Simple ALU Implementation
I have to implement a simple ALU of a 32bit mips..I have already implemented many submodules (adder,multipliers,shifter...) ,that I have to instantiate in the top level module "ALU_TOP". This module receives as input 2 op. (a , b) and a 6bit signal OPCODE on which basis the differents modules are instantiates.
My problem is checking the signal OPCODE directly in the architecture (not in a process , and after begin of arch.). I used that solution because using a process returned me errors reusing the components (and portamaps...)
But now I cannot even check the OPCODE ("If not allowed..")..(I double checked parenthesis or typos..)...
what should I do? Do I have to use a process? But how to use different modules within a process?
I paste the simple part of the code .. and this not work..
Thanks in advance
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