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-rw-r--r--target/riscv/insn32.decode3
1 files changed, 3 insertions, 0 deletions
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index e9139ec1b9..942c434c6e 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -121,6 +121,9 @@ wfi         0001000    00101 00000 000 00000 1110011
 sfence_vma  0001001    ..... ..... 000 00000 1110011 @sfence_vma
 sfence_vm   0001000    00100 ..... 000 00000 1110011 @sfence_vm
 
+# *** NMI ***
+mnret       0111000    00010 00000 000 00000 1110011
+
 # *** RV32I Base Instruction Set ***
 lui      ....................       ..... 0110111 @u
 {