[PATCH] RISC-V: Ssnpm, smnpm and smmpm imply zicsr.

[Dongyan Chen]

According to the spec[1], imply zicsr for ssnpm, smnpm and smmpm.

[1] https://github.com/riscv/riscv-j-extension/blob/master/zjpm/instructions.adoc

bfd/ChangeLog:

	* elfxx-riscv.c: imply zicsr.

---
 bfd/elfxx-riscv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index 481bac91d73..92e024bbe35 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1266,6 +1266,8 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
   {"smstateen", "+ssstateen", check_implicit_always},
   {"smepmp", "+zicsr", check_implicit_always},
   {"smdbltrp", "+zicsr", check_implicit_always},
+  {"smnpm", "+zicsr", check_implicit_always},
+  {"smmpm", "+zicsr", check_implicit_always},

   {"ssaia", "+zicsr", check_implicit_always},
   {"sscsrind", "+zicsr", check_implicit_always},
@@ -1278,6 +1280,7 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
   {"sstvecd", "+zicsr", check_implicit_always},
   {"ssu64xl", "+zicsr", check_implicit_always},
   {"ssdbltrp", "+zicsr", check_implicit_always},
+  {"ssnpm", "+zicsr", check_implicit_always},

   {"svade", "+zicsr", check_implicit_always},
   {"svadu", "+zicsr", check_implicit_always},
--
2.43.0