* [PATCH] aarch64: Relax check for RNG system registers
@ 2022-03-31 9:43 Richard Sandiford
2022-03-31 14:50 ` Nick Clifton
0 siblings, 1 reply; 2+ messages in thread
From: Richard Sandiford @ 2022-03-31 9:43 UTC (permalink / raw)
To: binutils; +Cc: richard.earnshaw
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.
Tested on aarch64-linux-gnu. OK to install?
Richard
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.
---
gas/testsuite/gas/aarch64/rng-1.d | 10 ++++++++++
gas/testsuite/gas/aarch64/rng-1.s | 3 +++
opcodes/aarch64-opc.c | 2 +-
3 files changed, 14 insertions(+), 1 deletion(-)
create mode 100644 gas/testsuite/gas/aarch64/rng-1.d
create mode 100644 gas/testsuite/gas/aarch64/rng-1.s
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..72cf81936c8 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)
--
2.25.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] aarch64: Relax check for RNG system registers
2022-03-31 9:43 [PATCH] aarch64: Relax check for RNG system registers Richard Sandiford
@ 2022-03-31 14:50 ` Nick Clifton
0 siblings, 0 replies; 2+ messages in thread
From: Nick Clifton @ 2022-03-31 14:50 UTC (permalink / raw)
To: binutils, richard.earnshaw, richard.sandiford
Hi Richard,
> Tested on aarch64-linux-gnu. OK to install?
Go ahead - make my day. Ahem, I mean, patch approved, please apply.
Cheers
Nick
^ permalink raw reply [flat|nested] 2+ messages in thread
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