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Output Port Renaming Attribute

The Bluespec compiler provides a default name for the output port generated for value methods and ActionValue methods. The attribute result= allows the designer to specify a string for the name of the output port. This is useful when the port names must begin with an upper case letter, which is not a valid method name.

Default Naming

output port name: methodname

Attribute Syntax

(* result= "outputportname" *)
method type methodname (arguments) ;

The string outputportname is the name to be generated for the output port. The result= attribute is ignored if the method is an Action method which does not return a result.

BSV Example

interface GrabAndGive;               
    method Action grab(Bit#(8) value); 
    (*result="OUT" *)
    method Bit#(8) give();            
endinterface

Generated Verilog

 // action method grab
 input  [7 : 0] grab_value;
 input  EN_grab;
 output RDY_grab;
 
 // value method give
 output [7 : 0] OUT;    //output renamed OUT instead of give
 output RDY_give;

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