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49 lines
1.2 KiB
Racket
49 lines
1.2 KiB
Racket
#lang br/quicklang
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(module+ reader
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(provide read-syntax))
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(define (read-syntax path port)
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(define wire-datums
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(for/list ([wire-str (in-lines port)])
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(format-datum '(wire ~a) wire-str)))
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(strip-bindings
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#`(module wires-mod wires-demo/main
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#,@wire-datums)))
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(provide #%module-begin)
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(define-macro-cases wire
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[(wire ARG -> ID)
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#'(define/display (ID) (val ARG))]
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[(wire OP ARG -> ID)
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#'(wire (OP (val ARG)) -> ID)]
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[(wire ARG1 OP ARG2 -> ID)
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#'(wire (OP (val ARG1) (val ARG2)) -> ID)]
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[else #'(void)])
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(provide wire)
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(define-macro (define/display (ID) BODY)
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#'(begin
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(define (ID) BODY)
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(module+ main
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(displayln (format "~a: ~a" 'ID (ID))))))
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(define val
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(let ([val-cache (make-hash)])
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(lambda (num-or-wire)
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(if (number? num-or-wire)
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num-or-wire
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(hash-ref! val-cache num-or-wire num-or-wire)))))
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(define (mod-16bit x) (modulo x 65536))
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(define-macro (define-16bit ID PROC-ID)
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#'(define ID (compose1 mod-16bit PROC-ID)))
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(define-16bit AND bitwise-and)
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(define-16bit OR bitwise-ior)
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(define-16bit NOT bitwise-not)
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(define-16bit LSHIFT arithmetic-shift)
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(define (RSHIFT x y) (LSHIFT x (- y)))
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(provide AND OR NOT LSHIFT RSHIFT)
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