1 2 3
sh1add rd rs1 rs2 31..25=16 14..12=2 6..2=0x0C 1..0=3 sh2add rd rs1 rs2 31..25=16 14..12=4 6..2=0x0C 1..0=3 sh3add rd rs1 rs2 31..25=16 14..12=6 6..2=0x0C 1..0=3