src/compiler/generic/primtype.lisp

   1 ;;;; machine-independent aspects of the object representation and
   2 ;;;; primitive types
   3
   4 ;;;; This software is part of the SBCL system. See the README file for
   5 ;;;; more information.
   6 ;;;;
   7 ;;;; This software is derived from the CMU CL system, which was
   8 ;;;; written at Carnegie Mellon University and released into the
   9 ;;;; public domain. The software is in the public domain and is
  10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  11 ;;;; files for more information.
  12
  13 (in-package "SB!VM")
  14 \f
  15 ;;;; primitive type definitions
  16
  17 (/show0 "primtype.lisp 17")
  18
  19 (!def-primitive-type t (descriptor-reg))
  20 (/show0 "primtype.lisp 20")
  21 (setf *backend-t-primitive-type* (primitive-type-or-lose t))
  22
  23 ;;; primitive integer types that fit in registers
  24 (/show0 "primtype.lisp 24")
  25 (!def-primitive-type positive-fixnum (any-reg signed-reg unsigned-reg)
  26   :type (unsigned-byte 29))
  27 (/show0 "primtype.lisp 27")
  28 #!-alpha
  29 (!def-primitive-type unsigned-byte-31 (signed-reg unsigned-reg descriptor-reg)
  30   :type (unsigned-byte 31))
  31 (/show0 "primtype.lisp 31")
  32 #!-alpha
  33 (!def-primitive-type unsigned-byte-32 (unsigned-reg descriptor-reg)
  34   :type (unsigned-byte 32))
  35 (/show0 "primtype.lisp 35")
  36 #!+alpha
  37 (!def-primitive-type unsigned-byte-63 (signed-reg unsigned-reg descriptor-reg)
  38   :type (unsigned-byte 63))
  39 #!+alpha
  40 (!def-primitive-type unsigned-byte-64 (unsigned-reg descriptor-reg)
  41   :type (unsigned-byte 64))
  42 (!def-primitive-type fixnum (any-reg signed-reg)
  43   :type (signed-byte 30))
  44 #!-alpha
  45 (!def-primitive-type signed-byte-32 (signed-reg descriptor-reg)
  46   :type (signed-byte 32))
  47 #!+alpha
  48 (!def-primitive-type signed-byte-64 (signed-reg descriptor-reg)
  49   :type (signed-byte 64))
  50
  51 (defvar *fixnum-primitive-type* (primitive-type-or-lose 'fixnum))
  52
  53 (/show0 "primtype.lisp 53")
  54 (!def-primitive-type-alias tagged-num (:or positive-fixnum fixnum))
  55 (!def-primitive-type-alias unsigned-num (:or #!-alpha unsigned-byte-32
  56                                              #!-alpha unsigned-byte-31
  57                                              #!+alpha unsigned-byte-64
  58                                              #!+alpha unsigned-byte-63
  59                                              positive-fixnum))
  60 (!def-primitive-type-alias signed-num (:or #!-alpha signed-byte-32
  61                                            #!+alpha signed-byte-64
  62                                            fixnum
  63                                            #!-alpha unsigned-byte-31
  64                                            #!+alpha unsigned-byte-63
  65                                            positive-fixnum))
  66
  67 ;;; other primitive immediate types
  68 (/show0 "primtype.lisp 68")
  69 (!def-primitive-type base-char (base-char-reg any-reg))
  70
  71 ;;; primitive pointer types
  72 (/show0 "primtype.lisp 73")
  73 (!def-primitive-type function (descriptor-reg))
  74 (!def-primitive-type list (descriptor-reg))
  75 (!def-primitive-type instance (descriptor-reg))
  76
  77 (/show0 "primtype.lisp 77")
  78 (!def-primitive-type funcallable-instance (descriptor-reg))
  79
  80 ;;; primitive other-pointer number types
  81 (/show0 "primtype.lisp 81")
  82 (!def-primitive-type bignum (descriptor-reg))
  83 (!def-primitive-type ratio (descriptor-reg))
  84 (!def-primitive-type complex (descriptor-reg))
  85 (/show0 "about to !DEF-PRIMITIVE-TYPE SINGLE-FLOAT")
  86 (!def-primitive-type single-float (single-reg descriptor-reg))
  87 (/show0 "about to !DEF-PRIMITIVE-TYPE DOUBLE-FLOAT")
  88 (!def-primitive-type double-float (double-reg descriptor-reg))
  89
  90 (/show0 "about to !DEF-PRIMITIVE-TYPE COMPLEX-SINGLE-FLOAT")
  91 (!def-primitive-type complex-single-float (complex-single-reg descriptor-reg)
  92   :type (complex single-float))
  93 (/show0 "about to !DEF-PRIMITIVE-TYPE COMPLEX-DOUBLE-FLOAT")
  94 (!def-primitive-type complex-double-float (complex-double-reg descriptor-reg)
  95   :type (complex double-float))
  96
  97
  98 ;;; primitive other-pointer array types
  99 (/show0 "primtype.lisp 96")
 100 (macrolet ((define-simple-array-primitive-types ()
 101                `(progn
 102                  ,@(map 'list
 103                         (lambda (saetp)
 104                           `(!def-primitive-type
 105                             ,(saetp-primitive-type-name saetp)
 106                             (descriptor-reg)
 107                             :type (simple-array ,(saetp-specifier saetp) (*))))
 108                         *specialized-array-element-type-properties*))))
 109   (define-simple-array-primitive-types))
 110 ;;; Note: The complex array types are not included, 'cause it is
 111 ;;; pointless to restrict VOPs to them.
 112
 113 ;;; other primitive other-pointer types
 114 (!def-primitive-type system-area-pointer (sap-reg descriptor-reg))
 115 (!def-primitive-type weak-pointer (descriptor-reg))
 116
 117 ;;; miscellaneous primitive types that don't exist at the LISP level
 118 (!def-primitive-type catch-block (catch-block) :type nil)
 119 \f
 120 ;;;; PRIMITIVE-TYPE-OF and friends
 121
 122 ;;; Return the most restrictive primitive type that contains OBJECT.
 123 (/show0 "primtype.lisp 147")
 124 (!def-vm-support-routine primitive-type-of (object)
 125   (let ((type (ctype-of object)))
 126     (cond ((not (member-type-p type)) (primitive-type type))
 127           ((equal (member-type-members type) '(nil))
 128            (primitive-type-or-lose 'list))
 129           (t
 130            *backend-t-primitive-type*))))
 131
 132 ;;; Return the primitive type corresponding to a type descriptor
 133 ;;; structure. The second value is true when the primitive type is
 134 ;;; exactly equivalent to the argument Lisp type.
 135 ;;;
 136 ;;; In a bootstrapping situation, we should be careful to use the
 137 ;;; correct values for the system parameters.
 138 ;;;
 139 ;;; We need an aux function because we need to use both
 140 ;;; !DEF-VM-SUPPORT-ROUTINE and DEFUN-CACHED.
 141 (/show0 "primtype.lisp 188")
 142 (!def-vm-support-routine primitive-type (type)
 143   (primitive-type-aux type))
 144 (/show0 "primtype.lisp 191")
 145 (defun-cached (primitive-type-aux
 146                :hash-function (lambda (x)
 147                                 (logand (type-hash-value x) #x1FF))
 148                :hash-bits 9
 149                :values 2
 150                :default (values nil :empty))
 151               ((type eq))
 152   (declare (type ctype type))
 153   (macrolet ((any () '(values *backend-t-primitive-type* nil))
 154              (exactly (type)
 155                `(values (primitive-type-or-lose ',type) t))
 156              (part-of (type)
 157                `(values (primitive-type-or-lose ',type) nil)))
 158     (flet ((maybe-numeric-type-union (t1 t2)
 159              (let ((t1-name (primitive-type-name t1))
 160                    (t2-name (primitive-type-name t2)))
 161                (case t1-name
 162                  (positive-fixnum
 163                   (if (or (eq t2-name 'fixnum)
 164                           (eq t2-name #!-alpha 'signed-byte-32
 165                                       #!+alpha 'signed-byte-64)
 166                           (eq t2-name #!-alpha 'unsigned-byte-31
 167                                       #!+alpha 'unsigned-byte-63)
 168                           (eq t2-name #!-alpha 'unsigned-byte-32
 169                                       #!+alpha 'unsigned-byte-64))
 170                       t2))
 171                  (fixnum
 172                   (case t2-name
 173                     (#!-alpha signed-byte-32
 174                      #!+alpha signed-byte-64 t2)
 175                     (#!-alpha unsigned-byte-31
 176                      #!+alpha unsigned-byte-63
 177                      (primitive-type-or-lose
 178                       #!-alpha 'signed-byte-32
 179                       #!+alpha 'signed-byte-64))))
 180                  (#!-alpha signed-byte-32
 181                   #!+alpha signed-byte-64
 182                   (if (eq t2-name #!-alpha 'unsigned-byte-31
 183                                   #!+alpha 'unsigned-byte-63)
 184                       t1))
 185                  (#!-alpha unsigned-byte-31
 186                   #!+alpha unsigned-byte-63
 187                   (if (eq t2-name #!-alpha 'unsigned-byte-32
 188                                   #!+alpha 'unsigned-byte-64)
 189                       t2))))))
 190       (etypecase type
 191         (numeric-type
 192          (let ((lo (numeric-type-low type))
 193                (hi (numeric-type-high type)))
 194            (case (numeric-type-complexp type)
 195              (:real
 196               (case (numeric-type-class type)
 197                 (integer
 198                  (cond ((and hi lo)
 199                         (dolist (spec
 200                                   `((positive-fixnum 0 ,(1- (ash 1 29)))
 201                                     #!-alpha
 202                                     (unsigned-byte-31 0 ,(1- (ash 1 31)))
 203                                     #!-alpha
 204                                     (unsigned-byte-32 0 ,(1- (ash 1 32)))
 205                                     #!+alpha
 206                                     (unsigned-byte-63 0 ,(1- (ash 1 63)))
 207                                     #!+alpha
 208                                     (unsigned-byte-64 0 ,(1- (ash 1 64)))
 209                                     (fixnum ,(ash -1 29)
 210                                             ,(1- (ash 1 29)))
 211                                     #!-alpha
 212                                     (signed-byte-32 ,(ash -1 31)
 213                                                           ,(1- (ash 1 31)))
 214                                     #!+alpha
 215                                     (signed-byte-64 ,(ash -1 63)
 216                                                     ,(1- (ash 1 63))))
 217                                  (if (or (< hi (ash -1 29))
 218                                          (> lo (1- (ash 1 29))))
 219                                      (part-of bignum)
 220                                      (any)))
 221                           (let ((type (car spec))
 222                                 (min (cadr spec))
 223                                 (max (caddr spec)))
 224                             (when (<= min lo hi max)
 225                               (return (values
 226                                        (primitive-type-or-lose type)
 227                                        (and (= lo min) (= hi max))))))))
 228                        ((or (and hi (< hi sb!xc:most-negative-fixnum))
 229                             (and lo (> lo sb!xc:most-positive-fixnum)))
 230                         (part-of bignum))
 231                        (t
 232                         (any))))
 233                 (float
 234                  (let ((exact (and (null lo) (null hi))))
 235                    (case (numeric-type-format type)
 236                      ((short-float single-float)
 237                       (values (primitive-type-or-lose 'single-float)
 238                               exact))
 239                      ((double-float)
 240                       (values (primitive-type-or-lose 'double-float)
 241                               exact))
 242                      (t
 243                       (any)))))
 244                 (t
 245                  (any))))
 246              (:complex
 247               (if (eq (numeric-type-class type) 'float)
 248                   (let ((exact (and (null lo) (null hi))))
 249                     (case (numeric-type-format type)
 250                       ((short-float single-float)
 251                        (values (primitive-type-or-lose 'complex-single-float)
 252                                exact))
 253                       ((double-float long-float)
 254                        (values (primitive-type-or-lose 'complex-double-float)
 255                                exact))
 256                       (t
 257                        (part-of complex))))
 258                   (part-of complex)))
 259              (t
 260               (any)))))
 261         (array-type
 262          (if (array-type-complexp type)
 263              (any)
 264              (let* ((dims (array-type-dimensions type))
 265                     (etype (array-type-specialized-element-type type))
 266                     (type-spec (type-specifier etype))
 267                     ;; FIXME: We're _WHAT_?  Testing for type equality
 268                     ;; with a specifier and #'EQUAL?  *BOGGLE*.  --
 269                     ;; CSR, 2003-06-24
 270                     (ptype (cdr (assoc type-spec *simple-array-primitive-types*
 271                                        :test #'equal))))
 272                (if (and (consp dims) (null (rest dims)) ptype)
 273                    (values (primitive-type-or-lose ptype)
 274                            (eq (first dims) '*))
 275                    (any)))))
 276         (union-type
 277          (if (type= type (specifier-type 'list))
 278              (exactly list)
 279              (let ((types (union-type-types type)))
 280                (multiple-value-bind (res exact) (primitive-type (first types))
 281                  (dolist (type (rest types) (values res exact))
 282                    (multiple-value-bind (ptype ptype-exact)
 283                        (primitive-type type)
 284                      (unless ptype-exact (setq exact nil))
 285                      (unless (eq ptype res)
 286                        (let ((new-ptype
 287                               (or (maybe-numeric-type-union res ptype)
 288                                   (maybe-numeric-type-union ptype res))))
 289                          (if new-ptype
 290                              (setq res new-ptype)
 291                              (return (any)))))))))))
 292         (member-type
 293          (let* ((members (member-type-members type))
 294                 (res (primitive-type-of (first members))))
 295            (dolist (mem (rest members) (values res nil))
 296              (let ((ptype (primitive-type-of mem)))
 297                (unless (eq ptype res)
 298                  (let ((new-ptype (or (maybe-numeric-type-union res ptype)
 299                                       (maybe-numeric-type-union ptype res))))
 300                    (if new-ptype
 301                        (setq res new-ptype)
 302                        (return (any)))))))))
 303         (named-type
 304          (ecase (named-type-name type)
 305            ((t *) (values *backend-t-primitive-type* t))
 306            ((nil) (any))))
 307         (built-in-classoid
 308          (case (classoid-name type)
 309            ((complex function instance
 310              system-area-pointer weak-pointer)
 311             (values (primitive-type-or-lose (classoid-name type)) t))
 312            (funcallable-instance
 313             (part-of function))
 314            (base-char
 315             (exactly base-char))
 316            (cons-type
 317             (part-of list))
 318            (t
 319             (any))))
 320         (fun-type
 321          (exactly function))
 322         (classoid
 323          (if (csubtypep type (specifier-type 'function))
 324              (part-of function)
 325              (part-of instance)))
 326         (ctype
 327          (if (csubtypep type (specifier-type 'function))
 328              (part-of function)
 329              (any)))))))
 330
 331 (/show0 "primtype.lisp end of file")