Hello,
If you are just looking for the 32bit opcode for the RV32I instruction sw s0,0(s1)? If so it is the following:0x0084_A023.
The opcode for the compressed version of the sw s0,0(s1) instruction (RV32IC) is as you observed: 0xC080.
I’m not sure i know what you mean by higher or lower bit priority?