1# SYSTEM
2ecall     11..7=0 19..15=0 31..20=0x000 14..12=0 6..2=0x1C 1..0=3
3ebreak    11..7=0 19..15=0 31..20=0x001 14..12=0 6..2=0x1C 1..0=3
4sret      11..7=0 19..15=0 31..20=0x102 14..12=0 6..2=0x1C 1..0=3
5mret      11..7=0 19..15=0 31..20=0x302 14..12=0 6..2=0x1C 1..0=3
6dret      11..7=0 19..15=0 31..20=0x7b2 14..12=0 6..2=0x1C 1..0=3
7sfence.vma 11..7=0 rs1 rs2 31..25=0x09  14..12=0 6..2=0x1C 1..0=3
8wfi       11..7=0 19..15=0 31..20=0x105 14..12=0 6..2=0x1C 1..0=3
9csrrw     rd      rs1      imm12        14..12=1 6..2=0x1C 1..0=3
10csrrs     rd      rs1      imm12        14..12=2 6..2=0x1C 1..0=3
11csrrc     rd      rs1      imm12        14..12=3 6..2=0x1C 1..0=3
12csrrwi    rd      rs1      imm12        14..12=5 6..2=0x1C 1..0=3
13csrrsi    rd      rs1      imm12        14..12=6 6..2=0x1C 1..0=3
14csrrci    rd      rs1      imm12        14..12=7 6..2=0x1C 1..0=3
15