1 ;;;; VOPs and macro magic for calling static functions
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.
14 (define-vop (static-fun-template)
17 (:variant-vars symbol)
19 (:temporary (:scs (non-descriptor-reg)) temp)
20 (:temporary (:scs (descriptor-reg)) move-temp)
21 (:temporary (:sc descriptor-reg :offset lra-offset) lra)
22 (:temporary (:sc interior-reg :offset lip-offset) entry-point)
23 (:temporary (:sc any-reg :offset nargs-offset) nargs)
24 (:temporary (:sc any-reg :offset ocfp-offset) old-fp)
25 (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save))
28 (eval-when (:compile-toplevel :load-toplevel :execute)
31 (defun static-fun-template-name (num-args num-results)
32 (intern (format nil "~:@(~R-arg-~R-result-static-fun~)"
33 num-args num-results)))
36 (defun moves (dst src)
38 (do ((dst dst (cdr dst))
40 ((or (null dst) (null src)))
41 (moves `(move ,(car dst) ,(car src))))
44 (defun static-fun-template-vop (num-args num-results)
45 (assert (and (<= num-args register-arg-count)
46 (<= num-results register-arg-count))
47 (num-args num-results)
48 "Either too many args (~W) or too many results (~W). Max = ~W"
49 num-args num-results register-arg-count)
50 (let ((num-temps (max num-args num-results)))
51 (collect ((temp-names) (temps) (arg-names) (args) (result-names) (results))
52 (dotimes (i num-results)
53 (let ((result-name (intern (format nil "RESULT-~D" i))))
54 (result-names result-name)
55 (results `(,result-name :scs (any-reg descriptor-reg)))))
56 (dotimes (i num-temps)
57 (let ((temp-name (intern (format nil "TEMP-~D" i))))
58 (temp-names temp-name)
59 (temps `(:temporary (:sc descriptor-reg
60 :offset ,(nth i *register-arg-offsets*)
61 ,@(when (< i num-args)
62 `(:from (:argument ,i)))
63 ,@(when (< i num-results)
65 :target ,(nth i (result-names)))))
68 (let ((arg-name (intern (format nil "ARG-~D" i))))
71 :scs (any-reg descriptor-reg)
72 :target ,(nth i (temp-names))))))
73 `(define-vop (,(static-fun-template-name num-args num-results)
77 (:results ,@(results))
78 (:generator ,(+ 50 num-args num-results)
79 (let ((lra-label (gen-label))
80 (cur-nfp (current-nfp-tn vop)))
81 ,@(moves (temp-names) (arg-names))
82 (inst lwz entry-point null-tn (static-fun-offset symbol))
83 (inst lr nargs (fixnumize ,num-args))
85 (store-stack-tn nfp-save cur-nfp))
86 (inst mr old-fp cfp-tn)
87 (inst mr cfp-tn csp-tn)
88 (inst compute-lra-from-code lra code-tn lra-label temp)
89 (note-this-location vop :call-site)
90 ;(inst mr code-tn func)
91 (inst mtctr entry-point)
93 (emit-return-pc lra-label)
94 ,(collect ((bindings) (links))
95 (do ((temp (temp-names) (cdr temp))
96 (name 'values (gensym))
101 (make-tn-ref ,(car temp) nil)))
103 (links `(setf (tn-ref-across ,prev) ,name))))
106 (default-unknown-values vop
107 ,(if (zerop num-results) nil 'values)
108 ,num-results move-temp temp lra-label)))
110 (load-stack-tn cur-nfp nfp-save))
111 ,@(moves (result-names) (temp-names))))))))
116 (macrolet ((frob (num-args num-res)
117 (static-fun-template-vop (eval num-args) (eval num-res))))
125 (defmacro define-static-fun (name args &key (results '(x)) translate
126 policy cost arg-types result-types)
128 ,(static-fun-template-name (length args)
131 (:note ,(format nil "static-fun ~@(~S~)" name))
133 `((:translate ,translate)))
135 `((:policy ,policy)))
137 `((:generator-cost ,cost)))
139 `((:arg-types ,@arg-types)))
141 `((:result-types ,@result-types)))))