RISC-V: Add support for the Zvksg ISA extension

Zvksg is part of the vector crypto extensions.

Zvksg is shorthand for the following set of extensions:
- Zvks
- Zvkg

bfd/ChangeLog:

	* elfxx-riscv.c: Define Zvksg extension.

gas/ChangeLog:

	* testsuite/gas/riscv/zvksg.d: New test.
	* testsuite/gas/riscv/zvksg.s: New test.

Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

bfd/elfxx-riscv.c

diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index 5d51ef6..e2a7d8c 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1165,6 +1165,8 @@
   {"zvks", "zvksed",	check_implicit_always},
   {"zvks", "zvksh",	check_implicit_always},
   {"zvks", "zvbb",	check_implicit_always},
+  {"zvksg", "zvks",	check_implicit_always},
+  {"zvksg", "zvkg",	check_implicit_always},
   {"smaia", "ssaia",		check_implicit_always},
   {"smstateen", "ssstateen",	check_implicit_always},
   {"smepmp", "zicsr",		check_implicit_always},
@@ -1282,6 +1284,7 @@
   {"zvksed",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvksh",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvks",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
+  {"zvksg",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvl32b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvl64b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvl128b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },

gas/testsuite/gas/riscv/zvksg.d

diff --git a/gas/testsuite/gas/riscv/zvksg.d b/gas/testsuite/gas/riscv/zvksg.d
new file mode 100644
index 0000000..24a7126
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zvksg.d
@@ -0,0 +1,12 @@
+#as: -march=rv64gc_zvksg
+#objdump: -dr
+
+.*:[ 	]+file format .*
+
+
+Disassembly of section .text:
+0+000 <.text>:
+[ 	]+[0-9a-f]+:[ 	]+86802277[ 	]+vsm4k.vi[ 	]+v4,v8,0
+[ 	]+[0-9a-f]+:[ 	]+ae802277[ 	]+vsm3c.vi[ 	]+v4,v8,0
+[ 	]+[0-9a-f]+:[ 	]+b2862277[ 	]+vghsh.vv[ 	]+v4,v8,v12
+[ 	]+[0-9a-f]+:[ 	]+a2c8a277[ 	]+vgmul.vv[ 	]+v4,v12

gas/testsuite/gas/riscv/zvksg.s

diff --git a/gas/testsuite/gas/riscv/zvksg.s b/gas/testsuite/gas/riscv/zvksg.s
new file mode 100644
index 0000000..8da053e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zvksg.s
@@ -0,0 +1,4 @@
+	vsm4k.vi v4, v8, 0
+	vsm3c.vi v4, v8, 0
+	vghsh.vv v4, v8, v12
+	vgmul.vv v4, v12