- ((i 'set-from! j n)
- ((norm-ref core-vec i) 'set-from! (norm-ref core-vec j))
- (norm-set! names-vec i n)
- (run-set-functions i n))
- ((i 'set-from-instr! instr n)
- ((norm-ref core-vec i) 'set-from! instr)
- (norm-set! names-vec i n)
- (run-set-functions i n))
- ((i 'set! v x n)
- ((norm-ref core-vec i) 'set! v x)
- (norm-set! names-vec i n)
- (run-set-functions i n))
- ((i 'name) (norm-ref names-vec i))
- (((? integer? i) v) ((norm-ref core-vec i) v))
- (('->addr (? integer? i)) (norm-addr i))
- (('dump)
- (let loop ((i 0))
- (unless (>= i core-size)
- (print* i ":\t" ((vector-ref core-vec i) '->string))
- (let ((n (vector-ref names-vec i)))
- (unless (null? n)
- (print* "\t;" n)))
- (print)
- (loop (+ i 1)))))
- (('size) core-size)))))
-
-
-;;; Programmes and task queues
-;;
-
-(define (make-prog name instrs offset)
- (list name instrs offset))
-
-(define (prog-name prog) (list-ref prog 0))
-(define (prog-instrs prog) (list-ref prog 1))
-(define (prog-offset prog) (list-ref prog 2))
-
-(define (install-prog core prog addr)
- (let loop ((ptr addr)
- (instrs (prog-instrs prog)))
- (unless (null? instrs)
- (core ptr 'set-from-instr! (car instrs) (prog-name prog))
- (loop (core '->addr (+ ptr 1)) (cdr instrs))))
- (make-queue (prog-name prog)
- (core '->addr (+ addr (prog-offset prog)))))
-
-(define (can-install-prog? core prog-len addr)
- (let loop ((ptr addr)
- (remaining prog-len))
- (if (= remaining 0)
- #t
- (if (null? (core ptr 'name))
- (loop (core '->addr (+ ptr 1))
- (- remaining 1))
- #f))))
-
-(define (install-progs core progs)
- (let loop ((queues '())
- (progs-left progs))
- (if (null? progs-left)
+ (('opcode) opcode)
+ (('modifier) modifier)
+ (('A-mode) A-mode)
+ (('A-num) A-num)
+ (('B-mode) B-mode)
+ (('B-num) B-num)
+ (('make-copy) (make-instr opcode modifier A-mode A-num B-mode B-num))
+ (('set! 'opcode x) (set! opcode x))
+ (('set! 'modifier x) (set! modifier x))
+ (('set! 'A-mode x) (set! A-mode x))
+ (('set! 'A-num x) (set! A-num x))
+ (('set! 'B-mode x) (set! B-mode x))
+ (('set! 'B-num x) (set! B-num x))
+ (('set-from! other)
+ (set! opcode (other 'opcode))
+ (set! modifier (other 'modifier))
+ (set! A-mode (other 'A-mode))
+ (set! A-num (other 'A-num))
+ (set! B-mode (other 'B-mode))
+ (set! B-num (other 'B-num)))
+ (('->string)
+ (conc opcode
+ "." modifier
+ "\t" (mode->string A-mode) A-num
+ ", " (mode->string B-mode) B-num))
+ (else
+ (error "Invalid instr arguments" args)))))
+
+ (define (mode->string mode)
+ (case mode
+ ((immediate) "#")
+ ((direct) "$")
+ ((indirect-A) "*")
+ ((indirect-B) "@")
+ ((pre-indirect-A) "{")
+ ((pre-indirect-B) "<")
+ ((post-indirect-A) "}")
+ ((post-indirect-B) ">")
+ (else
+ (error "Unknown mode."))))
+
+
+ ;;; Memory setup and addressing
+ ;;
+
+ (define (make-core core-size initial-instr . set-functions)
+ (let ((core-vec (make-vector core-size '()))
+ (names-vec (make-vector core-size '())))
+ (define (norm-addr i)
+ (if (< i 0)
+ (norm-addr (+ i core-size))
+ (modulo i core-size)))
+ (define (norm-ref v i)
+ (vector-ref v (norm-addr i)))
+ (define (norm-set! v i x)
+ (vector-set! v (norm-addr i)
+ (if (integer? x)
+ (norm-addr x)
+ x)))
+ (define (run-set-functions i n)
+ (let loop ((remaining-fns set-functions))
+ (unless (null? remaining-fns)
+ ((car remaining-fns) i n))))
+ (define (dump i)
+ (print* i ":\t" ((norm-ref core-vec i) '->string))
+ (let ((n (norm-ref names-vec i)))
+ (unless (null? n)
+ (print* "\t;" n)))
+ (print))
+ (let loop ((i 0))
+ (unless (>= i core-size)
+ (vector-set! core-vec i (initial-instr 'make-copy))
+ (loop (+ i 1))))
+ (lambda args
+ (match args
+ ((i 'set-from! j n)
+ ((norm-ref core-vec i) 'set-from! (norm-ref core-vec j))
+ (norm-set! names-vec i n)
+ (run-set-functions i n))
+ ((i 'set-from-instr! instr n)
+ ((norm-ref core-vec i) 'set-from! instr)
+ (norm-set! names-vec i n)
+ (run-set-functions i n))
+ ((i 'set! v x n)
+ ((norm-ref core-vec i) 'set! v x)
+ (norm-set! names-vec i n)
+ (run-set-functions i n))
+ ((i 'name) (norm-ref names-vec i))
+ (((? integer? i) v) ((norm-ref core-vec i) v))
+ (('->addr (? integer? i)) (norm-addr i))
+ (('dump i)
+ (let ((i1 (- i 4))
+ (i2 (+ i 4)))
+ (let loop ((idx i1))
+ (unless (> idx i2)
+ (if (= idx i)
+ (print* "*"))
+ (dump idx)
+ (loop (+ idx 1))))))
+ (('size) core-size)))))
+
+
+ ;;; Programmes and task queues
+ ;;
+
+ (define (make-prog name author instrs offset)
+ (list name author instrs offset))
+
+ (define (prog-name prog) (list-ref prog 0))
+ (define (prog-author prog) (list-ref prog 1))
+ (define (prog-instrs prog) (list-ref prog 2))
+ (define (prog-offset prog) (list-ref prog 3))
+
+ (define (install-prog core prog addr)
+ (let loop ((ptr addr)
+ (instrs (prog-instrs prog)))
+ (unless (null? instrs)
+ (core ptr 'set-from-instr! (car instrs) (prog-name prog))
+ (loop (core '->addr (+ ptr 1)) (cdr instrs))))
+ (make-queue (prog-name prog)
+ (core '->addr (+ addr (prog-offset prog)))))
+
+ (define (can-install-prog? core prog-len addr)
+ (let loop ((ptr addr)
+ (remaining prog-len))
+ (if (= remaining 0)
+ #t
+ (if (null? (core ptr 'name))
+ (loop (core '->addr (+ ptr 1))
+ (- remaining 1))
+ #f))))
+
+ (define (install-progs core progs)
+ (let loop ((queues '())
+ (progs-left progs))
+ (if (null? progs-left)
+ queues
+ (let ((addr (pseudo-random-integer (core 'size)))
+ (prog (car progs-left)))
+ (if (can-install-prog? core (length (prog-instrs prog)) addr)
+ (loop (cons (install-prog core prog addr) queues)
+ (cdr progs-left))
+ (loop queues progs-left))))))
+
+ (define (make-queue name ptr)
+ (list name ptr))
+
+ (define (queue-owner queue) (car queue))
+ (define (queue-ptrs queue) (cdr queue))
+
+ (define (queue-set-ptrs! queue ptrs)
+ (set-cdr! queue ptrs))
+
+ (define (dump-queue queue core)
+ (let loop ((ptrs (queue-ptrs queue)))
+ (unless (null? ptrs)
+ (core 'dump (car ptrs))
+ (print)
+ (loop (cdr ptrs)))))
+
+ (define (prog->string prog)
+ (conc ";redcode\n\n"
+ ";name\t" (prog-name prog) "\n"
+ (if (not (null? (prog-author prog)))
+ (conc ";author\t" (prog-author prog) "\n\n")
+ "\n")
+ "ORG\t" (prog-offset prog) "\t; Execution offset\n\n"
+ (apply conc (map (lambda (instr) (conc (instr '->string) "\n")) (prog-instrs prog)))))
+
+ (define (dump-prog prog)
+ (print (prog->string prog)))
+
+
+ ;;; Executive function
+ ;;
+
+ (define (run-mars core queues steps-left)
+ (if (or (<= steps-left 0)
+ (null? queues)
+ (= (length queues) 1))