MRET

Machine Return

MRET

Returns from a machine-mode trap handler.

Encoding

Binary Layout

00110000001000000000000001110011

31:0

 

Format R-Type (System)

Opcode 0x30200073

Extension Privileged

Operands

Related

More in Privileged

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

MRET returns from a machine-level trap. It restores the PC from mepc, restores privilege from the MPP field of mstatus, and updates interrupt-enable and privilege fields in mstatus.

Operation

PC = MEPC; Priv = MPP; MIE = MPIE;