diff options
Diffstat (limited to 'sb-eval2.lisp')
| -rw-r--r-- | sb-eval2.lisp | 240 |
1 files changed, 35 insertions, 205 deletions
diff --git a/sb-eval2.lisp b/sb-eval2.lisp index 4097de4..ccb0d14 100644 --- a/sb-eval2.lisp +++ b/sb-eval2.lisp @@ -8,9 +8,7 @@ ;;(declaim (optimize (debug 3) (space 0) (speed 0) (safety 3) (compilation-speed 0))) (declaim (optimize (debug 0) (space 0) (speed 3) (safety 0) (compilation-speed 0))) -(defvar *stack*) -(defvar *fp*) -(defvar *sp*) +(defconstant +stack-max+ 1000) (defmacro specialize (&environment env var value possible-values &body body) `(ecase ,value @@ -18,9 +16,6 @@ collect `((,x) ,(sb-int:eval-in-lexenv `(let ((,var ,x)) ,@body) env))))) -(deftype stack () - 'simple-vector) - (declaim (inline %make-environment)) (defstruct (environment (:constructor %make-environment)) (parent nil :type (or null environment)) @@ -44,7 +39,7 @@ `(let* ((,size% ,size) (,data% (make-array (list ,size%))) (,var (%make-environment :parent ,parent :data ,data%))) - (declare (type (mod 1000) ,size%) + (declare (type (mod #.+stack-max+) ,size%) (dynamic-extent ,var) (dynamic-extent ,data%)) ,@body))) @@ -56,18 +51,10 @@ ((offset :accessor lexical-offset :initarg :offset :type fixnum) (nesting :accessor lexical-nesting :initarg :nesting :type fixnum))) -(defclass stack-lexical (lexical) - ((offset :accessor lexical-offset :initarg :offset :type fixnum) - (nesting :accessor lexical-nesting :initarg :nesting :type fixnum))) - -(defun make-stack-lexical (name offset &optional (nesting -1)) - (make-instance 'stack-lexical :name name :offset offset :nesting nesting)) (defun make-env-lexical (name offset &optional (nesting -1)) (make-instance 'env-lexical :name name :offset offset :nesting nesting)) (defgeneric lexical-with-nesting (lexical nesting)) -(defmethod lexical-with-nesting ((lexical stack-lexical) nesting) - (make-stack-lexical (lexical-name lexical) (lexical-offset lexical) nesting)) (defmethod lexical-with-nesting ((lexical env-lexical) nesting) (make-env-lexical (lexical-name lexical) (lexical-offset lexical) nesting)) @@ -116,7 +103,6 @@ (defstruct (context (:constructor make-context (&optional parent))) parent (env-hop nil :type boolean) - (stack-hop nil :type boolean) (block-tags nil :type list) (go-tags nil :type list) (symbol-macros nil :type list) @@ -188,29 +174,10 @@ for v in vars collect (make-env-lexical v i)))) new-context)) -(defun context-bump-stack (context) - (let ((new-context (make-context context))) - (with-slots (stack-hop) - new-context - (setq stack-hop t)) - new-context)) -(defun context-add-stack-lexicals (context vars) - ;; open a new variable context - (let ((new-context (make-context context))) - (with-slots (lexicals stack-hop) - new-context - (setq stack-hop t) - (setq lexicals (loop for i fixnum from 0 - for v in vars - collect (make-stack-lexical v i)))) - new-context)) (defun context-add-env-functions (context fs) (context-add-env-lexicals context (mapcar (lambda (x) `(function ,x)) fs))) -(defun context-add-stack-functions (context fs) - (context-add-stack-lexicals context (mapcar (lambda (x) `(function ,x)) fs))) (defun context-find-lexical (context var) (loop with env-level = 0 - with stack-level = 0 until (null context) for record = (find var (context-lexicals context) @@ -219,12 +186,9 @@ when record do (return (etypecase record - (env-lexical (lexical-with-nesting record env-level)) - (stack-lexical (lexical-with-nesting record stack-level)))) + (env-lexical (lexical-with-nesting record env-level)))) when (context-env-hop context) do (incf env-level) - when (context-stack-hop context) - do (incf stack-level) do (setq context (context-parent context)))) (deftype eval-closure () `(function (environment) *)) @@ -241,112 +205,6 @@ (setq env (environment-parent env))) (setf (svref (environment-data env) offset) val)) -(defmacro with-stack (() &body body) - `(call-with-stack (lambda () ,@body))) - -(declaim (inline call-with-stack)) -(defun call-with-stack (thunk) - (let ((*stack* (make-array '(10000))) - (*fp* 0) - (*sp* 0)) - (funcall thunk))) - -(defmacro with-stack-frame (nvars &body body) - `(call-with-stack-frame ,nvars (lambda () ,@body))) - -(declaim (ftype (function (fixnum function) *) really-call-with-stack-frame) - (inline really-call-with-stack-frame)) -(defun really-call-with-stack-frame (nvars thunk) - (let* ((stack *stack*) - (sp *sp*) - (new-size (+ sp nvars 1))) - (declare (type stack stack) - (type fixnum sp new-size)) - (loop for size fixnum = (array-dimension stack 0) - while (< size new-size) - do (setq stack - (adjust-array stack - (list (the fixnum - (+ new-size (the fixnum - (round (* size 1.5)))))))) - (setq *stack* stack)) - (setf (aref stack sp) (the fixnum *fp*)) - (let ((*fp* sp) - (*sp* new-size)) - (funcall thunk)))) - -(declaim (ftype (function (fixnum function) *) call-with-stack-frame) - (inline call-with-stack-frame)) -(defun call-with-stack-frame (nvars thunk) - (if (boundp '*stack*) - (really-call-with-stack-frame nvars thunk) - (with-stack () (really-call-with-stack-frame nvars thunk)))) - -(declaim (ftype (function (fixnum) *) deref-stack) - (inline deref-stack)) -(defun deref-stack (pos) - (aref (the stack *stack*) pos)) - -(declaim (ftype (function (* fixnum) *) (setf deref-stack)) - (inline (setf deref-stack))) -(defun (setf deref-stack) (val pos) - (setf (aref (the stack *stack*) pos) val)) - -(declaim (ftype (function (fixnum fixnum) *) stack-ref) - (inline stack-ref)) -(defun stack-ref (nesting offset) - (let ((pos (the fixnum *fp*))) - (dotimes (i nesting) - (setq pos (the fixnum (deref-stack pos)))) - (deref-stack (the fixnum (+ 1 offset pos))))) - -(declaim (ftype (function (fixnum) *) stack-ref0) - (inline stack-ref0)) -(defun stack-ref0 (offset) - (deref-stack (the fixnum (+ (the fixnum (+ 1 (the fixnum *fp*))) offset)))) - -(define-compiler-macro stack-ref (&whole form - &environment env - nesting offset) - (if (constantp nesting env) - (let ((num (sb-int:eval-in-lexenv nesting env))) - (if (zerop num) - `(stack-ref0 (the fixnum ,offset)) - `(progn - (let ((pos *fp*)) - ,@(loop for i from 1 to num - collect `(setq pos (the fixnum (deref-stack pos)))) - (deref-stack (the fixnum (+ 1 (the fixnum (+ (the fixnum ,offset) pos))))))))) - form)) - -(declaim (ftype (function (* fixnum fixnum) *) (setf stack-ref)) - (inline (setf stack-ref))) -(defun (setf stack-ref) (val nesting offset) - (let ((pos *fp*)) - (declare (type fixnum pos)) - (dotimes (i nesting) - (setq pos (deref-stack pos))) - (setf (deref-stack (the fixnum (+ 1 offset pos))) val))) - -(declaim (ftype (function (* fixnum) *) (setf stack-ref0)) - (inline (setf stack-ref0))) -(defun (setf stack-ref0) (val offset) - (setf (deref-stack (the fixnum (+ (the fixnum (+ 1 (the fixnum *fp*))) offset))) val)) - -(define-compiler-macro (setf stack-ref) (&whole form - &environment env - val nesting offset) - (if (constantp nesting env) - (let ((num (sb-int:eval-in-lexenv nesting env))) - (if (zerop num) - `(setf (stack-ref0 (the fixnum ,offset)) ,val) - `(progn - (let ((pos *fp*)) - ,@(loop for i from 1 to num - collect `(setq pos (the fixnum (deref-stack pos)))) - (setf (deref-stack (the fixnum (+ 1 (the fixnum (+ (the fixnum ,offset) pos))))) ,val))))) - form)) - (declaim (ftype (function (symbol context) eval-closure) prepare-ref)) (defun prepare-ref (var context) (if (context-var-lexical-p context var) @@ -356,18 +214,7 @@ (etypecase lexical (env-lexical (lambda (env) - (environment-value env nesting offset))) - (stack-lexical - (if (< nesting 20) - (specialize m% nesting (loop for i from 0 below 20 collect i) - `(lambda (env) - (declare (ignore env)) - ;;(format t "~&; stack-ref ~d ~d" nesting offset) - (stack-ref ,m% offset))) - (lambda (env) - (declare (ignore env)) - ;;(format t "~&; stack-ref ~d ~d" nesting offset) - (stack-ref nesting offset)))))) + (environment-value env nesting offset))))) (lambda (env) (declare (ignore env)) (symbol-value var)))) @@ -509,7 +356,7 @@ (key-num (length keys)) (aux-num (length aux)) (varnum (length argvars)) - (envp (or (> varnum 1000) + (envp (or (> varnum +stack-max+) (maybe-closes-over-p `(progn ,@body) argvars))) (new-context (context-add-env-lexicals context argvars)) (default-values (append (mapcar #'lambda-binding-default optional) @@ -671,17 +518,6 @@ (lexical-nesting lexical?) (lexical-offset lexical?)) value)) - (stack-lexical - (let ((nesting (lexical-nesting lexical?)) - (offset (lexical-offset lexical?))) - (if (< nesting 20) - (specialize m% - nesting - (loop for i from 0 below 20 collect i) - `(setf (stack-ref ,m% offset) - value)) - (setf (stack-ref nesting offset) - value)))) (null (setf (symbol-value var) value)))) finally (return result)))))) @@ -757,42 +593,37 @@ (cons form nil))) bindings)) (vars (mapcar #'car real-bindings)) - (envp (maybe-closes-over-p `(progn ,@body) vars)) - (binding-context (if envp - context - (context-bump-stack context))) + (varnum (length vars)) + (envp (or (> varnum +stack-max+) + (maybe-closes-over-p `(progn ,@body) vars))) + (binding-context context) (bindings* (mapcar (lambda (form) (cons (car form) (prepare-form (cdr form) binding-context))) real-bindings)) (n (length (the list bindings))) - (values* (mapcar #'cdr bindings*))) + (values* (mapcar #'cdr bindings*)) + (new-context + (context-add-env-lexicals context + (mapcar #'first bindings*))) + (body* + (prepare-progn body new-context))) (if envp - (let* ((new-context - (context-add-env-lexicals context - (mapcar #'first bindings*))) - (body* - (prepare-progn body new-context))) - (lambda (env) - (let ((new-env (make-environment env n))) - (loop for i from 0 below n - for val* in values* - do (setf (environment-value new-env 0 i) - (funcall (the eval-closure val*) env))) - (funcall body* new-env)))) - (let* ((new-context - (context-add-stack-lexicals context - (mapcar #'first bindings*))) - (body* - (prepare-progn body new-context))) - (lambda (env) - (with-stack-frame n - (loop for i from 0 below n - for val* in values* - do (setf (stack-ref 0 i) - (funcall (the eval-closure val*) env))) - (funcall body* env)))))))) + (lambda (env) + (let ((new-env (make-environment env n))) + (loop for i from 0 below n + for val* in values* + do (setf (environment-value new-env 0 i) + (funcall (the eval-closure val*) env))) + (funcall body* new-env))) + (lambda (env) + (with-dynamic-extent-environment (new-env env n) + (loop for i from 0 below n + for val* in values* + do (setf (environment-value new-env 0 i) + (funcall (the eval-closure val*) env))) + (funcall body* new-env))))))) ((let*) ;; FIXME: SPECIAL declarations! (destructuring-bind (bindings &rest body) (rest form) @@ -1004,11 +835,10 @@ (make-null-environment)) #+(or) -(with-stack () - (funcall (funcall - (prepare-form - '(lambda (a b &optional c (d 10 dp) &rest r &key e (f 12 fp) (g 12 gp) &aux (h 1) (i 2)) - (list a b c d dp e f fp g gp r h i))) - (make-null-environment)) - 1 2 3 4 :f 5 :e 6)) +(funcall (funcall + (prepare-form + '(lambda (a b &optional c (d 10 dp) &rest r &key e (f 12 fp) (g 12 gp) &aux (h 1) (i 2)) + (list a b c d dp e f fp g gp r h i))) + (make-null-environment)) + 1 2 3 4 :f 5 :e 6) ;; => (1 2 3 4 T 6 5 T 12 NIL (:F 5 :E 6) 1 2) |