3 (define-move-fun (load-immediate 1) (vop x y)
5 (any-reg descriptor-reg))
6 (let ((val (tn-value x)))
9 (inst li (fixnumize val) y))
15 (inst li (logior (ash (char-code val) n-widetag-bits)
19 (define-move-fun (load-number 1) (vop x y)
21 (signed-reg unsigned-reg))
22 (let ((x (tn-value x)))
23 (inst li (if (>= x (ash 1 31)) (logior (ash -1 32) x) x) y)))
25 (define-move-fun (load-base-char 1) (vop x y)
26 ((immediate) (base-char-reg))
27 (inst li (char-code (tn-value x)) y))
29 (define-move-fun (load-system-area-pointer 1) (vop x y)
30 ((immediate) (sap-reg))
31 (inst li (sap-int (tn-value x)) y))
33 (define-move-fun (load-constant 5) (vop x y)
34 ((constant) (descriptor-reg))
35 (loadw y code-tn (tn-offset x) other-pointer-lowtag))
37 (define-move-fun (load-stack 5) (vop x y)
38 ((control-stack) (any-reg descriptor-reg))
41 (define-move-fun (load-number-stack 5) (vop x y)
42 ((base-char-stack) (base-char-reg)
44 (signed-stack) (signed-reg)
45 (unsigned-stack) (unsigned-reg))
46 (let ((nfp (current-nfp-tn vop)))
47 (loadw y nfp (tn-offset x))))
49 (define-move-fun (store-stack 5) (vop x y)
50 ((any-reg descriptor-reg) (control-stack))
53 (define-move-fun (store-number-stack 5) (vop x y)
54 ((base-char-reg) (base-char-stack)
56 (signed-reg) (signed-stack)
57 (unsigned-reg) (unsigned-stack))
58 (let ((nfp (current-nfp-tn vop)))
59 (storew x nfp (tn-offset y))))
66 :scs (any-reg descriptor-reg)
67 :load-if (not (location= x y))))
68 (:results (y :scs (any-reg descriptor-reg)
69 :load-if (not (location= x y))))
75 (define-move-vop move :move
76 (any-reg descriptor-reg)
77 (any-reg descriptor-reg))
79 ;;; Make Move the check VOP for T so that type check generation doesn't think
80 ;;; it is a hairy type. This also allows checking of a few of the values in a
81 ;;; continuation to fall out.
83 (primitive-type-vop move (:check) t)
85 ;;; The Move-Argument VOP is used for moving descriptor values into another
86 ;;; frame for argument or known value passing.
88 (define-vop (move-argument)
90 :scs (any-reg descriptor-reg))
92 :load-if (not (sc-is y any-reg descriptor-reg))))
96 ((any-reg descriptor-reg)
99 (storew x fp (tn-offset y))))))
101 (define-move-vop move-argument :move-arg
102 (any-reg descriptor-reg)
103 (any-reg descriptor-reg))
109 ;;; This VOP exists just to begin the lifetime of a TN that couldn't be written
110 ;;; legally due to a type error. An error is signalled before this VOP is
111 ;;; so we don't need to do anything (not that there would be anything sensible
114 (define-vop (illegal-move)
119 (:save-p :compute-only)
121 (error-call vop object-not-type-error x type)))
125 ;;;; Moves and coercions:
127 ;;; These MOVE-TO-WORD VOPs move a tagged integer to a raw full-word
128 ;;; representation. Similarly, the MOVE-FROM-WORD VOPs converts a raw integer
129 ;;; to a tagged bignum or fixnum.
131 ;;; Arg is a fixnum, so just shift it. We need a type restriction because some
132 ;;; possible arg SCs (control-stack) overlap with possible bignum arg SCs.
134 (define-vop (move-to-word/fixnum)
135 (:args (x :scs (any-reg descriptor-reg)))
136 (:results (y :scs (signed-reg unsigned-reg)))
137 (:arg-types tagged-num)
138 (:note "fixnum untagging")
142 (define-move-vop move-to-word/fixnum :move
143 (any-reg descriptor-reg) (signed-reg unsigned-reg))
145 ;;; Arg is a non-immediate constant, load it.
146 (define-vop (move-to-word-c)
147 (:args (x :scs (constant)))
148 (:results (y :scs (signed-reg unsigned-reg)))
149 (:note "constant load")
151 (inst li (tn-value x) y)))
153 (define-move-vop move-to-word-c :move
154 (constant) (signed-reg unsigned-reg))
156 ;;; Arg is a fixnum or bignum, figure out which and load if necessary.
157 (define-vop (move-to-word/integer)
158 (:args (x :scs (descriptor-reg)))
159 (:results (y :scs (signed-reg unsigned-reg)))
160 (:note "integer to untagged word coercion")
162 (inst extru x 31 2 zero-tn :<>)
164 (loadw y x bignum-digits-offset other-pointer-lowtag)))
166 (define-move-vop move-to-word/integer :move
167 (descriptor-reg) (signed-reg unsigned-reg))
169 ;;; Result is a fixnum, so we can just shift. We need the result type
170 ;;; restriction because of the control-stack ambiguity noted above.
172 (define-vop (move-from-word/fixnum)
173 (:args (x :scs (signed-reg unsigned-reg)))
174 (:results (y :scs (any-reg descriptor-reg)))
175 (:result-types tagged-num)
176 (:note "fixnum tagging")
180 (define-move-vop move-from-word/fixnum :move
181 (signed-reg unsigned-reg) (any-reg descriptor-reg))
183 ;;; Result may be a bignum, so we have to check. Use a worst-case cost to make
184 ;;; sure people know they may be number consing.
186 (define-vop (move-from-signed)
187 (:args (x :scs (signed-reg unsigned-reg) :to (:eval 1)))
188 (:results (y :scs (any-reg descriptor-reg) :from (:eval 0)))
189 (:temporary (:scs (non-descriptor-reg)) temp)
190 (:note "signed word to integer coercion")
192 ;; Extract the top three bits.
193 (inst extrs x 2 3 temp :=)
194 ;; Invert them (unless they are already zero).
195 (inst uaddcm zero-tn temp temp)
196 ;; If we are left with zero, it will fit in a fixnum. So branch around
197 ;; the bignum-construction, doing the shift in the delay slot.
198 (inst comb := temp zero-tn done)
200 ;; Make a single-digit bignum.
201 (with-fixed-allocation (y temp bignum-widetag (1+ bignum-digits-offset))
202 (storew x y bignum-digits-offset other-pointer-lowtag))
205 (define-move-vop move-from-signed :move
206 (signed-reg) (descriptor-reg))
209 ;;; Check for fixnum, and possibly allocate one or two word bignum result. Use
210 ;;; a worst-case cost to make sure people know they may be number consing.
212 (define-vop (move-from-unsigned)
213 (:args (x :scs (signed-reg unsigned-reg) :to (:eval 1)))
214 (:results (y :scs (any-reg descriptor-reg) :from (:eval 0)))
215 (:temporary (:scs (non-descriptor-reg)) temp)
216 (:note "unsigned word to integer coercion")
218 ;; Grab the top three bits.
219 (inst extrs x 2 3 temp)
220 ;; If zero, it will fit as a fixnum.
221 (inst comib := 0 temp done)
224 (pseudo-atomic (:extra (pad-data-block (1+ bignum-digits-offset)))
225 ;; Create the result pointer.
226 (inst move alloc-tn y)
227 (inst dep other-pointer-lowtag 31 3 y)
228 ;; Check the high bit, and skip the next instruction it it's 0.
229 (inst comclr x zero-tn zero-tn :>=)
230 ;; The high bit is set, so allocate enough space for a two-word bignum.
231 ;; We always skip the following instruction, so it is only executed
232 ;; when we want one word.
233 (inst addi (pad-data-block 1) alloc-tn alloc-tn :tr)
234 ;; Set up the header for one word. Use addi instead of li so we can
235 ;; skip the next instruction.
236 (inst addi (logior (ash 1 n-widetag-bits) bignum-widetag) zero-tn temp :tr)
237 ;; Set up the header for two words.
238 (inst li (logior (ash 2 n-widetag-bits) bignum-widetag) temp)
239 ;; Store the header and the data.
240 (storew temp y 0 other-pointer-lowtag)
241 (storew x y bignum-digits-offset other-pointer-lowtag))
244 (define-move-vop move-from-unsigned :move
245 (unsigned-reg) (descriptor-reg))
248 ;;; Move untagged numbers.
250 (define-vop (word-move)
252 :scs (signed-reg unsigned-reg)
253 :load-if (not (location= x y))))
254 (:results (y :scs (signed-reg unsigned-reg)
255 :load-if (not (location= x y))))
258 (:note "word integer move")
262 (define-move-vop word-move :move
263 (signed-reg unsigned-reg) (signed-reg unsigned-reg))
266 ;;; Move untagged number arguments/return-values.
268 (define-vop (move-word-argument)
270 :scs (signed-reg unsigned-reg))
272 :load-if (not (sc-is y sap-reg))))
274 (:note "word integer argument move")
277 ((signed-reg unsigned-reg)
279 ((signed-stack unsigned-stack)
280 (storew x fp (tn-offset y))))))
282 (define-move-vop move-word-argument :move-arg
283 (descriptor-reg any-reg signed-reg unsigned-reg) (signed-reg unsigned-reg))
286 ;;; Use standard MOVE-ARGUMENT + coercion to move an untagged number to a
287 ;;; descriptor passing location.
289 (define-move-vop move-argument :move-arg
290 (signed-reg unsigned-reg) (any-reg descriptor-reg))