/driver-arm.c (arm_cpu_table): Add Cortex-A76 entry.
     * doc/invoke.texi (ARM Options): Document cortex-a76 and
     cortex-a76.cortex-a55.

Patch

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index aec73b5cae0b9d62c521c230aff510ce3d816e3b..e100610a58364f78489a72ea8bfdfedf8d3ca47b 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1339,6 +1339,15 @@  begin cpu cortex-a75
  costs cortex_a73
 end cpu cortex-a75
 
+begin cpu cortex-a76
+ cname cortexa76
+ tune for cortex-a57
+ tune flags LDSCHED
+ architecture armv8.2-a+fp16+dotprod
+ fpu neon-fp-armv8
+ option crypto add FP_ARMv8 CRYPTO
+ costs cortex_a57
+end cpu cortex-a76
 
 # ARMv8.2 A-profile ARM DynamIQ big.LITTLE implementations
 begin cpu cortex-a75.cortex-a55
@@ -1351,6 +1360,16 @@  begin cpu cortex-a75.cortex-a55
  costs cortex_a73
 end cpu cortex-a75.cortex-a55
 
+begin cpu cortex-a76.cortex-a55
+ cname cortexa76cortexa55
+ tune for cortex-a53
+ tune flags LDSCHED
+ architecture armv8.2-a+fp16+dotprod
+ fpu neon-fp-armv8
+ option crypto add FP_ARMv8 CRYPTO
+ costs cortex_a57
+end cpu cortex-a76.cortex-a55
+
 # 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 0ffb4c86ca46718bbfaf65eb41ab8e87f924e903..eacee746a39912d04aa03c636f9a95e0e72ce43b 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -280,9 +280,15 @@  EnumValue
 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(cortex-a75.cortex-a55) Value( TARGET_CPU_cortexa75cortexa55)
 
 EnumValue
+Enum(processor_type) String(cortex-a76.cortex-a55) Value( TARGET_CPU_cortexa76cortexa55)
+
+EnumValue
 Enum(processor_type) String(cortex-m23) Value( TARGET_CPU_cortexm23)
 
 EnumValue
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index 877e3465147b8b829166b8c0f9c464ca38e0b73a..f64c1ef176de6c31659cce35326de8393e9cd886 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -49,6 +49,7 @@  (define_attr "tune"
 	cortexa72,cortexa73,exynosm1,
 	xgene1,cortexa57cortexa53,cortexa72cortexa53,
 	cortexa73cortexa35,cortexa73cortexa53,cortexa55,
-	cortexa75,cortexa75cortexa55,cortexm23,
-	cortexm33,cortexr52"
+	cortexa75,cortexa76,cortexa75cortexa55,
+	cortexa76cortexa55,cortexm23,cortexm33,
+	cortexr52"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/config/arm/driver-arm.c b/gcc/config/arm/driver-arm.c
index dc2f1de01a8de89adccfde3834ae7a04fa3095a6..356a5e664b6bb9489f98d3cfe54703f6aadf8ed4 100644
--- a/gcc/config/arm/driver-arm.c
+++ b/gcc/config/arm/driver-arm.c
@@ -56,6 +56,7 @@  static struct vendor_cpu arm_cpu_table[] = {
     {"0xd09", "armv8-a+crc", "cortex-a73"},
     {"0xd05", "armv8.2-a+fp16+dotprod", "cortex-a55"},
     {"0xd0a", "armv8.2-a+fp16+dotprod", "cortex-a75"},
+    {"0xd0b", "armv8.2-a+fp16+dotprod", "cortex-a76"},
     {"0xc14", "armv7-r", "cortex-r4"},
     {"0xc15", "armv7-r", "cortex-r5"},
     {"0xc17", "armv7-r", "cortex-r7"},
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index a56b6afc0167e8589aa3b5372c29342e3372a833..a6f432422c96e84c161d11786f795f2c35ec7e97 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -16281,8 +16281,8 @@  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{cortex-a76}, @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},
@@ -16306,7 +16306,7 @@  of the code for a big.LITTLE system.  Permissible names are:
 @samp{cortex-a15.cortex-a7}, @samp{cortex-a17.cortex-a7},
 @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53},
 @samp{cortex-a72.cortex-a35}, @samp{cortex-a73.cortex-a53},
-@samp{cortex-a75.cortex-a55}.
+@samp{cortex-a75.cortex-a55}, @samp{cortex-a76.cortex-a55}.
 
 @option{-mtune=generic-@var{arch}} specifies that GCC should tune the
 performance for a blend of processors within architecture @var{arch}.