[RFC PATCH v3 5/8] RISC-V: Add Zvkn ISA extension support

[Christoph Muellner <christoph.muellner@vrull.eu>]

From: Christoph Müllner <christoph.muellner@vrull.eu>

This commit adds support for the Zvkn ISA extension,
which is part of the vector crypto extensions.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
---
 bfd/elfxx-riscv.c              |  4 ++++
 gas/testsuite/gas/riscv/zvkn.d | 10 ++++++++++
 gas/testsuite/gas/riscv/zvkn.s |  2 ++
 3 files changed, 16 insertions(+)
 create mode 100644 gas/testsuite/gas/riscv/zvkn.d
 create mode 100644 gas/testsuite/gas/riscv/zvkn.s

diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index c0a71c771fc..88846bcf807 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1101,6 +1101,9 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
   {"zks", "zbkx",	check_implicit_always},
   {"zks", "zksed",	check_implicit_always},
   {"zks", "zksh",	check_implicit_always},
+  {"zvkn", "zvkned",	check_implicit_always},
+  {"zvkn", "zvknha",	check_implicit_always},
+  {"zvkn", "zvknhb",	check_implicit_always},
   {"smaia", "ssaia",		check_implicit_always},
   {"smstateen", "ssstateen",	check_implicit_always},
   {"smepmp", "zicsr",		check_implicit_always},
@@ -1207,6 +1210,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
   {"zve64d",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvkb",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvkg",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
+  {"zvkn",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvkned",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvknha",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvknhb",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
diff --git a/gas/testsuite/gas/riscv/zvkn.d b/gas/testsuite/gas/riscv/zvkn.d
new file mode 100644
index 00000000000..d6be3bd671b
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zvkn.d
@@ -0,0 +1,10 @@
+#as: -march=rv64gc_zvkn
+#objdump: -dr
+
+.*:[ 	]+file format .*
+
+
+Disassembly of section .text:
+0+000 <.text>:
+[ 	]+[0-9a-f]+:[ 	]+a280a277[ 	]+vaesdf.vv[ 	]+v4,v8
+[ 	]+[0-9a-f]+:[ 	]+ba862277[ 	]+vsha2ch.vv[ 	]+v4,v8,v12
diff --git a/gas/testsuite/gas/riscv/zvkn.s b/gas/testsuite/gas/riscv/zvkn.s
new file mode 100644
index 00000000000..f7516e075e0
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zvkn.s
@@ -0,0 +1,2 @@
+	vaesdf.vv v4, v8
+	vsha2ch.vv v4, v8, v12
-- 
2.39.1