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• Oprewrite

Vl-op-oprewrite

Main operator rewriting function.

Signature

(vl-op-oprewrite op args atts warnings) → (mv warnings expr)

Arguments

op — Some operator.
    Guard (vl-op-p op).

args — The arguments to the operator (already rewritten).
    Guard (vl-exprlist-p args).

atts — The attributes for the operator.
    Guard (vl-atts-p atts).

warnings — Ordinary warnings accumulator.
    Guard (vl-warninglist-p warnings).

Returns

warnings — Type (vl-warninglist-p warnings).

expr — Possibly simplified, rewritten version of op(args).
    Type (vl-expr-p expr).

Keeping this function separate from vl-expr-oprewrite helps to keep the mutual recursion as simple as possible.

Definitions and Theorems

Function: vl-op-oprewrite

(defun vl-op-oprewrite (op args atts warnings)
 (declare (xargs :guard (and (vl-op-p op)
                             (vl-exprlist-p args)
                             (vl-atts-p atts)
                             (vl-warninglist-p warnings))))
 (declare (xargs :guard (or (not (vl-op-arity op))
                            (equal (len args) (vl-op-arity op)))))
 (let ((__function__ 'vl-op-oprewrite))
  (declare (ignorable __function__))
  (case
   (vl-op-fix op)
   (:vl-qmark
    (b* (((list a b c) args)
         (or-a (make-vl-nonatom
                    :op :vl-unary-bitor
                    :args (list a)
                    :atts (acons "VL_CONDITIONAL_FIX" nil atts))))
      (if
       (vl-zatom-p b)
       (let
         ((nor-a (make-vl-nonatom
                      :op :vl-unary-bitnot
                      :args (list or-a)
                      :atts (acons "VL_CONDITIONAL_FIX" nil atts))))
         (mv (ok)
             (make-vl-nonatom :op :vl-qmark
                              :atts atts
                              :args (list nor-a c b))))
       (mv (ok)
           (make-vl-nonatom :op :vl-qmark
                            :atts atts
                            :args (list or-a b c))))))
   (:vl-binary-logand
        (b* (((list a b) args)
             (or-a (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list a)))
             (or-b (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list b)))
             (result (make-vl-nonatom :op :vl-binary-bitand
                                      :atts atts
                                      :args (list or-a or-b))))
          (mv (ok) result)))
   (:vl-binary-logor
        (b* (((list a b) args)
             (or-a (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list a)))
             (or-b (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list b)))
             (result (make-vl-nonatom :op :vl-binary-bitor
                                      :atts atts
                                      :args (list or-a or-b))))
          (mv (ok) result)))
   (:vl-unary-plus
    (b*
     (((list a) args)
      (|1'sb0|
       (make-vl-atom :guts (make-vl-constint :value 0
                                             :origwidth 1
                                             :origtype :vl-signed)))
      (result (make-vl-nonatom :op :vl-binary-plus
                               :atts atts
                               :args (list a |1'sb0|))))
     (mv (ok) result)))
   (:vl-unary-minus
    (b*
     (((list a) args)
      (|1'sb0|
       (make-vl-atom :guts (make-vl-constint :value 0
                                             :origwidth 1
                                             :origtype :vl-signed)))
      (result (make-vl-nonatom :op :vl-binary-minus
                               :atts atts
                               :args (list |1'sb0| a))))
     (mv (ok) result)))
   (:vl-unary-lognot
        (b* (((list a) args)
             (or-a (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list a)))
             (~or-a (make-vl-nonatom :op :vl-unary-bitnot
                                     :args (list or-a)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~or-a))))
          (mv (ok) result)))
   (:vl-unary-nand
        (b* (((list a) args)
             (and-a (make-vl-nonatom :op :vl-unary-bitand
                                     :args (list a)))
             (~and-a (make-vl-nonatom :op :vl-unary-bitnot
                                      :args (list and-a)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~and-a))))
          (mv (ok) result)))
   (:vl-unary-nor
        (b* (((list a) args)
             (or-a (make-vl-nonatom :op :vl-unary-bitor
                                    :args (list a)))
             (~or-a (make-vl-nonatom :op :vl-unary-bitnot
                                     :args (list or-a)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~or-a))))
          (mv (ok) result)))
   (:vl-unary-xnor (b* (((list a) args)
                        (^a (make-vl-nonatom :op :vl-unary-xor
                                             :args (list a)))
                        (~^a (make-vl-nonatom :op :vl-unary-bitnot
                                              :args (list ^a)))
                        (result (make-vl-nonatom :op :vl-concat
                                                 :atts atts
                                                 :args (list ~^a))))
                     (mv (ok) result)))
   ((:vl-binary-eq)
    (b* (((list a b) args)
         (a~^b (make-vl-nonatom :op :vl-binary-xnor
                                :args (list a b)))
         (result (make-vl-nonatom :op :vl-unary-bitand
                                  :atts atts
                                  :args (list a~^b))))
      (mv (ok) result)))
   ((:vl-binary-neq)
    (b* (((list a b) args)
         (a^b (make-vl-nonatom :op :vl-binary-xor
                               :args (list a b)))
         (result (make-vl-nonatom :op :vl-unary-bitor
                                  :atts atts
                                  :args (list a^b))))
      (mv (ok) result)))
   (:vl-binary-cne
        (b* (((list a b) args)
             (a===b (make-vl-nonatom :op :vl-binary-ceq
                                     :args (list a b)))
             (~a===b (make-vl-nonatom :op :vl-unary-bitnot
                                      :args (list a===b)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~a===b))))
          (mv (ok) result)))
   (:vl-binary-lt
        (b* (((list a b) args)
             (a>=b (make-vl-nonatom :op :vl-binary-gte
                                    :args (list a b)))
             (~a>=b (make-vl-nonatom :op :vl-unary-bitnot
                                     :args (list a>=b)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~a>=b))))
          (mv (ok) result)))
   (:vl-binary-gt
        (b* (((list a b) args)
             (b>=a (make-vl-nonatom :op :vl-binary-gte
                                    :args (list b a)))
             (~b>=a (make-vl-nonatom :op :vl-unary-bitnot
                                     :args (list b>=a)))
             (result (make-vl-nonatom :op :vl-concat
                                      :atts atts
                                      :args (list ~b>=a))))
          (mv (ok) result)))
   (:vl-binary-lte (b* (((list a b) args)
                        (result (make-vl-nonatom :op :vl-binary-gte
                                                 :atts atts
                                                 :args (list b a))))
                     (mv (ok) result)))
   (:vl-multiconcat
        (let ((result (vl-maybe-consolidate-multiconcat
                           (make-vl-nonatom :op :vl-multiconcat
                                            :args args
                                            :atts atts))))
          (mv (ok) result)))
   (otherwise (mv (ok)
                  (make-vl-nonatom :op op
                                   :args args
                                   :atts atts))))))

Theorem: vl-warninglist-p-of-vl-op-oprewrite.warnings

(defthm vl-warninglist-p-of-vl-op-oprewrite.warnings
  (b* (((mv ?warnings ?expr)
        (vl-op-oprewrite op args atts warnings)))
    (vl-warninglist-p warnings))
  :rule-classes :rewrite)

Theorem: vl-expr-p-of-vl-op-oprewrite.expr

(defthm vl-expr-p-of-vl-op-oprewrite.expr
  (b* (((mv ?warnings ?expr)
        (vl-op-oprewrite op args atts warnings)))
    (vl-expr-p expr))
  :rule-classes :rewrite)

Theorem: vl-op-oprewrite-of-vl-op-fix-op

(defthm vl-op-oprewrite-of-vl-op-fix-op
  (equal (vl-op-oprewrite (vl-op-fix op)
                          args atts warnings)
         (vl-op-oprewrite op args atts warnings)))

Theorem: vl-op-oprewrite-vl-op-equiv-congruence-on-op

(defthm vl-op-oprewrite-vl-op-equiv-congruence-on-op
  (implies (vl-op-equiv op op-equiv)
           (equal (vl-op-oprewrite op args atts warnings)
                  (vl-op-oprewrite op-equiv args atts warnings)))
  :rule-classes :congruence)

Theorem: vl-op-oprewrite-of-vl-exprlist-fix-args

(defthm vl-op-oprewrite-of-vl-exprlist-fix-args
  (equal (vl-op-oprewrite op (vl-exprlist-fix args)
                          atts warnings)
         (vl-op-oprewrite op args atts warnings)))

Theorem: vl-op-oprewrite-vl-exprlist-equiv-congruence-on-args

(defthm vl-op-oprewrite-vl-exprlist-equiv-congruence-on-args
  (implies (vl-exprlist-equiv args args-equiv)
           (equal (vl-op-oprewrite op args atts warnings)
                  (vl-op-oprewrite op args-equiv atts warnings)))
  :rule-classes :congruence)

Theorem: vl-op-oprewrite-of-vl-atts-fix-atts

(defthm vl-op-oprewrite-of-vl-atts-fix-atts
  (equal (vl-op-oprewrite op args (vl-atts-fix atts)
                          warnings)
         (vl-op-oprewrite op args atts warnings)))

Theorem: vl-op-oprewrite-vl-atts-equiv-congruence-on-atts

(defthm vl-op-oprewrite-vl-atts-equiv-congruence-on-atts
  (implies (vl-atts-equiv atts atts-equiv)
           (equal (vl-op-oprewrite op args atts warnings)
                  (vl-op-oprewrite op args atts-equiv warnings)))
  :rule-classes :congruence)

Theorem: vl-op-oprewrite-of-vl-warninglist-fix-warnings

(defthm vl-op-oprewrite-of-vl-warninglist-fix-warnings
  (equal (vl-op-oprewrite op
                          args atts (vl-warninglist-fix warnings))
         (vl-op-oprewrite op args atts warnings)))

Theorem: vl-op-oprewrite-vl-warninglist-equiv-congruence-on-warnings

(defthm vl-op-oprewrite-vl-warninglist-equiv-congruence-on-warnings
  (implies (vl-warninglist-equiv warnings warnings-equiv)
           (equal (vl-op-oprewrite op args atts warnings)
                  (vl-op-oprewrite op args atts warnings-equiv)))
  :rule-classes :congruence)