;;; An implementation of the Memory Array Redcode Simulator (MARS)
;;;
-(import (chicken io)
- (chicken string)
- (chicken random)
- (chicken condition)
- (chicken process-context)
- matchable wish)
-
-
-;;; Instructions
-;;
-
-(define (make-instr opcode modifier A-mode A-num B-mode B-num)
- (lambda args
- (match args
- (('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
- " " (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."))))
-
-(define initial-instruction
- (make-instr 'DAT 'F 'immediate 0 'immediate 0))
-
-
-;;; 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))))
- (let loop ((i 0))
- (unless (>= i core-size)
- (vector-set! core-vec i (initial-instr 'make-copy))
- (loop (+ i 1))))
+(module mars
+ (make-instr
+ make-prog
+ prog-name
+ prog-instrs
+ prog-offset
+ install-progs
+ make-queue
+ queue-owner
+ queue-ptrs
+ make-core
+ run-mars)
+
+ (import scheme
+ (chicken base)
+ (chicken io)
+ (chicken string)
+ (chicken random)
+ (chicken condition)
+ (chicken process-context)
+ matchable)
+
+
+ ;;; Instructions
+ ;;
+
+ (define (make-instr opcode modifier A-mode A-num B-mode B-num)
(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)
- (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)
- 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))
-
-
-;;; Executive function
-;;
-
-(define (run core queues steps-left)
- (cond
- ((<= steps-left 0) queues) ;Tie between remaining players
- ;; ((<= (length queues) 1) queues) ;There's only one player left who thus wins
- (else
- (let* ((queue (car queues))
- (remaining-queues (cdr queues))
- (ptrs (queue-ptrs queue))
- (new-ptrs (execute-instr core (car ptrs) (queue-owner queue))))
- (if (null? new-ptrs)
- (run remaining-queues (- steps-left 1))
- (begin
- (queue-set-ptrs! queue (append (cdr ptrs) new-ptrs))
- (run core (append remaining-queues (list queue)) (- steps-left 1))))))))
-
-(define (execute-instr core ptr name)
- (let* ((A-ptr (eval-operand core (core ptr 'A-mode) (core ptr 'A-num) ptr name))
- (B-ptr (eval-operand core (core ptr 'B-mode) (core ptr 'B-num) ptr name))
- (modifier (core ptr 'modifier)))
- (case (core ptr 'opcode)
- ((DAT)
- '()) ;Game over, man, game over!
- ((MOV)
- (if (eq? modifier 'I)
- (core B-ptr 'set-from! A-ptr name)
- (combine-and-store core A-ptr B-ptr modifier name (lambda (x y) y)))
- (list (core '->addr (+ ptr 1))))
- ((ADD)
- (combine-and-store core A-ptr B-ptr modifier name +)
- (list (core '->addr (+ ptr 1))))
- ((SUB)
- (combine-and-store core A-ptr B-ptr modifier name -)
- (list (core '->addr (+ ptr 1))))
- ((MUL)
- (combine-and-store core A-ptr B-ptr modifier name *)
- (list (core '->addr (+ ptr 1))))
- ((DIV)
- (condition-case
- (begin
- (combine-and-store core A-ptr B-ptr modifier name quotient)
-
- (list (core '->addr (+ ptr 1))))
- ((exn arithmetic) '())))
- ((MOD)
- (condition-case
- (begin
- (combine-and-store core A-ptr B-ptr modifier name modulo)
- (list (core '->addr (+ ptr 1))))
- ((exn arithmetic) '())))
- ((JMP)
- (list (core '->addr (+ ptr (core A-ptr 'A-num)))))
- ((JMZ)
- (list (core '->addr (+ ptr (if (instr-zero? B-ptr modifier #f name)
- (core A-ptr 'A-num)
- 1)))))
- ((JMN)
- (list (core '->addr (+ ptr (if (not (instr-zero? B-ptr modifier #f name))
- (core A-ptr 'A-num)
- 1)))))
- ((DJN)
- (list (core '->addr (+ ptr (if (not (instr-zero? B-ptr modifier #t name))
- (core A-ptr 'A-num)
- 1)))))
- ((SEQ CMP)
- (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier =) 2 1)))))
- ((SNE)
- (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier =) 1 2)))))
- ((SLT)
- (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier <) 2 1)))))
- ((SPL)
- (list (core '->addr (+ ptr 1) (core '->addr (+ ptr (core A-ptr 'A-num))))))
- ((NOP)
- (list (core '->addr (+ ptr 1))))
+ (('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
+ " " (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 "Unrecognised opcode" (instr 'opcode))))))
-
-(define (compare-instrs core A-ptr B-ptr modifier test)
- (case modifier
- ((A) (test (core A-ptr 'A-num) (core B-ptr 'A-num)))
- ((B) (test (core A-ptr 'B-num) (core B-ptr 'B-num)))
- ((AB) (test (core A-ptr 'A-num) (core B-ptr 'B-num)))
- ((BA) (test (core A-ptr 'B-num) (core B-ptr 'A-num)))
- ((F) (and
- (test (core A-ptr 'A-num) (core B-ptr 'A-num))
- (test (core A-ptr 'B-num) (core B-ptr 'B-num))))
- ((X) (and
- (test (core A-ptr 'A-num) (core B-ptr 'B-num))
- (test (core A-ptr 'B-num) (core B-ptr 'A-num))))
- ((I) (and
- (if (eq? test =)
- (and
- (eq? (core A-ptr 'opcode) (core B-ptr 'opcode))
- (eq? (core A-ptr 'modifier) (core B-ptr 'modifier))
- (eq? (core A-ptr 'A-mode) (core B-ptr 'B-mode))
- (eq? (core A-ptr 'B-mode) (core B-ptr 'A-mode)))
- #t)
- (test (core A-ptr 'A-num) (core B-ptr 'B-num))
- (test (core A-ptr 'B-num) (core B-ptr 'A-num))))))
-
-(define (instr-zero? core ptr modifier decrement name)
- (case modifier
- ((A AB)
- (if decrement (core ptr 'set! 'A-num (- (core ptr 'A-num) 1) name))
- (= 0 (core ptr 'A-num)))
- ((A AB)
- (if decrement (core ptr 'set! 'B-num (- (core ptr 'B-num) 1) name))
- (= 0 (core ptr 'B-num)))
- ((X I F)
- (if decrement
- (begin
- (core ptr 'set! 'A-num (- (core ptr 'A-num) 1) name)
- (core ptr 'set! 'B-num (- (core ptr 'B-num) 1) name)))
- (and (= 0 (core ptr 'A-num))
- (= 0 (core ptr 'B-num))))))
-
-(define (combine-and-store core A-ptr B-ptr modifier name f)
- (case modifier
- ((A) (core B-ptr 'set! 'A-num
- (f (core B-ptr 'A-num) (core A-ptr 'A-num)) name))
- ((B) (core B-ptr 'set! 'B-num
- (f (core B-ptr 'B-num) (core A-ptr 'B-num)) name))
- ((AB) (core B-ptr 'set! 'B-num
- (f (core B-ptr 'B-num) (core A-ptr 'A-num)) name))
- ((BA) (core B-ptr 'set! 'A-num
- (f (core B-ptr 'A-num) (core A-ptr 'B-num)) name))
- ((F I) (core B-ptr 'set! 'A-num
- (f (core B-ptr 'A-num) (core A-ptr 'A-num)) name)
- (core B-ptr 'set! 'B-num
+ (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))))
+ (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)
+ (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)
+ 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))
+
+
+ ;;; Executive function
+ ;;
+
+ (define (run-mars core queues steps-left)
+ (cond
+ ((<= steps-left 0) queues) ;Tie between remaining players
+ ;; ((<= (length queues) 1) queues) ;There's only one player left who thus wins
+ (else
+ (let* ((queue (car queues))
+ (remaining-queues (cdr queues))
+ (ptrs (queue-ptrs queue))
+ (new-ptrs (execute-instr core (car ptrs) (queue-owner queue))))
+ (if (null? new-ptrs)
+ (run-mars remaining-queues (- steps-left 1))
+ (begin
+ (queue-set-ptrs! queue (append (cdr ptrs) new-ptrs))
+ (run-mars core (append remaining-queues (list queue)) (- steps-left 1))))))))
+
+ (define (execute-instr core ptr name)
+ (let* ((A-ptr (eval-operand core (core ptr 'A-mode) (core ptr 'A-num) ptr name))
+ (B-ptr (eval-operand core (core ptr 'B-mode) (core ptr 'B-num) ptr name))
+ (modifier (core ptr 'modifier)))
+ (case (core ptr 'opcode)
+ ((DAT)
+ '()) ;Game over, man, game over!
+ ((MOV)
+ (if (eq? modifier 'I)
+ (core B-ptr 'set-from! A-ptr name)
+ (combine-and-store core A-ptr B-ptr modifier name (lambda (x y) y)))
+ (list (core '->addr (+ ptr 1))))
+ ((ADD)
+ (combine-and-store core A-ptr B-ptr modifier name +)
+ (list (core '->addr (+ ptr 1))))
+ ((SUB)
+ (combine-and-store core A-ptr B-ptr modifier name -)
+ (list (core '->addr (+ ptr 1))))
+ ((MUL)
+ (combine-and-store core A-ptr B-ptr modifier name *)
+ (list (core '->addr (+ ptr 1))))
+ ((DIV)
+ (condition-case
+ (begin
+ (combine-and-store core A-ptr B-ptr modifier name quotient)
+
+ (list (core '->addr (+ ptr 1))))
+ ((exn arithmetic) '())))
+ ((MOD)
+ (condition-case
+ (begin
+ (combine-and-store core A-ptr B-ptr modifier name modulo)
+ (list (core '->addr (+ ptr 1))))
+ ((exn arithmetic) '())))
+ ((JMP)
+ (list (core '->addr (+ ptr (core A-ptr 'A-num)))))
+ ((JMZ)
+ (list (core '->addr (+ ptr (if (instr-zero? B-ptr modifier #f name)
+ (core A-ptr 'A-num)
+ 1)))))
+ ((JMN)
+ (list (core '->addr (+ ptr (if (not (instr-zero? B-ptr modifier #f name))
+ (core A-ptr 'A-num)
+ 1)))))
+ ((DJN)
+ (list (core '->addr (+ ptr (if (not (instr-zero? B-ptr modifier #t name))
+ (core A-ptr 'A-num)
+ 1)))))
+ ((SEQ CMP)
+ (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier =) 2 1)))))
+ ((SNE)
+ (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier =) 1 2)))))
+ ((SLT)
+ (list (core '->addr (+ ptr (if (compare-instrs core A-ptr B-ptr modifier <) 2 1)))))
+ ((SPL)
+ (list (core '->addr (+ ptr 1) (core '->addr (+ ptr (core A-ptr 'A-num))))))
+ ((NOP)
+ (list (core '->addr (+ ptr 1))))
+ (else
+ (error "Unrecognised opcode" (core ptr 'opcode))))))
+
+ (define (compare-instrs core A-ptr B-ptr modifier test)
+ (case modifier
+ ((A) (test (core A-ptr 'A-num) (core B-ptr 'A-num)))
+ ((B) (test (core A-ptr 'B-num) (core B-ptr 'B-num)))
+ ((AB) (test (core A-ptr 'A-num) (core B-ptr 'B-num)))
+ ((BA) (test (core A-ptr 'B-num) (core B-ptr 'A-num)))
+ ((F) (and
+ (test (core A-ptr 'A-num) (core B-ptr 'A-num))
+ (test (core A-ptr 'B-num) (core B-ptr 'B-num))))
+ ((X) (and
+ (test (core A-ptr 'A-num) (core B-ptr 'B-num))
+ (test (core A-ptr 'B-num) (core B-ptr 'A-num))))
+ ((I) (and
+ (if (eq? test =)
+ (and
+ (eq? (core A-ptr 'opcode) (core B-ptr 'opcode))
+ (eq? (core A-ptr 'modifier) (core B-ptr 'modifier))
+ (eq? (core A-ptr 'A-mode) (core B-ptr 'B-mode))
+ (eq? (core A-ptr 'B-mode) (core B-ptr 'A-mode)))
+ #t)
+ (test (core A-ptr 'A-num) (core B-ptr 'B-num))
+ (test (core A-ptr 'B-num) (core B-ptr 'A-num))))))
+
+ (define (instr-zero? core ptr modifier decrement name)
+ (case modifier
+ ((A AB)
+ (if decrement (core ptr 'set! 'A-num (- (core ptr 'A-num) 1) name))
+ (= 0 (core ptr 'A-num)))
+ ((A AB)
+ (if decrement (core ptr 'set! 'B-num (- (core ptr 'B-num) 1) name))
+ (= 0 (core ptr 'B-num)))
+ ((X I F)
+ (if decrement
+ (begin
+ (core ptr 'set! 'A-num (- (core ptr 'A-num) 1) name)
+ (core ptr 'set! 'B-num (- (core ptr 'B-num) 1) name)))
+ (and (= 0 (core ptr 'A-num))
+ (= 0 (core ptr 'B-num))))))
+
+ (define (combine-and-store core A-ptr B-ptr modifier name f)
+ (case modifier
+ ((A) (core B-ptr 'set! 'A-num
+ (f (core B-ptr 'A-num) (core A-ptr 'A-num)) name))
+ ((B) (core B-ptr 'set! 'B-num
(f (core B-ptr 'B-num) (core A-ptr 'B-num)) name))
- ((X) (core B-ptr 'set! 'A-num
- (f (core B-ptr 'A-num) (core A-ptr 'B-num)) name)
- (core B-ptr 'set! 'B-num
- (f (core B-ptr 'B-num) (core A-ptr 'A-num)) name))))
-
-(define (eval-operand core mode num ptr name)
- (core '->addr (+ ptr
- (case mode
- ((immediate) 0)
- ((direct) num)
- ((indirect-A) (+ num (core (+ ptr num) 'A-num)))
- ((indirect-B) (+ num (core (+ ptr num) 'B-num)))
- ((pre-indirect-A)
- (let ((aux-ptr (+ ptr num)))
- (core aux-ptr 'set! 'A-num (- (core aux-ptr 'A-num) 1) name)
- (+ num (core aux-ptr 'A-num))))
- ((pre-indirect-B)
- (let ((aux-ptr (+ ptr num)))
- (core aux-ptr 'set! 'B-num (- (core aux-ptr 'B-num) 1) name)
- (+ num (core aux-ptr 'B-num))))
- ((post-indirect-A)
- (let* ((aux-ptr (+ ptr num))
- (old-A-num (core aux-ptr 'A-num)))
- (core aux-ptr 'set! 'A-num (+ (core aux-ptr 'A-num) 1) name)
- (+ num old-A-num)))
- ((post-indirect-B)
- (let* ((aux-ptr (+ ptr num))
- (old-B-num (core aux-ptr 'B-num)))
- (core aux-ptr 'set! 'B-num (+ (core aux-ptr 'B-num) 1) name)
- (+ num old-B-num)))
- (else
- (error "Unrecognized mode" mode))))))
-
-;;; Main procedure
-;;
-
-;;; TEST CODE
-
-(define addressing-test
- (make-prog 'at (list
- (make-instr 'DAT 'F 'immediate 42 'immediate 53)
- (make-instr 'DAT 'F 'immediate 123 'immediate 256)
- (make-instr 'MOV 'A 'indirect-B 4 'direct 7)
- (make-instr 'NOP 'I 'immediate 0 'immediate 0)
- (make-instr 'NOP 'I 'immediate 0 'immediate 0)
- (make-instr 'NOP 'I 'immediate 0 'immediate 0)
- (make-instr 'DAT 'F 'immediate -5 'immediate -6)) 2))
-
-(define imp
- (make-prog 'imp (list (make-instr 'MOV 'I 'direct 0 'direct 1)) 0))
-
-(define dwarf
- (make-prog 'dwarf (list
- (make-instr 'DAT 'F 'immediate 0 'immediate -1)
- (make-instr 'ADD 'AB 'immediate 5 'direct -1)
- (make-instr 'MOV 'I 'direct -2 'indirect-B -2)
- (make-instr 'JMP 'I 'immediate -2 'immediate 0)) 1))
-
-(define palette '((imp . "red")
- (dwarf . "blue")))
-
-(define w (make-wish 640 480 palette))
-
-(define core (make-core (* 640 480) (make-instr 'DAT 'F 'immediate 0 'immediate 0)
- (lambda (i n)
- (set-wish-pixel w
- (remainder i 640)
- (quotient i 640)
- (cdr (assoc n palette))))))
-(define queues (install-progs core (list dwarf imp)))
+ ((AB) (core B-ptr 'set! 'B-num
+ (f (core B-ptr 'B-num) (core A-ptr 'A-num)) name))
+ ((BA) (core B-ptr 'set! 'A-num
+ (f (core B-ptr 'A-num) (core A-ptr 'B-num)) name))
+ ((F I) (core B-ptr 'set! 'A-num
+ (f (core B-ptr 'A-num) (core A-ptr 'A-num)) name)
+ (core B-ptr 'set! 'B-num
+ (f (core B-ptr 'B-num) (core A-ptr 'B-num)) name))
+ ((X) (core B-ptr 'set! 'A-num
+ (f (core B-ptr 'A-num) (core A-ptr 'B-num)) name)
+ (core B-ptr 'set! 'B-num
+ (f (core B-ptr 'B-num) (core A-ptr 'A-num)) name))))
+
+ (define (eval-operand core mode num ptr name)
+ (core '->addr (+ ptr
+ (case mode
+ ((immediate) 0)
+ ((direct) num)
+ ((indirect-A) (+ num (core (+ ptr num) 'A-num)))
+ ((indirect-B) (+ num (core (+ ptr num) 'B-num)))
+ ((pre-indirect-A)
+ (let ((aux-ptr (+ ptr num)))
+ (core aux-ptr 'set! 'A-num (- (core aux-ptr 'A-num) 1) name)
+ (+ num (core aux-ptr 'A-num))))
+ ((pre-indirect-B)
+ (let ((aux-ptr (+ ptr num)))
+ (core aux-ptr 'set! 'B-num (- (core aux-ptr 'B-num) 1) name)
+ (+ num (core aux-ptr 'B-num))))
+ ((post-indirect-A)
+ (let* ((aux-ptr (+ ptr num))
+ (old-A-num (core aux-ptr 'A-num)))
+ (core aux-ptr 'set! 'A-num (+ (core aux-ptr 'A-num) 1) name)
+ (+ num old-A-num)))
+ ((post-indirect-B)
+ (let* ((aux-ptr (+ ptr num))
+ (old-B-num (core aux-ptr 'B-num)))
+ (core aux-ptr 'set! 'B-num (+ (core aux-ptr 'B-num) 1) name)
+ (+ num old-B-num)))
+ (else
+ (error "Unrecognized mode" mode)))))))
The Lambda Lab / projects / jars.git / blobdiff