src/compiler/sparc/c-call.lisp

   1 ;;;; VOPs and other machine-specific support routines for call-out to C
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   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.
  11
  12 (in-package "SB!VM")
  13
  14 (defun my-make-wired-tn (prim-type-name sc-name offset)
  15   (make-wired-tn (primitive-type-or-lose prim-type-name)
  16                  (sc-number-or-lose sc-name)
  17                  offset))
  18
  19 (defstruct arg-state
  20   (register-args 0)
  21   ;; No matter what we have to allocate at least 7 stack frame slots.  One
  22   ;; because the C call convention requries it, and 6 because whoever we call
  23   ;; is going to expect to be able to save his 6 register arguments there.
  24   (stack-frame-size 7))
  25
  26 (defun int-arg (state prim-type reg-sc stack-sc)
  27   (let ((reg-args (arg-state-register-args state)))
  28     (cond ((< reg-args 6)
  29            (setf (arg-state-register-args state) (1+ reg-args))
  30            (my-make-wired-tn prim-type reg-sc (+ reg-args nl0-offset)))
  31           (t
  32            (let ((frame-size (arg-state-stack-frame-size state)))
  33              (setf (arg-state-stack-frame-size state) (1+ frame-size))
  34              (my-make-wired-tn prim-type stack-sc (+ frame-size 16)))))))
  35
  36 (define-alien-type-method (integer :arg-tn) (type state)
  37   (if (alien-integer-type-signed type)
  38       (int-arg state 'signed-byte-32 'signed-reg 'signed-stack)
  39       (int-arg state 'unsigned-byte-32 'unsigned-reg 'unsigned-stack)))
  40
  41 (define-alien-type-method (system-area-pointer :arg-tn) (type state)
  42   (declare (ignore type))
  43   (int-arg state 'system-area-pointer 'sap-reg 'sap-stack))
  44
  45 (defstruct result-state
  46   (num-results 0))
  47
  48 (defun result-reg-offset (slot)
  49   (ecase slot
  50     (0 nl0-offset)
  51     (1 nl1-offset)))
  52
  53 (define-alien-type-method (integer :result-tn) (type state)
  54   (let ((num-results (result-state-num-results state)))
  55     (setf (result-state-num-results state) (1+ num-results))
  56     (multiple-value-bind (ptype reg-sc)
  57         (if (alien-integer-type-signed type)
  58             (values 'signed-byte-32 'signed-reg)
  59             (values 'unsigned-byte-32 'unsigned-reg))
  60       (my-make-wired-tn ptype reg-sc (result-reg-offset num-results)))))
  61
  62 (define-alien-type-method (system-area-pointer :result-tn) (type state)
  63   (declare (ignore type))
  64   (let ((num-results (result-state-num-results state)))
  65     (setf (result-state-num-results state) (1+ num-results))
  66     (my-make-wired-tn 'system-area-pointer 'sap-reg
  67                       (result-reg-offset num-results))))
  68
  69 (define-alien-type-method (double-float :result-tn) (type state)
  70   (declare (ignore type state))
  71   (my-make-wired-tn 'double-float 'double-reg 0))
  72
  73 (define-alien-type-method (single-float :result-tn) (type state)
  74   (declare (ignore type state))
  75   (my-make-wired-tn 'single-float 'single-reg 0))
  76
  77 #!+long-float
  78 (define-alien-type-method (long-float :result-tn) (type)
  79   (declare (ignore type))
  80   (my-make-wired-tn 'long-float 'long-reg 0))
  81
  82 (define-alien-type-method (values :result-tn) (type state)
  83   (let ((values (alien-values-type-values type)))
  84     (when (> (length values) 2)
  85       (error "Too many result values from c-call."))
  86     (mapcar #'(lambda (type)
  87                 (invoke-alien-type-method :result-tn type state))
  88             values)))
  89
  90 (!def-vm-support-routine make-call-out-tns (type)
  91   (declare (type alien-fun-type type))
  92   (let ((arg-state (make-arg-state)))
  93     (collect ((arg-tns))
  94       (dolist (arg-type (alien-fun-type-arg-types type))
  95         (arg-tns (invoke-alien-type-method :arg-tn arg-type arg-state)))
  96       (values (my-make-wired-tn 'positive-fixnum 'any-reg nsp-offset)
  97               (* (arg-state-stack-frame-size arg-state) n-word-bytes)
  98               (arg-tns)
  99               (invoke-alien-type-method
 100                :result-tn
 101                (alien-fun-type-result-type type)
 102                (make-result-state))))))
 103
 104 (deftransform %alien-funcall ((function type &rest args))
 105   (aver (sb!c::constant-lvar-p type))
 106   (let* ((type (sb!c::lvar-value type))
 107          (arg-types (alien-fun-type-arg-types type))
 108          (result-type (alien-fun-type-result-type type)))
 109     (aver (= (length arg-types) (length args)))
 110     ;; We need to do something special for the following argument
 111     ;; types: single-float, double-float, and 64-bit integers.  For
 112     ;; results, we need something special for 64-bit integer results.
 113     (if (or (some #'alien-single-float-type-p arg-types)
 114             (some #'alien-double-float-type-p arg-types)
 115             (some #'(lambda (type)
 116                       (and (alien-integer-type-p type)
 117                            (> (sb!alien::alien-integer-type-bits type) 32)))
 118                   arg-types)
 119             #!+long-float (some #'alien-long-float-type-p arg-types)
 120             (and (alien-integer-type-p result-type)
 121                  (> (sb!alien::alien-integer-type-bits result-type) 32)))
 122         (collect ((new-args) (lambda-vars) (new-arg-types))
 123                  (dolist (type arg-types)
 124                    (let ((arg (gensym)))
 125                      (lambda-vars arg)
 126                      (cond ((and (alien-integer-type-p type)
 127                                  (> (sb!alien::alien-integer-type-bits type) 32))
 128                             ;; 64-bit long long types are stored in
 129                             ;; consecutive locations, most significant word
 130                             ;; first (big-endian).
 131                             (new-args `(ash ,arg -32))
 132                             (new-args `(logand ,arg #xffffffff))
 133                             (if (alien-integer-type-signed type)
 134                                 (new-arg-types (parse-alien-type '(signed 32) (sb!kernel:make-null-lexenv)))
 135                                 (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
 136                             (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
 137                            ((alien-single-float-type-p type)
 138                             (new-args `(single-float-bits ,arg))
 139                             (new-arg-types (parse-alien-type '(signed 32) (sb!kernel:make-null-lexenv))))
 140                            ((alien-double-float-type-p type)
 141                             (new-args `(double-float-high-bits ,arg))
 142                             (new-args `(double-float-low-bits ,arg))
 143                             (new-arg-types (parse-alien-type '(signed 32) (sb!kernel:make-null-lexenv)))
 144                             (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
 145                            #!+long-float
 146                            ((alien-long-float-type-p type)
 147                             (new-args `(long-float-exp-bits ,arg))
 148                             (new-args `(long-float-high-bits ,arg))
 149                             (new-args `(long-float-mid-bits ,arg))
 150                             (new-args `(long-float-low-bits ,arg))
 151                             (new-arg-types (parse-alien-type '(signed 32) (sb!kernel:make-null-lexenv)))
 152                             (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv)))
 153                             (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv)))
 154                             (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
 155                            (t
 156                             (new-args arg)
 157                             (new-arg-types type)))))
 158                  (cond ((and (alien-integer-type-p result-type)
 159                              (> (sb!alien::alien-integer-type-bits result-type) 32))
 160                         (let ((new-result-type
 161                                (let ((sb!alien::*values-type-okay* t))
 162                                  (parse-alien-type
 163                                   (if (alien-integer-type-signed result-type)
 164                                       '(values (signed 32) (unsigned 32))
 165                                       '(values (unsigned 32) (unsigned 32)))
 166                                   (sb!kernel:make-null-lexenv)))))
 167                           `(lambda (function type ,@(lambda-vars))
 168                             (declare (ignore type))
 169                             (multiple-value-bind (high low)
 170                                 (%alien-funcall function
 171                                                 ',(make-alien-fun-type
 172                                                    :arg-types (new-arg-types)
 173                                                    :result-type new-result-type)
 174                                                 ,@(new-args))
 175                               (logior low (ash high 32))))))
 176                        (t
 177                         `(lambda (function type ,@(lambda-vars))
 178                           (declare (ignore type))
 179                           (%alien-funcall function
 180                            ',(make-alien-fun-type
 181                               :arg-types (new-arg-types)
 182                               :result-type result-type)
 183                            ,@(new-args))))))
 184         (sb!c::give-up-ir1-transform))))
 185
 186 (define-vop (foreign-symbol-sap)
 187   (:translate foreign-symbol-sap)
 188   (:policy :fast-safe)
 189   (:args)
 190   (:arg-types (:constant simple-string))
 191   (:info foreign-symbol)
 192   (:results (res :scs (sap-reg)))
 193   (:result-types system-area-pointer)
 194   (:generator 2
 195     (inst li res (make-fixup foreign-symbol :foreign))))
 196
 197 #!+linkage-table
 198 (define-vop (foreign-symbol-dataref-sap)
 199   (:translate foreign-symbol-dataref-sap)
 200   (:policy :fast-safe)
 201   (:args)
 202   (:arg-types (:constant simple-string))
 203   (:info foreign-symbol)
 204   (:results (res :scs (sap-reg)))
 205   (:result-types system-area-pointer)
 206   (:temporary (:scs (non-descriptor-reg)) addr)
 207   (:generator 2
 208     (inst li addr (make-fixup foreign-symbol :foreign-dataref))
 209     (loadw res addr)))
 210
 211 (define-vop (call-out)
 212   (:args (function :scs (sap-reg) :target cfunc)
 213          (args :more t))
 214   (:results (results :more t))
 215   (:ignore args results)
 216   (:save-p t)
 217   (:temporary (:sc any-reg :offset cfunc-offset
 218                    :from (:argument 0) :to (:result 0)) cfunc)
 219   (:temporary (:sc interior-reg :offset lip-offset) lip)
 220   (:temporary (:scs (any-reg) :to (:result 0)) temp)
 221   (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save)
 222   (:vop-var vop)
 223   (:generator 0
 224     (let ((cur-nfp (current-nfp-tn vop)))
 225       (when cur-nfp
 226         (store-stack-tn nfp-save cur-nfp))
 227       (move cfunc function)
 228       (inst li temp (make-fixup "call_into_c" :foreign))
 229       (inst jal lip temp)
 230       (inst nop)
 231       (when cur-nfp
 232         (load-stack-tn cur-nfp nfp-save)))))
 233
 234
 235 (define-vop (alloc-number-stack-space)
 236   (:info amount)
 237   (:results (result :scs (sap-reg any-reg)))
 238   (:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
 239   (:generator 0
 240     (unless (zerop amount)
 241       (let ((delta (logandc2 (+ amount 7) 7)))
 242         (cond ((< delta (ash 1 12))
 243                (inst sub nsp-tn delta))
 244               (t
 245                (inst li temp delta)
 246                (inst sub nsp-tn temp)))))
 247     (unless (location= result nsp-tn)
 248       ;; They are only location= when the result tn was allocated by
 249       ;; make-call-out-tns above, which takes the number-stack-displacement
 250       ;; into account itself.
 251       (inst add result nsp-tn number-stack-displacement))))
 252
 253 (define-vop (dealloc-number-stack-space)
 254   (:info amount)
 255   (:policy :fast-safe)
 256   (:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
 257   (:generator 0
 258     (unless (zerop amount)
 259       (let ((delta (logandc2 (+ amount 7) 7)))
 260         (cond ((< delta (ash 1 12))
 261                (inst add nsp-tn delta))
 262               (t
 263                (inst li temp delta)
 264                (inst add nsp-tn temp)))))))