[arm] Add support for Arm Cortex-A76

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.

	* 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.

From-SVN: r262179

gcc/ChangeLog

+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.
+
 2018-06-27 Tamar Christina  <tamar.christina@arm.com>
 
 	PR target/85769

gcc/config/arm/arm-cpus.in

@@ -1341,6 +1341,15 @@ 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
@@ -1353,6 +1362,16 @@ 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

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

gcc/config/arm/arm-tune.md

@@ -49,6 +49,7 @@
 	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)")))

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"},

gcc/doc/invoke.texi

@@ -16207,8 +16207,8 @@ 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},
@@ -16232,7 +16232,7 @@ 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}.