ISACOV : incorrect passed arguments in get_instr_value_type() method

Created by: AyoubJalali

Hello @JeanRochCoulon @ASintzoff , So I have notice some incorrect argument value in get_instr_value_type(bit[XLEN-1:0] value, int unsigned width, bit is_signed) for some C extension instruction,starting from https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L232 to https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L279 , the problem is in width argument, because the length given don't match with the length of the imm field extract using the get_field_imm() method https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_instr.sv#L374 , but I think it match perfectly with get_data_imm(), so i propose to change the get_field_imm() with get_data_imm() in the ISACOV monitor, or we correct the width values to match with the get_field_imm(). Some of this instruction : https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L234 https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L238 https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L244 https://github.com/openhwgroup/core-v-verif/blob/9962aebe36b339bf88ca7e1d8cb3143e10edbda4/lib/uvm_agents/uvma_isacov/uvma_isacov_mon.sv#L250 ...