| # Environment Call and Breakpoint | |
| ecall | i | | 00000000000000000000000001110011 | |
| ebreak | i | | 00000000000100000000000001110011 | |
| # Trap-Return Instructions | |
| sret | i | | 00010000001000000000000001110011 | |
| mret | i | | 00110000001000000000000001110011 | |
| # Interrupt-Management Instructions | |
| wfi | I | | 00010000010100000000000001110011 | |
| # Supervisor Memory-Management Fence Instruction | |
| sfence.vma | r | rs2 rs1 | 0001001..........000000001110011 |