src/compiler/hppa/move.lisp

   1 (in-package "SB!VM")
   2
   3 (define-move-fun (load-immediate 1) (vop x y)
   4   ((null zero immediate)
   5    (any-reg descriptor-reg))
   6   (let ((val (tn-value x)))
   7     (etypecase val
   8       (integer
   9        (inst li (fixnumize val) y))
  10       (null
  11        (move null-tn y))
  12       (symbol
  13        (load-symbol y val))
  14       (character
  15        (inst li (logior (ash (char-code val) n-widetag-bits)
  16                         base-char-widetag)
  17              y)))))
  18
  19 (define-move-fun (load-number 1) (vop x y)
  20   ((immediate zero)
  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)))
  24
  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))
  28
  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))
  32
  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))
  36
  37 (define-move-fun (load-stack 5) (vop x y)
  38   ((control-stack) (any-reg descriptor-reg))
  39   (load-stack-tn y x))
  40
  41 (define-move-fun (load-number-stack 5) (vop x y)
  42   ((base-char-stack) (base-char-reg)
  43    (sap-stack) (sap-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))))
  48
  49 (define-move-fun (store-stack 5) (vop x y)
  50   ((any-reg descriptor-reg) (control-stack))
  51   (store-stack-tn y x))
  52
  53 (define-move-fun (store-number-stack 5) (vop x y)
  54   ((base-char-reg) (base-char-stack)
  55    (sap-reg) (sap-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))))
  60
  61 \f
  62 ;;;; The Move VOP:
  63 ;;;
  64 (define-vop (move)
  65   (:args (x :target 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))))
  70   (:effects)
  71   (:affected)
  72   (:generator 0
  73     (move x y)))
  74
  75 (define-move-vop move :move
  76   (any-reg descriptor-reg)
  77   (any-reg descriptor-reg))
  78
  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.
  82 ;;;
  83 (primitive-type-vop move (:check) t)
  84
  85 ;;;    The Move-Argument VOP is used for moving descriptor values into another
  86 ;;; frame for argument or known value passing.
  87 ;;;
  88 (define-vop (move-argument)
  89   (:args (x :target y
  90             :scs (any-reg descriptor-reg))
  91          (fp :scs (any-reg)
  92              :load-if (not (sc-is y any-reg descriptor-reg))))
  93   (:results (y))
  94   (:generator 0
  95     (sc-case y
  96       ((any-reg descriptor-reg)
  97        (move x y))
  98       (control-stack
  99        (storew x fp (tn-offset y))))))
 100 ;;;
 101 (define-move-vop move-argument :move-arg
 102   (any-reg descriptor-reg)
 103   (any-reg descriptor-reg))
 104
 105
 106 \f
 107 ;;;; ILLEGAL-MOVE
 108
 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
 112 ;;; to do anyway.)
 113 ;;;
 114 (define-vop (illegal-move)
 115   (:args (x) (type))
 116   (:results (y))
 117   (:ignore y)
 118   (:vop-var vop)
 119   (:save-p :compute-only)
 120   (:generator 666
 121     (error-call vop object-not-type-error x type)))
 122
 123
 124 \f
 125 ;;;; Moves and coercions:
 126
 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.
 130
 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.
 133 ;;;
 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")
 139   (:generator 1
 140     (inst sra x 2 y)))
 141 ;;;
 142 (define-move-vop move-to-word/fixnum :move
 143   (any-reg descriptor-reg) (signed-reg unsigned-reg))
 144
 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")
 150   (:generator 1
 151     (inst li (tn-value x) y)))
 152 ;;;
 153 (define-move-vop move-to-word-c :move
 154   (constant) (signed-reg unsigned-reg))
 155
 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")
 161   (:generator 3
 162     (inst extru x 31 2 zero-tn :<>)
 163     (inst sra x 2 y :tr)
 164     (loadw y x bignum-digits-offset other-pointer-lowtag)))
 165 ;;;
 166 (define-move-vop move-to-word/integer :move
 167   (descriptor-reg) (signed-reg unsigned-reg))
 168
 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.
 171 ;;;
 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")
 177   (:generator 1
 178     (inst sll x 2 y)))
 179 ;;;
 180 (define-move-vop move-from-word/fixnum :move
 181   (signed-reg unsigned-reg) (any-reg descriptor-reg))
 182
 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.
 185 ;;;
 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")
 191   (:generator 18
 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)
 199     (inst sll x 2 y)
 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))
 203     DONE))
 204 ;;;
 205 (define-move-vop move-from-signed :move
 206   (signed-reg) (descriptor-reg))
 207
 208
 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.
 211 ;;;
 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")
 217   (:generator 20
 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)
 222     (inst sll x 2 y)
 223     ;; Make a bignum.
 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 if 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))
 242     DONE))
 243 ;;;
 244 (define-move-vop move-from-unsigned :move
 245   (unsigned-reg) (descriptor-reg))
 246
 247
 248 ;;; Move untagged numbers.
 249 ;;;
 250 (define-vop (word-move)
 251   (:args (x :target y
 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))))
 256   (:effects)
 257   (:affected)
 258   (:note "word integer move")
 259   (:generator 0
 260     (move x y)))
 261 ;;;
 262 (define-move-vop word-move :move
 263   (signed-reg unsigned-reg) (signed-reg unsigned-reg))
 264
 265
 266 ;;; Move untagged number arguments/return-values.
 267 ;;;
 268 (define-vop (move-word-argument)
 269   (:args (x :target y
 270             :scs (signed-reg unsigned-reg))
 271          (fp :scs (any-reg)
 272              :load-if (not (sc-is y sap-reg))))
 273   (:results (y))
 274   (:note "word integer argument move")
 275   (:generator 0
 276     (sc-case y
 277       ((signed-reg unsigned-reg)
 278        (move x y))
 279       ((signed-stack unsigned-stack)
 280        (storew x fp (tn-offset y))))))
 281 ;;;
 282 (define-move-vop move-word-argument :move-arg
 283   (descriptor-reg any-reg signed-reg unsigned-reg) (signed-reg unsigned-reg))
 284
 285
 286 ;;; Use standard MOVE-ARGUMENT + coercion to move an untagged number to a
 287 ;;; descriptor passing location.
 288 ;;;
 289 (define-move-vop move-argument :move-arg
 290   (signed-reg unsigned-reg) (any-reg descriptor-reg))