touchup

beautiful-racket/br/demo/wires/expander.rkt

@@ -24,18 +24,12 @@
           num-or-wire
           (hash-ref! wire-cache num-or-wire num-or-wire)))))
 
-(define (mod-16bit x)
-  (define max-16bit (expt 2 16))
-  (define remainder (modulo x max-16bit))
-  (if (not (negative? remainder))
-      remainder
-      (mod-16bit (+ max-16bit remainder))))
-
+(define 16bit-max (expt 2 16))
 (define-macro (define-16bit ID+ARGS BODY)
-  #'(define ID+ARGS (mod-16bit BODY)))
+  #'(define ID+ARGS (modulo BODY 16bit-max)))
 
-(define-16bit (AND arg1 arg2) (bitwise-and arg1 arg2))
-(define-16bit (OR arg1 arg2) (bitwise-ior arg1 arg2))
-(define-16bit (LSHIFT arg1 arg2) (arithmetic-shift arg1 arg2))
-(define-16bit (RSHIFT arg1 arg2) (arithmetic-shift arg1 (- arg2)))
+(define-16bit (AND x y) (bitwise-and x y))
+(define-16bit (OR x y) (bitwise-ior x y))
+(define-16bit (LSHIFT x y) (arithmetic-shift x y))
+(define-16bit (RSHIFT x y) (LSHIFT x (- y)))
 (define-16bit (NOT arg) (bitwise-not arg))

beautiful-racket/br/demo/wires/main.rkt

@@ -3,8 +3,9 @@
   (provide read-syntax))
 
 (define (read-syntax path port)
-  (define wire-strs (port->lines port))
-  (define wire-datums (format-datums '(wire ~a) wire-strs))
+  (define wire-datums
+    (for/list ([wire-str (in-lines port)])
+              (format-datum '(wire ~a) wire-str)))
   (strip-context
    #`(module wires-mod br/demo/wires/expander
        #,@wire-datums)))