[AArch64, 1/6] Enable ARMv8.5-A in gcc

This patch is part of a series that enables ARMv8.5-A in GCC and
adds Branch Target Identification Mechanism.

*** gcc/ChangeLog ***

2018-01-09  Sudakshina Das  <sudi.das@arm.com>

	* config/aarch64/aarch64-arches.def: Define AARCH64_ARCH for
	ARMv8.5-A.
	* gcc/config/aarch64/aarch64.h (AARCH64_FL_V8_5): New.
	(AARCH64_FL_FOR_ARCH8_5, AARCH64_ISA_V8_5): New.
	* gcc/doc/invoke.texi: Document ARMv8.5-A.

From-SVN: r267765

gcc/ChangeLog

+2018-01-09  Sudakshina Das  <sudi.das@arm.com>
+
+	* config/aarch64/aarch64-arches.def: Define AARCH64_ARCH for
+	ARMv8.5-A.
+	* gcc/config/aarch64/aarch64.h (AARCH64_FL_V8_5): New.
+	(AARCH64_FL_FOR_ARCH8_5, AARCH64_ISA_V8_5): New.
+	* gcc/doc/invoke.texi: Document ARMv8.5-A.
+
 2019-01-09  Alejandro Martinez  <alejandro.martinezvicente@arm.com>
 
 	* config/aarch64/aarch64-sve.md (copysign<mode>3): New define_expand.

gcc/config/aarch64/aarch64-arches.def

@@ -35,5 +35,6 @@ AARCH64_ARCH("armv8.1-a",     generic,	     8_1A,	8,  AARCH64_FL_FOR_ARCH8_1)
 AARCH64_ARCH("armv8.2-a",     generic,	     8_2A,	8,  AARCH64_FL_FOR_ARCH8_2)
 AARCH64_ARCH("armv8.3-a",     generic,	     8_3A,	8,  AARCH64_FL_FOR_ARCH8_3)
 AARCH64_ARCH("armv8.4-a",     generic,	     8_4A,	8,  AARCH64_FL_FOR_ARCH8_4)
+AARCH64_ARCH("armv8.5-a",     generic,	     8_5A,	8,  AARCH64_FL_FOR_ARCH8_5)
 
 #undef AARCH64_ARCH

gcc/config/aarch64/aarch64.h

@@ -177,6 +177,9 @@ extern unsigned aarch64_architecture_version;
 /* Statistical Profiling extensions.  */
 #define AARCH64_FL_PROFILE    (1 << 21)
 
+/* ARMv8.5-A architecture extensions.  */
+#define AARCH64_FL_V8_5	      (1 << 22)  /* Has ARMv8.5-A features.  */
+
 /* Has FP and SIMD.  */
 #define AARCH64_FL_FPSIMD     (AARCH64_FL_FP | AARCH64_FL_SIMD)
 
@@ -195,6 +198,8 @@ extern unsigned aarch64_architecture_version;
 #define AARCH64_FL_FOR_ARCH8_4			\
   (AARCH64_FL_FOR_ARCH8_3 | AARCH64_FL_V8_4 | AARCH64_FL_F16FML \
    | AARCH64_FL_DOTPROD | AARCH64_FL_RCPC8_4)
+#define AARCH64_FL_FOR_ARCH8_5			\
+  (AARCH64_FL_FOR_ARCH8_4 | AARCH64_FL_V8_5)
 
 /* Macros to test ISA flags.  */
 
@@ -216,6 +221,7 @@ extern unsigned aarch64_architecture_version;
 #define AARCH64_ISA_SHA3	   (aarch64_isa_flags & AARCH64_FL_SHA3)
 #define AARCH64_ISA_F16FML	   (aarch64_isa_flags & AARCH64_FL_F16FML)
 #define AARCH64_ISA_RCPC8_4	   (aarch64_isa_flags & AARCH64_FL_RCPC8_4)
+#define AARCH64_ISA_V8_5	   (aarch64_isa_flags & AARCH64_FL_V8_5)
 
 /* Crypto is an optional extension to AdvSIMD.  */
 #define TARGET_CRYPTO (TARGET_SIMD && AARCH64_ISA_CRYPTO)

gcc/doc/invoke.texi

@@ -15628,8 +15628,11 @@ more feature modifiers.  This option has the form
 @option{-march=@var{arch}@r{@{}+@r{[}no@r{]}@var{feature}@r{@}*}}.
 
 The permissible values for @var{arch} are @samp{armv8-a},
-@samp{armv8.1-a}, @samp{armv8.2-a}, @samp{armv8.3-a} or @samp{armv8.4-a}
-or @var{native}.
+@samp{armv8.1-a}, @samp{armv8.2-a}, @samp{armv8.3-a}, @samp{armv8.4-a},
+@samp{armv8.5-a} or @var{native}.
+
+The value @samp{armv8.5-a} implies @samp{armv8.4-a} and enables compiler
+support for the ARMv8.5-A architecture extensions.
 
 The value @samp{armv8.4-a} implies @samp{armv8.3-a} and enables compiler
 support for the ARMv8.4-A architecture extensions.