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Representation-of-integer-operations

Shr-sshort-sllong

Right shift of a value of type signed short and a value of type signed long long [C:6.5.7].

Definitions and Theorems

Function: shr-sshort-sllong

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

Theorem: sintp-of-shr-sshort-sllong

(defthm sintp-of-shr-sshort-sllong
  (sintp (shr-sshort-sllong x y)))

Theorem: shr-sshort-sllong-of-sshort-fix-x

(defthm shr-sshort-sllong-of-sshort-fix-x
  (equal (shr-sshort-sllong (sshort-fix x) y)
         (shr-sshort-sllong x y)))

Theorem: shr-sshort-sllong-sshort-equiv-congruence-on-x

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

Theorem: shr-sshort-sllong-of-sllong-fix-y

(defthm shr-sshort-sllong-of-sllong-fix-y
  (equal (shr-sshort-sllong x (sllong-fix y))
         (shr-sshort-sllong x y)))

Theorem: shr-sshort-sllong-sllong-equiv-congruence-on-y

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