Implements svex-argmasks for
(svmask-for-==? mask args) → argmasks
We just reuse the argmasks for
Function:
(defun svmask-for-==? (mask args) (declare (xargs :guard (and (4vmask-p mask) (svexlist-p args)))) (let ((__function__ 'svmask-for-==?)) (declare (ignorable __function__)) (b* (((svex-nths a b) args) (mask (4vmask-fix mask))) (b* (((when (sparseint-equal mask 0)) (list 0 0)) ((s4vec bval) (svex-s4xeval b)) (b-nonz (sparseint-bitorc2 bval.upper bval.lower))) (list b-nonz -1)))))
Theorem:
(defthm 4vmasklist-p-of-svmask-for-==? (b* ((argmasks (svmask-for-==? mask args))) (4vmasklist-p argmasks)) :rule-classes :rewrite)
Theorem:
(defthm svmask-for-==?-of-4vmask-fix-mask (equal (svmask-for-==? (4vmask-fix mask) args) (svmask-for-==? mask args)))
Theorem:
(defthm svmask-for-==?-4vmask-equiv-congruence-on-mask (implies (4vmask-equiv mask mask-equiv) (equal (svmask-for-==? mask args) (svmask-for-==? mask-equiv args))) :rule-classes :congruence)
Theorem:
(defthm svmask-for-==?-of-svexlist-fix-args (equal (svmask-for-==? mask (svexlist-fix args)) (svmask-for-==? mask args)))
Theorem:
(defthm svmask-for-==?-svexlist-equiv-congruence-on-args (implies (svexlist-equiv args args-equiv) (equal (svmask-for-==? mask args) (svmask-for-==? mask args-equiv))) :rule-classes :congruence)
Theorem:
(defthm svmask-for-==?-correct (implies (and (equal (4veclist-mask (svmask-for-==? mask args) (svexlist-eval args env)) (4veclist-mask (svmask-for-==? mask args) args1)) (syntaxp (not (equal args1 (cons 'svexlist-eval (cons args (cons env 'nil))))))) (equal (4vec-mask mask (svex-apply '==? args1)) (4vec-mask mask (svex-apply '==? (svexlist-eval args env))))))