rv_insn_reg_get_val
if (!rv_insn_reg_get_val(regs, RV_EXTRACT_RS1_REG(opcode), &rs1_val) ||
!rv_insn_reg_get_val(regs, RV_EXTRACT_RS2_REG(opcode), &rs2_val))
if (!rv_insn_reg_get_val(regs, rs1, &jump_addr))
if (!rv_insn_reg_get_val(regs, rs1, &rs1_val))
ret = rv_insn_reg_get_val(regs, rs1_index, &base_addr);