document additions

Author: snehashri08

riscv_config/checker.py

@@ -388,8 +388,10 @@ def get_fields(node, bitwidth):
 
 
 def check_reset_fill_fields(spec):
+    '''The check_reset_fill_fields function fills the field node with the names of the sub-fields of the register and then checks whether the reset-value of the register is a legal value. To do so, it iterates over all the subfields and extracts the corresponding field value from the reset-value. Then it checks the legality of the value according to the given field description. If the fields is implemented i.e accessible in both 64 bit and 32 bit modes, the 64 bit mode is given preference. '''
     errors = {}
     for node in spec:
+       
         if isinstance(spec[node], dict):
             if spec[node]['rv32']['accessible']:
                 spec[node]['rv32']['fields'] = get_fields(