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    • Factorial-cosim

    Check-fact-output

    Signature
    (check-fact-output input halt-address x86) → *
    Arguments
    x86 — Output x86 State.

    Definitions and Theorems

    Function: check-fact-output

    (defun check-fact-output (input halt-address x86)
     (declare (xargs :stobjs (x86)))
     (declare (type (unsigned-byte 50) input)
              (type (signed-byte 48) halt-address))
     (let ((__function__ 'check-fact-output))
      (declare (ignorable __function__))
      (cond
       ((or
          (fault x86)
          (not (equal (ms x86)
                      (cons (cons 'x86-fetch-decode-execute-halt
                                  (cons ':rip (cons halt-address 'nil)))
                            'nil))))
        (cw "~|(ms x86) = ~x0 (fault x86) = ~x1~%"
            (ms x86)
            (fault x86)))
       (t
        (let ((expected (fact input)))
         (cond
          ((and (< input 13)
                (equal (rgfi *rax* x86) expected))
           (prog2$
              (cw "~|(x86isa-fact ~x0) was correctly computed as ~x1.~%"
                  input expected)
              t))
          (t
           (prog2$
            (cw
             "~|(x86isa-fact ~x0) = ~x1, but rax is ~x2,~% ~
                  but that's okay: that's what the program does for input ~x0.~%"
             input expected (rgfi *rax* x86))
            t))))))))