1 ;;;; This file contains the implementation-independent facilities used
2 ;;;; for defining the compiler's interface to the VM in a given
3 ;;;; implementation that are needed at meta-compile time. They are
4 ;;;; separated out from vmdef.lisp so that they can be compiled and
5 ;;;; loaded without trashing the running compiler.
7 ;;;; FIXME: The "trashing the running [CMU CL] compiler" motivation no
8 ;;;; longer makes sense in SBCL, since we can cross-compile cleanly.
10 ;;;; This software is part of the SBCL system. See the README file for
11 ;;;; more information.
13 ;;;; This software is derived from the CMU CL system, which was
14 ;;;; written at Carnegie Mellon University and released into the
15 ;;;; public domain. The software is in the public domain and is
16 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
17 ;;;; files for more information.
21 ;;;; storage class and storage base definition
23 ;;; Define a storage base having the specified NAME. KIND may be :FINITE,
24 ;;; :UNBOUNDED or :NON-PACKED. The following keywords are legal:
25 ;;; :SIZE specifies the number of locations in a :FINITE SB or
26 ;;; the initial size of an :UNBOUNDED SB.
28 ;;; We enter the basic structure at meta-compile time, and then fill
29 ;;; in the missing slots at load time.
30 (defmacro define-storage-base
(name kind
&key size
(size-increment size
)
33 (declare (type symbol name
))
34 (declare (type (member :finite
:unbounded
:non-packed
) kind
))
36 ;; SIZE is either mandatory or forbidden.
40 (error "A size specification is meaningless in a ~S SB." kind
)))
42 (unless size
(error "Size is not specified in a ~S SB." kind
))
43 (aver (typep size
'unsigned-byte
))
44 (aver (= 1 (logcount size-alignment
)))
45 (aver (not (logtest size
(1- size-alignment
))))
46 (aver (not (logtest size-increment
(1- size-alignment
))))))
48 (let ((sb (if (eq kind
:non-packed
)
49 (make-sb :name name
:kind kind
)
50 (make-finite-sb :name name
:kind kind
:size size
51 :size-increment size-increment
52 :size-alignment size-alignment
))))
54 (/show0
"in DEFINE-STORAGE-BASE")
55 ;; DEFINE-STORAGE-CLASS need the storage bases while building
56 ;; the cross-compiler, but to eval this during cross-compilation
57 ;; would kill the cross-compiler.
58 (eval-when (#-sb-xc
:compile-toplevel
:load-toplevel
:execute
)
59 (let ((sb (,(if (eq kind
:non-packed
) 'copy-sb
'copy-finite-sb
)
61 (setf *backend-sb-list
*
62 (cons sb
(remove ',name
*backend-sb-list
* :key
#'sb-name
)))))
63 ,@(unless (eq kind
:non-packed
)
64 `((let ((res (sb-or-lose ',name
)))
65 (/show0
"not :NON-PACKED, i.e. hairy case")
66 (setf (finite-sb-always-live res
)
67 (make-array ',size
:initial-element
#*))
68 (/show0
"doing second SETF")
69 (setf (finite-sb-conflicts res
)
70 (make-array ',size
:initial-element
'#()))
71 (/show0
"doing third SETF")
72 (setf (finite-sb-live-tns res
)
73 (make-array ',size
:initial-element nil
))
74 (/show0
"doing fourth SETF")
75 (setf (finite-sb-always-live-count res
)
76 (make-array ',size
:initial-element
0)))))
77 (/show0
"finished with DEFINE-STORAGE-BASE expansion")
80 ;;; Define a storage class NAME that uses the named Storage-Base.
81 ;;; NUMBER is a small, non-negative integer that is used as an alias.
82 ;;; The following keywords are defined:
84 ;;; :ELEMENT-SIZE Size
85 ;;; The size of objects in this SC in whatever units the SB uses.
86 ;;; This defaults to 1.
89 ;;; The alignment restrictions for this SC. TNs will only be
90 ;;; allocated at offsets that are an even multiple of this number.
91 ;;; This defaults to 1.
93 ;;; :LOCATIONS (Location*)
94 ;;; If the SB is :FINITE, then this is a list of the offsets within
95 ;;; the SB that are in this SC.
97 ;;; :RESERVE-LOCATIONS (Location*)
98 ;;; A subset of the Locations that the register allocator should try to
99 ;;; reserve for operand loading (instead of to hold variable values.)
101 ;;; :SAVE-P {T | NIL}
102 ;;; If T, then values stored in this SC must be saved in one of the
103 ;;; non-save-p :ALTERNATE-SCs across calls.
105 ;;; :ALTERNATE-SCS (SC*)
106 ;;; Indicates other SCs that can be used to hold values from this SC across
107 ;;; calls or when storage in this SC is exhausted. The SCs should be
108 ;;; specified in order of decreasing \"goodness\". There must be at least
109 ;;; one SC in an unbounded SB, unless this SC is only used for restricted or
112 ;;; :CONSTANT-SCS (SC*)
113 ;;; A list of the names of all the constant SCs that can be loaded into this
114 ;;; SC by a move function.
115 (defmacro define-storage-class
(name number sb-name
&key
(element-size '1)
116 (alignment '1) locations reserve-locations
117 save-p alternate-scs constant-scs
)
118 (declare (type symbol name
))
119 (declare (type sc-number number
))
120 (declare (type symbol sb-name
))
121 (declare (type list locations reserve-locations alternate-scs constant-scs
))
122 (declare (type boolean save-p
))
123 (unless (= (logcount alignment
) 1)
124 (error "alignment not a power of two: ~W" alignment
))
126 (let ((sb (sb-or-lose sb-name
)))
127 (if (eq (sb-kind sb
) :finite
)
128 (let ((size (sb-size sb
))
129 (element-size (eval element-size
)))
130 (declare (type unsigned-byte element-size
))
131 (dolist (el locations
)
132 (declare (type unsigned-byte el
))
133 (unless (<= 1 (+ el element-size
) size
)
134 (error "SC element ~W out of bounds for ~S" el sb
))))
136 (error ":LOCATIONS is meaningless in a ~S SB." (sb-kind sb
))))
138 (unless (subsetp reserve-locations locations
)
139 (error "RESERVE-LOCATIONS not a subset of LOCATIONS."))
141 (when (and (or alternate-scs constant-scs
)
142 (eq (sb-kind sb
) :non-packed
))
144 "It's meaningless to specify alternate or constant SCs in a ~S SB."
148 (if (or (eq sb-name
'non-descriptor-stack
)
149 (find 'non-descriptor-stack
150 (mapcar #'sc-or-lose alternate-scs
)
152 (sb-name (sc-sb x
)))))
155 (eval-when (#-sb-xc
:compile-toplevel
:load-toplevel
:execute
)
156 (let ((res (make-sc :name
',name
:number
',number
157 :sb
(sb-or-lose ',sb-name
)
158 :element-size
,element-size
159 :alignment
,alignment
160 :locations
',locations
161 :reserve-locations
',reserve-locations
163 :number-stack-p
,nstack-p
164 :alternate-scs
(mapcar #'sc-or-lose
166 :constant-scs
(mapcar #'sc-or-lose
168 (setf (gethash ',name
*backend-sc-names
*) res
)
169 (setf (svref (sc-load-costs res
) ',number
) 0)))
171 (let ((old (svref *backend-sc-numbers
* ',number
)))
172 (when (and old
(not (eq (sc-name old
) ',name
)))
173 (warn "redefining SC number ~W from ~S to ~S" ',number
174 (sc-name old
) ',name
)))
176 (setf (svref *backend-sc-numbers
* ',number
) (sc-or-lose ',name
))
177 (setf (gethash ',name
*backend-sc-names
*) (sc-or-lose ',name
))
178 (setf (sc-sb (sc-or-lose ',name
)) (sb-or-lose ',sb-name
))
181 ;;;; move/coerce definition
183 ;;; Given a list of pairs of lists of SCs (as given to DEFINE-MOVE-VOP,
184 ;;; etc.), bind TO-SC and FROM-SC to all the combinations.
185 (defmacro do-sc-pairs
((from-sc-var to-sc-var scs
) &body body
)
186 `(do ((froms ,scs
(cddr froms
))
187 (tos (cdr ,scs
) (cddr tos
)))
189 (dolist (from (car froms
))
190 (let ((,from-sc-var
(sc-or-lose from
)))
191 (dolist (to (car tos
))
192 (let ((,to-sc-var
(sc-or-lose to
)))
195 ;;; Define the function NAME and note it as the function used for
196 ;;; moving operands from the From-SCs to the To-SCs. Cost is the cost
197 ;;; of this move operation. The function is called with three
198 ;;; arguments: the VOP (for context), and the source and destination
199 ;;; TNs. An ASSEMBLE form is wrapped around the body. All uses of
200 ;;; DEFINE-MOVE-FUN should be compiled before any uses of
202 (defmacro define-move-fun
((name cost
) lambda-list scs
&body body
)
203 (declare (type index cost
))
204 (when (or (oddp (length scs
)) (null scs
))
205 (error "malformed SCs spec: ~S" scs
))
207 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
208 (do-sc-pairs (from-sc to-sc
',scs
)
209 (unless (eq from-sc to-sc
)
210 (let ((num (sc-number from-sc
)))
211 (setf (svref (sc-move-funs to-sc
) num
) ',name
)
212 (setf (svref (sc-load-costs to-sc
) num
) ',cost
)))))
214 (defun ,name
,lambda-list
215 (sb!assem
:assemble
(*code-segment
* ,(first lambda-list
))
218 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
219 (defparameter *sc-vop-slots
*
220 '((:move . sc-move-vops
)
221 (:move-arg . sc-move-arg-vops
))))
223 ;;; Make NAME be the VOP used to move values in the specified FROM-SCs
224 ;;; to the representation of the TO-SCs of each SC pair in SCS.
226 ;;; If KIND is :MOVE-ARG, then the VOP takes an extra argument,
227 ;;; which is the frame pointer of the frame to move into.
229 ;;; We record the VOP and costs for all SCs that we can move between
230 ;;; (including implicit loading).
231 (defmacro define-move-vop
(name kind
&rest scs
)
232 (when (or (oddp (length scs
)) (null scs
))
233 (error "malformed SCs spec: ~S" scs
))
234 (let ((accessor (or (cdr (assoc kind
*sc-vop-slots
*))
235 (error "unknown kind ~S" kind
))))
237 ,@(when (eq kind
:move
)
238 `((eval-when (:compile-toplevel
:load-toplevel
:execute
)
239 (do-sc-pairs (from-sc to-sc
',scs
)
240 (compute-move-costs from-sc to-sc
242 (vop-parse-or-lose name
)))))))
244 (let ((vop (template-or-lose ',name
)))
245 (do-sc-pairs (from-sc to-sc
',scs
)
246 (dolist (dest-sc (cons to-sc
(sc-alternate-scs to-sc
)))
247 (let ((vec (,accessor dest-sc
)))
248 (let ((scn (sc-number from-sc
)))
249 (setf (svref vec scn
)
250 (adjoin-template vop
(svref vec scn
))))
251 (dolist (sc (append (sc-alternate-scs from-sc
)
252 (sc-constant-scs from-sc
)))
253 (let ((scn (sc-number sc
)))
254 (setf (svref vec scn
)
255 (adjoin-template vop
(svref vec scn
))))))))))))
257 ;;;; primitive type definition
259 ;;; Define a primitive type NAME. Each SCS entry specifies a storage
260 ;;; class that values of this type may be allocated in. TYPE is the
261 ;;; type descriptor for the Lisp type that is equivalent to this type.
262 (defmacro !def-primitive-type
(name scs
&key
(type name
))
263 (declare (type symbol name
) (type list scs
))
264 (let ((scns (mapcar #'sc-number-or-lose scs
)))
266 (/show0
"doing !DEF-PRIMITIVE-TYPE, NAME=..")
267 (/primitive-print
,(symbol-name name
))
268 (assert (not (gethash ',name
*backend-primitive-type-names
*)))
269 (setf (gethash ',name
*backend-primitive-type-names
*)
270 (make-primitive-type :name
',name
273 (/show0
"done with !DEF-PRIMITIVE-TYPE")
276 ;;; Define NAME to be an alias for RESULT in VOP operand type restrictions.
277 (defmacro !def-primitive-type-alias
(name result
)
278 ;; Just record the translation.
280 (assert (not (assoc ',name
*backend-primitive-type-aliases
*)))
281 (push (cons ',name
,result
) *backend-primitive-type-aliases
*)
284 (defparameter *primitive-type-slot-alist
*
285 '((:check . primitive-type-check
)))
287 ;;; Primitive-Type-VOP Vop (Kind*) Type*
289 ;;; Annotate all the specified primitive Types with the named VOP
290 ;;; under each of the specified kinds:
293 ;;; A one-argument one-result VOP that moves the argument to the
294 ;;; result, checking that the value is of this type in the process.
295 (defmacro primitive-type-vop
(vop kinds
&rest types
)
296 (let ((n-vop (gensym))
298 `(let ((,n-vop
(template-or-lose ',vop
)))
301 `(let ((,n-type
(primitive-type-or-lose ',type
)))
304 (let ((slot (or (cdr (assoc kind
305 *primitive-type-slot-alist
*))
306 (error "unknown kind: ~S" kind
))))
307 `(setf (,slot
,n-type
) ,n-vop
)))
313 ;;;; VOP definition structures
315 ;;;; DEFINE-VOP uses some fairly complex data structures at
316 ;;;; meta-compile time, both to hold the results of parsing the
317 ;;;; elaborate syntax and to retain the information so that it can be
318 ;;;; inherited by other VOPs.
320 ;;; A VOP-PARSE object holds everything we need to know about a VOP at
321 ;;; meta-compile time.
322 (def!struct
(vop-parse
323 (:make-load-form-fun just-dump-it-normally
)
324 #-sb-xc-host
(:pure t
))
325 ;; the name of this VOP
326 (name nil
:type symbol
)
327 ;; If true, then the name of the VOP we inherit from.
328 (inherits nil
:type
(or symbol null
))
329 ;; lists of OPERAND-PARSE structures describing the arguments,
330 ;; results and temporaries of the VOP
331 (args nil
:type list
)
332 (results nil
:type list
)
333 (temps nil
:type list
)
334 ;; OPERAND-PARSE structures containing information about more args
335 ;; and results. If null, then there there are no more operands of
337 (more-args nil
:type
(or operand-parse null
))
338 (more-results nil
:type
(or operand-parse null
))
339 ;; a list of all the above together
340 (operands nil
:type list
)
341 ;; names of variables that should be declared IGNORE
342 (ignores () :type list
)
343 ;; true if this is a :CONDITIONAL VOP. T if a branchful VOP,
344 ;; a list of condition descriptor otherwise. See $ARCH/pred.lisp
345 ;; for more information.
347 ;; argument and result primitive types. These are pulled out of the
348 ;; operands, since we often want to change them without respecifying
350 (arg-types :unspecified
:type
(or (member :unspecified
) list
))
351 (result-types :unspecified
:type
(or (member :unspecified
) list
))
352 ;; the guard expression specified, or NIL if none
354 ;; the cost of and body code for the generator
355 (cost 0 :type unsigned-byte
)
356 (body :unspecified
:type
(or (member :unspecified
) list
))
357 ;; info for VOP variants. The list of forms to be evaluated to get
358 ;; the variant args for this VOP, and the list of variables to be
359 ;; bound to the variant args.
360 (variant () :type list
)
361 (variant-vars () :type list
)
362 ;; variables bound to the VOP and Vop-Node when in the generator body
363 (vop-var '.vop.
:type symbol
)
364 (node-var nil
:type
(or symbol null
))
365 ;; a list of the names of the codegen-info arguments to this VOP
366 (info-args () :type list
)
367 ;; an efficiency note associated with this VOP
368 (note nil
:type
(or string null
))
369 ;; a list of the names of the Effects and Affected attributes for
371 (effects '#1=(any) :type list
)
372 (affected '#1# :type list
)
373 ;; a list of the names of functions this VOP is a translation of and
374 ;; the policy that allows this translation to be done. :FAST is a
375 ;; safe default, since it isn't a safe policy.
376 (translate () :type list
)
377 (ltn-policy :fast
:type ltn-policy
)
378 ;; stuff used by life analysis
379 (save-p nil
:type
(member t nil
:compute-only
:force-to-stack
))
380 ;; info about how to emit MOVE-ARG VOPs for the &MORE operand in
382 (move-args nil
:type
(member nil
:local-call
:full-call
:known-return
)))
383 (defprinter (vop-parse)
385 (inherits :test inherits
)
389 (more-args :test more-args
)
390 (more-results :test more-results
)
391 (conditional-p :test conditional-p
)
397 (variant :test variant
)
398 (variant-vars :test variant-vars
)
399 (info-args :test info-args
)
405 (save-p :test save-p
)
406 (move-args :test move-args
))
408 ;;; An OPERAND-PARSE object contains stuff we need to know about an
409 ;;; operand or temporary at meta-compile time. Besides the obvious
410 ;;; stuff, we also store the names of per-operand temporaries here.
411 (def!struct
(operand-parse
412 (:make-load-form-fun just-dump-it-normally
)
413 #-sb-xc-host
(:pure t
))
414 ;; name of the operand (which we bind to the TN)
415 (name nil
:type symbol
)
416 ;; the way this operand is used:
418 :type
(member :argument
:result
:temporary
419 :more-argument
:more-result
))
420 ;; If true, the name of an operand that this operand is targeted to.
421 ;; This is only meaningful in :ARGUMENT and :TEMPORARY operands.
422 (target nil
:type
(or symbol null
))
423 ;; TEMP is a temporary that holds the TN-REF for this operand.
424 (temp (make-operand-parse-temp) :type symbol
)
425 ;; the time that this operand is first live and the time at which it
426 ;; becomes dead again. These are TIME-SPECs, as returned by
430 ;; a list of the names of the SCs that this operand is allowed into.
431 ;; If false, there is no restriction.
433 ;; Variable that is bound to the load TN allocated for this operand, or to
434 ;; NIL if no load-TN was allocated.
435 (load-tn (make-operand-parse-load-tn) :type symbol
)
436 ;; an expression that tests whether to do automatic operand loading
438 ;; In a wired or restricted temporary this is the SC the TN is to be
439 ;; packed in. Null otherwise.
440 (sc nil
:type
(or symbol null
))
441 ;; If non-null, we are a temp wired to this offset in SC.
442 (offset nil
:type
(or unsigned-byte null
)))
443 (defprinter (operand-parse)
446 (target :test target
)
452 (offset :test offset
))
454 ;;;; miscellaneous utilities
456 ;;; Find the operand or temporary with the specifed Name in the VOP
457 ;;; Parse. If there is no such operand, signal an error. Also error if
458 ;;; the operand kind isn't one of the specified Kinds. If Error-P is
459 ;;; NIL, just return NIL if there is no such operand.
460 (defun find-operand (name parse
&optional
461 (kinds '(:argument
:result
:temporary
))
463 (declare (symbol name
) (type vop-parse parse
) (list kinds
))
464 (let ((found (find name
(vop-parse-operands parse
)
465 :key
#'operand-parse-name
)))
467 (unless (member (operand-parse-kind found
) kinds
)
468 (error "Operand ~S isn't one of these kinds: ~S." name kinds
))
470 (error "~S is not an operand to ~S." name
(vop-parse-name parse
))))
473 ;;; Get the VOP-PARSE structure for NAME or die trying. For all
474 ;;; meta-compile time uses, the VOP-PARSE should be used instead of
476 (defun vop-parse-or-lose (name)
478 (or (gethash name
*backend-parsed-vops
*)
479 (error "~S is not the name of a defined VOP." name
))))
481 ;;; Return a list of LET-forms to parse a TN-REF list into the temps
482 ;;; specified by the operand-parse structures. MORE-OPERAND is the
483 ;;; OPERAND-PARSE describing any more operand, or NIL if none. REFS is
484 ;;; an expression that evaluates into the first TN-REF.
485 (defun access-operands (operands more-operand refs
)
486 (declare (list operands
))
489 (dolist (op operands
)
490 (let ((n-ref (operand-parse-temp op
)))
491 (res `(,n-ref
,prev
))
492 (setq prev
`(tn-ref-across ,n-ref
))))
495 (res `(,(operand-parse-name more-operand
) ,prev
))))
498 ;;; This is used with ACCESS-OPERANDS to prevent warnings for TN-REF
499 ;;; temps not used by some particular function. It returns the name of
500 ;;; the last operand, or NIL if OPERANDS is NIL.
501 (defun ignore-unreferenced-temps (operands)
503 (operand-parse-temp (car (last operands
)))))
505 ;;; Grab an arg out of a VOP spec, checking the type and syntax and stuff.
506 (defun vop-spec-arg (spec type
&optional
(n 1) (last t
))
507 (let ((len (length spec
)))
509 (error "~:R argument missing: ~S" n spec
))
510 (when (and last
(> len
(1+ n
)))
511 (error "extra junk at end of ~S" spec
))
512 (let ((thing (elt spec n
)))
513 (unless (typep thing type
)
514 (error "~:R argument is not a ~S: ~S" n type spec
))
519 ;;; Return a time spec describing a time during the evaluation of a
520 ;;; VOP, used to delimit operand and temporary lifetimes. The
521 ;;; representation is a cons whose CAR is the number of the evaluation
522 ;;; phase and the CDR is the sub-phase. The sub-phase is 0 in the
523 ;;; :LOAD and :SAVE phases.
524 (defun parse-time-spec (spec)
525 (let ((dspec (if (atom spec
) (list spec
0) spec
)))
526 (unless (and (= (length dspec
) 2)
527 (typep (second dspec
) 'unsigned-byte
))
528 (error "malformed time specifier: ~S" spec
))
530 (cons (case (first dspec
)
537 (error "unknown phase in time specifier: ~S" spec
)))
540 ;;; Return true if the time spec X is the same or later time than Y.
541 (defun time-spec-order (x y
)
542 (or (> (car x
) (car y
))
543 (and (= (car x
) (car y
))
544 (>= (cdr x
) (cdr y
)))))
546 ;;;; generation of emit functions
548 (defun compute-temporaries-description (parse)
549 (let ((temps (vop-parse-temps parse
))
550 (element-type '(unsigned-byte 16)))
552 (let ((results (!make-specialized-array
(length temps
) element-type
))
555 (declare (type operand-parse temp
))
556 (let ((sc (operand-parse-sc temp
))
557 (offset (operand-parse-offset temp
)))
559 (setf (aref results index
)
561 (+ (ash offset
(1+ sc-bits
))
562 (ash (sc-number-or-lose sc
) 1)
564 (ash (sc-number-or-lose sc
) 1))))
568 (defun compute-ref-ordering (parse)
569 (let* ((num-args (+ (length (vop-parse-args parse
))
570 (if (vop-parse-more-args parse
) 1 0)))
571 (num-results (+ (length (vop-parse-results parse
))
572 (if (vop-parse-more-results parse
) 1 0)))
574 (collect ((refs) (targets))
575 (dolist (op (vop-parse-operands parse
))
576 (when (operand-parse-target op
)
577 (unless (member (operand-parse-kind op
) '(:argument
:temporary
))
578 (error "cannot target a ~S operand: ~S" (operand-parse-kind op
)
579 (operand-parse-name op
)))
580 (let ((target (find-operand (operand-parse-target op
) parse
581 '(:temporary
:result
))))
582 ;; KLUDGE: These formulas must be consistent with those in
583 ;; EMIT-VOP, and this is currently maintained by
584 ;; hand. -- WHN 2002-01-30, paraphrasing APD
585 (targets (+ (* index max-vop-tn-refs
)
586 (ecase (operand-parse-kind target
)
588 (+ (position-or-lose target
589 (vop-parse-results parse
))
592 (+ (* (position-or-lose target
593 (vop-parse-temps parse
))
598 (let ((born (operand-parse-born op
))
599 (dies (operand-parse-dies op
)))
600 (ecase (operand-parse-kind op
)
602 (refs (cons (cons dies nil
) index
)))
604 (refs (cons (cons dies nil
) index
)))
606 (refs (cons (cons born t
) index
)))
608 (refs (cons (cons born t
) index
)))
610 (refs (cons (cons dies nil
) index
))
612 (refs (cons (cons born t
) index
))))
614 (let* ((sorted (stable-sort (refs)
616 (let ((x-time (car x
))
618 (if (time-spec-order x-time y-time
)
619 (if (time-spec-order y-time x-time
)
620 (and (not (cdr x
)) (cdr y
))
624 ;; :REF-ORDERING element type
626 ;; KLUDGE: was (MOD #.MAX-VOP-TN-REFS), which is still right
627 (oe-type '(unsigned-byte 8))
628 ;; :TARGETS element-type
630 ;; KLUDGE: was (MOD #.(* MAX-VOP-TN-REFS 2)), which does
631 ;; not correspond to the definition in
632 ;; src/compiler/vop.lisp.
633 (te-type '(unsigned-byte 16))
634 (ordering (!make-specialized-array
(length sorted
) oe-type
)))
637 (setf (aref ordering index
) (cdr ref
))
639 `(:num-args
,num-args
640 :num-results
,num-results
641 :ref-ordering
,ordering
643 `(:targets
,(!make-specialized-array
644 (length (targets)) te-type
(targets)))))))))
646 (defun make-emit-function-and-friends (parse)
647 `(:temps
,(compute-temporaries-description parse
)
648 ,@(compute-ref-ordering parse
)))
650 ;;;; generator functions
652 ;;; Return an alist that translates from lists of SCs we can load OP
653 ;;; from to the move function used for loading those SCs. We quietly
654 ;;; ignore restrictions to :non-packed (constant) and :unbounded SCs,
655 ;;; since we don't load into those SCs.
656 (defun find-move-funs (op load-p
)
658 (dolist (sc-name (operand-parse-scs op
))
659 (let* ((sc (sc-or-lose sc-name
))
661 (load-scs (append (when load-p
662 (sc-constant-scs sc
))
663 (sc-alternate-scs sc
))))
666 (dolist (alt load-scs
)
667 (unless (member (sc-name alt
) (operand-parse-scs op
) :test
#'eq
)
668 (let* ((altn (sc-number alt
))
670 (svref (sc-move-funs sc
) altn
)
671 (svref (sc-move-funs alt
) scn
)))
672 (found (or (assoc alt
(funs) :test
#'member
)
673 (rassoc name
(funs)))))
675 (error "no move function defined to ~:[save~;load~] SC ~S ~
676 ~:[to~;from~] from SC ~S"
677 load-p sc-name load-p
(sc-name alt
)))
680 (unless (eq (cdr found
) name
)
681 (error "can't tell whether to ~:[save~;load~]~@
682 with ~S or ~S when operand is in SC ~S"
683 load-p name
(cdr found
) (sc-name alt
)))
684 (pushnew alt
(car found
)))
686 (funs (cons (list alt
) name
))))))))
687 ((member (sb-kind (sc-sb sc
)) '(:non-packed
:unbounded
)))
689 (error "SC ~S has no alternate~:[~; or constant~] SCs, yet it is~@
690 mentioned in the restriction for operand ~S"
691 sc-name load-p
(operand-parse-name op
))))))
694 ;;; Return a form to load/save the specified operand when it has a
695 ;;; load TN. For any given SC that we can load from, there must be a
696 ;;; unique load function. If all SCs we can load from have the same
697 ;;; move function, then we just call that when there is a load TN. If
698 ;;; there are multiple possible move functions, then we dispatch off
699 ;;; of the operand TN's type to see which move function to use.
700 (defun call-move-fun (parse op load-p
)
701 (let ((funs (find-move-funs op load-p
))
702 (load-tn (operand-parse-load-tn op
)))
704 (let* ((tn `(tn-ref-tn ,(operand-parse-temp op
)))
705 (n-vop (or (vop-parse-vop-var parse
)
706 (setf (vop-parse-vop-var parse
) '.vop.
)))
707 (form (if (rest funs
)
709 ,@(mapcar (lambda (x)
710 `(,(mapcar #'sc-name
(car x
))
712 `(,(cdr x
) ,n-vop
,tn
714 `(,(cdr x
) ,n-vop
,load-tn
718 `(,(cdr (first funs
)) ,n-vop
,tn
,load-tn
)
719 `(,(cdr (first funs
)) ,n-vop
,load-tn
,tn
)))))
720 (if (eq (operand-parse-load op
) t
)
721 `(when ,load-tn
,form
)
722 `(when (eq ,load-tn
,(operand-parse-name op
))
725 (error "load TN allocated, but no move function?~@
726 VM definition is inconsistent, recompile and try again.")))))
728 ;;; Return the TN that we should bind to the operand's var in the
729 ;;; generator body. In general, this involves evaluating the :LOAD-IF
731 (defun decide-to-load (parse op
)
732 (let ((load (operand-parse-load op
))
733 (load-tn (operand-parse-load-tn op
))
734 (temp (operand-parse-temp op
)))
736 `(or ,load-tn
(tn-ref-tn ,temp
))
739 (dolist (x (vop-parse-operands parse
))
740 (when (member (operand-parse-kind x
) '(:argument
:result
))
741 (let ((name (operand-parse-name x
)))
742 (binds `(,name
(tn-ref-tn ,(operand-parse-temp x
))))
746 (declare (ignorable ,@(ignores)))
749 (tn-ref-tn ,temp
))))))
751 ;;; Make a lambda that parses the VOP TN-REFS, does automatic operand
752 ;;; loading, and runs the appropriate code generator.
753 (defun make-generator-function (parse)
754 (declare (type vop-parse parse
))
755 (let ((n-vop (vop-parse-vop-var parse
))
756 (operands (vop-parse-operands parse
))
757 (n-info (gensym)) (n-variant (gensym)))
761 (dolist (op operands
)
762 (ecase (operand-parse-kind op
)
764 (let ((temp (operand-parse-temp op
))
765 (name (operand-parse-name op
)))
766 (cond ((and (operand-parse-load op
) (operand-parse-scs op
))
767 (binds `(,(operand-parse-load-tn op
)
768 (tn-ref-load-tn ,temp
)))
769 (binds `(,name
,(decide-to-load parse op
)))
770 (if (eq (operand-parse-kind op
) :argument
)
771 (loads (call-move-fun parse op t
))
772 (saves (call-move-fun parse op nil
))))
774 (binds `(,name
(tn-ref-tn ,temp
)))))))
776 (binds `(,(operand-parse-name op
)
777 (tn-ref-tn ,(operand-parse-temp op
)))))
778 ((:more-argument
:more-result
))))
780 `(named-lambda (vop ,(vop-parse-name parse
)) (,n-vop
)
781 (let* (,@(access-operands (vop-parse-args parse
)
782 (vop-parse-more-args parse
)
784 ,@(access-operands (vop-parse-results parse
)
785 (vop-parse-more-results parse
)
786 `(vop-results ,n-vop
))
787 ,@(access-operands (vop-parse-temps parse
) nil
789 ,@(when (vop-parse-info-args parse
)
790 `((,n-info
(vop-codegen-info ,n-vop
))
791 ,@(mapcar (lambda (x) `(,x
(pop ,n-info
)))
792 (vop-parse-info-args parse
))))
793 ,@(when (vop-parse-variant-vars parse
)
794 `((,n-variant
(vop-info-variant (vop-info ,n-vop
)))
795 ,@(mapcar (lambda (x) `(,x
(pop ,n-variant
)))
796 (vop-parse-variant-vars parse
))))
797 ,@(when (vop-parse-node-var parse
)
798 `((,(vop-parse-node-var parse
) (vop-node ,n-vop
))))
800 (declare (ignore ,@(vop-parse-ignores parse
)))
802 (sb!assem
:assemble
(*code-segment
* ,n-vop
)
803 ,@(vop-parse-body parse
))
806 (defvar *parse-vop-operand-count
*)
807 (defun make-operand-parse-temp ()
808 (without-package-locks
809 (intern (format nil
"OPERAND-PARSE-TEMP-~D" *parse-vop-operand-count
*)
810 (symbol-package '*parse-vop-operand-count
*))))
811 (defun make-operand-parse-load-tn ()
812 (without-package-locks
813 (intern (format nil
"OPERAND-PARSE-LOAD-TN-~D" *parse-vop-operand-count
*)
814 (symbol-package '*parse-vop-operand-count
*))))
816 ;;; Given a list of operand specifications as given to DEFINE-VOP,
817 ;;; return a list of OPERAND-PARSE structures describing the fixed
818 ;;; operands, and a single OPERAND-PARSE describing any more operand.
819 ;;; If we are inheriting a VOP, we default attributes to the inherited
820 ;;; operand of the same name.
821 (defun parse-vop-operands (parse specs kind
)
822 (declare (list specs
)
823 (type (member :argument
:result
) kind
))
826 (collect ((operands))
828 (unless (and (consp spec
) (symbolp (first spec
)) (oddp (length spec
)))
829 (error "malformed operand specifier: ~S" spec
))
831 (error "The MORE operand isn't the last operand: ~S" specs
))
832 (incf *parse-vop-operand-count
*)
833 (let* ((name (first spec
))
834 (old (if (vop-parse-inherits parse
)
837 (vop-parse-inherits parse
))
845 :target
(operand-parse-target old
)
846 :born
(operand-parse-born old
)
847 :dies
(operand-parse-dies old
)
848 :scs
(operand-parse-scs old
)
849 :load-tn
(operand-parse-load-tn old
)
850 :load
(operand-parse-load old
))
856 :born
(parse-time-spec :load
)
857 :dies
(parse-time-spec `(:argument
,(incf num
)))))
862 :born
(parse-time-spec `(:result
,(incf num
)))
863 :dies
(parse-time-spec :save
)))))))
864 (do ((key (rest spec
) (cddr key
)))
866 (let ((value (second key
)))
869 (aver (typep value
'list
))
870 (aver (= (length value
) (length (remove-duplicates value
))))
871 (setf (operand-parse-scs res
) (copy-list value
)))
873 (aver (typep value
'symbol
))
874 (setf (operand-parse-load-tn res
) value
))
876 (setf (operand-parse-load res
) value
))
878 (aver (typep value
'boolean
))
879 (setf (operand-parse-kind res
)
880 (if (eq kind
:argument
) :more-argument
:more-result
))
881 (setf (operand-parse-load res
) nil
)
884 (aver (typep value
'symbol
))
885 (setf (operand-parse-target res
) value
))
887 (unless (eq kind
:result
)
888 (error "can only specify :FROM in a result: ~S" spec
))
889 (setf (operand-parse-born res
) (parse-time-spec value
)))
891 (unless (eq kind
:argument
)
892 (error "can only specify :TO in an argument: ~S" spec
))
893 (setf (operand-parse-dies res
) (parse-time-spec value
)))
895 (error "unknown keyword in operand specifier: ~S" spec
)))))
899 ((operand-parse-target more
)
900 (error "cannot specify :TARGET in a :MORE operand"))
901 ((operand-parse-load more
)
902 (error "cannot specify :LOAD-IF in a :MORE operand")))))
903 (values (the list
(operands)) more
))))
905 ;;; Parse a temporary specification, putting the OPERAND-PARSE
906 ;;; structures in the PARSE structure.
907 (defun parse-temporary (spec parse
)
909 (type vop-parse parse
))
910 (let ((len (length spec
)))
912 (error "malformed temporary spec: ~S" spec
))
913 (unless (listp (second spec
))
914 (error "malformed options list: ~S" (second spec
)))
915 (unless (evenp (length (second spec
)))
916 (error "odd number of arguments in keyword options: ~S" spec
))
917 (unless (consp (cddr spec
))
918 (warn "temporary spec allocates no temps:~% ~S" spec
))
919 (dolist (name (cddr spec
))
920 (unless (symbolp name
)
921 (error "bad temporary name: ~S" name
))
922 (incf *parse-vop-operand-count
*)
923 (let ((res (make-operand-parse :name name
925 :born
(parse-time-spec :load
)
926 :dies
(parse-time-spec :save
))))
927 (do ((opt (second spec
) (cddr opt
)))
931 (setf (operand-parse-target res
)
932 (vop-spec-arg opt
'symbol
1 nil
)))
934 (setf (operand-parse-sc res
)
935 (vop-spec-arg opt
'symbol
1 nil
)))
937 (let ((offset (eval (second opt
))))
938 (aver (typep offset
'unsigned-byte
))
939 (setf (operand-parse-offset res
) offset
)))
941 (setf (operand-parse-born res
) (parse-time-spec (second opt
))))
943 (setf (operand-parse-dies res
) (parse-time-spec (second opt
))))
944 ;; backward compatibility...
946 (let ((scs (vop-spec-arg opt
'list
1 nil
)))
947 (unless (= (length scs
) 1)
948 (error "must specify exactly one SC for a temporary"))
949 (setf (operand-parse-sc res
) (first scs
))))
952 (error "unknown temporary option: ~S" opt
))))
954 (unless (and (time-spec-order (operand-parse-dies res
)
955 (operand-parse-born res
))
956 (not (time-spec-order (operand-parse-born res
)
957 (operand-parse-dies res
))))
958 (error "Temporary lifetime doesn't begin before it ends: ~S" spec
))
960 (unless (operand-parse-sc res
)
961 (error "must specify :SC for all temporaries: ~S" spec
))
963 (setf (vop-parse-temps parse
)
965 (remove name
(vop-parse-temps parse
)
966 :key
#'operand-parse-name
))))))
969 (defun compute-parse-vop-operand-count (parse)
970 (declare (type vop-parse parse
))
971 (labels ((compute-count-aux (parse)
972 (declare (type vop-parse parse
))
973 (if (null (vop-parse-inherits parse
))
974 (length (vop-parse-operands parse
))
975 (+ (length (vop-parse-operands parse
))
977 (vop-parse-or-lose (vop-parse-inherits parse
)))))))
978 (if (null (vop-parse-inherits parse
))
980 (compute-count-aux (vop-parse-or-lose (vop-parse-inherits parse
))))))
982 ;;; the top level parse function: clobber PARSE to represent the
983 ;;; specified options.
984 (defun parse-define-vop (parse specs
)
985 (declare (type vop-parse parse
) (list specs
))
986 (let ((*parse-vop-operand-count
* (compute-parse-vop-operand-count parse
)))
989 (error "malformed option specification: ~S" spec
))
992 (multiple-value-bind (fixed more
)
993 (parse-vop-operands parse
(rest spec
) :argument
)
994 (setf (vop-parse-args parse
) fixed
)
995 (setf (vop-parse-more-args parse
) more
)))
997 (multiple-value-bind (fixed more
)
998 (parse-vop-operands parse
(rest spec
) :result
)
999 (setf (vop-parse-results parse
) fixed
)
1000 (setf (vop-parse-more-results parse
) more
))
1001 (setf (vop-parse-conditional-p parse
) nil
))
1003 (setf (vop-parse-result-types parse
) ())
1004 (setf (vop-parse-results parse
) ())
1005 (setf (vop-parse-more-results parse
) nil
)
1006 (setf (vop-parse-conditional-p parse
) (or (rest spec
) t
)))
1008 (parse-temporary spec parse
))
1010 (setf (vop-parse-cost parse
)
1011 (vop-spec-arg spec
'unsigned-byte
1 nil
))
1012 (setf (vop-parse-body parse
) (cddr spec
)))
1014 (setf (vop-parse-effects parse
) (rest spec
)))
1016 (setf (vop-parse-affected parse
) (rest spec
)))
1018 (setf (vop-parse-info-args parse
) (rest spec
)))
1020 (setf (vop-parse-ignores parse
) (rest spec
)))
1022 (setf (vop-parse-variant parse
) (rest spec
)))
1024 (let ((vars (rest spec
)))
1025 (setf (vop-parse-variant-vars parse
) vars
)
1026 (setf (vop-parse-variant parse
)
1027 (make-list (length vars
) :initial-element nil
))))
1029 (setf (vop-parse-cost parse
) (vop-spec-arg spec
'unsigned-byte
)))
1031 (setf (vop-parse-vop-var parse
) (vop-spec-arg spec
'symbol
)))
1033 (setf (vop-parse-move-args parse
)
1034 (vop-spec-arg spec
'(member nil
:local-call
:full-call
1037 (setf (vop-parse-node-var parse
) (vop-spec-arg spec
'symbol
)))
1039 (setf (vop-parse-note parse
) (vop-spec-arg spec
'(or string null
))))
1041 (setf (vop-parse-arg-types parse
)
1042 (parse-vop-operand-types (rest spec
) t
)))
1044 (setf (vop-parse-result-types parse
)
1045 (parse-vop-operand-types (rest spec
) nil
)))
1047 (setf (vop-parse-translate parse
) (rest spec
)))
1049 (setf (vop-parse-guard parse
) (vop-spec-arg spec t
)))
1050 ;; FIXME: :LTN-POLICY would be a better name for this. It
1051 ;; would probably be good to leave it unchanged for a while,
1052 ;; though, at least until the first port to some other
1053 ;; architecture, since the renaming would be a change to the
1054 ;; interface between
1056 (setf (vop-parse-ltn-policy parse
)
1057 (vop-spec-arg spec
'ltn-policy
)))
1059 (setf (vop-parse-save-p parse
)
1061 '(member t nil
:compute-only
:force-to-stack
))))
1063 (error "unknown option specifier: ~S" (first spec
)))))
1066 ;;;; making costs and restrictions
1068 ;;; Given an operand, returns two values:
1069 ;;; 1. A SC-vector of the cost for the operand being in that SC,
1070 ;;; including both the costs for move functions and coercion VOPs.
1071 ;;; 2. A SC-vector holding the SC that we load into, for any SC
1072 ;;; that we can directly load from.
1074 ;;; In both vectors, unused entries are NIL. LOAD-P specifies the
1075 ;;; direction: if true, we are loading, if false we are saving.
1076 (defun compute-loading-costs (op load-p
)
1077 (declare (type operand-parse op
))
1078 (let ((scs (operand-parse-scs op
))
1079 (costs (make-array sc-number-limit
:initial-element nil
))
1080 (load-scs (make-array sc-number-limit
:initial-element nil
)))
1081 (dolist (sc-name scs
)
1082 (let* ((load-sc (sc-or-lose sc-name
))
1083 (load-scn (sc-number load-sc
)))
1084 (setf (svref costs load-scn
) 0)
1085 (setf (svref load-scs load-scn
) t
)
1086 (dolist (op-sc (append (when load-p
1087 (sc-constant-scs load-sc
))
1088 (sc-alternate-scs load-sc
)))
1089 (let* ((op-scn (sc-number op-sc
))
1091 (aref (sc-load-costs load-sc
) op-scn
)
1092 (aref (sc-load-costs op-sc
) load-scn
))))
1094 (error "no move function defined to move ~:[from~;to~] SC ~
1095 ~S~%~:[to~;from~] alternate or constant SC ~S"
1096 load-p sc-name load-p
(sc-name op-sc
)))
1098 (let ((op-cost (svref costs op-scn
)))
1099 (when (or (not op-cost
) (< load op-cost
))
1100 (setf (svref costs op-scn
) load
)))
1102 (let ((op-load (svref load-scs op-scn
)))
1103 (unless (eq op-load t
)
1104 (pushnew load-scn
(svref load-scs op-scn
))))))
1106 (dotimes (i sc-number-limit
)
1107 (unless (svref costs i
)
1108 (let ((op-sc (svref *backend-sc-numbers
* i
)))
1110 (let ((cost (if load-p
1111 (svref (sc-move-costs load-sc
) i
)
1112 (svref (sc-move-costs op-sc
) load-scn
))))
1114 (setf (svref costs i
) cost
)))))))))
1116 (values costs load-scs
)))
1118 (defparameter *no-costs
*
1119 (make-array sc-number-limit
:initial-element
0))
1121 (defparameter *no-loads
*
1122 (make-array sc-number-limit
:initial-element t
))
1124 ;;; Pick off the case of operands with no restrictions.
1125 (defun compute-loading-costs-if-any (op load-p
)
1126 (declare (type operand-parse op
))
1127 (if (operand-parse-scs op
)
1128 (compute-loading-costs op load-p
)
1129 (values *no-costs
* *no-loads
*)))
1131 (defun compute-costs-and-restrictions-list (ops load-p
)
1132 (declare (list ops
))
1136 (multiple-value-bind (costs scs
) (compute-loading-costs-if-any op load-p
)
1139 (values (costs) (scs))))
1141 (defun make-costs-and-restrictions (parse)
1142 (multiple-value-bind (arg-costs arg-scs
)
1143 (compute-costs-and-restrictions-list (vop-parse-args parse
) t
)
1144 (multiple-value-bind (result-costs result-scs
)
1145 (compute-costs-and-restrictions-list (vop-parse-results parse
) nil
)
1147 :cost
,(vop-parse-cost parse
)
1149 :arg-costs
',arg-costs
1150 :arg-load-scs
',arg-scs
1151 :result-costs
',result-costs
1152 :result-load-scs
',result-scs
1155 ',(if (vop-parse-more-args parse
)
1156 (compute-loading-costs-if-any (vop-parse-more-args parse
) t
)
1160 ',(if (vop-parse-more-results parse
)
1161 (compute-loading-costs-if-any (vop-parse-more-results parse
) nil
)
1164 ;;;; operand checking and stuff
1166 ;;; Given a list of arg/result restrictions, check for valid syntax
1167 ;;; and convert to canonical form.
1168 (defun parse-vop-operand-types (specs args-p
)
1169 (declare (list specs
))
1170 (labels ((primtype-alias-p (spec)
1171 (cdr (assq spec
*backend-primitive-type-aliases
*)))
1172 (parse-operand-type (spec)
1173 (cond ((eq spec
'*) spec
)
1175 (let ((alias (primtype-alias-p spec
)))
1177 (parse-operand-type alias
)
1180 (error "bad thing to be a operand type: ~S" spec
))
1184 (collect ((results))
1185 (dolist (item (cdr spec
))
1186 (unless (symbolp item
)
1187 (error "bad PRIMITIVE-TYPE name in ~S: ~S"
1189 (let ((alias (primtype-alias-p item
)))
1191 (let ((alias (parse-operand-type alias
)))
1192 (unless (eq (car alias
) :or
)
1193 (error "can't include primitive-type ~
1194 alias ~S in an :OR restriction: ~S"
1196 (dolist (x (cdr alias
))
1199 `(:or
,@(remove-duplicates (results) :test
#'eq
))))
1202 (error "can't :CONSTANT for a result"))
1203 (unless (= (length spec
) 2)
1204 (error "bad :CONSTANT argument type spec: ~S" spec
))
1207 (error "bad thing to be a operand type: ~S" spec
)))))))
1208 (mapcar #'parse-operand-type specs
)))
1210 ;;; Check the consistency of OP's SC restrictions with the specified
1211 ;;; primitive-type restriction. :CONSTANT operands have already been
1212 ;;; filtered out, so only :OR and * restrictions are left.
1214 ;;; We check that every representation allowed by the type can be
1215 ;;; directly loaded into some SC in the restriction, and that the type
1216 ;;; allows every SC in the restriction. With *, we require that T
1217 ;;; satisfy the first test, and omit the second.
1218 (defun check-operand-type-scs (parse op type load-p
)
1219 (declare (type vop-parse parse
) (type operand-parse op
))
1220 (let ((ptypes (if (eq type
'*) (list t
) (rest type
)))
1221 (scs (operand-parse-scs op
)))
1223 (multiple-value-bind (costs load-scs
) (compute-loading-costs op load-p
)
1224 (declare (ignore costs
))
1225 (dolist (ptype ptypes
)
1226 (unless (dolist (rep (primitive-type-scs
1227 (primitive-type-or-lose ptype
))
1229 (when (svref load-scs rep
) (return t
)))
1230 (error "In the ~A ~:[result~;argument~] to VOP ~S,~@
1231 none of the SCs allowed by the operand type ~S can ~
1232 directly be loaded~@
1233 into any of the restriction's SCs:~% ~S~:[~;~@
1234 [* type operand must allow T's SCs.]~]"
1235 (operand-parse-name op
) load-p
(vop-parse-name parse
)
1237 scs
(eq type
'*)))))
1240 (unless (or (eq type
'*)
1241 (dolist (ptype ptypes nil
)
1242 (when (sc-allowed-by-primitive-type
1244 (primitive-type-or-lose ptype
))
1246 (warn "~:[Result~;Argument~] ~A to VOP ~S~@
1247 has SC restriction ~S which is ~
1248 not allowed by the operand type:~% ~S"
1249 load-p
(operand-parse-name op
) (vop-parse-name parse
)
1254 ;;; If the operand types are specified, then check the number specified
1255 ;;; against the number of defined operands.
1256 (defun check-operand-types (parse ops more-op types load-p
)
1257 (declare (type vop-parse parse
) (list ops
)
1258 (type (or list
(member :unspecified
)) types
)
1259 (type (or operand-parse null
) more-op
))
1260 (unless (eq types
:unspecified
)
1261 (let ((num (+ (length ops
) (if more-op
1 0))))
1262 (unless (= (count-if-not (lambda (x)
1264 (eq (car x
) :constant
)))
1267 (error "expected ~W ~:[result~;argument~] type~P: ~S"
1268 num load-p types num
)))
1271 (let ((mtype (car (last types
))))
1272 (when (and (consp mtype
) (eq (first mtype
) :constant
))
1273 (error "can't use :CONSTANT on VOP more args")))))
1275 (when (vop-parse-translate parse
)
1276 (let ((types (specify-operand-types types ops more-op
)))
1278 (check-operand-type-scs parse x y load-p
))
1279 (if more-op
(butlast ops
) ops
)
1280 (remove-if (lambda (x)
1282 (eq (car x
) ':constant
)))
1283 (if more-op
(butlast types
) types
)))))
1287 ;;; Compute stuff that can only be computed after we are done parsing
1288 ;;; everying. We set the VOP-PARSE-OPERANDS, and do various error checks.
1289 (defun grovel-vop-operands (parse)
1290 (declare (type vop-parse parse
))
1292 (setf (vop-parse-operands parse
)
1293 (append (vop-parse-args parse
)
1294 (if (vop-parse-more-args parse
)
1295 (list (vop-parse-more-args parse
)))
1296 (vop-parse-results parse
)
1297 (if (vop-parse-more-results parse
)
1298 (list (vop-parse-more-results parse
)))
1299 (vop-parse-temps parse
)))
1301 (check-operand-types parse
1302 (vop-parse-args parse
)
1303 (vop-parse-more-args parse
)
1304 (vop-parse-arg-types parse
)
1307 (check-operand-types parse
1308 (vop-parse-results parse
)
1309 (vop-parse-more-results parse
)
1310 (vop-parse-result-types parse
)
1315 ;;;; function translation stuff
1317 ;;; Return forms to establish this VOP as a IR2 translation template
1318 ;;; for the :TRANSLATE functions specified in the VOP-PARSE. We also
1319 ;;; set the PREDICATE attribute for each translated function when the
1320 ;;; VOP is conditional, causing IR1 conversion to ensure that a call
1321 ;;; to the translated is always used in a predicate position.
1322 (defun set-up-fun-translation (parse n-template
)
1323 (declare (type vop-parse parse
))
1324 (mapcar (lambda (name)
1325 `(let ((info (fun-info-or-lose ',name
)))
1326 (setf (fun-info-templates info
)
1327 (adjoin-template ,n-template
(fun-info-templates info
)))
1328 ,@(when (vop-parse-conditional-p parse
)
1329 '((setf (fun-info-attributes info
)
1331 (ir1-attributes predicate
)
1332 (fun-info-attributes info
)))))))
1333 (vop-parse-translate parse
)))
1335 ;;; Return a form that can be evaluated to get the TEMPLATE operand type
1336 ;;; restriction from the given specification.
1337 (defun make-operand-type (type)
1338 (cond ((eq type
'*) ''*)
1340 ``(:or
,(primitive-type-or-lose ',type
)))
1344 ``(:or
,,@(mapcar (lambda (type)
1345 `(primitive-type-or-lose ',type
))
1348 ``(:constant
,(named-lambda (vop-arg-typep) (x)
1349 ;; Can't handle SATISFIES during XC
1350 ,(if (and (consp (second type
))
1351 (eq (caadr type
) 'satisfies
))
1353 `(sb!xc
:typep x
',(second type
))))
1354 ,',(second type
)))))))
1356 (defun specify-operand-types (types ops more-ops
)
1357 (if (eq types
:unspecified
)
1358 (make-list (+ (length ops
) (if more-ops
1 0)) :initial-element
'*)
1361 ;;; Return a list of forms to use as &KEY args to MAKE-VOP-INFO for
1362 ;;; setting up the template argument and result types. Here we make an
1363 ;;; initial dummy TEMPLATE-TYPE, since it is awkward to compute the
1364 ;;; type until the template has been made.
1365 (defun make-vop-info-types (parse)
1366 (let* ((more-args (vop-parse-more-args parse
))
1367 (all-args (specify-operand-types (vop-parse-arg-types parse
)
1368 (vop-parse-args parse
)
1370 (args (if more-args
(butlast all-args
) all-args
))
1371 (more-arg (when more-args
(car (last all-args
))))
1372 (more-results (vop-parse-more-results parse
))
1373 (all-results (specify-operand-types (vop-parse-result-types parse
)
1374 (vop-parse-results parse
)
1376 (results (if more-results
(butlast all-results
) all-results
))
1377 (more-result (when more-results
(car (last all-results
))))
1378 (conditional (vop-parse-conditional-p parse
)))
1380 `(:type
(specifier-type '(function () nil
))
1381 :arg-types
(list ,@(mapcar #'make-operand-type args
))
1382 :more-args-type
,(when more-args
(make-operand-type more-arg
))
1383 :result-types
,(cond ((eq conditional t
)
1386 `'(:conditional .
,conditional
))
1388 `(list ,@(mapcar #'make-operand-type results
))))
1389 :more-results-type
,(when more-results
1390 (make-operand-type more-result
)))))
1392 ;;;; setting up VOP-INFO
1394 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
1395 (defparameter *slot-inherit-alist
*
1396 '((:generator-function . vop-info-generator-function
))))
1398 ;;; This is something to help with inheriting VOP-INFO slots. We
1399 ;;; return a keyword/value pair that can be passed to the constructor.
1400 ;;; SLOT is the keyword name of the slot, Parse is a form that
1401 ;;; evaluates to the VOP-PARSE structure for the VOP inherited. If
1402 ;;; PARSE is NIL, then we do nothing. If the TEST form evaluates to
1403 ;;; true, then we return a form that selects the named slot from the
1404 ;;; VOP-INFO structure corresponding to PARSE. Otherwise, we return
1405 ;;; the FORM so that the slot is recomputed.
1406 (defmacro inherit-vop-info
(slot parse test form
)
1407 `(if (and ,parse
,test
)
1408 (list ,slot
`(,',(or (cdr (assoc slot
*slot-inherit-alist
*))
1409 (error "unknown slot ~S" slot
))
1410 (template-or-lose ',(vop-parse-name ,parse
))))
1411 (list ,slot
,form
)))
1413 ;;; Return a form that creates a VOP-INFO structure which describes VOP.
1414 (defun set-up-vop-info (iparse parse
)
1415 (declare (type vop-parse parse
) (type (or vop-parse null
) iparse
))
1416 (let ((same-operands
1418 (equal (vop-parse-operands parse
)
1419 (vop-parse-operands iparse
))
1420 (equal (vop-parse-info-args iparse
)
1421 (vop-parse-info-args parse
))))
1422 (variant (vop-parse-variant parse
)))
1424 (let ((nvars (length (vop-parse-variant-vars parse
))))
1425 (unless (= (length variant
) nvars
)
1426 (error "expected ~W variant values: ~S" nvars variant
)))
1429 :name
',(vop-parse-name parse
)
1430 ,@(make-vop-info-types parse
)
1431 :guard
,(when (vop-parse-guard parse
)
1432 `(lambda () ,(vop-parse-guard parse
)))
1433 :note
',(vop-parse-note parse
)
1434 :info-arg-count
,(length (vop-parse-info-args parse
))
1435 :ltn-policy
',(vop-parse-ltn-policy parse
)
1436 :save-p
',(vop-parse-save-p parse
)
1437 :move-args
',(vop-parse-move-args parse
)
1438 :effects
(vop-attributes ,@(vop-parse-effects parse
))
1439 :affected
(vop-attributes ,@(vop-parse-affected parse
))
1440 ,@(make-costs-and-restrictions parse
)
1441 ,@(make-emit-function-and-friends parse
)
1442 ,@(inherit-vop-info :generator-function iparse
1444 (equal (vop-parse-body parse
) (vop-parse-body iparse
)))
1445 (unless (eq (vop-parse-body parse
) :unspecified
)
1446 (make-generator-function parse
)))
1447 :variant
(list ,@variant
))))
1449 ;;; Define the symbol NAME to be a Virtual OPeration in the compiler.
1450 ;;; If specified, INHERITS is the name of a VOP that we default
1451 ;;; unspecified information from. Each SPEC is a list beginning with a
1452 ;;; keyword indicating the interpretation of the other forms in the
1455 ;;; :ARGS {(Name {Key Value}*)}*
1456 ;;; :RESULTS {(Name {Key Value}*)}*
1457 ;;; The Args and Results are specifications of the operand TNs passed
1458 ;;; to the VOP. If there is an inherited VOP, any unspecified options
1459 ;;; are defaulted from the inherited argument (or result) of the same
1460 ;;; name. The following operand options are defined:
1463 ;;; :SCs specifies good SCs for this operand. Other SCs will
1464 ;;; be penalized according to move costs. A load TN will be
1465 ;;; allocated if necessary, guaranteeing that the operand is
1466 ;;; always one of the specified SCs.
1468 ;;; :LOAD-TN Load-Name
1469 ;;; Load-Name is bound to the load TN allocated for this
1470 ;;; operand, or to NIL if no load TN was allocated.
1472 ;;; :LOAD-IF EXPRESSION
1473 ;;; Controls whether automatic operand loading is done.
1474 ;;; EXPRESSION is evaluated with the fixed operand TNs bound.
1475 ;;; If EXPRESSION is true, then loading is done and the variable
1476 ;;; is bound to the load TN in the generator body. Otherwise,
1477 ;;; loading is not done, and the variable is bound to the actual
1481 ;;; If specified, NAME is bound to the TN-REF for the first
1482 ;;; argument or result following the fixed arguments or results.
1483 ;;; A :MORE operand must appear last, and cannot be targeted or
1487 ;;; This operand is targeted to the named operand, indicating a
1488 ;;; desire to pack in the same location. Not legal for results.
1492 ;;; Specify the beginning or end of the operand's lifetime.
1493 ;;; :FROM can only be used with results, and :TO only with
1494 ;;; arguments. The default for the N'th argument/result is
1495 ;;; (:ARGUMENT N)/(:RESULT N). These options are necessary
1496 ;;; primarily when operands are read or written out of order.
1498 ;;; :CONDITIONAL [Condition-descriptor+]
1499 ;;; This is used in place of :RESULTS with conditional branch VOPs.
1500 ;;; There are no result values: the result is a transfer of control.
1501 ;;; The target label is passed as the first :INFO arg. The second
1502 ;;; :INFO arg is true if the sense of the test should be negated.
1503 ;;; A side effect is to set the PREDICATE attribute for functions
1504 ;;; in the :TRANSLATE option.
1506 ;;; If some condition descriptors are provided, this is a flag-setting
1507 ;;; VOP. Descriptors are interpreted in an architecture-dependent
1508 ;;; manner. See the BRANCH-IF VOP in $ARCH/pred.lisp.
1510 ;;; :TEMPORARY ({Key Value}*) Name*
1511 ;;; Allocate a temporary TN for each Name, binding that variable to
1512 ;;; the TN within the body of the generators. In addition to :TARGET
1513 ;;; (which is is the same as for operands), the following options are
1517 ;;; :OFFSET SB-Offset
1518 ;;; Force the temporary to be allocated in the specified SC
1519 ;;; with the specified offset. Offset is evaluated at
1520 ;;; macroexpand time. If Offset is omitted, the register
1521 ;;; allocator chooses a free location in SC. If both SC and
1522 ;;; Offset are omitted, then the temporary is packed according
1523 ;;; to its primitive type.
1527 ;;; Similar to the argument/result option, this specifies the
1528 ;;; start and end of the temporaries' lives. The defaults are
1529 ;;; :LOAD and :SAVE, i.e. the duration of the VOP. The other
1530 ;;; intervening phases are :ARGUMENT, :EVAL and :RESULT.
1531 ;;; Non-zero sub-phases can be specified by a list, e.g. by
1532 ;;; default the second argument's life ends at (:ARGUMENT 1).
1534 ;;; :GENERATOR Cost Form*
1535 ;;; Specifies the translation into assembly code. Cost is the
1536 ;;; estimated cost of the code emitted by this generator. The body
1537 ;;; is arbitrary Lisp code that emits the assembly language
1538 ;;; translation of the VOP. An ASSEMBLE form is wrapped around
1539 ;;; the body, so code may be emitted by using the local INST macro.
1540 ;;; During the evaluation of the body, the names of the operands
1541 ;;; and temporaries are bound to the actual TNs.
1543 ;;; :EFFECTS Effect*
1544 ;;; :AFFECTED Effect*
1545 ;;; Specifies the side effects that this VOP has and the side
1546 ;;; effects that effect its execution. If unspecified, these
1547 ;;; default to the worst case.
1550 ;;; Define some magic arguments that are passed directly to the code
1551 ;;; generator. The corresponding trailing arguments to VOP or
1552 ;;; %PRIMITIVE are stored in the VOP structure. Within the body
1553 ;;; of the generators, the named variables are bound to these
1554 ;;; values. Except in the case of :CONDITIONAL VOPs, :INFO arguments
1555 ;;; cannot be specified for VOPS that are the direct translation
1556 ;;; for a function (specified by :TRANSLATE).
1559 ;;; Causes the named variables to be declared IGNORE in the
1563 ;;; :VARIANT-VARS Name*
1564 ;;; These options provide a way to parameterize families of VOPs
1565 ;;; that differ only trivially. :VARIANT makes the specified
1566 ;;; evaluated Things be the "variant" associated with this VOP.
1567 ;;; :VARIANT-VARS causes the named variables to be bound to the
1568 ;;; corresponding Things within the body of the generator.
1570 ;;; :VARIANT-COST Cost
1571 ;;; Specifies the cost of this VOP, overriding the cost of any
1572 ;;; inherited generator.
1574 ;;; :NOTE {String | NIL}
1575 ;;; A short noun-like phrase describing what this VOP "does", i.e.
1576 ;;; the implementation strategy. If supplied, efficiency notes will
1577 ;;; be generated when type uncertainty prevents :TRANSLATE from
1578 ;;; working. NIL inhibits any efficiency note.
1580 ;;; :ARG-TYPES {* | PType | (:OR PType*) | (:CONSTANT Type)}*
1581 ;;; :RESULT-TYPES {* | PType | (:OR PType*)}*
1582 ;;; Specify the template type restrictions used for automatic
1583 ;;; translation. If there is a :MORE operand, the last type is the
1584 ;;; more type. :CONSTANT specifies that the argument must be a
1585 ;;; compile-time constant of the specified Lisp type. The constant
1586 ;;; values of :CONSTANT arguments are passed as additional :INFO
1587 ;;; arguments rather than as :ARGS.
1589 ;;; :TRANSLATE Name*
1590 ;;; This option causes the VOP template to be entered as an IR2
1591 ;;; translation for the named functions.
1593 ;;; :POLICY {:SMALL | :FAST | :SAFE | :FAST-SAFE}
1594 ;;; Specifies the policy under which this VOP is the best translation.
1597 ;;; Specifies a Form that is evaluated in the global environment.
1598 ;;; If form returns NIL, then emission of this VOP is prohibited
1599 ;;; even when all other restrictions are met.
1603 ;;; In the generator, bind the specified variable to the VOP or
1604 ;;; the Node that generated this VOP.
1606 ;;; :SAVE-P {NIL | T | :COMPUTE-ONLY | :FORCE-TO-STACK}
1607 ;;; Indicates how a VOP wants live registers saved.
1609 ;;; :MOVE-ARGS {NIL | :FULL-CALL | :LOCAL-CALL | :KNOWN-RETURN}
1610 ;;; Indicates if and how the more args should be moved into a
1611 ;;; different frame.
1612 (def!macro define-vop
((name &optional inherits
) &body specs
)
1613 (declare (type symbol name
))
1614 ;; Parse the syntax into a VOP-PARSE structure, and then expand into
1615 ;; code that creates the appropriate VOP-INFO structure at load time.
1616 ;; We implement inheritance by copying the VOP-PARSE structure for
1617 ;; the inherited structure.
1618 (let* ((inherited-parse (when inherits
1619 (vop-parse-or-lose inherits
)))
1621 (copy-vop-parse inherited-parse
)
1624 (setf (vop-parse-name parse
) name
)
1625 (setf (vop-parse-inherits parse
) inherits
)
1627 (parse-define-vop parse specs
)
1628 (grovel-vop-operands parse
)
1631 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
1632 (setf (gethash ',name
*backend-parsed-vops
*)
1635 (let ((,n-res
,(set-up-vop-info inherited-parse parse
)))
1636 (store-vop-info ,n-res
)
1637 ,@(set-up-fun-translation parse n-res
))
1638 (let ((source-location (source-location)))
1639 (when source-location
1640 (setf (info :source-location
:vop
',name
) source-location
)))
1643 (defun store-vop-info (vop-info)
1644 ;; This is an inefficent way to perform coalescing, but it doesn't matter.
1645 (let* ((my-type-spec (template-type-specifier vop-info
))
1646 (my-type (specifier-type my-type-spec
)))
1647 (unless (block found
1648 (maphash (lambda (name other
)
1649 (declare (ignore name
))
1650 ;; we get better coaelesecing by TYPE= rather than
1651 ;; EQUALP on (template-type-specifier vop-info)
1652 ;; because some types have multiple spellings.
1653 (when (type= (vop-info-type other
) my-type
)
1654 (setf (vop-info-type vop-info
) (vop-info-type other
))
1655 (return-from found t
)))
1656 *backend-template-names
*))
1657 (setf (vop-info-type vop-info
) (specifier-type my-type-spec
))))
1658 (flet ((find-equalp (accessor)
1659 ;; Read the slot from VOP-INFO and try to find any other vop-info
1660 ;; that has an EQUALP value in that slot, returning that value.
1661 ;; Failing that, try again at a finer grain.
1662 (let ((my-val (funcall accessor vop-info
))) ; list of vectors
1663 (maphash (lambda (name other
)
1664 (declare (ignore name
))
1665 (let ((other-val (funcall accessor other
)))
1666 (when (equalp other-val my-val
)
1667 (return-from find-equalp other-val
))))
1668 *backend-template-names
*)
1669 (unless (and (listp my-val
) (vectorp (car my-val
)))
1670 (return-from find-equalp my-val
))
1671 (mapl (lambda (cell)
1672 (let ((my-vector (car cell
)))
1674 (maphash (lambda (name other
)
1675 (declare (ignore name
))
1676 (dolist (other-vector
1677 (funcall accessor other
))
1678 (when (equalp other-vector my-vector
)
1679 (rplaca cell other-vector
)
1680 (return-from found
))))
1681 *backend-template-names
*))))
1682 (copy-list my-val
))))) ; was a quoted constant, don't mutate
1683 (macrolet ((try-coalescing (accessor)
1684 `(setf (,accessor vop-info
) (find-equalp #',accessor
))))
1685 (try-coalescing vop-info-arg-types
)
1686 (try-coalescing vop-info-arg-costs
)
1687 (try-coalescing vop-info-arg-load-scs
)
1688 (try-coalescing vop-info-result-types
)
1689 (try-coalescing vop-info-result-costs
)
1690 (try-coalescing vop-info-result-load-scs
)
1691 (try-coalescing vop-info-more-arg-costs
)
1692 (try-coalescing vop-info-more-result-costs
)
1693 (try-coalescing vop-info-temps
)
1694 (try-coalescing vop-info-ref-ordering
)
1695 (try-coalescing vop-info-targets
)))
1696 (setf (gethash (vop-info-name vop-info
) *backend-template-names
*)
1699 ;;;; emission macros
1701 ;;; Return code to make a list of VOP arguments or results, linked by
1702 ;;; TN-REF-ACROSS. The first value is code, the second value is LET*
1703 ;;; forms, and the third value is a variable that evaluates to the
1704 ;;; head of the list, or NIL if there are no operands. Fixed is a list
1705 ;;; of forms that evaluate to TNs for the fixed operands. TN-REFS will
1706 ;;; be made for these operands according using the specified value of
1707 ;;; WRITE-P. More is an expression that evaluates to a list of TN-REFS
1708 ;;; that will be made the tail of the list. If it is constant NIL,
1709 ;;; then we don't bother to set the tail.
1710 (defun make-operand-list (fixed more write-p
)
1716 (let ((n-ref (gensym)))
1717 (binds `(,n-ref
(reference-tn ,op
,write-p
)))
1719 (forms `(setf (tn-ref-across ,n-prev
) ,n-ref
))
1720 (setq n-head n-ref
))
1721 (setq n-prev n-ref
)))
1724 (let ((n-more (gensym)))
1725 (binds `(,n-more
,more
))
1727 (forms `(setf (tn-ref-across ,n-prev
) ,n-more
))
1728 (setq n-head n-more
))))
1730 (values (forms) (binds) n-head
))))
1732 ;;; Emit-Template Node Block Template Args Results [Info]
1734 ;;; Call the emit function for TEMPLATE, linking the result in at the
1736 (defmacro emit-template
(node block template args results
&optional info
)
1737 `(emit-and-insert-vop ,node
,block
,template
,args
,results nil
1738 ,@(when info
`(,info
))))
1740 ;;; VOP Name Node Block Arg* Info* Result*
1742 ;;; Emit the VOP (or other template) NAME at the end of the IR2-BLOCK
1743 ;;; BLOCK, using NODE for the source context. The interpretation of
1744 ;;; the remaining arguments depends on the number of operands of
1745 ;;; various kinds that are declared in the template definition. VOP
1746 ;;; cannot be used for templates that have more-args or more-results,
1747 ;;; since the number of arguments and results is indeterminate for
1748 ;;; these templates. Use VOP* instead.
1750 ;;; ARGS and RESULTS are the TNs that are to be referenced by the
1751 ;;; template as arguments and results. If the template has
1752 ;;; codegen-info arguments, then the appropriate number of INFO forms
1753 ;;; following the arguments are used for codegen info.
1754 (defmacro vop
(name node block
&rest operands
)
1755 (let* ((parse (vop-parse-or-lose name
))
1756 (arg-count (length (vop-parse-args parse
)))
1757 (result-count (length (vop-parse-results parse
)))
1758 (info-count (length (vop-parse-info-args parse
)))
1759 (noperands (+ arg-count result-count info-count
))
1762 (n-template (gensym)))
1764 (when (or (vop-parse-more-args parse
) (vop-parse-more-results parse
))
1765 (error "cannot use VOP with variable operand count templates"))
1766 (unless (= noperands
(length operands
))
1767 (error "called with ~W operands, but was expecting ~W"
1768 (length operands
) noperands
))
1770 (multiple-value-bind (acode abinds n-args
)
1771 (make-operand-list (subseq operands
0 arg-count
) nil nil
)
1772 (multiple-value-bind (rcode rbinds n-results
)
1773 (make-operand-list (subseq operands
(+ arg-count info-count
)) nil t
)
1777 (dolist (info (subseq operands arg-count
(+ arg-count info-count
)))
1778 (let ((temp (gensym)))
1779 (ibinds `(,temp
,info
))
1782 `(let* ((,n-node
,node
)
1784 (,n-template
(template-or-lose ',name
))
1790 (emit-template ,n-node
,n-block
,n-template
,n-args
1793 `((list ,@(ivars)))))
1796 ;;; VOP* Name Node Block (Arg* More-Args) (Result* More-Results) Info*
1798 ;;; This is like VOP, but allows for emission of templates with
1799 ;;; arbitrary numbers of arguments, and for emission of templates
1800 ;;; using already-created TN-REF lists.
1802 ;;; The ARGS and RESULTS are TNs to be referenced as the first
1803 ;;; arguments and results to the template. More-Args and More-Results
1804 ;;; are heads of TN-REF lists that are added onto the end of the
1805 ;;; TN-REFS for the explicitly supplied operand TNs. The TN-REFS for
1806 ;;; the more operands must have the TN and WRITE-P slots correctly
1809 ;;; As with VOP, the INFO forms are evaluated and passed as codegen
1811 (defmacro vop
* (name node block args results
&rest info
)
1812 (declare (type cons args results
))
1813 (let* ((parse (vop-parse-or-lose name
))
1814 (arg-count (length (vop-parse-args parse
)))
1815 (result-count (length (vop-parse-results parse
)))
1816 (info-count (length (vop-parse-info-args parse
)))
1817 (fixed-args (butlast args
))
1818 (fixed-results (butlast results
))
1821 (n-template (gensym)))
1823 (unless (or (vop-parse-more-args parse
)
1824 (<= (length fixed-args
) arg-count
))
1825 (error "too many fixed arguments"))
1826 (unless (or (vop-parse-more-results parse
)
1827 (<= (length fixed-results
) result-count
))
1828 (error "too many fixed results"))
1829 (unless (= (length info
) info-count
)
1830 (error "expected ~W info args" info-count
))
1832 (multiple-value-bind (acode abinds n-args
)
1833 (make-operand-list fixed-args
(car (last args
)) nil
)
1834 (multiple-value-bind (rcode rbinds n-results
)
1835 (make-operand-list fixed-results
(car (last results
)) t
)
1837 `(let* ((,n-node
,node
)
1839 (,n-template
(template-or-lose ',name
))
1844 (emit-template ,n-node
,n-block
,n-template
,n-args
,n-results
1849 ;;;; miscellaneous macros
1851 ;;; SC-Case TN {({(SC-Name*) | SC-Name | T} Form*)}*
1853 ;;; Case off of TN's SC. The first clause containing TN's SC is
1854 ;;; evaluated, returning the values of the last form. A clause
1855 ;;; beginning with T specifies a default. If it appears, it must be
1856 ;;; last. If no default is specified, and no clause matches, then an
1857 ;;; error is signalled.
1858 (def!macro sc-case
(tn &body forms
)
1859 (let ((n-sc (gensym))
1861 (collect ((clauses))
1862 (do ((cases forms
(rest cases
)))
1864 (clauses `(t (error "unknown SC to SC-CASE for ~S:~% ~S" ,n-tn
1865 (sc-name (tn-sc ,n-tn
))))))
1866 (let ((case (first cases
)))
1868 (error "illegal SC-CASE clause: ~S" case
))
1869 (let ((head (first case
)))
1872 (error "T case is not last in SC-CASE."))
1873 (clauses `(t nil
,@(rest case
)))
1875 (clauses `((or ,@(mapcar (lambda (x)
1876 `(eql ,(sc-number-or-lose x
) ,n-sc
))
1877 (if (atom head
) (list head
) head
)))
1878 nil
,@(rest case
))))))
1881 (,n-sc
(sc-number (tn-sc ,n-tn
))))
1882 (cond ,@(clauses))))))
1884 ;;; Return true if TNs SC is any of the named SCs, false otherwise.
1885 (defmacro sc-is
(tn &rest scs
)
1886 (once-only ((n-sc `(sc-number (tn-sc ,tn
))))
1887 `(or ,@(mapcar (lambda (x)
1888 `(eql ,n-sc
,(sc-number-or-lose x
)))
1891 ;;; Iterate over the IR2 blocks in component, in emission order.
1892 (defmacro do-ir2-blocks
((block-var component
&optional result
)
1894 `(do ((,block-var
(block-info (component-head ,component
))
1895 (ir2-block-next ,block-var
)))
1896 ((null ,block-var
) ,result
)
1899 ;;; Iterate over all the TNs live at some point, with the live set
1900 ;;; represented by a local conflicts bit-vector and the IR2-BLOCK
1901 ;;; containing the location.
1902 (defmacro do-live-tns
((tn-var live block
&optional result
) &body body
)
1903 (with-unique-names (conf bod i ltns
)
1904 (once-only ((n-live live
)
1907 (flet ((,bod
(,tn-var
) ,@body
))
1908 ;; Do component-live TNs.
1909 (dolist (,tn-var
(ir2-component-component-tns
1912 (ir2-block-block ,n-block
)))))
1915 (let ((,ltns
(ir2-block-local-tns ,n-block
)))
1916 ;; Do TNs always-live in this block and live :MORE TNs.
1917 (do ((,conf
(ir2-block-global-tns ,n-block
)
1918 (global-conflicts-next-blockwise ,conf
)))
1920 (when (or (eq (global-conflicts-kind ,conf
) :live
)
1921 (let ((,i
(global-conflicts-number ,conf
)))
1922 (and (eq (svref ,ltns
,i
) :more
)
1923 (not (zerop (sbit ,n-live
,i
))))))
1924 (,bod
(global-conflicts-tn ,conf
))))
1925 ;; Do TNs locally live in the designated live set.
1926 (dotimes (,i
(ir2-block-local-tn-count ,n-block
) ,result
)
1927 (unless (zerop (sbit ,n-live
,i
))
1928 (let ((,tn-var
(svref ,ltns
,i
)))
1929 (when (and ,tn-var
(not (eq ,tn-var
:more
)))
1930 (,bod
,tn-var
)))))))))))
1932 ;;; Iterate over all the IR2 blocks in PHYSENV, in emit order.
1933 (defmacro do-physenv-ir2-blocks
((block-var physenv
&optional result
)
1935 (once-only ((n-physenv physenv
))
1936 (once-only ((n-first `(lambda-block (physenv-lambda ,n-physenv
))))
1937 (once-only ((n-tail `(block-info
1939 (block-component ,n-first
)))))
1940 `(do ((,block-var
(block-info ,n-first
)
1941 (ir2-block-next ,block-var
)))
1942 ((or (eq ,block-var
,n-tail
)
1943 (not (eq (ir2-block-physenv ,block-var
) ,n-physenv
)))