(b[PARAM1 : PARAM2] == c)
It takes the vector slice consisting of bits 2 down to 1 of element 'b' and compares it to 'c'.
With == being a Boolean operator - the result is either '0' or '1'.
&& performs a logical AND with 'd.var' and assigns the result to 'a'.
(b[PARAM1 : PARAM2] == c)
It takes the vector slice consisting of bits 2 down to 1 of element 'b' and compares it to 'c'.
With == being a Boolean operator - the result is either '0' or '1'.
&& performs a logical AND with 'd.var' and assigns the result to 'a'.
if you under stand HDLs then b[2:1] is compared to c whose output will be either 1 or 0. Logical AND the result with d.var and then store the result into A.