arm: add armv9-a architecture to -march

Update also include:
	+ New value of Tag_CPU_arch EABI attribute (22) is added.
	+ Updated missing Tag_CPU_arch EABI attributes.
	+ Updated how we combine archs 'v4t_plus_v6_m' as this mechanism
	  have to handle new Armv9 as well.

Regression tested on `arm-none-eabi` cross Binutils and no issues.

bfd/

	* archures.c: Define bfd_mach_arm_9.
	* bfd-in2.h (bfd_mach_arm_9): Define bfd_mach_arm_9.
	* cpu-arm.c: Add 'armv9-a' option to -march.
	* elf32-arm.c (using_thumb2_bl): Update assert check.
	(arch_has_arm_nop): Add TAG_CPU_ARCH_V9.
	(bfd_arm_get_mach_from_attributes): Add case for TAG_CPU_ARCH_V9.
	Update assert.
	(tag_cpu_arch_combine): Updated table.
	(v9): New table..

binutils/

	* readelf.c (arm_attr_tag_CPU_arch): Update with

elfcpp/

	* arm.h: Update TAG_CPU_ARCH_ enums with correct values.

gas/

	* NEWS: Update docs.
	* config/tc-arm.c (get_aeabi_cpu_arch_from_fset): Return Armv9-a
	for -amarch=all.
	(aeabi_set_public_attributes): Update assert.
	* doc/c-arm.texi: Update docs.
	* testsuite/gas/arm/armv9-a_arch.d: New test.
	* testsuite/gas/arm/attr-march-all.d: Update test with v9.

include/

	* elf/arm.h Update TAG_CPU_ARCH_ defines with correct values.
	* opcode/arm.h (ARM_EXT3_V9A): New macro.
	(ARM_ARCH_NONE): Updated with arm_feature_set.core size.
	(FPU_NONE): Updated.
	(ARM_ANY): Updated.
	(ARM_ARCH_UNKNOWN): New macro.
	(ARM_FEATURE_LOW): Updated.
	(ARM_FEATURE_CORE): Updated.
	(ARM_FEATURE_CORE_LOW): Updated.
	(ARM_FEATURE_CORE_HIGH): Updated.
	(ARM_FEATURE_COPROC): Updated.
	(ARM_FEATURE): Updated.
	(ARM_FEATURE_ALL): New macro.

opcodes/

	* arm-dis.c (select_arm_features): Support bfd_mach_arm_9.
	Also Update bfd_mach_arm_unknown to use new macro ARM_ARCH_UNKNOWN.

2 files changed, 25 insertions, 12 deletions

diff --git a/include/elf/arm.h b/include/elf/arm.h
index 299f394..8213b90 100644
--- a/include/elf/arm.h
+++ b/include/elf/arm.h
@@ -111,8 +111,12 @@
 #define TAG_CPU_ARCH_V8R	15
 #define TAG_CPU_ARCH_V8M_BASE	16
 #define TAG_CPU_ARCH_V8M_MAIN	17
+#define TAG_CPU_ARCH_8_1A       18
+#define TAG_CPU_ARCH_8_2A       19
+#define TAG_CPU_ARCH_8_3A       20
 #define TAG_CPU_ARCH_V8_1M_MAIN 21
-#define MAX_TAG_CPU_ARCH	TAG_CPU_ARCH_V8_1M_MAIN
+#define TAG_CPU_ARCH_V9         22
+#define MAX_TAG_CPU_ARCH	TAG_CPU_ARCH_V9
 /* Pseudo-architecture to allow objects to be compatible with the subset of
    armv4t and armv6-m.  This value should never be stored in object files.  */
 #define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1)
diff --git a/include/opcode/arm.h b/include/opcode/arm.h
index 4a6044f..cf72b90 100644
--- a/include/opcode/arm.h
+++ b/include/opcode/arm.h
@@ -94,6 +94,7 @@
 					   Authentication and Branch
 					   Target Identification
 					   Extension.  */
+#define ARM_EXT3_V9A	        0x00000002 /* Armv9-A.	               */
 
 /* Co-processor space extensions.  */
 #define ARM_CEXT_XSCALE	     0x00000001	/* Allow MIA etc.	 	   */
@@ -385,11 +386,16 @@
 #define ARM_ARCH_V8R	       ARM_FEATURE_CORE (ARM_AEXT_V8R, ARM_AEXT2_V8R)
 #define ARM_ARCH_V8_1M_MAIN    ARM_FEATURE_CORE (ARM_AEXT_V8_1M_MAIN,	   \
 						 ARM_AEXT2_V8_1M_MAIN)
+#define ARM_ARCH_V9A	       ARM_FEATURE_ALL(ARM_AEXT_V8A,	   \
+				      ARM_AEXT2_V8_5A | ARM_EXT2_CRC,	   \
+				      ARM_EXT3_V9A,	   \
+                      FPU_NEON_EXT_RDMA	| FPU_NEON_EXT_DOTPROD)
 
 /* Some useful combinations:  */
-#define ARM_ARCH_NONE	ARM_FEATURE_LOW (0, 0)
-#define FPU_NONE	ARM_FEATURE_LOW (0, 0)
-#define ARM_ANY		ARM_FEATURE (-1, -1 & ~ (ARM_EXT2_MVE | ARM_EXT2_MVE_FP), 0)	/* Any basic core.  */
+#define ARM_ARCH_NONE	ARM_FEATURE_ALL (0, 0, 0, 0)
+#define FPU_NONE	ARM_FEATURE_ALL (0, 0, 0, 0)
+#define ARM_ARCH_UNKNOWN	ARM_FEATURE_ALL (-1, -1 & ~(ARM_EXT2_MVE | ARM_EXT2_MVE_FP), -1, -1)	/* Machine type is unknown.  */
+#define ARM_ANY		ARM_FEATURE_ALL (-1, -1 & ~(ARM_EXT2_MVE | ARM_EXT2_MVE_FP), -1, 0)	/* Any basic core.  */
 #define FPU_ANY		ARM_FEATURE_COPROC (-1 & ~(ARM_CEXT_XSCALE | ARM_CEXT_IWMMXT | ARM_CEXT_IWMMXT2)) /* Any FPU.  */
 #define FPU_ANY_HARD	ARM_FEATURE_COPROC (FPU_FPA | FPU_VFP_HARD | FPU_MAVERICK)
 /* Extensions containing some Thumb-2 instructions.  If any is present, Thumb
@@ -429,8 +435,8 @@
 
 /* There are too many feature bits to fit in a single word, so use a
    structure.  For simplicity we put all core features in array CORE
-   and everything else in the other.  All the bits in element core[0]
-   have been occupied, so new feature should use bit in element core[1]
+   and everything else in the other.  All the bits in element core[0:1]
+   have been occupied, so new feature should use bit in element core[2]
    and use macro ARM_FEATURE to initialize the feature set variable.  */
 typedef struct
 {
@@ -494,10 +500,13 @@ typedef struct
    && (T1).core[1] == (T2).core[1]		\
    && (T1).core[2] == (T2).core[2])
 
-#define ARM_FEATURE_LOW(core, coproc) {{(core), 0}, (coproc)}
-#define ARM_FEATURE_CORE(core1, core2) {{(core1), (core2)}, 0}
-#define ARM_FEATURE_CORE_LOW(core) {{(core), 0}, 0}
-#define ARM_FEATURE_CORE_HIGH(core) {{0, (core)}, 0}
+#define ARM_FEATURE_LOW(core, coproc) {{(core), 0, 0}, (coproc)}
+#define ARM_FEATURE_CORE(core1, core2) {{(core1), (core2), 0}, 0}
+#define ARM_FEATURE_CORE_LOW(core) {{(core), 0, 0}, 0}
+#define ARM_FEATURE_CORE_HIGH(core) {{0, (core), 0}, 0}
 #define ARM_FEATURE_CORE_HIGH_HIGH(core) {{0, 0, (core)}, 0}
-#define ARM_FEATURE_COPROC(coproc) {{0, 0}, (coproc)}
-#define ARM_FEATURE(core1, core2, coproc) {{(core1), (core2)}, (coproc)}
+#define ARM_FEATURE_COPROC(coproc) {{0, 0, 0}, (coproc)}
+#define ARM_FEATURE(core1, core2, coproc) {{(core1), (core2), 0}, (coproc)}
+/* Below macro is used to set all fields in arm_feature_set struct.
+*/
+#define ARM_FEATURE_ALL(core1, core2, core3, coproc) {{(core1), (core2), (core3)}, (coproc)}