1 files changed, 6 insertions, 0 deletions
diff --git a/riscv/insns/wrs_nto.h b/riscv/insns/wrs_nto.h
new file mode 100644
index 0000000..710e670
--- /dev/null
+++ b/riscv/insns/wrs_nto.h
@@ -0,0 +1,6 @@
+if (get_field(STATE.mstatus->read(), MSTATUS_TW)) {
+  require_privilege(PRV_M);
+} else if (STATE.v) {
+  if (get_field(STATE.hstatus->read(), HSTATUS_VTW))
+    require_novirt();
+}