1mul     rd rs1 rs2 31..25=1 14..12=0 6..2=0x0C 1..0=3
2mulh    rd rs1 rs2 31..25=1 14..12=1 6..2=0x0C 1..0=3
3mulhsu  rd rs1 rs2 31..25=1 14..12=2 6..2=0x0C 1..0=3
4mulhu   rd rs1 rs2 31..25=1 14..12=3 6..2=0x0C 1..0=3
5div     rd rs1 rs2 31..25=1 14..12=4 6..2=0x0C 1..0=3
6divu    rd rs1 rs2 31..25=1 14..12=5 6..2=0x0C 1..0=3
7rem     rd rs1 rs2 31..25=1 14..12=6 6..2=0x0C 1..0=3
8remu    rd rs1 rs2 31..25=1 14..12=7 6..2=0x0C 1..0=3
9