1 ;;;; This software is part of the SBCL system. See the README file for
4 ;;;; This software is derived from the CMU CL system, which was
5 ;;;; written at Carnegie Mellon University and released into the
6 ;;;; public domain. The software is in the public domain and is
7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
8 ;;;; files for more information.
12 ;;;; Return-multiple with other than one value
14 #+sb-assembling ;; We don't want a vop for this one.
15 (define-assembly-routine
17 (:return-style :none))
19 ;; These four are really arguments.
20 ((:temp nvals any-reg nargs-offset)
21 (:temp vals any-reg nl0-offset)
22 (:temp ocfp any-reg nl1-offset)
23 (:temp lra descriptor-reg lra-offset)
25 ;; These are just needed to facilitate the transfer
26 (:temp lip interior-reg lip-offset)
27 (:temp count any-reg nl2-offset)
28 (:temp dst any-reg nl4-offset)
29 (:temp temp descriptor-reg l0-offset)
31 ;; These are needed so we can get at the register args.
32 (:temp a0 descriptor-reg a0-offset)
33 (:temp a1 descriptor-reg a1-offset)
34 (:temp a2 descriptor-reg a2-offset)
35 (:temp a3 descriptor-reg a3-offset)
36 (:temp a4 descriptor-reg a4-offset)
37 (:temp a5 descriptor-reg a5-offset))
39 ;; Note, because of the way the RETURN-MULTIPLE VOP is written, we
40 ;; can assume that we are never called with NVALS == 1 and that A0
41 ;; has already been loaded.
42 (inst ble nvals default-a0-and-on)
43 (inst ldl a1 (* 1 n-word-bytes) vals)
44 (inst subq nvals (fixnumize 2) count)
45 (inst ble count default-a2-and-on)
46 (inst ldl a2 (* 2 n-word-bytes) vals)
47 (inst subq nvals (fixnumize 3) count)
48 (inst ble count default-a3-and-on)
49 (inst ldl a3 (* 3 n-word-bytes) vals)
50 (inst subq nvals (fixnumize 4) count)
51 (inst ble count default-a4-and-on)
52 (inst ldl a4 (* 4 n-word-bytes) vals)
53 (inst subq nvals (fixnumize 5) count)
54 (inst ble count default-a5-and-on)
55 (inst ldl a5 (* 5 n-word-bytes) vals)
56 (inst subq nvals (fixnumize 6) count)
59 ;; Copy the remaining args to the top of the stack.
60 (inst addq vals (* 6 n-word-bytes) vals)
61 (inst addq cfp-tn (* 6 n-word-bytes) dst)
64 (inst ldl temp 0 vals)
65 (inst addq vals n-word-bytes vals)
67 (inst subq count (fixnumize 1) count)
68 (inst addq dst n-word-bytes dst)
71 (inst br zero-tn done)
74 (inst move null-tn a0)
75 (inst move null-tn a1)
77 (inst move null-tn a2)
79 (inst move null-tn a3)
81 (inst move null-tn a4)
83 (inst move null-tn a5)
89 (inst addq ocfp-tn nvals csp-tn)
92 (lisp-return lra lip))
94 ;;;; tail-call-variable
96 #+sb-assembling ;; no vop for this one either
97 (define-assembly-routine
99 (:return-style :none))
101 ;; These are really args.
102 ((:temp args any-reg nl0-offset)
103 (:temp lexenv descriptor-reg lexenv-offset)
105 ;; We need to compute this
106 (:temp nargs any-reg nargs-offset)
108 ;; These are needed by the blitting code.
109 (:temp src any-reg nl1-offset)
110 (:temp dst any-reg nl2-offset)
111 (:temp count any-reg cfunc-offset)
112 (:temp temp descriptor-reg l0-offset)
114 ;; Needed for the jump
115 (:temp lip interior-reg lip-offset)
117 ;; These are needed so we can get at the register args.
118 (:temp a0 descriptor-reg a0-offset)
119 (:temp a1 descriptor-reg a1-offset)
120 (:temp a2 descriptor-reg a2-offset)
121 (:temp a3 descriptor-reg a3-offset)
122 (:temp a4 descriptor-reg a4-offset)
123 (:temp a5 descriptor-reg a5-offset))
126 ;; Calculate NARGS (as a fixnum)
127 (inst subq csp-tn args nargs)
129 ;; Load the argument regs (must do this now, 'cause the blt might
130 ;; trash these locations)
131 (inst ldl a0 (* 0 n-word-bytes) args)
132 (inst ldl a1 (* 1 n-word-bytes) args)
133 (inst ldl a2 (* 2 n-word-bytes) args)
134 (inst ldl a3 (* 3 n-word-bytes) args)
135 (inst ldl a4 (* 4 n-word-bytes) args)
136 (inst ldl a5 (* 5 n-word-bytes) args)
138 ;; Calc SRC, DST, and COUNT
139 (inst subq nargs (fixnumize register-arg-count) count)
140 (inst addq args (* n-word-bytes register-arg-count) src)
141 (inst ble count done)
142 (inst addq cfp-tn (* n-word-bytes register-arg-count) dst)
146 (inst ldl temp 0 src)
147 (inst addq src n-word-bytes src)
148 (inst stl temp 0 dst)
149 (inst subq count (fixnumize 1) count)
150 (inst addq dst n-word-bytes dst)
151 (inst bgt count loop)
154 ;; We are done. Do the jump.
156 (loadw temp lexenv closure-fun-slot fun-pointer-lowtag)
157 (lisp-jump temp lip)))
160 ;;;; non-local exit noise
162 (define-assembly-routine
164 (:translate %continue-unwind)
165 (:policy :fast-safe))
166 ((:arg block (any-reg descriptor-reg) a0-offset)
167 (:arg start (any-reg descriptor-reg) ocfp-offset)
168 (:arg count (any-reg descriptor-reg) nargs-offset)
169 (:temp lip interior-reg lip-offset)
170 (:temp lra descriptor-reg lra-offset)
171 (:temp cur-uwp any-reg nl0-offset)
172 (:temp next-uwp any-reg nl1-offset)
173 (:temp target-uwp any-reg nl2-offset)
174 (:temp temp1 non-descriptor-reg nl3-offset))
175 (declare (ignore start count))
177 (load-symbol-value cur-uwp *current-unwind-protect-block*)
178 (let ((error (generate-error-code nil invalid-unwind-error)))
179 (inst beq block error))
181 (loadw target-uwp block unwind-block-current-uwp-slot)
182 (inst cmpeq cur-uwp target-uwp temp1)
183 (inst beq temp1 do-uwp)
189 (loadw cfp-tn cur-uwp unwind-block-current-cont-slot)
190 (loadw code-tn cur-uwp unwind-block-current-code-slot)
192 (loadw lra cur-uwp unwind-block-entry-pc-slot)
193 (lisp-return lra lip :frob-code nil))
197 (loadw next-uwp cur-uwp unwind-block-current-uwp-slot)
198 (store-symbol-value next-uwp *current-unwind-protect-block*)
199 (inst br zero-tn do-exit))
201 (define-assembly-routine
203 ((:arg target descriptor-reg a0-offset)
204 (:arg start any-reg ocfp-offset)
205 (:arg count any-reg nargs-offset)
206 (:temp catch any-reg a1-offset)
207 (:temp tag descriptor-reg a2-offset)
208 (:temp temp1 non-descriptor-reg nl0-offset))
210 (progn start count) ; We just need them in the registers.
212 (load-symbol-value catch *current-catch-block*)
216 (let ((error (generate-error-code nil unseen-throw-tag-error target)))
217 (inst beq catch error))
219 (loadw tag catch catch-block-tag-slot)
220 (inst cmpeq tag target temp1)
221 (inst bne temp1 exit)
222 (loadw catch catch catch-block-previous-catch-slot)
223 (inst br zero-tn loop)
228 (inst li (make-fixup 'unwind :assembly-routine) temp1)
229 (inst jmp zero-tn temp1 (make-fixup 'unwind :assembly-routine)))