;;;; the byte code interpreter
+;;; FIXME: should really be in SB!BYTECODE
(in-package "SB!C")
;;;; This software is part of the SBCL system. See the README file for
((nil)))
`(function ,(res) *))))))
\f
-;;;; the evaluation stack
+;;;; the 'evaluation stack'
+;;;;
+;;;; (The name dates back to CMU CL, when it was used for the IR1
+;;;; interpreted implementation of EVAL. In SBCL >=0.7.0, it's just
+;;;; the byte interpreter stack.)
-;;; the interpreter's evaluation stack
(defvar *eval-stack* (make-array 100)) ; will grow as needed
-;;; FIXME: This seems to be used by the ordinary (non-byte) interpreter
-;;; too, judging from a crash I had when I removed byte-interp.lisp from
-;;; the cold build sequence. It would probably be clearer to pull the
-;;; shared interpreter machinery out of the byte interpreter and ordinary
-;;; interpreter files and put them into their own file shared-interp.lisp
-;;; or something.
;;; the index of the next free element of the interpreter's evaluation stack
(defvar *eval-stack-top* 0)
#!-sb-fluid (declaim (inline eval-stack-ref))
(defun eval-stack-ref (offset)
(declare (type stack-pointer offset))
- (svref sb!eval::*eval-stack* offset))
+ (svref sb!bytecode::*eval-stack* offset))
#!-sb-fluid (declaim (inline (setf eval-stack-ref)))
(defun (setf eval-stack-ref) (new-value offset)
(declare (type stack-pointer offset))
- (setf (svref sb!eval::*eval-stack* offset) new-value))
+ (setf (svref sb!bytecode::*eval-stack* offset) new-value))
(defun push-eval-stack (value)
- (let ((len (length (the simple-vector sb!eval::*eval-stack*)))
+ (let ((len (length (the simple-vector sb!bytecode::*eval-stack*)))
(sp *eval-stack-top*))
(when (= len sp)
(let ((new-stack (make-array (ash len 1))))
- (replace new-stack sb!eval::*eval-stack* :end1 len :end2 len)
- (setf sb!eval::*eval-stack* new-stack)))
+ (replace new-stack sb!bytecode::*eval-stack* :end1 len :end2 len)
+ (setf sb!bytecode::*eval-stack* new-stack)))
(setf *eval-stack-top* (1+ sp))
(setf (eval-stack-ref sp) value)))
(defun allocate-eval-stack (amount)
- (let* ((len (length (the simple-vector sb!eval::*eval-stack*)))
+ (let* ((len (length (the simple-vector sb!bytecode::*eval-stack*)))
(sp *eval-stack-top*)
(new-sp (+ sp amount)))
(declare (type index sp new-sp))
(when (>= new-sp len)
(let ((new-stack (make-array (ash new-sp 1))))
- (replace new-stack sb!eval::*eval-stack* :end1 len :end2 len)
- (setf sb!eval::*eval-stack* new-stack)))
+ (replace new-stack sb!bytecode::*eval-stack* :end1 len :end2 len)
+ (setf sb!bytecode::*eval-stack* new-stack)))
(setf *eval-stack-top* new-sp)
- (let ((stack sb!eval::*eval-stack*))
- (do ((i sp (1+ i))) ; FIXME: DOTIMES? or just :INITIAL-ELEMENT in MAKE-ARRAY?
+ (let ((stack sb!bytecode::*eval-stack*))
+ (do ((i sp (1+ i))) ; FIXME: Use CL:FILL.
((= i new-sp))
- (setf (svref stack i) '#:uninitialized))))
+ (setf (svref stack i) '#:uninitialized-eval-stack-element))))
(values))
(defun pop-eval-stack ()
(new-sp-var (gensym "NEW-SP-"))
(decls nil))
(loop
- (unless (and (consp body) (consp (car body)) (eq (caar body) 'declare))
+ (unless (and (consp body)
+ (consp (car body))
+ (eq (caar body) 'declare))
(return))
(push (pop body) decls))
`(let ((,new-sp-var (- *eval-stack-top* ,num-vars)))
\f
;;;; miscellaneous primitive stubs
-(macrolet ((frob (name &optional (args '(x)))
+(macrolet ((def-frob (name &optional (args '(x)))
`(defun ,name ,args (,name ,@args))))
- (frob %CODE-CODE-SIZE)
- (frob %CODE-DEBUG-INFO)
- (frob %CODE-ENTRY-POINTS)
- (frob %FUNCALLABLE-INSTANCE-FUNCTION)
- (frob %FUNCALLABLE-INSTANCE-LAYOUT)
- (frob %FUNCALLABLE-INSTANCE-LEXENV)
- (frob %FUNCTION-NEXT)
- (frob %FUNCTION-SELF)
- (frob %SET-FUNCALLABLE-INSTANCE-FUNCTION (fin new-val)))
+ (def-frob %code-code-size)
+ (def-frob %code-debug-info)
+ (def-frob %code-entry-points)
+ (def-frob %funcallable-instance-function)
+ (def-frob %funcallable-instance-layout)
+ (def-frob %funcallable-instance-lexenv)
+ (def-frob %function-next)
+ (def-frob %function-self)
+ (def-frob %set-funcallable-instance-function (fin new-val)))
\f
;;;; funny functions
(type pc pc))
pc)
-;;; This is exactly like THROW, except that the tag is the last thing on
-;;; the stack instead of the first. This is used for RETURN-FROM (hence the
-;;; name).
+;;; This is exactly like THROW, except that the tag is the last thing
+;;; on the stack instead of the first. This is used for RETURN-FROM
+;;; (hence the name).
(define-xop return-from (component old-pc pc fp)
(declare (type code-component component)
(type pc old-pc)
(format *trace-output*
"pc=~D, fp=~D, sp=~D, byte=#b~,'0X, frame:~% ~S~%"
pc fp *eval-stack-top* byte
- (subseq sb!eval::*eval-stack* fp *eval-stack-top*)))))
+ (subseq sb!bytecode::*eval-stack* fp *eval-stack-top*)))))
(if (zerop (logand byte #x80))
;; Some stack operation. No matter what, we need the operand,
;; so compute it.
(funcall function ,@(args))))))
(frob))))
+;;; Note: negative RET-PC is a convention for "we need multiple return
+;;; values".
(defun do-call (old-component call-pc ret-pc old-fp num-args named)
(declare (type code-component old-component)
(type pc call-pc)
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