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• Sv::vl-expr.lisp

Vl-bitlist->4vec

Turn a vl-bitlist into a 4vec. Assumes msb-first ordering, such as in a vl-weirdint.

Signature

(vl-bitlist->4vec msb-bits) → val

Arguments

msb-bits — Guard (vl-bitlist-p msb-bits).

Returns

val — Type (sv::4vec-p val).

Definitions and Theorems

Function: vl-bitlist->4vec

(defun vl-bitlist->4vec (msb-bits)
  (declare (xargs :guard (vl-bitlist-p msb-bits)))
  (let ((__function__ 'vl-bitlist->4vec))
    (declare (ignorable __function__))
    (let ((lsb-bits (rev (vl-bitlist-fix msb-bits))))
      (sv::4vec (vl-bitlist->onset lsb-bits)
                (lognot (vl-bitlist->offset lsb-bits))))))

Theorem: 4vec-p-of-vl-bitlist->4vec

(defthm 4vec-p-of-vl-bitlist->4vec
  (b* ((val (vl-bitlist->4vec msb-bits)))
    (sv::4vec-p val))
  :rule-classes :rewrite)

Theorem: vl-bitlist->4vec-of-vl-bitlist-fix-msb-bits

(defthm vl-bitlist->4vec-of-vl-bitlist-fix-msb-bits
  (equal (vl-bitlist->4vec (vl-bitlist-fix msb-bits))
         (vl-bitlist->4vec msb-bits)))

Theorem: vl-bitlist->4vec-vl-bitlist-equiv-congruence-on-msb-bits

(defthm vl-bitlist->4vec-vl-bitlist-equiv-congruence-on-msb-bits
  (implies (vl-bitlist-equiv msb-bits msb-bits-equiv)
           (equal (vl-bitlist->4vec msb-bits)
                  (vl-bitlist->4vec msb-bits-equiv)))
  :rule-classes :congruence)