[binutils-gdb/binutils-2_42-branch] aarch64: Enable +cssc for armv8.9-a

[Andrew Carlotti]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a1e3cb45c676da0f5be0237a05e2af3542d62ace

commit a1e3cb45c676da0f5be0237a05e2af3542d62ace
Author: Andrew Carlotti <andrew.carlotti@arm.com>
Date:   Fri Apr 12 13:35:00 2024 +0100

    aarch64: Enable +cssc for armv8.9-a
    
    FEAT_CSSC is mandatory in the architecture from Armv8.9.

Diff:
---
 gas/testsuite/gas/aarch64/cssc.d | 1 +
 include/opcode/aarch64.h         | 1 +
 2 files changed, 2 insertions(+)

diff --git a/gas/testsuite/gas/aarch64/cssc.d b/gas/testsuite/gas/aarch64/cssc.d
index d41df24b916..f6ff9d207a2 100644
--- a/gas/testsuite/gas/aarch64/cssc.d
+++ b/gas/testsuite/gas/aarch64/cssc.d
@@ -1,5 +1,6 @@
 #name: CSSC extension
 #as: -march=armv8-a+cssc
+#as: -march=armv8.9-a
 #objdump: -dr
 
 .*:     file format .*
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 8ab7de233ee..44fc5faf695 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -287,6 +287,7 @@ enum aarch64_feature_bit {
 					 | AARCH64_FEATBIT (X, MOPS)	\
 					 | AARCH64_FEATBIT (X, HBC))
 #define AARCH64_ARCH_V8_9A_FEATURES(X)	(AARCH64_FEATBIT (X, V8_9A)	\
+					 | AARCH64_FEATBIT (X, CSSC) \
 					 | AARCH64_FEATBIT (X, SPEv1p4) \
 					 | AARCH64_FEATBIT (X, SPE_CRR)	\
 					 | AARCH64_FEATBIT (X, SPE_FDS) \