1 ;;;; miscellaneous kernel-level definitions
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
12 (in-package "SB!KERNEL")
14 ;;; Return the 24 bits of data in the header of object X, which must
15 ;;; be an other-pointer object.
16 (defun get-header-data (x)
19 ;;; Set the 24 bits of data in the header of object X (which must be
20 ;;; an other-pointer object) to VAL.
21 (defun set-header-data (x val)
22 (set-header-data x val))
24 ;;; the length of the closure X, i.e. one more than the
25 ;;; number of variables closed over
26 (defun get-closure-length (x)
27 (get-closure-length x))
35 ;;; WIDETAG-OF needs extra code to handle LIST and FUNCTION lowtags. When
36 ;;; we're only dealing with other pointers (eg. when dispatching on array
37 ;;; element type), this is going to be faster.
38 (declaim (inline %other-pointer-widetag))
39 (defun %other-pointer-widetag (x)
40 (sb!sys:sap-ref-8 (int-sap (get-lisp-obj-address x))
41 #.(ecase sb!c:*backend-byte-order*
43 (- sb!vm:other-pointer-lowtag))
45 (- (1- sb!vm:n-word-bytes) sb!vm:other-pointer-lowtag)))))
47 ;;; Return a System-Area-Pointer pointing to the data for the vector
48 ;;; X, which must be simple.
50 ;;; FIXME: So it should be SIMPLE-VECTOR-SAP, right? (or UNHAIRY-VECTOR-SAP,
51 ;;; if the meaning is (SIMPLE-ARRAY * 1) instead of SIMPLE-VECTOR)
52 ;;; (or maybe SIMPLE-VECTOR-DATA-SAP or UNHAIRY-VECTOR-DATA-SAP?)
54 (declare (type (simple-unboxed-array (*)) x))
57 ;;; Return a System-Area-Pointer pointing to the end of the binding stack.
58 (defun sb!c::binding-stack-pointer-sap ()
59 (sb!c::binding-stack-pointer-sap))
61 ;;; Return a System-Area-Pointer pointing to the next free word of the
62 ;;; current dynamic space.
63 (defun sb!c::dynamic-space-free-pointer ()
64 (sb!c::dynamic-space-free-pointer))
66 ;;; Return a System-Area-Pointer pointing to the end of the control stack.
67 (defun sb!c::control-stack-pointer-sap ()
68 (sb!c::control-stack-pointer-sap))
70 ;;; Return the header typecode for FUNCTION. Can be set with SETF.
71 (defun fun-subtype (function)
72 (fun-subtype function))
73 (defun (setf fun-subtype) (type function)
74 (setf (fun-subtype function) type))
76 ;;; Extract the arglist from the function header FUNC.
77 (defun %simple-fun-arglist (func)
78 (%simple-fun-arglist func))
80 (defun (setf %simple-fun-arglist) (new-value func)
81 (setf (%simple-fun-arglist func) new-value))
83 ;;; Extract the name from the function header FUNC.
84 (defun %simple-fun-name (func)
85 (%simple-fun-name func))
87 ;;; Extract the type from the function header FUNC.
88 (defun %simple-fun-type (func)
89 (%simple-fun-type func))
91 (defun %simple-fun-next (simple-fun)
92 (%simple-fun-next simple-fun))
94 (defun %simple-fun-self (simple-fun)
95 (%simple-fun-self simple-fun))
97 ;;; Extract the function from CLOSURE.
98 (defun %closure-fun (closure)
99 (%closure-fun closure))
101 ;;; Return the length of VECTOR. There is no reason to use this in
102 ;;; ordinary code, 'cause length (the vector foo)) is the same.
103 (defun sb!c::vector-length (vector)
104 (sb!c::vector-length vector))
106 ;;; Extract the INDEXth slot from CLOSURE.
107 (defun %closure-index-ref (closure index)
108 (%closure-index-ref closure index))
110 ;;; Allocate a unboxed, simple vector with type code TYPE, length LENGTH, and
111 ;;; WORDS words long. Note: it is your responsibility to ensure that the
112 ;;; relation between LENGTH and WORDS is correct.
113 (defun allocate-vector (type length words)
114 (allocate-vector type length words))
116 ;;; Allocate an array header with type code TYPE and rank RANK.
117 (defun make-array-header (type rank)
118 (make-array-header type rank))
120 ;;; Return a SAP pointing to the instructions part of CODE-OBJ.
121 (defun code-instructions (code-obj)
122 (code-instructions code-obj))
124 ;;; Extract the INDEXth element from the header of CODE-OBJ. Can be
126 (defun code-header-ref (code-obj index)
127 (code-header-ref code-obj index))
129 (defun code-header-set (code-obj index new)
130 (code-header-set code-obj index new))
132 (defun %vector-raw-bits (object offset)
133 (declare (type index offset))
134 (sb!kernel:%vector-raw-bits object offset))
136 (defun %set-vector-raw-bits (object offset value)
137 (declare (type index offset))
138 (declare (type sb!vm:word value))
139 (setf (sb!kernel:%vector-raw-bits object offset) value))
141 (defun make-single-float (x) (make-single-float x))
142 (defun make-double-float (hi lo) (make-double-float hi lo))
144 (defun single-float-bits (x) (single-float-bits x))
145 (defun double-float-high-bits (x) (double-float-high-bits x))
146 (defun double-float-low-bits (x) (double-float-low-bits x))