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Pop-x86-oracle-logic

Signature

(pop-x86-oracle-logic x86) → (mv * x86)

Definitions and Theorems

Function: pop-x86-oracle-logic

(defun pop-x86-oracle-logic (x86)
 (declare (xargs :stobjs (x86)))
 (declare (xargs :guard t))
 (let ((__function__ 'pop-x86-oracle-logic))
  (declare (ignorable __function__))
  (b*
   ((rip (rip x86))
    (env (env-read x86))
    (oracle (cdr (assoc-equal :oracle env)))
    (vals (assoc-equal rip oracle))
    (lst (if (consp vals)
             (if (consp (cdr vals)) (cdr vals) nil)
           nil))
    ((mv val x86)
     (if (atom lst)
         (let ((x86 (!ms (list :syscall-oracle-pop-empty rip)
                         x86)))
           (mv -1 x86))
      (let
       ((x86
         (env-write
           (acons
                ':file-descriptors
                (cdr (assoc-equal :file-descriptors env))
                (acons ':file-contents
                       (cdr (assoc-equal :file-contents env))
                       (acons ':oracle
                              (put-assoc-equal rip (cdr lst) oracle)
                              nil)))
           x86)))
       (mv (car lst) x86)))))
   (mv val x86))))