1 ;;;; the VM definition of function call for the Sparc
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
15 ;;;; Interfaces to IR2 conversion:
17 ;;; Return a wired TN describing the N'th full call argument passing
19 (!def-vm-support-routine standard-arg-location (n)
20 (declare (type unsigned-byte n))
21 (if (< n register-arg-count)
22 (make-wired-tn *backend-t-primitive-type* register-arg-scn
23 (elt *register-arg-offsets* n))
24 (make-wired-tn *backend-t-primitive-type* control-stack-arg-scn n)))
27 ;;; Make a passing location TN for a local call return PC. If
28 ;;; standard is true, then use the standard (full call) location,
29 ;;; otherwise use any legal location. Even in the non-standard case,
30 ;;; this may be restricted by a desire to use a subroutine call
32 (!def-vm-support-routine make-return-pc-passing-location (standard)
34 (make-wired-tn *backend-t-primitive-type* register-arg-scn lra-offset)
35 (make-restricted-tn *backend-t-primitive-type* register-arg-scn)))
37 ;;; Similar to Make-Return-PC-Passing-Location, but makes a location
38 ;;; to pass Old-FP in. This is (obviously) wired in the standard
39 ;;; convention, but is totally unrestricted in non-standard
40 ;;; conventions, since we can always fetch it off of the stack using
42 (!def-vm-support-routine make-old-fp-passing-location (standard)
44 (make-wired-tn *fixnum-primitive-type* immediate-arg-scn ocfp-offset)
45 (make-normal-tn *fixnum-primitive-type*)))
47 ;;; Make the TNs used to hold Old-FP and Return-PC within the current
48 ;;; function. We treat these specially so that the debugger can find
49 ;;; them at a known location.
50 (!def-vm-support-routine make-old-fp-save-location (env)
52 (physenv-debug-live-tn (make-normal-tn *fixnum-primitive-type*) env)
53 (make-wired-tn *fixnum-primitive-type*
57 (!def-vm-support-routine make-return-pc-save-location (env)
59 (physenv-debug-live-tn (make-normal-tn *backend-t-primitive-type*) env)
60 (make-wired-tn *backend-t-primitive-type*
64 ;;; Make a TN for the standard argument count passing location. We
65 ;;; only need to make the standard location, since a count is never
66 ;;; passed when we are using non-standard conventions.
67 (!def-vm-support-routine make-arg-count-location ()
68 (make-wired-tn *fixnum-primitive-type* immediate-arg-scn nargs-offset))
71 ;;; Make a TN to hold the number-stack frame pointer. This is
72 ;;; allocated once per component, and is component-live.
73 (!def-vm-support-routine make-nfp-tn ()
75 (make-wired-tn *fixnum-primitive-type* immediate-arg-scn nfp-offset)))
77 (!def-vm-support-routine make-stack-pointer-tn ()
78 (make-normal-tn *fixnum-primitive-type*))
80 (!def-vm-support-routine make-number-stack-pointer-tn ()
81 (make-normal-tn *fixnum-primitive-type*))
83 ;;; Return a list of TNs that can be used to represent an
84 ;;; unknown-values continuation within a function.
85 (!def-vm-support-routine make-unknown-values-locations ()
86 (list (make-stack-pointer-tn)
87 (make-normal-tn *fixnum-primitive-type*)))
90 ;;; This function is called by the Entry-Analyze phase, allowing
91 ;;; VM-dependent initialization of the IR2-Component structure. We push
92 ;;; placeholder entries in the Constants to leave room for additional
93 ;;; noise in the code object header.
94 (!def-vm-support-routine select-component-format (component)
95 (declare (type component component))
96 (dotimes (i code-constants-offset)
97 (vector-push-extend nil
98 (ir2-component-constants (component-info component))))
103 ;;; Return the number of bytes needed for the current non-descriptor
104 ;;; stack frame. Non-descriptor stack frames must be multiples of 8
105 ;;; bytes on the PMAX.
106 (defun bytes-needed-for-non-descriptor-stack-frame ()
107 (* (logandc2 (1+ (sb-allocated-size 'non-descriptor-stack)) 1)
110 ;;; Used for setting up the Old-FP in local call.
111 (define-vop (current-fp)
112 (:results (val :scs (any-reg)))
116 ;;; Used for computing the caller's NFP for use in known-values return. Only
117 ;;; works assuming there is no variable size stuff on the nstack.
119 (define-vop (compute-old-nfp)
120 (:results (val :scs (any-reg)))
123 (let ((nfp (current-nfp-tn vop)))
125 (inst add val nfp (bytes-needed-for-non-descriptor-stack-frame))))))
128 (define-vop (xep-allocate-frame)
129 (:info start-lab copy-more-arg-follows)
130 (:ignore copy-more-arg-follows)
132 (:temporary (:scs (non-descriptor-reg)) temp)
134 ;; Make sure the function is aligned, and drop a label pointing to this
136 (align n-lowtag-bits)
137 (trace-table-entry trace-table-fun-prologue)
138 (emit-label start-lab)
139 ;; Allocate function header.
140 (inst simple-fun-header-word)
141 (dotimes (i (1- simple-fun-code-offset))
143 ;; The start of the actual code.
144 ;; Fix CODE, cause the function object was passed in.
145 (inst compute-code-from-fn code-tn code-tn start-lab temp)
146 ;; Build our stack frames.
147 (inst add csp-tn cfp-tn
148 (* n-word-bytes (sb-allocated-size 'control-stack)))
149 (let ((nfp-tn (current-nfp-tn vop)))
151 (inst sub nsp-tn (bytes-needed-for-non-descriptor-stack-frame))
152 (inst add nfp-tn nsp-tn number-stack-displacement)))
153 (trace-table-entry trace-table-normal)))
155 (define-vop (allocate-frame)
156 (:results (res :scs (any-reg))
157 (nfp :scs (any-reg)))
160 (trace-table-entry trace-table-fun-prologue)
162 (inst add csp-tn csp-tn
163 (* n-word-bytes (sb-allocated-size 'control-stack)))
164 (when (ir2-physenv-number-stack-p callee)
165 (inst sub nsp-tn (bytes-needed-for-non-descriptor-stack-frame))
166 (inst add nfp nsp-tn number-stack-displacement))
167 (trace-table-entry trace-table-normal)))
169 ;;; Allocate a partial frame for passing stack arguments in a full call. Nargs
170 ;;; is the number of arguments passed. If no stack arguments are passed, then
171 ;;; we don't have to do anything.
173 (define-vop (allocate-full-call-frame)
175 (:results (res :scs (any-reg)))
177 (when (> nargs register-arg-count)
179 (inst add csp-tn csp-tn (* nargs n-word-bytes)))))
184 ;;; Emit code needed at the return-point from an unknown-values call
185 ;;; for a fixed number of values. Values is the head of the TN-Ref
186 ;;; list for the locations that the values are to be received into.
187 ;;; Nvals is the number of values that are to be received (should
188 ;;; equal the length of Values).
190 ;;; Move-Temp is a Descriptor-Reg TN used as a temporary.
192 ;;; This code exploits the fact that in the unknown-values convention,
193 ;;; a single value return returns at the return PC + 8, whereas a
194 ;;; return of other than one value returns directly at the return PC.
196 ;;; If 0 or 1 values are expected, then we just emit an instruction to
197 ;;; reset the SP (which will only be executed when other than 1 value
200 ;;; In the general case, we have to do three things:
201 ;;; -- Default unsupplied register values. This need only be done when a
202 ;;; single value is returned, since register values are defaulted by the
203 ;;; called in the non-single case.
204 ;;; -- Default unsupplied stack values. This needs to be done whenever there
205 ;;; are stack values.
206 ;;; -- Reset SP. This must be done whenever other than 1 value is returned,
207 ;;; regardless of the number of values desired.
209 ;;; The general-case code looks like this:
211 b regs-defaulted ; Skip if MVs
214 move a1 null-tn ; Default register values
216 loadi nargs 1 ; Force defaulting of stack values
217 move old-fp csp ; Set up args for SP resetting
220 subcc temp nargs register-arg-count
222 b :lt default-value-7 ; jump to default code
223 loadw move-temp ocfp-tn 6 ; Move value to correct location.
225 store-stack-tn val4-tn move-temp
227 b :lt default-value-8
228 loadw move-temp ocfp-tn 7
230 store-stack-tn val5-tn move-temp
235 move csp ocfp ; Reset SP.
240 store-stack-tn val4-tn null-tn ; Nil out 7'th value. (first on stack)
243 store-stack-tn val5-tn null-tn ; Nil out 8'th value.
250 (defun default-unknown-values (vop values nvals move-temp temp lra-label)
251 (declare (type (or tn-ref null) values)
252 (type unsigned-byte nvals) (type tn move-temp temp))
255 (without-scheduling ()
256 (note-this-location vop :single-value-return)
257 (move csp-tn ocfp-tn)
259 (inst compute-code-from-lra code-tn code-tn lra-label temp))
260 (let ((regs-defaulted (gen-label))
261 (defaulting-done (gen-label))
262 (default-stack-vals (gen-label)))
263 ;; Branch off to the MV case.
264 (without-scheduling ()
265 (note-this-location vop :unknown-return)
266 (inst b regs-defaulted)
267 (if (> nvals register-arg-count)
268 (inst subcc temp nargs-tn (fixnumize register-arg-count))
269 (move csp-tn ocfp-tn)))
271 ;; Do the single value calse.
273 (val (tn-ref-across values) (tn-ref-across val)))
274 ((= i (min nvals register-arg-count)))
275 (move (tn-ref-tn val) null-tn))
276 (when (> nvals register-arg-count)
277 (inst b default-stack-vals)
278 (move ocfp-tn csp-tn))
280 (emit-label regs-defaulted)
281 (when (> nvals register-arg-count)
282 (collect ((defaults))
283 (do ((i register-arg-count (1+ i))
284 (val (do ((i 0 (1+ i))
285 (val values (tn-ref-across val)))
286 ((= i register-arg-count) val))
287 (tn-ref-across val)))
290 (let ((default-lab (gen-label))
291 (tn (tn-ref-tn val)))
292 (defaults (cons default-lab tn))
294 (inst b :le default-lab)
295 (inst ld move-temp ocfp-tn (* i n-word-bytes))
296 (inst subcc temp (fixnumize 1))
297 (store-stack-tn tn move-temp)))
299 (emit-label defaulting-done)
300 (move csp-tn ocfp-tn)
302 (let ((defaults (defaults)))
304 (assemble (*elsewhere*)
305 (emit-label default-stack-vals)
306 (trace-table-entry trace-table-fun-prologue)
307 (do ((remaining defaults (cdr remaining)))
309 (let ((def (car remaining)))
310 (emit-label (car def))
311 (when (null (cdr remaining))
312 (inst b defaulting-done))
313 (store-stack-tn (cdr def) null-tn)))
314 (trace-table-entry trace-table-normal))))))
316 (inst compute-code-from-lra code-tn code-tn lra-label temp)))
320 ;;; Receive-Unknown-Values -- Internal
322 ;;; Emit code needed at the return point for an unknown-values call
323 ;;; for an arbitrary number of values.
325 ;;; We do the single and non-single cases with no shared code: there
326 ;;; doesn't seem to be any potential overlap, and receiving a single
327 ;;; value is more important efficiency-wise.
329 ;;; When there is a single value, we just push it on the stack,
330 ;;; returning the old SP and 1.
332 ;;; When there is a variable number of values, we move all of the
333 ;;; argument registers onto the stack, and return Args and Nargs.
335 ;;; Args and Nargs are TNs wired to the named locations. We must
336 ;;; explicitly allocate these TNs, since their lifetimes overlap with
337 ;;; the results Start and Count (also, it's nice to be able to target
339 (defun receive-unknown-values (args nargs start count lra-label temp)
340 (declare (type tn args nargs start count temp))
341 (let ((variable-values (gen-label))
343 (without-scheduling ()
344 (inst b variable-values)
347 (inst compute-code-from-lra code-tn code-tn lra-label temp)
349 (storew (first *register-arg-tns*) csp-tn -1)
350 (inst sub start csp-tn 4)
351 (inst li count (fixnumize 1))
355 (assemble (*elsewhere*)
356 (trace-table-entry trace-table-fun-prologue)
357 (emit-label variable-values)
358 (inst compute-code-from-lra code-tn code-tn lra-label temp)
359 (do ((arg *register-arg-tns* (rest arg))
362 (storew (first arg) args i))
367 (trace-table-entry trace-table-normal)))
371 ;;; VOP that can be inherited by unknown values receivers. The main
372 ;;; thing this handles is allocation of the result temporaries.
373 (define-vop (unknown-values-receiver)
375 (start :scs (any-reg))
376 (count :scs (any-reg)))
377 (:temporary (:sc descriptor-reg :offset ocfp-offset
378 :from :eval :to (:result 0))
380 (:temporary (:sc any-reg :offset nargs-offset
381 :from :eval :to (:result 1))
383 (:temporary (:scs (non-descriptor-reg)) temp))
387 ;;;; Local call with unknown values convention return:
389 ;;; Non-TR local call for a fixed number of values passed according to the
390 ;;; unknown values convention.
392 ;;; Args are the argument passing locations, which are specified only to
393 ;;; terminate their lifetimes in the caller.
395 ;;; Values are the return value locations (wired to the standard passing
398 ;;; Save is the save info, which we can ignore since saving has been done.
399 ;;; Return-PC is the TN that the return PC should be passed in.
400 ;;; Target is a continuation pointing to the start of the called function.
401 ;;; Nvals is the number of values received.
403 ;;; Note: we can't use normal load-tn allocation for the fixed args, since all
404 ;;; registers may be tied up by the more operand. Instead, we use
405 ;;; MAYBE-LOAD-STACK-TN.
406 (define-vop (call-local)
410 (:results (values :more t))
412 (:move-args :local-call)
413 (:info arg-locs callee target nvals)
415 (:temporary (:scs (descriptor-reg) :from (:eval 0)) move-temp)
416 (:temporary (:scs (non-descriptor-reg)) temp)
417 (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save)
418 (:temporary (:sc any-reg :offset ocfp-offset :from (:eval 0)) ocfp)
419 (:ignore arg-locs args ocfp)
421 (trace-table-entry trace-table-call-site)
422 (let ((label (gen-label))
423 (cur-nfp (current-nfp-tn vop)))
425 (store-stack-tn nfp-save cur-nfp))
426 (let ((callee-nfp (callee-nfp-tn callee)))
428 (maybe-load-stack-tn callee-nfp nfp)))
429 (maybe-load-stack-tn cfp-tn fp)
430 (inst compute-lra-from-code
431 (callee-return-pc-tn callee) code-tn label temp)
432 (note-this-location vop :call-site)
435 (emit-return-pc label)
436 (default-unknown-values vop values nvals move-temp temp label)
438 (load-stack-tn cur-nfp nfp-save)))
439 (trace-table-entry trace-table-normal)))
442 ;;; Non-TR local call for a variable number of return values passed according
443 ;;; to the unknown values convention. The results are the start of the values
444 ;;; glob and the number of values received.
446 ;;; Note: we can't use normal load-tn allocation for the fixed args, since all
447 ;;; registers may be tied up by the more operand. Instead, we use
448 ;;; MAYBE-LOAD-STACK-TN.
449 (define-vop (multiple-call-local unknown-values-receiver)
454 (:move-args :local-call)
455 (:info save callee target)
458 (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save)
460 (trace-table-entry trace-table-call-site)
461 (let ((label (gen-label))
462 (cur-nfp (current-nfp-tn vop)))
464 (store-stack-tn nfp-save cur-nfp))
465 (let ((callee-nfp (callee-nfp-tn callee)))
467 (maybe-load-stack-tn callee-nfp nfp)))
468 (maybe-load-stack-tn cfp-tn fp)
469 (inst compute-lra-from-code
470 (callee-return-pc-tn callee) code-tn label temp)
471 (note-this-location vop :call-site)
474 (emit-return-pc label)
475 (note-this-location vop :unknown-return)
476 (receive-unknown-values values-start nvals start count label temp)
478 (load-stack-tn cur-nfp nfp-save)))
479 (trace-table-entry trace-table-normal)))
482 ;;;; Local call with known values return:
484 ;;; Non-TR local call with known return locations. Known-value return works
485 ;;; just like argument passing in local call.
487 ;;; Note: we can't use normal load-tn allocation for the fixed args, since all
488 ;;; registers may be tied up by the more operand. Instead, we use
489 ;;; MAYBE-LOAD-STACK-TN.
490 (define-vop (known-call-local)
494 (:results (res :more t))
495 (:move-args :local-call)
497 (:info save callee target)
498 (:ignore args res save)
500 (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save)
501 (:temporary (:scs (non-descriptor-reg)) temp)
503 (trace-table-entry trace-table-call-site)
504 (let ((label (gen-label))
505 (cur-nfp (current-nfp-tn vop)))
507 (store-stack-tn nfp-save cur-nfp))
508 (let ((callee-nfp (callee-nfp-tn callee)))
510 (maybe-load-stack-tn callee-nfp nfp)))
511 (maybe-load-stack-tn cfp-tn fp)
512 (inst compute-lra-from-code
513 (callee-return-pc-tn callee) code-tn label temp)
514 (note-this-location vop :call-site)
517 (emit-return-pc label)
518 (note-this-location vop :known-return)
520 (load-stack-tn cur-nfp nfp-save)))
521 (trace-table-entry trace-table-normal)))
523 ;;; Return from known values call. We receive the return locations as
524 ;;; arguments to terminate their lifetimes in the returning function. We
525 ;;; restore FP and CSP and jump to the Return-PC.
527 ;;; Note: we can't use normal load-tn allocation for the fixed args, since all
528 ;;; registers may be tied up by the more operand. Instead, we use
529 ;;; MAYBE-LOAD-STACK-TN.
530 (define-vop (known-return)
531 (:args (old-fp :target old-fp-temp)
532 (return-pc :target return-pc-temp)
534 (:temporary (:sc any-reg :from (:argument 0)) old-fp-temp)
535 (:temporary (:sc descriptor-reg :from (:argument 1)) return-pc-temp)
536 (:move-args :known-return)
538 (:ignore val-locs vals)
541 (trace-table-entry trace-table-fun-epilogue)
542 (maybe-load-stack-tn old-fp-temp old-fp)
543 (maybe-load-stack-tn return-pc-temp return-pc)
545 (let ((cur-nfp (current-nfp-tn vop)))
547 (inst add nsp-tn cur-nfp
548 (- (bytes-needed-for-non-descriptor-stack-frame)
549 number-stack-displacement))))
550 (inst j return-pc-temp (- n-word-bytes other-pointer-lowtag))
551 (move cfp-tn old-fp-temp)
552 (trace-table-entry trace-table-normal)))
557 ;;; There is something of a cross-product effect with full calls.
558 ;;; Different versions are used depending on whether we know the
559 ;;; number of arguments or the name of the called function, and
560 ;;; whether we want fixed values, unknown values, or a tail call.
562 ;;; In full call, the arguments are passed creating a partial frame on
563 ;;; the stack top and storing stack arguments into that frame. On
564 ;;; entry to the callee, this partial frame is pointed to by FP. If
565 ;;; there are no stack arguments, we don't bother allocating a partial
566 ;;; frame, and instead set FP to SP just before the call.
568 ;;; This macro helps in the definition of full call VOPs by avoiding code
569 ;;; replication in defining the cross-product VOPs.
571 ;;; Name is the name of the VOP to define.
573 ;;; Named is true if the first argument is a symbol whose global function
574 ;;; definition is to be called.
576 ;;; Return is either :Fixed, :Unknown or :Tail:
577 ;;; -- If :Fixed, then the call is for a fixed number of values, returned in
578 ;;; the standard passing locations (passed as result operands).
579 ;;; -- If :Unknown, then the result values are pushed on the stack, and the
580 ;;; result values are specified by the Start and Count as in the
581 ;;; unknown-values continuation representation.
582 ;;; -- If :Tail, then do a tail-recursive call. No values are returned.
583 ;;; The Old-Fp and Return-PC are passed as the second and third arguments.
585 ;;; In non-tail calls, the pointer to the stack arguments is passed as the last
586 ;;; fixed argument. If Variable is false, then the passing locations are
587 ;;; passed as a more arg. Variable is true if there are a variable number of
588 ;;; arguments passed on the stack. Variable cannot be specified with :Tail
589 ;;; return. TR variable argument call is implemented separately.
591 ;;; In tail call with fixed arguments, the passing locations are passed as a
592 ;;; more arg, but there is no new-FP, since the arguments have been set up in
593 ;;; the current frame.
594 (defmacro define-full-call (name named return variable)
595 (assert (not (and variable (eq return :tail))))
597 ,@(when (eq return :unknown)
598 '(unknown-values-receiver)))
600 ,@(unless (eq return :tail)
601 '((new-fp :scs (any-reg) :to :eval)))
604 '(name :target name-pass)
605 '(arg-fun :target lexenv))
607 ,@(when (eq return :tail)
608 '((old-fp :target old-fp-pass)
609 (return-pc :target return-pc-pass)))
611 ,@(unless variable '((args :more t :scs (descriptor-reg)))))
613 ,@(when (eq return :fixed)
614 '((:results (values :more t))))
616 (:save-p ,(if (eq return :tail) :compute-only t))
618 ,@(unless (or (eq return :tail) variable)
619 '((:move-args :full-call)))
622 (:info ,@(unless (or variable (eq return :tail)) '(arg-locs))
623 ,@(unless variable '(nargs))
624 ,@(when (eq return :fixed) '(nvals)))
627 ,@(unless (or variable (eq return :tail)) '(arg-locs))
628 ,@(unless variable '(args)))
630 (:temporary (:sc descriptor-reg
633 ,@(unless (eq return :fixed)
637 (:temporary (:sc descriptor-reg
639 :from (:argument ,(if (eq return :tail) 2 1))
644 `(:temporary (:sc descriptor-reg :offset cname-offset
645 :from (:argument ,(if (eq return :tail) 0 1))
648 `(:temporary (:sc descriptor-reg :offset lexenv-offset
649 :from (:argument ,(if (eq return :tail) 0 1))
653 (:temporary (:scs (descriptor-reg) :from (:argument 0) :to :eval)
655 (:temporary (:sc any-reg :offset nargs-offset :to :eval)
659 (mapcar #'(lambda (name offset)
660 `(:temporary (:sc descriptor-reg
664 register-arg-names *register-arg-offsets*))
665 ,@(when (eq return :fixed)
666 '((:temporary (:scs (descriptor-reg) :from :eval) move-temp)))
668 ,@(unless (eq return :tail)
669 '((:temporary (:scs (non-descriptor-reg)) temp)
670 (:temporary (:sc control-stack :offset nfp-save-offset) nfp-save)))
672 (:generator ,(+ (if named 5 0)
674 (if (eq return :tail) 0 10)
676 (if (eq return :unknown) 25 0))
677 (trace-table-entry trace-table-call-site)
678 (let* ((cur-nfp (current-nfp-tn vop))
679 ,@(unless (eq return :tail)
680 '((lra-label (gen-label))))
684 ,@(if (eq return :tail)
685 '((unless (location= old-fp old-fp-pass)
687 (unless (location= return-pc
697 (flet ((do-next-filler ()
698 (let* ((next (pop filler))
699 (what (if (consp next) (car next) next)))
703 `((inst sub nargs-pass csp-tn new-fp)
705 (mapcar #'(lambda (name)
708 register-arg-names)))
709 '((inst li nargs-pass (fixnumize nargs)))))
710 ,@(if (eq return :tail)
714 (inst move old-fp-pass old-fp))
716 (loadw old-fp-pass cfp-tn
717 (tn-offset old-fp)))))
721 (inst move return-pc-pass return-pc))
723 (loadw return-pc-pass cfp-tn
724 (tn-offset return-pc)))))
726 (inst add nsp-tn cur-nfp
727 (- (bytes-needed-for-non-descriptor-stack-frame)
728 number-stack-displacement))))
730 (inst compute-lra-from-code
731 return-pc-pass code-tn lra-label temp))
733 (store-stack-tn nfp-save cur-nfp))
735 (inst move old-fp-pass cfp-tn))
738 '(move cfp-tn new-fp)
739 '(if (> nargs register-arg-count)
741 (move cfp-tn csp-tn))))))
746 (descriptor-reg (move name-pass name))
748 (loadw name-pass cfp-tn (tn-offset name))
751 (loadw name-pass code-tn (tn-offset name)
752 other-pointer-lowtag)
754 (loadw function name-pass fdefn-raw-addr-slot
755 other-pointer-lowtag)
758 (descriptor-reg (move lexenv arg-fun))
760 (loadw lexenv cfp-tn (tn-offset arg-fun))
763 (loadw lexenv code-tn (tn-offset arg-fun)
764 other-pointer-lowtag)
766 (loadw function lexenv closure-fun-slot
774 (note-this-location vop :call-site)
776 (- (ash simple-fun-code-offset word-shift)
778 (inst move code-tn function))
782 '((emit-return-pc lra-label)
783 (default-unknown-values vop values nvals move-temp
786 (load-stack-tn cur-nfp nfp-save))))
788 '((emit-return-pc lra-label)
789 (note-this-location vop :unknown-return)
790 (receive-unknown-values values-start nvals start count
793 (load-stack-tn cur-nfp nfp-save))))
795 (trace-table-entry trace-table-normal))))
798 (define-full-call call nil :fixed nil)
799 (define-full-call call-named t :fixed nil)
800 (define-full-call multiple-call nil :unknown nil)
801 (define-full-call multiple-call-named t :unknown nil)
802 (define-full-call tail-call nil :tail nil)
803 (define-full-call tail-call-named t :tail nil)
805 (define-full-call call-variable nil :fixed t)
806 (define-full-call multiple-call-variable nil :unknown t)
809 ;;; Defined separately, since needs special code that BLT's the
811 (define-vop (tail-call-variable)
813 (args-arg :scs (any-reg) :target args)
814 (function-arg :scs (descriptor-reg) :target lexenv)
815 (old-fp-arg :scs (any-reg) :target old-fp)
816 (lra-arg :scs (descriptor-reg) :target lra))
818 (:temporary (:sc any-reg :offset nl0-offset :from (:argument 0)) args)
819 (:temporary (:sc any-reg :offset lexenv-offset :from (:argument 1)) lexenv)
820 (:temporary (:sc any-reg :offset ocfp-offset :from (:argument 2)) old-fp)
821 (:temporary (:sc any-reg :offset lra-offset :from (:argument 3)) lra)
823 (:temporary (:scs (any-reg) :from :eval) temp)
829 ;; Move these into the passing locations if they are not already there.
831 (move lexenv function-arg)
832 (move old-fp old-fp-arg)
835 ;; Clear the number stack if anything is there.
836 (let ((cur-nfp (current-nfp-tn vop)))
838 (inst add nsp-tn cur-nfp
839 (- (bytes-needed-for-non-descriptor-stack-frame)
840 number-stack-displacement))))
842 ;; And jump to the assembly-routine that does the bliting.
843 (inst ji temp (make-fixup 'tail-call-variable :assembly-routine))
847 ;;;; Unknown values return:
850 ;;; Return a single value using the unknown-values convention.
851 (define-vop (return-single)
852 (:args (old-fp :scs (any-reg))
853 (return-pc :scs (descriptor-reg))
858 (trace-table-entry trace-table-fun-epilogue)
859 ;; Clear the number stack.
860 (let ((cur-nfp (current-nfp-tn vop)))
862 (inst add nsp-tn cur-nfp
863 (- (bytes-needed-for-non-descriptor-stack-frame)
864 number-stack-displacement))))
865 ;; Clear the control stack, and restore the frame pointer.
869 (lisp-return return-pc :offset 2)
870 (trace-table-entry trace-table-normal)))
872 ;;; Do unknown-values return of a fixed number of values. The Values are
873 ;;; required to be set up in the standard passing locations. Nvals is the
874 ;;; number of values returned.
876 ;;; If returning a single value, then deallocate the current frame, restore
877 ;;; FP and jump to the single-value entry at Return-PC + 8.
879 ;;; If returning other than one value, then load the number of values returned,
880 ;;; NIL out unsupplied values registers, restore FP and return at Return-PC.
881 ;;; When there are stack values, we must initialize the argument pointer to
882 ;;; point to the beginning of the values block (which is the beginning of the
886 (old-fp :scs (any-reg))
887 (return-pc :scs (descriptor-reg) :to (:eval 1))
891 (:temporary (:sc descriptor-reg :offset a0-offset :from (:eval 0)) a0)
892 (:temporary (:sc descriptor-reg :offset a1-offset :from (:eval 0)) a1)
893 (:temporary (:sc descriptor-reg :offset a2-offset :from (:eval 0)) a2)
894 (:temporary (:sc descriptor-reg :offset a3-offset :from (:eval 0)) a3)
895 (:temporary (:sc descriptor-reg :offset a4-offset :from (:eval 0)) a4)
896 (:temporary (:sc descriptor-reg :offset a5-offset :from (:eval 0)) a5)
897 (:temporary (:sc any-reg :offset nargs-offset) nargs)
898 (:temporary (:sc any-reg :offset ocfp-offset) val-ptr)
901 (trace-table-entry trace-table-fun-epilogue)
902 ;; Clear the number stack.
903 (let ((cur-nfp (current-nfp-tn vop)))
905 (inst add nsp-tn cur-nfp
906 (- (bytes-needed-for-non-descriptor-stack-frame)
907 number-stack-displacement))))
909 ;; Clear the control stack, and restore the frame pointer.
913 (lisp-return return-pc :offset 2))
915 ;; Establish the values pointer and values count.
916 (move val-ptr cfp-tn)
917 (inst li nargs (fixnumize nvals))
918 ;; restore the frame pointer and clear as much of the control
919 ;; stack as possible.
921 (inst add csp-tn val-ptr (* nvals n-word-bytes))
922 ;; pre-default any argument register that need it.
923 (when (< nvals register-arg-count)
924 (dolist (reg (subseq (list a0 a1 a2 a3 a4 a5) nvals))
927 (lisp-return return-pc)))
928 (trace-table-entry trace-table-normal)))
930 ;;; Do unknown-values return of an arbitrary number of values (passed on the
931 ;;; stack.) We check for the common case of a single return value, and do that
932 ;;; inline using the normal single value return convention. Otherwise, we
933 ;;; branch off to code that calls an assembly-routine.
934 (define-vop (return-multiple)
936 (old-fp-arg :scs (any-reg) :to (:eval 1))
937 (lra-arg :scs (descriptor-reg) :to (:eval 1))
938 (vals-arg :scs (any-reg) :target vals)
939 (nvals-arg :scs (any-reg) :target nvals))
941 (:temporary (:sc any-reg :offset nl1-offset :from (:argument 0)) old-fp)
942 (:temporary (:sc descriptor-reg :offset lra-offset :from (:argument 1)) lra)
943 (:temporary (:sc any-reg :offset nl0-offset :from (:argument 2)) vals)
944 (:temporary (:sc any-reg :offset nargs-offset :from (:argument 3)) nvals)
945 (:temporary (:sc descriptor-reg :offset a0-offset) a0)
947 (:temporary (:scs (any-reg) :from (:eval 1)) temp)
952 (trace-table-entry trace-table-fun-epilogue)
953 (let ((not-single (gen-label)))
954 ;; Clear the number stack.
955 (let ((cur-nfp (current-nfp-tn vop)))
957 (inst add nsp-tn cur-nfp
958 (- (bytes-needed-for-non-descriptor-stack-frame)
959 number-stack-displacement))))
961 ;; Check for the single case.
962 (inst cmp nvals-arg (fixnumize 1))
963 (inst b :ne not-single)
964 (inst ld a0 vals-arg)
966 ;; Return with one value.
968 (move cfp-tn old-fp-arg)
969 (lisp-return lra-arg :offset 2)
971 ;; Nope, not the single case.
972 (emit-label not-single)
973 (move old-fp old-fp-arg)
976 (move nvals nvals-arg)
977 (inst ji temp (make-fixup 'return-multiple :assembly-routine))
979 (trace-table-entry trace-table-normal)))
986 ;;; We don't need to do anything special for regular functions.
987 (define-vop (setup-environment)
991 ;; Don't bother doing anything.
994 ;;; Get the lexical environment from it's passing location.
995 (define-vop (setup-closure-environment)
996 (:temporary (:sc descriptor-reg :offset lexenv-offset :target closure
999 (:results (closure :scs (descriptor-reg)))
1004 (move closure lexenv)))
1006 ;;; Copy a more arg from the argument area to the end of the current frame.
1007 ;;; Fixed is the number of non-more arguments.
1008 (define-vop (copy-more-arg)
1009 (:temporary (:sc any-reg :offset nl0-offset) result)
1010 (:temporary (:sc any-reg :offset nl1-offset) count)
1011 (:temporary (:sc any-reg :offset nl2-offset) src)
1012 (:temporary (:sc any-reg :offset nl3-offset) dst)
1013 (:temporary (:sc descriptor-reg :offset l0-offset) temp)
1016 (let ((loop (gen-label))
1017 (do-regs (gen-label))
1019 (when (< fixed register-arg-count)
1020 ;; Save a pointer to the results so we can fill in register args.
1021 ;; We don't need this if there are more fixed args than reg args.
1022 (move result csp-tn))
1023 ;; Allocate the space on the stack.
1024 (cond ((zerop fixed)
1027 (inst add csp-tn csp-tn nargs-tn))
1029 (inst subcc count nargs-tn (fixnumize fixed))
1032 (inst add csp-tn csp-tn count)))
1033 (when (< fixed register-arg-count)
1034 ;; We must stop when we run out of stack args, not when we run out of
1036 (inst subcc count nargs-tn (fixnumize register-arg-count))
1037 ;; Everything of interest in registers.
1038 (inst b :le do-regs))
1039 ;; Initialize dst to be end of stack.
1041 ;; Initialize src to be end of args.
1042 (inst add src cfp-tn nargs-tn)
1045 ;; *--dst = *--src, --count
1046 (inst add src src (- n-word-bytes))
1047 (inst subcc count count (fixnumize 1))
1049 (inst add dst dst (- n-word-bytes))
1053 (emit-label do-regs)
1054 (when (< fixed register-arg-count)
1055 ;; Now we have to deposit any more args that showed up in registers.
1056 (inst subcc count nargs-tn (fixnumize fixed))
1057 (do ((i fixed (1+ i)))
1058 ((>= i register-arg-count))
1059 ;; Don't deposit any more than there are.
1061 (inst subcc count (fixnumize 1))
1062 ;; Store it relative to the pointer saved at the start.
1063 (storew (nth i *register-arg-tns*) result (- i fixed))))
1064 (emit-label done))))
1067 ;;; More args are stored consequtively on the stack, starting immediately at
1068 ;;; the context pointer. The context pointer is not typed, so the lowtag is 0.
1069 (define-vop (more-arg word-index-ref)
1071 (:translate %more-arg))
1074 ;;; Turn more arg (context, count) into a list.
1075 (define-vop (listify-rest-args)
1076 (:args (context-arg :target context :scs (descriptor-reg))
1077 (count-arg :target count :scs (any-reg)))
1078 (:arg-types * tagged-num)
1079 (:temporary (:scs (any-reg) :from (:argument 0)) context)
1080 (:temporary (:scs (any-reg) :from (:argument 1)) count)
1081 (:temporary (:scs (descriptor-reg) :from :eval) temp)
1082 (:temporary (:scs (non-descriptor-reg) :from :eval) dst)
1083 (:results (result :scs (descriptor-reg)))
1084 (:translate %listify-rest-args)
1087 (move context context-arg)
1088 (move count count-arg)
1089 ;; Check to see if there are any arguments.
1092 (move result null-tn)
1094 ;; We need to do this atomically.
1097 ;; Allocate a cons (2 words) for each item.
1098 (inst andn result alloc-tn lowtag-mask)
1099 (inst or result list-pointer-lowtag)
1101 (inst sll temp count 1)
1103 (inst add alloc-tn temp)
1105 ;; Compute the next cons and store it in the current one.
1107 (inst add dst dst (* 2 n-word-bytes))
1108 (storew dst dst -1 list-pointer-lowtag)
1112 (loadw temp context)
1113 (inst add context context n-word-bytes)
1115 ;; Dec count, and if != zero, go back for more.
1116 (inst subcc count (fixnumize 1))
1119 ;; Store the value into the car of the current cons (in the delay
1121 (storew temp dst 0 list-pointer-lowtag)
1123 ;; NIL out the last cons.
1124 (storew null-tn dst 1 list-pointer-lowtag)))
1128 ;;; Return the location and size of the more arg glob created by Copy-More-Arg.
1129 ;;; Supplied is the total number of arguments supplied (originally passed in
1130 ;;; NARGS.) Fixed is the number of non-rest arguments.
1132 ;;; We must duplicate some of the work done by Copy-More-Arg, since at that
1133 ;;; time the environment is in a pretty brain-damaged state, preventing this
1134 ;;; info from being returned as values. What we do is compute
1135 ;;; supplied - fixed, and return a pointer that many words below the current
1137 (define-vop (more-arg-context)
1138 (:policy :fast-safe)
1139 (:translate sb!c::%more-arg-context)
1140 (:args (supplied :scs (any-reg)))
1141 (:arg-types tagged-num (:constant fixnum))
1143 (:results (context :scs (descriptor-reg))
1144 (count :scs (any-reg)))
1145 (:result-types t tagged-num)
1146 (:note "more-arg-context")
1148 (inst sub count supplied (fixnumize fixed))
1149 (inst sub context csp-tn count)))
1152 ;;; Signal wrong argument count error if Nargs isn't = to Count.
1154 (define-vop (verify-arg-count)
1155 (:policy :fast-safe)
1156 (:translate sb!c::%verify-arg-count)
1157 (:args (nargs :scs (any-reg)))
1158 (:arg-types positive-fixnum (:constant t))
1161 (:save-p :compute-only)
1164 (generate-error-code vop invalid-arg-count-error nargs)))
1165 (inst cmp nargs (fixnumize count))
1166 ;; Assume we don't take the branch
1167 (inst b :ne err-lab #!+sparc-v9 :pn)
1170 ;;; Signal various errors.
1171 (macrolet ((frob (name error translate &rest args)
1172 `(define-vop (,name)
1174 `((:policy :fast-safe)
1175 (:translate ,translate)))
1176 (:args ,@(mapcar #'(lambda (arg)
1177 `(,arg :scs (any-reg descriptor-reg)))
1180 (:save-p :compute-only)
1182 (error-call vop ,error ,@args)))))
1183 (frob arg-count-error invalid-arg-count-error
1184 sb!c::%arg-count-error nargs)
1185 (frob type-check-error object-not-type-error sb!c::%type-check-error
1187 (frob layout-invalid-error layout-invalid-error sb!c::%layout-invalid-error
1189 (frob odd-key-args-error odd-key-args-error
1190 sb!c::%odd-key-args-error)
1191 (frob unknown-key-arg-error unknown-key-arg-error
1192 sb!c::%unknown-key-arg-error key)
1193 (frob nil-fun-returned-error nil-fun-returned-error nil fun))