arm: Add support for Armv8.9-A and Armv9.4-A

This patch adds AArch32 support for -march=armv8.9-a and
-march=armv9.4-a. The behaviour of the new options can be
expressed using a combination of existing feature flags
and tables.

The cpu_arch_ver entries for ARM_ARCH_V9_4A and ARM_ARCH_V8_9A
are technically redundant but it including them for macro code
consistency across architectures.

9 files changed, 64 insertions, 0 deletions

diff --git a/gas/NEWS b/gas/NEWS
index 3dede06..74df7e6 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,7 @@
 -*- text -*-
 
+* Add support for 'armv8.9-a' and 'armv9.4-a' for -march in Arm GAS.
+
 * Initial support for Intel APX: 32 GPRs, NDD, PUSH2/POP2 and PUSHP/POPP.
 
 * On RISC-V macro instructions expanding to AUIPC and a load, store, or branch
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 228e5e0..9c4bf56 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -32022,6 +32022,7 @@ static const struct arm_ext_table armv86a_ext_table[] =
 
 #define armv87a_ext_table armv86a_ext_table
 #define armv88a_ext_table armv87a_ext_table
+#define armv89a_ext_table armv88a_ext_table
 
 static const struct arm_ext_table armv9a_ext_table[] =
 {
@@ -32041,6 +32042,7 @@ static const struct arm_ext_table armv9a_ext_table[] =
 #define armv91a_ext_table armv86a_ext_table
 #define armv92a_ext_table armv91a_ext_table
 #define armv93a_ext_table armv92a_ext_table
+#define armv94a_ext_table armv93a_ext_table
 
 #define CDE_EXTENSIONS \
   ARM_ADD ("cdecp0", ARM_FEATURE_CORE_HIGH (ARM_EXT2_CDE | ARM_EXT2_CDE0)), \
@@ -32166,10 +32168,12 @@ static const struct arm_arch_option_table arm_archs[] =
   ARM_ARCH_OPT2 ("armv8.6-a",	  ARM_ARCH_V8_6A,	FPU_ARCH_VFP, armv86a),
   ARM_ARCH_OPT2 ("armv8.7-a",	  ARM_ARCH_V8_7A,	FPU_ARCH_VFP, armv87a),
   ARM_ARCH_OPT2 ("armv8.8-a",	  ARM_ARCH_V8_8A,	FPU_ARCH_VFP, armv88a),
+  ARM_ARCH_OPT2 ("armv8.9-a",	  ARM_ARCH_V8_9A,	FPU_ARCH_VFP, armv89a),
   ARM_ARCH_OPT2 ("armv9-a",	  ARM_ARCH_V9A,		FPU_ARCH_VFP, armv9a),
   ARM_ARCH_OPT2 ("armv9.1-a",	  ARM_ARCH_V9_1A,	FPU_ARCH_VFP, armv91a),
   ARM_ARCH_OPT2 ("armv9.2-a",	  ARM_ARCH_V9_2A,	FPU_ARCH_VFP, armv92a),
   ARM_ARCH_OPT2 ("armv9.3-a",	  ARM_ARCH_V9_2A,	FPU_ARCH_VFP, armv93a),
+  ARM_ARCH_OPT2 ("armv9.4-a",	  ARM_ARCH_V9_4A,	FPU_ARCH_VFP, armv94a),
   ARM_ARCH_OPT ("xscale",	  ARM_ARCH_XSCALE,	FPU_ARCH_VFP),
   ARM_ARCH_OPT ("iwmmxt",	  ARM_ARCH_IWMMXT,	FPU_ARCH_VFP),
   ARM_ARCH_OPT ("iwmmxt2",	  ARM_ARCH_IWMMXT2,	FPU_ARCH_VFP),
@@ -32955,10 +32959,12 @@ static const cpu_arch_ver_table cpu_arch_ver[] =
     {TAG_CPU_ARCH_V8,	    ARM_ARCH_V8_6A},
     {TAG_CPU_ARCH_V8,	    ARM_ARCH_V8_7A},
     {TAG_CPU_ARCH_V8,	    ARM_ARCH_V8_8A},
+    {TAG_CPU_ARCH_V8,	    ARM_ARCH_V8_9A},
     {TAG_CPU_ARCH_V9,	    ARM_ARCH_V9A},
     {TAG_CPU_ARCH_V9,	    ARM_ARCH_V9_1A},
     {TAG_CPU_ARCH_V9,	    ARM_ARCH_V9_2A},
     {TAG_CPU_ARCH_V9,	    ARM_ARCH_V9_3A},
+    {TAG_CPU_ARCH_V9,	    ARM_ARCH_V9_4A},
     {-1,		    ARM_ARCH_NONE}
 };
 
diff --git a/gas/doc/c-arm.texi b/gas/doc/c-arm.texi
index 0a54073..ec1ed9d 100644
--- a/gas/doc/c-arm.texi
+++ b/gas/doc/c-arm.texi
@@ -268,10 +268,12 @@ names are recognized:
 @code{armv8.6-a},
 @code{armv8.7-a},
 @code{armv8.8-a},
+@code{armv8.9-a},
 @code{armv9-a},
 @code{armv9.1-a},
 @code{armv9.2-a},
 @code{armv9.3-a},
+@code{armv9.4-a},
 @code{iwmmxt},
 @code{iwmmxt2}
 and
diff --git a/gas/testsuite/gas/arm/attr-march-armv8_9-a.d b/gas/testsuite/gas/arm/attr-march-armv8_9-a.d
new file mode 100644
index 0000000..e1d8feb
--- /dev/null
+++ b/gas/testsuite/gas/arm/attr-march-armv8_9-a.d
@@ -0,0 +1,17 @@
+# name: attributes for -march=armv8.9-a
+# source: blank.s
+# as: -march=armv8.9-a
+# readelf: -A
+# This test is only valid on EABI based ports.
+# target: *-*-*eabi* *-*-nacl*
+
+Attribute Section: aeabi
+File Attributes
+  Tag_CPU_name: "8.9-A"
+  Tag_CPU_arch: v8
+  Tag_CPU_arch_profile: Application
+  Tag_ARM_ISA_use: Yes
+  Tag_THUMB_ISA_use: Thumb-2
+  Tag_Advanced_SIMD_arch: NEON for ARMv8.1
+  Tag_MPextension_use: Allowed
+  Tag_Virtualization_use: TrustZone and Virtualization Extensions
diff --git a/gas/testsuite/gas/arm/attr-march-armv9_4-a.d b/gas/testsuite/gas/arm/attr-march-armv9_4-a.d
new file mode 100644
index 0000000..b989114
--- /dev/null
+++ b/gas/testsuite/gas/arm/attr-march-armv9_4-a.d
@@ -0,0 +1,17 @@
+# name: check for armv9.4-a command line option settings
+# source: blank.s
+# as: -march=armv9.4-a
+# readelf: -A
+# This test is only valid on EABI based ports.
+# target: *-*-*eabi* *-*-nacl*
+
+Attribute Section: aeabi
+File Attributes
+  Tag_CPU_name: "9.4-A"
+  Tag_CPU_arch: v9
+  Tag_CPU_arch_profile: Application
+  Tag_ARM_ISA_use: Yes
+  Tag_THUMB_ISA_use: Thumb-2
+  Tag_Advanced_SIMD_arch: NEON for ARMv8.1
+  Tag_MPextension_use: Allowed
+  Tag_Virtualization_use: TrustZone and Virtualization Extensions
diff --git a/gas/testsuite/gas/arm/bfloat16-armv8.9-a.d b/gas/testsuite/gas/arm/bfloat16-armv8.9-a.d
new file mode 100644
index 0000000..8c32abd
--- /dev/null
+++ b/gas/testsuite/gas/arm/bfloat16-armv8.9-a.d
@@ -0,0 +1,5 @@
+#name: Bfloat 16 extension (Armv8.9-A)
+#source: bfloat16.s
+#as: -mno-warn-deprecated -march=armv8.9-a+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/bfloat16-armv9.4-a.d b/gas/testsuite/gas/arm/bfloat16-armv9.4-a.d
new file mode 100644
index 0000000..d78876c
--- /dev/null
+++ b/gas/testsuite/gas/arm/bfloat16-armv9.4-a.d
@@ -0,0 +1,5 @@
+#name: Bfloat 16 extension (Armv9.4-A)
+#source: bfloat16.s
+#as: -mno-warn-deprecated -march=armv9.4-a+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/i8mm-armv8.9-a.d b/gas/testsuite/gas/arm/i8mm-armv8.9-a.d
new file mode 100644
index 0000000..a2a28ae
--- /dev/null
+++ b/gas/testsuite/gas/arm/i8mm-armv8.9-a.d
@@ -0,0 +1,5 @@
+#name: Int8 Matrix Multiply extension (Armv8.9-A)
+#source: i8mm.s
+#as: -mno-warn-deprecated -march=armv8.9-a+i8mm+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/i8mm-armv9.4-a.d b/gas/testsuite/gas/arm/i8mm-armv9.4-a.d
new file mode 100644
index 0000000..3929410
--- /dev/null
+++ b/gas/testsuite/gas/arm/i8mm-armv9.4-a.d
@@ -0,0 +1,5 @@
+#name: Int8 Matrix Multiply extension (Armv9.4-A)
+#source: i8mm.s
+#as: -mno-warn-deprecated -march=armv9.4-a+i8mm+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...