arm: Add support for Armv8.7-A and Armv8.8-A

This patch adds AArch32 support for -march=armv8.[78]-a.
The behaviour of the new options can be expressed using a
combination of existing feature flags and tables.

The cpu_arch_ver entries are technically redundant but
it seemed less surprising to include them anyway.

include/
	* opcode/arm.h (ARM_ARCH_V8_7A, ARM_ARCH_V8_8A): New macros.

gas/
	* doc/c-arm.texi: Add armv8.7-a and armv8.8-a.
	* config/tc-arm.c (armv87a_ext_table, armv88a_ext_table): New macros.
	(arm_archs): Add armv8.7-a and armv8.8-a.
	(cpu_arch_ver): Add ARM_ARCH_V8_7A and ARM_ARCH_V8_8A.
	* NEWS: Mention the above.
	* testsuite/gas/arm/attr-march-armv8_7-a.d: New test.
	* testsuite/gas/arm/attr-march-armv8_8-a.d: Likewise.
	* testsuite/gas/arm/bfloat16-armv8.7-a.d: Likewise.
	* testsuite/gas/arm/bfloat16-armv8.8-a.d: Likewise.
	* testsuite/gas/arm/i8mm-armv8.7-a.d: Likewise.
	* testsuite/gas/arm/i8mm-armv8.8-a.d: Likewise.

9 files changed, 65 insertions, 1 deletions

diff --git a/gas/NEWS b/gas/NEWS
index d0dca5b..82d5aa5 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -31,7 +31,8 @@
 * Add support for 'armv8.8-a', 'armv9-a', 'armv9.1-a', 'armv9.2-a' and
   'armv9.3-a' for -march in AArch64 GAS.
 
-* Add support for 'armv9-a' for -march in Arm GAS.
+* Add support for 'armv8.7-a', 'armv8.8-a', and 'armv9-a' for -march
+  in Arm GAS.
 
 * Add support for Intel AVX512_FP16 instructions.
 
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index fad1775..50320fe 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -31954,6 +31954,9 @@ static const struct arm_ext_table armv86a_ext_table[] =
   { NULL, 0, ARM_ARCH_NONE, ARM_ARCH_NONE }
 };
 
+#define armv87a_ext_table armv86a_ext_table
+#define armv88a_ext_table armv87a_ext_table
+
 static const struct arm_ext_table armv9a_ext_table[] =
 {
   ARM_ADD ("simd", FPU_ARCH_DOTPROD_NEON_VFP_ARMV8),
@@ -32091,6 +32094,8 @@ static const struct arm_arch_option_table arm_archs[] =
   ARM_ARCH_OPT2 ("armv8.4-a",	  ARM_ARCH_V8_4A,	FPU_ARCH_VFP, armv84a),
   ARM_ARCH_OPT2 ("armv8.5-a",	  ARM_ARCH_V8_5A,	FPU_ARCH_VFP, armv85a),
   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 ("armv9-a",	  ARM_ARCH_V9A,	FPU_ARCH_VFP, armv9a),
   ARM_ARCH_OPT ("xscale",	  ARM_ARCH_XSCALE,	FPU_ARCH_VFP),
   ARM_ARCH_OPT ("iwmmxt",	  ARM_ARCH_IWMMXT,	FPU_ARCH_VFP),
@@ -32875,6 +32880,8 @@ static const cpu_arch_ver_table cpu_arch_ver[] =
     {TAG_CPU_ARCH_V8,	      ARM_ARCH_V8_5A},
     {TAG_CPU_ARCH_V8_1M_MAIN, ARM_ARCH_V8_1M_MAIN},
     {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_V9,	    ARM_ARCH_V9A},
     {-1,		    ARM_ARCH_NONE}
 };
diff --git a/gas/doc/c-arm.texi b/gas/doc/c-arm.texi
index 4b5656e..49a9127 100644
--- a/gas/doc/c-arm.texi
+++ b/gas/doc/c-arm.texi
@@ -265,6 +265,8 @@ names are recognized:
 @code{armv8-m.main},
 @code{armv8.1-m.main},
 @code{armv8.6-a},
+@code{armv8.7-a},
+@code{armv8.8-a},
 @code{armv9-a},
 @code{iwmmxt},
 @code{iwmmxt2}
diff --git a/gas/testsuite/gas/arm/attr-march-armv8_7-a.d b/gas/testsuite/gas/arm/attr-march-armv8_7-a.d
new file mode 100644
index 0000000..38f0429
--- /dev/null
+++ b/gas/testsuite/gas/arm/attr-march-armv8_7-a.d
@@ -0,0 +1,17 @@
+# name: attributes for -march=armv8.7-a
+# source: blank.s
+# as: -march=armv8.7-a
+# readelf: -A
+# This test is only valid on EABI based ports.
+# target: *-*-*eabi* *-*-nacl*
+
+Attribute Section: aeabi
+File Attributes
+  Tag_CPU_name: "8.7-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-armv8_8-a.d b/gas/testsuite/gas/arm/attr-march-armv8_8-a.d
new file mode 100644
index 0000000..64db000
--- /dev/null
+++ b/gas/testsuite/gas/arm/attr-march-armv8_8-a.d
@@ -0,0 +1,17 @@
+# name: attributes for -march=armv8.8-a
+# source: blank.s
+# as: -march=armv8.8-a
+# readelf: -A
+# This test is only valid on EABI based ports.
+# target: *-*-*eabi* *-*-nacl*
+
+Attribute Section: aeabi
+File Attributes
+  Tag_CPU_name: "8.8-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/bfloat16-armv8.7-a.d b/gas/testsuite/gas/arm/bfloat16-armv8.7-a.d
new file mode 100644
index 0000000..c898958
--- /dev/null
+++ b/gas/testsuite/gas/arm/bfloat16-armv8.7-a.d
@@ -0,0 +1,5 @@
+#name: Bfloat 16 extension (Armv8.7-A)
+#source: bfloat16.s
+#as: -mno-warn-deprecated -march=armv8.7-a+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/bfloat16-armv8.8-a.d b/gas/testsuite/gas/arm/bfloat16-armv8.8-a.d
new file mode 100644
index 0000000..0741624
--- /dev/null
+++ b/gas/testsuite/gas/arm/bfloat16-armv8.8-a.d
@@ -0,0 +1,5 @@
+#name: Bfloat 16 extension (Armv8.8-A)
+#source: bfloat16.s
+#as: -mno-warn-deprecated -march=armv8.8-a+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/i8mm-armv8.7-a.d b/gas/testsuite/gas/arm/i8mm-armv8.7-a.d
new file mode 100644
index 0000000..881060b
--- /dev/null
+++ b/gas/testsuite/gas/arm/i8mm-armv8.7-a.d
@@ -0,0 +1,5 @@
+#name: Int8 Matrix Multiply extension (Armv8.7-A)
+#source: i8mm.s
+#as: -mno-warn-deprecated -march=armv8.7-a+i8mm+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...
diff --git a/gas/testsuite/gas/arm/i8mm-armv8.8-a.d b/gas/testsuite/gas/arm/i8mm-armv8.8-a.d
new file mode 100644
index 0000000..ab15b31
--- /dev/null
+++ b/gas/testsuite/gas/arm/i8mm-armv8.8-a.d
@@ -0,0 +1,5 @@
+#name: Int8 Matrix Multiply extension (Armv8.8-A)
+#source: i8mm.s
+#as: -mno-warn-deprecated -march=armv8.8-a+i8mm+simd -I$srcdir/$subdir
+#objdump: -dr --show-raw-insn
+#...