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• Primitives

*vl-1-bit-cmos*

Primitive cmos transistor.

The Verilog meaning of this module is:

module VL_1_BIT_CMOS (out, data, nctrl, pctrl);
  output out ;
  input data ;
  input nctrl ;
  input pctrl ;
  cmos gate (out, data, nctrl, pctrl) ;
endmodule

VL takes this as a primitive. The gate-elim transform converts certain cmos gates into instances of this module.

ESIM has very little support for transistors, but this may be a useful target for other back-end tools. The corresponding esim primitive is ACL2::*esim-cmos*.

Definition: *vl-1-bit-cmos*

(defconst *vl-1-bit-cmos*
 (b*
  ((name "VL_1_BIT_CMOS")
   (atts '(("VL_PRIMITIVE") ("VL_HANDS_OFF")))
   ((mv out-expr
        out-port out-portdecl out-vardecl)
    (vl-primitive-mkport "out" :vl-output))
   ((mv data-expr
        data-port data-portdecl data-vardecl)
    (vl-primitive-mkport "data" :vl-input))
   ((mv nctrl-expr
        nctrl-port nctrl-portdecl nctrl-vardecl)
    (vl-primitive-mkport "nctrl" :vl-input))
   ((mv pctrl-expr
        pctrl-port pctrl-portdecl pctrl-vardecl)
    (vl-primitive-mkport "pctrl" :vl-input))
   (gate
    (make-vl-gateinst :type :vl-cmos
                      :name "gate"
                      :args (list (make-vl-plainarg :expr out-expr
                                                    :dir :vl-output)
                                  (make-vl-plainarg :expr data-expr
                                                    :dir :vl-input)
                                  (make-vl-plainarg :expr nctrl-expr
                                                    :dir :vl-input)
                                  (make-vl-plainarg :expr pctrl-expr
                                                    :dir :vl-input))
                      :loc *vl-fakeloc*)))
  (hons-copy
     (make-vl-module :name name
                     :origname name
                     :ports (list out-port
                                  data-port nctrl-port pctrl-port)
                     :portdecls (list out-portdecl data-portdecl
                                      nctrl-portdecl pctrl-portdecl)
                     :vardecls (list out-vardecl data-vardecl
                                     nctrl-vardecl pctrl-vardecl)
                     :gateinsts (list gate)
                     :minloc *vl-fakeloc*
                     :maxloc *vl-fakeloc*
                     :atts atts
                     :esim acl2::*esim-cmos*))))