		Search-engine friendly clone of the ACL2 documentation.

State-stobj

Read1-pc

Refine read-pc to use the stobj states.

Definitions and Theorems

Function: read1-pc

(defun read1-pc (stat feat)
 (declare (xargs :non-executable t))
 (declare
    (xargs :guard (non-exec (and (stat1p stat)
                                 (statp (stat-from-stat1 stat))
                                 (featp feat)
                                 (stat-validp (stat-from-stat1 stat)
                                              feat)))))
 (prog2$ (acl2::throw-nonexec-error 'read1-pc
                                    (list stat feat))
         (if (acl2::mbt$ (stat1p stat))
             (unsigned-byte-fix (feat->xlen feat)
                                (stat->pc (stat-from-stat1 stat)))
           0)))

Theorem: read1-pc-to-read-pc

(defthm read1-pc-to-read-pc
  (implies (stat1p stat)
           (equal (read1-pc stat feat)
                  (read-pc (stat-from-stat1 stat) feat)))
  :rule-classes :rewrite)

Theorem: read-pc-to-read1-pc

(defthm read-pc-to-read1-pc
  (implies (statp stat)
           (equal (read-pc stat feat)
                  (read1-pc (stat1-from-stat stat) feat)))
  :rule-classes :rewrite)