[ARM] Add support for ARMv8-R in assembler and readelf

=== Context ===

This patch is part of a patch series to add support for ARMv8-R
architecture. Its purpose is to add support for ARMv8-R in GAS:
instructions, build attributes and readelf.

=== Patch description ===

Although some differences exist for system registers, from GAS point of
view ARMv8-R supports the same instructions as ARMv8-A Aarch32 state
and a subset of its extensions. This patch therefore introduce a new
feature bit to distinguish the availability of the pan, ras and rdma
extensions between ARMv8-A and ARMv8-R and allow crypto, fp and simd
extensions to be used by ARMv8-R.

Most of the changes are then in the testsuite to (i) rename source files
and error output to be shared between ARMv8-A and ARMv8-R, (ii) rename
files with expected output for ARMv8-A build attributes and (iii) add
new files with expected output for ARMv8-R build attributes.

2017-06-24  Thomas Preud'homme  <thomas.preudhomme@arm.com>

binutils/
	* readelf.c (arm_attr_tag_CPU_arch): Fill value for ARMv8-R.

gas/
	* NEWS: Mention support for ARMv8-R architecture.
	* config/tc-arm.c (arm_archs): Add entry for ARMv8-R.
	(arm_extensions): Restrict pan, ras and rdma extension to
	ARMv8-A and make crypto, fp and simd extensions available to
	ARMv8-R.
	(cpu_arch_ver): Add entry for ARMv8-R.
	(aeabi_set_public_attributes): Update gas_assert for Tag_DIV_use
	logic.
	* testsuite/gas/arm/armv8-a+fp.s: Rename into ...
	* testsuite/gas/arm/armv8-ar+fp.s: This.  Remove .arch directive.
	* testsuite/gas/arm/armv8-a+fp.d: Specify source to assemble and
	architecture to assemble for.
	* testsuite/gas/arm/armv8-r+fp.d: New.
	* testsuite/gas/arm/armv8-a+simd.s: Rename into ...
	* testsuite/gas/arm/armv8-ar+simd.s: This.  Remove .arch directive.
	* testsuite/gas/arm/armv8-a+simd.d: Specify source to assemble and
	architecture to assemble for.
	* testsuite/gas/arm/armv8-r+simd.d: New.
	* testsuite/gas/arm/armv8-a-bad.s: Rename into ...
	* testsuite/gas/arm/armv8-ar-bad.s: This.  Remove .arch directive.
	* testsuite/gas/arm/armv8-a-bad.l: Rename into ...
	* testsuite/gas/arm/armv8-ar-bad.l: This.  Decrement line number by 1.
	* testsuite/gas/arm/armv8-a-bad.d: Specify source to assemble,
	architecture to assemble for and adjust error output file.
	* testsuite/gas/arm/armv8-r-bad.d: New.
	* testsuite/gas/arm/armv8-a-barrier.s: Rename into ...
	* testsuite/gas/arm/armv8-ar-barrier.s: This.
	* testsuite/gas/arm/armv8-a-barrier-arm.d: Adjust source.
	* testsuite/gas/arm/armv8-a-barrier-thumb.d: Likewise.
	* testsuite/gas/arm/armv8-r-barrier-arm.d: New.
	* testsuite/gas/arm/armv8-r-barrier-thumb.d: New.
	* testsuite/gas/arm/armv8-a-it-bad.s: Rename into ...
	* testsuite/gas/arm/armv8-ar-it-bad.s: This.  Remove .arch directive.
	* testsuite/gas/arm/armv8-a-it-bad.l: Rename into ...
	* testsuite/gas/arm/armv8-ar-it-bad.l: This.  Decrement line number
	by 1.
	* testsuite/gas/arm/armv8-a-it-bad.d: Specify source to assemble,
	architecture to assemble for and adjust error output file.
	* testsuite/gas/arm/armv8-r-it-bad.d: New.
	* testsuite/gas/arm/armv8-a.s: Rename into ...
	* testsuite/gas/arm/armv8-ar.s: This.  Remove .arch directive.
	* testsuite/gas/arm/armv8-a.d: Specify source to assemble and
	architecture to assemble for.
	* testsuite/gas/arm/armv8-r.d: New.
	* testsuite/gas/arm/attr-march-armv8-r+crypto.d: New.
	* testsuite/gas/arm/attr-march-armv8-r+fp.d: New.
	* testsuite/gas/arm/attr-march-armv8-r+simd.d: New.
	* testsuite/gas/arm/attr-march-armv8-r.d: New.
	* testsuite/gas/arm/crc32.s: Rename into ...
	* testsuite/gas/arm/crc32-armv8-ar.s: This.
	* testsuite/gas/arm/crc32.d: Rename into ...
	* testsuite/gas/arm/crc32-armv8-a.d: This.  Specify source to assemble.
	* testsuite/gas/arm/crc32-armv8-r.d: New.
	* testsuite/gas/arm/crc32-bad.s: Rename into ...
	* testsuite/gas/arm/crc32-armv8-ar-bad.s: This.
	* testsuite/gas/arm/crc32-bad.d: Rename into ...
	* testsuite/gas/arm/crc32-armv8-a-bad.d: This.  Specify source to
	assemble.
	* testsuite/gas/arm/crc32-armv8-r-bad.d: New.
	* testsuite/gas/arm/mask_1.s: Rename into ...
	* testsuite/gas/arm/mask_1-armv8-ar.s: This.
	* testsuite/gas/arm/mask_1.d: Rename into ...
	* testsuite/gas/arm/mask_1-armv8-a.d: This.  Specify source to
	assemble.
	* testsuite/gas/arm/mask_1-armv8-r.d: new.

include/
	* elf/arm.h (TAG_CPU_ARCH_V8R): New macro.
	* opcode/arm.h (ARM_EXT2_V8A): New macro.
	(ARM_AEXT2_V8A): Rename into ...
	(ARM_AEXT2_V8AR): This.
	(ARM_AEXT2_V8A): New macro.
	(ARM_AEXT_V8R): New macro.
	(ARM_AEXT2_V8R): New macro.
	(ARM_ARCH_V8R): New macro.

3 files changed, 18 insertions, 1 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index ec910a3..7df0bfa 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,5 +1,16 @@
 2017-06-24  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
+	* elf/arm.h (TAG_CPU_ARCH_V8R): New macro.
+	* opcode/arm.h (ARM_EXT2_V8A): New macro.
+	(ARM_AEXT2_V8A): Rename into ...
+	(ARM_AEXT2_V8AR): This.
+	(ARM_AEXT2_V8A): New macro.
+	(ARM_AEXT_V8R): New macro.
+	(ARM_AEXT2_V8R): New macro.
+	(ARM_ARCH_V8R): New macro.
+
+2017-06-24  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
 	* opcode/arm.h (ARM_AEXT_V4TxM): Add ARM_EXT_OS bit to the set.
 	(ARM_AEXT_V4T): Likewise.
 	(ARM_AEXT_V5TxM): Likewise.
diff --git a/include/elf/arm.h b/include/elf/arm.h
index 270aa45..30a31e6 100644
--- a/include/elf/arm.h
+++ b/include/elf/arm.h
@@ -106,6 +106,7 @@
 #define TAG_CPU_ARCH_V6S_M	12
 #define TAG_CPU_ARCH_V7E_M	13
 #define TAG_CPU_ARCH_V8		14
+#define TAG_CPU_ARCH_V8R	15
 #define TAG_CPU_ARCH_V8M_BASE	16
 #define TAG_CPU_ARCH_V8M_MAIN	17
 #define MAX_TAG_CPU_ARCH	TAG_CPU_ARCH_V8M_MAIN
diff --git a/include/opcode/arm.h b/include/opcode/arm.h
index 62683a3..e2049a0 100644
--- a/include/opcode/arm.h
+++ b/include/opcode/arm.h
@@ -65,6 +65,7 @@
 #define ARM_EXT2_V8M_MAIN  0x00000040	/* ARMv8-M Mainline.  */
 #define ARM_EXT2_RAS	 0x00000080	/* RAS extension.  */
 #define ARM_EXT2_V8_3A	 0x00000100	/* ARM V8.3A.  */
+#define ARM_EXT2_V8A	 0x00000200	/* ARMv8-A.  */
 
 /* Co-processor space extensions.  */
 #define ARM_CEXT_XSCALE   0x00000001	/* Allow MIA etc.          */
@@ -149,7 +150,8 @@
 #define ARM_AEXT_V8A \
   (ARM_AEXT_V7A | ARM_EXT_MP | ARM_EXT_SEC | ARM_EXT_DIV | ARM_EXT_ADIV \
    | ARM_EXT_VIRT | ARM_EXT_V8)
-#define ARM_AEXT2_V8A	(ARM_EXT2_V6T2_V8M | ARM_EXT2_ATOMICS)
+#define ARM_AEXT2_V8AR	(ARM_EXT2_V6T2_V8M | ARM_EXT2_ATOMICS)
+#define ARM_AEXT2_V8A	(ARM_AEXT2_V8AR | ARM_EXT2_V8A)
 #define ARM_AEXT2_V8_1A	(ARM_AEXT2_V8A | ARM_EXT2_PAN)
 #define ARM_AEXT2_V8_2A	(ARM_AEXT2_V8_1A | ARM_EXT2_V8_2A | ARM_EXT2_RAS)
 #define ARM_AEXT2_V8_3A	(ARM_AEXT2_V8_2A | ARM_EXT2_V8_3A)
@@ -159,6 +161,8 @@
 #define ARM_AEXT2_V8M	(ARM_EXT2_V8M | ARM_EXT2_ATOMICS | ARM_EXT2_V6T2_V8M)
 #define ARM_AEXT2_V8M_MAIN (ARM_AEXT2_V8M | ARM_EXT2_V8M_MAIN)
 #define ARM_AEXT2_V8M_MAIN_DSP ARM_AEXT2_V8M_MAIN
+#define ARM_AEXT_V8R	ARM_AEXT_V8A
+#define ARM_AEXT2_V8R	ARM_AEXT2_V8AR
 
 /* Processors with specific extensions in the co-processor space.  */
 #define ARM_ARCH_XSCALE	ARM_FEATURE_LOW (ARM_AEXT_V5TE, ARM_CEXT_XSCALE)
@@ -282,6 +286,7 @@
 					    ARM_AEXT2_V8M_MAIN)
 #define ARM_ARCH_V8M_MAIN_DSP ARM_FEATURE_CORE (ARM_AEXT_V8M_MAIN_DSP, \
 						ARM_AEXT2_V8M_MAIN_DSP)
+#define ARM_ARCH_V8R	ARM_FEATURE_CORE (ARM_AEXT_V8R, ARM_AEXT2_V8R)
 
 /* Some useful combinations:  */
 #define ARM_ARCH_NONE	ARM_FEATURE_LOW (0, 0)