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• Vl-echarpack-p

Vl-echarpack

Signature

(vl-echarpack code line col) → *

Arguments

code — Guard (unsigned-byte-p 8 code).

line — Guard (posp line).

col — Guard (natp col).

Definitions and Theorems

Function: vl-echarpack$inline

(defun vl-echarpack$inline (code line col)
 (declare (xargs :guard (and (unsigned-byte-p 8 code)
                             (posp line)
                             (natp col))))
 (declare (type (unsigned-byte 8) code))
 (let ((__function__ 'vl-echarpack))
   (declare (ignorable __function__))
   (if
    (and (< (the (integer 0 *) line) (expt 2 30))
         (< (the (integer 0 *) col) (expt 2 22)))
    (let* ((line-shift (the (unsigned-byte 60)
                            (ash (the (unsigned-byte 30) line) 30)))
           (col-shift (the (unsigned-byte 30)
                           (ash (the (unsigned-byte 22) col) 8))))
      (the (unsigned-byte 60)
           (logior (the (unsigned-byte 60)
                        (logior (the (unsigned-byte 60) line-shift)
                                (the (unsigned-byte 30) col-shift)))
                   (the (unsigned-byte 8) code))))
    (cons (cons line col) code))))

Theorem: vl-echarpack-p-of-vl-echarpack

(defthm vl-echarpack-p-of-vl-echarpack
  (implies (and (force (unsigned-byte-p 8 code))
                (force (posp line))
                (force (natp col)))
           (vl-echarpack-p (vl-echarpack code line col))))