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• Caremask

Vl-msb-bits-to-intliteral

Puts a list of bits into a constint or weirdint atom, as appropriate. Assumes the finalwidth should be the length of the bitlist.

Signature

(vl-msb-bits-to-intliteral x type) → lit

Arguments

x — Guard (vl-bitlist-p x).

type — Guard (vl-exprtype-p type).

Returns

lit — Type (vl-expr-p lit).

Definitions and Theorems

Function: vl-msb-bits-to-intliteral

(defun vl-msb-bits-to-intliteral (x type)
  (declare (xargs :guard (and (vl-bitlist-p x)
                              (vl-exprtype-p type))))
  (declare (xargs :guard (consp x)))
  (let ((__function__ 'vl-msb-bits-to-intliteral))
    (declare (ignorable __function__))
    (b* ((x (mbe :logic (if (consp x) x '(:vl-0val))
                 :exec x))
         (natval (vl-msb-bits->maybe-nat-val x 0))
         (type (vl-exprtype-fix type))
         ((when natval)
          (make-vl-atom :guts (make-vl-constint :value natval
                                                :origwidth (len x)
                                                :origtype type
                                                :wasunsized nil)
                        :finalwidth (len x)
                        :finaltype type)))
      (make-vl-atom :guts (make-vl-weirdint :bits x
                                            :origwidth (len x)
                                            :origtype type
                                            :wasunsized nil)
                    :finalwidth (len x)
                    :finaltype type))))

Theorem: vl-expr-p-of-vl-msb-bits-to-intliteral

(defthm vl-expr-p-of-vl-msb-bits-to-intliteral
  (b* ((lit (vl-msb-bits-to-intliteral x type)))
    (vl-expr-p lit))
  :rule-classes :rewrite)

Theorem: vl-expr-welltyped-p-of-vl-msb-bits-to-intliteral

(defthm vl-expr-welltyped-p-of-vl-msb-bits-to-intliteral
  (vl-expr-welltyped-p (vl-msb-bits-to-intliteral x type)))

Theorem: vl-expr->finalwidth-of-vl-msb-bits-to-intliteral

(defthm vl-expr->finalwidth-of-vl-msb-bits-to-intliteral
  (equal (vl-expr->finalwidth (vl-msb-bits-to-intliteral x type))
         (pos-fix (len x))))

Theorem: vl-expr->finaltype-of-vl-msb-bits-to-intliteral

(defthm vl-expr->finaltype-of-vl-msb-bits-to-intliteral
  (equal (vl-expr->finaltype (vl-msb-bits-to-intliteral x type))
         (vl-exprtype-fix type)))

Theorem: vl-msb-bits-to-intliteral-of-vl-bitlist-fix-x

(defthm vl-msb-bits-to-intliteral-of-vl-bitlist-fix-x
  (equal (vl-msb-bits-to-intliteral (vl-bitlist-fix x)
                                    type)
         (vl-msb-bits-to-intliteral x type)))

Theorem: vl-msb-bits-to-intliteral-vl-bitlist-equiv-congruence-on-x

(defthm vl-msb-bits-to-intliteral-vl-bitlist-equiv-congruence-on-x
  (implies (vl-bitlist-equiv x x-equiv)
           (equal (vl-msb-bits-to-intliteral x type)
                  (vl-msb-bits-to-intliteral x-equiv type)))
  :rule-classes :congruence)

Theorem: vl-msb-bits-to-intliteral-of-vl-exprtype-fix-type

(defthm vl-msb-bits-to-intliteral-of-vl-exprtype-fix-type
  (equal (vl-msb-bits-to-intliteral x (vl-exprtype-fix type))
         (vl-msb-bits-to-intliteral x type)))

Theorem: vl-msb-bits-to-intliteral-vl-exprtype-equiv-congruence-on-type

(defthm
     vl-msb-bits-to-intliteral-vl-exprtype-equiv-congruence-on-type
  (implies (vl-exprtype-equiv type type-equiv)
           (equal (vl-msb-bits-to-intliteral x type)
                  (vl-msb-bits-to-intliteral x type-equiv)))
  :rule-classes :congruence)