I8_32
[I8_32] = { 8, 32, OPERAND_SIGNED },
[INSTR_RIE_RUPI] = { R_8, I8_32, U4_12, J16_16, 0, 0 },
[INSTR_RIS_RURDI] = { R_8, I8_32, U4_12, D_20, B_16, 0 },