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• Sv::vl-expr.lisp

Vl-datatype-index-is-bitselect

Signature

(vl-datatype-index-is-bitselect x) → *

Arguments

x — Guard (vl-datatype-p x).

Definitions and Theorems

Function: vl-datatype-index-is-bitselect

(defun vl-datatype-index-is-bitselect (x)
  (declare (xargs :guard (vl-datatype-p x)))
  (declare (xargs :guard (vl-datatype-resolved-p x)))
  (let ((__function__ 'vl-datatype-index-is-bitselect))
    (declare (ignorable __function__))
    (b* ((x (vl-maybe-usertype-resolve x))
         (udims (vl-datatype->udims x))
         (pdims (vl-datatype->pdims x))
         ((when (consp udims)) nil)
         ((when (atom pdims))
          (vl-datatype-packedp x))
         (x-minus-1d (vl-datatype-update-pdims (cdr pdims)
                                               x))
         (x-minus-1d (vl-maybe-usertype-resolve x-minus-1d)))
      (and (atom (vl-datatype->pdims x-minus-1d))
           (atom (vl-datatype->udims x-minus-1d))
           (vl-datatype-case
                x-minus-1d :vl-coretype
                (b* (((vl-coredatatype-info xinfo)
                      (vl-coretypename->info x-minus-1d.name)))
                  (eql xinfo.size 1))
                :otherwise nil)))))

Theorem: vl-datatype-index-is-bitselect-of-vl-datatype-fix-x

(defthm vl-datatype-index-is-bitselect-of-vl-datatype-fix-x
  (equal (vl-datatype-index-is-bitselect (vl-datatype-fix x))
         (vl-datatype-index-is-bitselect x)))

Theorem: vl-datatype-index-is-bitselect-vl-datatype-equiv-congruence-on-x

(defthm
   vl-datatype-index-is-bitselect-vl-datatype-equiv-congruence-on-x
  (implies (vl-datatype-equiv x x-equiv)
           (equal (vl-datatype-index-is-bitselect x)
                  (vl-datatype-index-is-bitselect x-equiv)))
  :rule-classes :congruence)