1 ;;;; x86 definition of character operations
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 ;;;; moves and coercions
16 ;;; Move a tagged char to an untagged representation.
18 (define-vop (move-to-character)
19 (:args (x :scs (any-reg descriptor-reg) :target y
20 :load-if (not (location= x y))))
21 (:results (y :scs (character-reg)
22 :load-if (not (location= x y))))
23 (:note "character untagging")
26 (inst shr y n-widetag-bits)))
28 (define-vop (move-to-character)
29 (:args (x :scs (any-reg control-stack) :target al))
30 (:temporary (:sc byte-reg :offset al-offset
31 :from (:argument 0) :to (:eval 0)) al)
33 (:temporary (:sc byte-reg :offset ah-offset :target y
34 :from (:argument 0) :to (:result 0)) ah)
35 (:results (y :scs (character-reg character-stack)))
36 (:note "character untagging")
40 (define-move-vop move-to-character :move
41 (any-reg #!-sb-unicode control-stack)
42 (character-reg #!-sb-unicode character-stack))
44 ;;; Move an untagged char to a tagged representation.
46 (define-vop (move-from-character)
47 (:args (x :scs (character-reg) :target y))
48 (:results (y :scs (any-reg descriptor-reg)))
49 (:note "character tagging")
52 (inst shl y n-widetag-bits)
53 (inst or y character-widetag)))
55 (define-vop (move-from-character)
56 (:args (x :scs (character-reg character-stack) :target ah))
57 (:temporary (:sc byte-reg :offset al-offset :target y
58 :from (:argument 0) :to (:result 0)) al)
59 (:temporary (:sc byte-reg :offset ah-offset
60 :from (:argument 0) :to (:result 0)) ah)
61 (:results (y :scs (any-reg descriptor-reg control-stack)))
62 (:note "character tagging")
64 (move ah x) ; Maybe move char byte.
65 (inst mov al character-widetag) ; x86 to type bits
66 (inst and eax-tn #xffff) ; Remove any junk bits.
68 (define-move-vop move-from-character :move
69 (character-reg #!-sb-unicode character-stack)
70 (any-reg descriptor-reg #!-sb-unicode control-stack))
72 ;;; Move untagged character values.
73 (define-vop (character-move)
76 :load-if (not (location= x y))))
77 (:results (y :scs (character-reg character-stack)
78 :load-if (not (location= x y))))
79 (:note "character move")
84 (define-move-vop character-move :move
85 (character-reg) (character-reg character-stack))
87 ;;; Move untagged character arguments/return-values.
88 (define-vop (move-character-arg)
92 :load-if (not (sc-is y character-reg))))
94 (:note "character arg move")
102 ;; XXX: If the sb-unicode case needs to handle c-call,
103 ;; why does the non-unicode case not need to?
104 (make-ea :byte :base fp :disp (frame-byte-offset (tn-offset y)))
107 (if (= (tn-offset fp) esp-offset)
108 (storew x fp (tn-offset y)) ; c-call
109 (storew x fp (frame-word-offset (tn-offset y))))))))
110 (define-move-vop move-character-arg :move-arg
111 (any-reg character-reg) (character-reg))
113 ;;; Use standard MOVE-ARG + coercion to move an untagged character
114 ;;; to a descriptor passing location.
115 (define-move-vop move-arg :move-arg
116 (character-reg) (any-reg descriptor-reg))
118 ;;;; other operations
120 (define-vop (char-code)
121 (:translate char-code)
123 (:args #!-sb-unicode (ch :scs (character-reg character-stack))
124 #!+sb-unicode (ch :scs (character-reg character-stack) :target res))
125 (:arg-types character)
126 (:results (res :scs (unsigned-reg)))
127 (:result-types positive-fixnum)
135 (define-vop (code-char)
136 (:translate code-char)
138 (:args (code :scs (unsigned-reg unsigned-stack) :target res))
139 (:arg-types positive-fixnum)
140 (:results (res :scs (character-reg)))
141 (:result-types character)
145 (define-vop (code-char)
146 (:translate code-char)
148 (:args (code :scs (unsigned-reg unsigned-stack) :target eax))
149 (:arg-types positive-fixnum)
150 (:temporary (:sc unsigned-reg :offset eax-offset :target res
151 :from (:argument 0) :to (:result 0))
153 (:results (res :scs (character-reg)))
154 (:result-types character)
159 ;;; comparison of CHARACTERs
160 (define-vop (character-compare)
161 (:args (x :scs (character-reg character-stack))
162 (y :scs (character-reg)
163 :load-if (not (and (sc-is x character-reg)
164 (sc-is y character-stack)))))
165 (:arg-types character character)
167 (:note "inline comparison")
171 (define-vop (fast-char=/character character-compare)
175 (define-vop (fast-char</character character-compare)
179 (define-vop (fast-char>/character character-compare)
183 (define-vop (character-compare/c)
184 (:args (x :scs (character-reg character-stack)))
185 (:arg-types character (:constant character))
188 (:note "inline constant comparison")
190 (inst cmp x (sb!xc:char-code y))))
192 (define-vop (fast-char=/character/c character-compare/c)
196 (define-vop (fast-char</character/c character-compare/c)
200 (define-vop (fast-char>/character/c character-compare/c)