[llvm] d5df500 - [AArch64] Parse "rng" feature flag in .arch directive

[Roland McGrath via llvm-commits]

Author: Roland McGrath
Date: 2021-03-16T14:10:19-07:00
New Revision: d5df500ab83b9d5550fbc03ba4f68a1d8d440af9

URL: https://github.com/llvm/llvm-project/commit/d5df500ab83b9d5550fbc03ba4f68a1d8d440af9
DIFF: https://github.com/llvm/llvm-project/commit/d5df500ab83b9d5550fbc03ba4f68a1d8d440af9.diff

LOG: [AArch64] Parse "rng" feature flag in .arch directive

Reviewed By: phosek

Differential Revision: https://reviews.llvm.org/D98566

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
    llvm/test/MC/AArch64/directive-arch.s

Removed: 
    


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diff  --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 037e24b1b486..e495003e3972 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -2909,6 +2909,7 @@ static const struct Extension {
     {"pan-rwv", {AArch64::FeaturePAN_RWV}},
     {"ccpp", {AArch64::FeatureCCPP}},
     {"rcpc", {AArch64::FeatureRCPC}},
+    {"rng", {AArch64::FeatureRandGen}},
     {"sve", {AArch64::FeatureSVE}},
     {"sve2", {AArch64::FeatureSVE2}},
     {"sve2-aes", {AArch64::FeatureSVE2AES}},

diff  --git a/llvm/test/MC/AArch64/directive-arch.s b/llvm/test/MC/AArch64/directive-arch.s
index 7dfcdb4598f0..2aa2bcbf5665 100644
--- a/llvm/test/MC/AArch64/directive-arch.s
+++ b/llvm/test/MC/AArch64/directive-arch.s
@@ -17,3 +17,9 @@
 	.arch armv8-a+lse
 	casa  w5, w7, [x20]
 # CHECK:        casa    w5, w7, [x20]
+
+	.arch armv8.5-a+rng
+	mrs   x0, rndr
+	mrs   x0, rndrrs
+# CHECK:        mrs     x0, RNDR
+# CHECK:        mrs     x0, RNDRRS