[AArch64][Patch 1/5] Support the ARMv8.2 Statistical Profiling Extension.

The Statistical Profile extension included in the ARMv8.2 architecture
adds a number of system registers and a new instruction. This patch set
adds support for the extension to binutils, enabled when
-march=armv8.2-a+profile is given.

The patches in this series:
- Add the new command line option and feature flags.
- Add the new system registers.
- Adjust the maximum number of aliases permitted for an instruction.
- Add support for HINT aliases which take operands.
- Add the new instruction, an alias of the HINT instruction.

This patch adds the option "profile" to the permitted architecture
extensions, disabling it by default.

gas/
2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>

	* config/tc-aarch64.c (aarch64_features): Add "profile".
	* doc/c-aarch64.texi (AArch64 Extensions): Add "profile".

include/opcode/
2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64.h (AARCH64_FEATURE_PROFILE): New.

Change-Id: If9bb4a9b69a264180f96f8ffaf10b15ced273699

5 files changed, 13 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index aa6454e..2fcad8e 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
+
+	* config/tc-aarch64.c (aarch64_features): Add "profile".
+	* doc/c-aarch64.texi (AArch64 Extensions): Add "profile".
+
 2015-12-10  Matthew Wahab  <matthew.wahab@arm.com>
 
 	* config/tc-aarch64.c (parse_sys_ins_reg): Add check of
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index bb2f228..2f115ec 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -7744,6 +7744,7 @@ static const struct aarch64_option_cpu_value_table aarch64_features[] = {
 					 | AARCH64_FEATURE_RDMA, 0)},
   {"fp16",		AARCH64_FEATURE (AARCH64_FEATURE_F16
 					 | AARCH64_FEATURE_FP, 0)},
+  {"profile",		AARCH64_FEATURE (AARCH64_FEATURE_PROFILE, 0)},
   {NULL,		AARCH64_ARCH_NONE}
 };
 
diff --git a/gas/doc/c-aarch64.texi b/gas/doc/c-aarch64.texi
index 363366a..cba768d 100644
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -145,6 +145,8 @@ automatically cause those extensions to be disabled.
 @item @code{fp16} @tab ARMv8.2-A @tab ARMv8.2-A or later
  @tab Enable ARMv8.2 16-bit floating-point support.  This implies
  @code{fp}.
+@item @code{profile} @tab ARMv8.2-A @tab No
+ @tab Enable statistical profiling extensions.
 @end multitable
 
 @node AArch64 Syntax
diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 0a186e8..c4c4784 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
+
+	* aarch64.h (AARCH64_FEATURE_PROFILE): New.
+
 2015-12-10  Matthew Wahab  <matthew.wahab@arm.com>
 
 	* aarch64.h (aarch64_sys_ins_reg_supported_p): Declare.
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 7477066..27509dad 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -50,6 +50,7 @@ typedef uint32_t aarch64_insn;
 #define AARCH64_FEATURE_V8_1	0x01000000	/* v8.1 features.  */
 #define AARCH64_FEATURE_F16	0x02000000	/* v8.2 FP16 instructions.  */
 #define AARCH64_FEATURE_RAS	0x04000000	/* RAS Extensions.  */
+#define AARCH64_FEATURE_PROFILE	0x08000000	/* Statistical Profiling.  */
 
 /* Architectures are the sum of the base and extensions.  */
 #define AARCH64_ARCH_V8		AARCH64_FEATURE (AARCH64_FEATURE_V8, \