aarch64: Add support for Armv9.5-A architecture

The new -march=armv9.5-a flag enables access to the
mandatory cpa, lut and faminmax extensions.
Existing test cases for features are extended to verify they
work without additional flags.

gas/NEWS

@@ -1,5 +1,7 @@
 -*- text -*-
 
+* Add support for 'armv9.5-a' for -march in AArch64 GAS.
+
 * In x86 Intel syntax undue mnemonic suffixes are now warned about.  This is
   a first step towards rejecting their use where unjustified.
 

gas/config/tc-aarch64.c

@@ -10595,6 +10595,7 @@ static const struct aarch64_arch_option_table aarch64_archs[] = {
   {"armv9.2-a",	AARCH64_ARCH_FEATURES (V9_2A)},
   {"armv9.3-a",	AARCH64_ARCH_FEATURES (V9_3A)},
   {"armv9.4-a",	AARCH64_ARCH_FEATURES (V9_4A)},
+  {"armv9.5-a", AARCH64_ARCH_FEATURES (V9_5A)},
   {NULL, AARCH64_NO_FEATURES}
 };
 

gas/doc/c-aarch64.texi

@@ -116,7 +116,7 @@ following architecture names are recognized: @code{armv8-a},
 @code{armv8.1-a}, @code{armv8.2-a}, @code{armv8.3-a}, @code{armv8.4-a}
 @code{armv8.5-a}, @code{armv8.6-a}, @code{armv8.7-a}, @code{armv8.8-a},
 @code{armv8.9-a}, @code{armv8-r}, @code{armv9-a}, @code{armv9.1-a},
-@code{armv9.2-a}, @code{armv9.3-a} and @code{armv9.4-a}.
+@code{armv9.2-a}, @code{armv9.3-a}, @code{armv9.4-a} and @code{armv9.5-a}.
 
 If both @option{-mcpu} and @option{-march} are specified, the
 assembler will use the setting for @option{-mcpu}.  If neither are
@@ -334,6 +334,7 @@ automatically cause those extensions to be disabled.
 @item @code{armv9.2-a} @tab @code{armv9.1-a}, @code{armv8.7-a}
 @item @code{armv9.3-a} @tab @code{armv9.2-a}, @code{armv8.8-a}
 @item @code{armv9.4-a} @tab @code{armv9.3-a}, @code{armv8.9-a}
+@item @code{armv9.5-a} @tab @code{armv9.4-a}, @code{cpa}, @code{lut}, @code{faminmax}
 @item @code{armv8-r} @tab @code{armv8.4-a+nolor}
 @end multitable
 

gas/testsuite/gas/aarch64/advsimd-faminmax.d

@@ -1,4 +1,5 @@
 #objdump: -dr
+#as: -march=armv9.5-a
 #as: -march=armv8-a+faminmax
 
 .*:     file format .*

gas/testsuite/gas/aarch64/advsimd-lut.d

@@ -1,4 +1,5 @@
 #objdump: -dr
+#as: -march=armv9.5-a
 #as: -march=armv8-a+lut
 
 .*:     file format .*

gas/testsuite/gas/aarch64/armv9_5.d

@@ -0,0 +1,10 @@
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0+ <.*>:
+[^:]+:	9a002000 	addpt	x0, x0, x0
+[^:]+:	0ec01c00 	famax	v0.4h, v0.4h, v0.4h
+[^:]+:	4e801000 	luti2	v0.16b, {v0.16b}, v0\[0\]

gas/testsuite/gas/aarch64/armv9_5.s

@@ -0,0 +1,9 @@
+	.text
+
+	.arch	armv9.5-a
+	// CPA
+	addpt   x0, x0, x0
+	// FAMINMAX
+	famax	v0.4h, v0.4h, v0.4h
+	// LUT
+	luti2	v0.16b, { v0.16b }, v0[0]

gas/testsuite/gas/aarch64/cpa-addsub.d

@@ -1,4 +1,5 @@
 #name: Tests for CPA instructions ((M)ADDPT and (M)SUBPT).
+#as: -march=armv9.5-a
 #as: -march=armv8-a+cpa
 #objdump: -dr
 

gas/testsuite/gas/aarch64/cpa-sve.d

@@ -1,4 +1,5 @@
 #name: Tests for CPA+SVE instructions.
+#as: -march=armv9.5-a+sve
 #as: -march=armv8-a+sve+cpa
 #objdump: -dr
 

gas/testsuite/gas/aarch64/sme2-faminmax.d

@@ -1,4 +1,5 @@
 #objdump: -dr
+#as: -march=armv9.5-a+sme2
 #as: -march=armv8-a+faminmax+sme2
 
 .*:     file format .*

gas/testsuite/gas/aarch64/sve2-faminmax.d

@@ -1,4 +1,5 @@
 #objdump: -dr
+#as: -march=armv9.5-a+sve2
 #as: -march=armv8-a+faminmax+sve2
 
 .*:     file format .*

gas/testsuite/gas/aarch64/sve2-lut.d

@@ -1,4 +1,5 @@
 #objdump: -dr
+#as: -march=armv9.5-a+sve2
 #as: -march=armv8-a+lut+sve2
 
 .*:     file format .*

include/opcode/aarch64.h

@@ -269,6 +269,8 @@ enum aarch64_feature_bit {
   AARCH64_FEATURE_FP8DOT2_SVE,
   /* +sme-f16f16 or +sme-f8f16  */
   AARCH64_FEATURE_SME_F16F16_F8F16,
+  /* Armv9.5-A processors.  */
+  AARCH64_FEATURE_V9_5A,
   AARCH64_NUM_FEATURES
 };
 
@@ -361,6 +363,10 @@ enum aarch64_feature_bit {
 #define AARCH64_ARCH_V9_3A_FEATURES(X)	AARCH64_ARCH_V8_8A_FEATURES (X)
 #define AARCH64_ARCH_V9_4A_FEATURES(X)	(AARCH64_ARCH_V8_9A_FEATURES (X) \
 					 | AARCH64_FEATBIT (X, SVE2p1))
+#define AARCH64_ARCH_V9_5A_FEATURES(X)	(AARCH64_FEATBIT (X, V9_5A)	\
+					 | AARCH64_FEATBIT (X, CPA)	\
+					 | AARCH64_FEATBIT (X, LUT)	\
+					 | AARCH64_FEATBIT (X, FAMINMAX))
 
 /* Architectures are the sum of the base and extensions.  */
 #define AARCH64_ARCH_V8A(X)	(AARCH64_FEATBIT (X, V8) \
@@ -398,6 +404,8 @@ enum aarch64_feature_bit {
 				 | AARCH64_ARCH_V9_3A_FEATURES (X))
 #define AARCH64_ARCH_V9_4A(X)	(AARCH64_ARCH_V9_3A (X) \
 				 | AARCH64_ARCH_V9_4A_FEATURES (X))
+#define AARCH64_ARCH_V9_5A(X)	(AARCH64_ARCH_V9_4A (X) \
+				 | AARCH64_ARCH_V9_5A_FEATURES (X))
 
 #define AARCH64_ARCH_NONE(X)	0