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; Copyright (c) 1993-2008 by Richard Kelsey. See file COPYING.
(define-local-syntax (define-primitive id nargs)
(let ((args (reverse (list-tail '(z y x) (- '3 nargs)))))
`(define (,id . ,args)
(call-primitively ,id . ,args))))
(define-primitive + 2)
(define-primitive - 2)
(define-primitive * 2)
(define-primitive < 2)
(define-primitive make-vector 2)
(define-primitive pointer-add 2)
(define (vector-ref vec index)
(call-primitively contents (pointer-add vec index)))
(define (vector-set! vec index value)
(call-primitively set-contents! (pointer-add vec index) value))
(define (cons x y)
(let ((p (make-vector 2 0)))
(vector-set! p 0 x)
(vector-set! p 1 y)
p))
(define (car p)
(vector-ref p 0))
(define (cdr p)
(vector-ref p 1))
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