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Opcode

Opcode->op

Get the op field from a opcode.

Signature
(opcode->op x) → op
Arguments: x — Guard (opcode-p x).
Returns: op — Type (24bits-p op).

This is an ordinary field accessor created by defprod.

Definitions and Theorems

Function: opcode->op$inline

(defun opcode->op$inline (x)
 (declare (xargs :guard (opcode-p x)))
 (declare (xargs :guard t))
 (let ((__function__ 'opcode->op))
  (declare (ignorable __function__))
  (mbe
   :logic
   (b* ((x (and t x)))
     (24bits-fix (std::prod-car (std::prod-car (std::prod-car x)))))
   :exec (std::prod-car (std::prod-car (std::prod-car x))))))

Theorem: 24bits-p-of-opcode->op

(defthm 24bits-p-of-opcode->op
  (b* ((op (opcode->op$inline x)))
    (24bits-p op))
  :rule-classes :rewrite)

Theorem: opcode->op$inline-of-opcode-fix-x

(defthm opcode->op$inline-of-opcode-fix-x
  (equal (opcode->op$inline (opcode-fix x))
         (opcode->op$inline x)))

Theorem: opcode->op$inline-opcode-equiv-congruence-on-x

(defthm opcode->op$inline-opcode-equiv-congruence-on-x
  (implies (opcode-equiv x x-equiv)
           (equal (opcode->op$inline x)
                  (opcode->op$inline x-equiv)))
  :rule-classes :congruence)