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Representation-of-integer-operations

Shr-uint-sllong-okp

Check if the right shift of a value of type unsigned int by a value of type signed long long is well-defined.

Definitions and Theorems

Function: shr-uint-sllong-okp

(defun shr-uint-sllong-okp (x y)
  (declare (xargs :guard (and (uintp x) (sllongp y))))
  (shr-uint-okp x (integer-from-sllong y)))

Theorem: booleanp-of-shr-uint-sllong-okp

(defthm booleanp-of-shr-uint-sllong-okp
  (booleanp (shr-uint-sllong-okp x y)))

Theorem: shr-uint-sllong-okp-of-uint-fix-x

(defthm shr-uint-sllong-okp-of-uint-fix-x
  (equal (shr-uint-sllong-okp (uint-fix x) y)
         (shr-uint-sllong-okp x y)))

Theorem: shr-uint-sllong-okp-uint-equiv-congruence-on-x

(defthm shr-uint-sllong-okp-uint-equiv-congruence-on-x
  (implies (uint-equiv x x-equiv)
           (equal (shr-uint-sllong-okp x y)
                  (shr-uint-sllong-okp x-equiv y)))
  :rule-classes :congruence)

Theorem: shr-uint-sllong-okp-of-sllong-fix-y

(defthm shr-uint-sllong-okp-of-sllong-fix-y
  (equal (shr-uint-sllong-okp x (sllong-fix y))
         (shr-uint-sllong-okp x y)))

Theorem: shr-uint-sllong-okp-sllong-equiv-congruence-on-y

(defthm shr-uint-sllong-okp-sllong-equiv-congruence-on-y
  (implies (sllong-equiv y y-equiv)
           (equal (shr-uint-sllong-okp x y)
                  (shr-uint-sllong-okp x y-equiv)))
  :rule-classes :congruence)