From: Richard Sandiford <richard.sandiford@arm.com>
Date: Thu, 31 Mar 2022 16:51:16 +0000 (+0100)
Subject: aarch64: Relax check for RNG system registers
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=025f768ffc3aeb5561bb60a9c8f3841faa53bd6f;p=binutils-gdb.git

aarch64: Relax check for RNG system registers

FEAT_RNG is an optional Armv8.5-A extension, but it can be backported
to earlier architectures as well.  GAS previously made the RNG registers
conditional on having both armv8.5-a and +rng, but only +rng should be
required.

This seems to be the only feature that was handled like this.

opcodes/
	* aarch64-opc.c (SR_RNG): Don't require V8_5.

gas/
	* testsuite/gas/aarch64/rng-1.s, testsuite/gas/aarch64/rng-1.d: New
	test.
---

diff --git a/gas/testsuite/gas/aarch64/rng-1.d b/gas/testsuite/gas/aarch64/rng-1.d
new file mode 100644
index 00000000000..8c65cba1d04
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rng-1.d
@@ -0,0 +1,10 @@
+#source: rng-1.s
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0+ <.*>:
+.*:	d53b2405 	mrs	x5, rndr
+.*:	d53b2426 	mrs	x6, rndrrs
diff --git a/gas/testsuite/gas/aarch64/rng-1.s b/gas/testsuite/gas/aarch64/rng-1.s
new file mode 100644
index 00000000000..3565897b291
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rng-1.s
@@ -0,0 +1,3 @@
+	.arch armv8.4-a+rng
+	mrs x5, rndr
+	mrs x6, rndrrs
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index 4774eba2e54..37f6dae07ad 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -3974,7 +3974,6 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
   SYSREG ((n), (e), (f) | F_ARCHEXT, \
 	  AARCH64_FEATURE_##fe1 | AARCH64_FEATURE_##fe2)
 
-#define SR_RNG(n,e,f)	 SR_FEAT2(n,e,f,RNG,V8_5)
 #define SR_V8_1_A(n,e,f) SR_FEAT2(n,e,f,V8_A,V8_1)
 #define SR_V8_4_A(n,e,f) SR_FEAT2(n,e,f,V8_A,V8_4)
 
@@ -3994,6 +3993,7 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
 #define SR_LOR(n,e,f)	  SR_FEAT (n,e,f,LOR)
 #define SR_PAN(n,e,f)	  SR_FEAT (n,e,f,PAN)
 #define SR_RAS(n,e,f)	  SR_FEAT (n,e,f,RAS)
+#define SR_RNG(n,e,f)	  SR_FEAT (n,e,f,RNG)
 #define SR_SME(n,e,f)	  SR_FEAT (n,e,f,SME)
 #define SR_SSBS(n,e,f)	  SR_FEAT (n,e,f,SSBS)
 #define SR_SVE(n,e,f)	  SR_FEAT (n,e,f,SVE)