1 ;;;; the VM definition of function call for the Alpha
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.
14 ;;;; interfaces to IR2 conversion
16 ;;; Return a wired TN describing the N'th full call argument passing
18 (!def-vm-support-routine standard-arg-location
(n)
19 (declare (type unsigned-byte n
))
20 (if (< n register-arg-count
)
21 (make-wired-tn *backend-t-primitive-type
*
23 (elt *register-arg-offsets
* n
))
24 (make-wired-tn *backend-t-primitive-type
*
25 control-stack-arg-scn n
)))
28 ;;; Make a passing location TN for a local call return PC. If standard
29 ;;; is true, then use the standard (full call) location, otherwise use
30 ;;; any legal location. Even in the non-standard case, this may be
31 ;;; restricted by a desire to use a subroutine call instruction.
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 ;;; This is similar to MAKE-RETURN-PC-PASSING-LOCATION, but makes a
38 ;;; location to pass OLD-FP in. This is (obviously) wired in the
39 ;;; standard 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 ;;; These functions make the TNs used to hold Old-FP and Return-PC
48 ;;; within the current function. We treat these specially so that the
49 ;;; debugger can find 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
*
56 (!def-vm-support-routine make-return-pc-save-location
(env)
57 (let ((ptype *backend-t-primitive-type
*))
59 (physenv-debug-live-tn (make-normal-tn ptype
) env
)
60 (make-wired-tn ptype control-stack-arg-scn lra-save-offset
))))
62 ;;; Make a TN for the standard argument count passing location. We
63 ;;; only need to make the standard location, since a count is never
64 ;;; passed when we are using non-standard conventions.
65 (!def-vm-support-routine make-arg-count-location
()
66 (make-wired-tn *fixnum-primitive-type
* immediate-arg-scn nargs-offset
))
69 ;;; Make a TN to hold the number-stack frame pointer. This is
70 ;;; allocated once per component, and is component-live.
71 (!def-vm-support-routine make-nfp-tn
()
73 (make-wired-tn *fixnum-primitive-type
* immediate-arg-scn nfp-offset
)))
75 (!def-vm-support-routine make-stack-pointer-tn
()
76 (make-normal-tn *fixnum-primitive-type
*))
78 (!def-vm-support-routine make-number-stack-pointer-tn
()
79 (make-normal-tn *fixnum-primitive-type
*))
81 ;;; Return a list of TNs that can be used to represent an
82 ;;; unknown-values continuation within a function.
83 (!def-vm-support-routine make-unknown-values-locations
()
84 (list (make-stack-pointer-tn)
85 (make-normal-tn *fixnum-primitive-type
*)))
88 ;;; This function is called by the ENTRY-ANALYZE phase, allowing
89 ;;; VM-dependent initialization of the IR2-COMPONENT structure. We
90 ;;; push placeholder entries in the CONSTANTS to leave room for
91 ;;; additional noise in the code object header.
92 (!def-vm-support-routine select-component-format
(component)
93 (declare (type component component
))
94 (dotimes (i code-constants-offset
)
95 (vector-push-extend nil
96 (ir2-component-constants (component-info component
))))
102 ;;; Return the number of bytes needed for the current non-descriptor
103 ;;; stack frame. Non-descriptor stack frames must be multiples of 8
104 ;;; bytes on the PMAX.
105 (defun bytes-needed-for-non-descriptor-stack-frame ()
106 (* (logandc2 (1+ (sb-allocated-size 'non-descriptor-stack
)) 1)
109 ;;; This is used for setting up the Old-FP in local call.
110 (define-vop (current-fp)
111 (:results
(val :scs
(any-reg)))
115 ;;; This is used for computing the caller's NFP for use in
116 ;;; known-values return. It only works assuming there is no variable
117 ;;; size stuff on the nstack.
118 (define-vop (compute-old-nfp)
119 (:results
(val :scs
(any-reg)))
122 (let ((nfp (current-nfp-tn vop
)))
124 (inst addq nfp
(bytes-needed-for-non-descriptor-stack-frame) val
)))))
126 (define-vop (xep-allocate-frame)
127 (:info start-lab copy-more-arg-follows
)
128 (:ignore copy-more-arg-follows
)
130 (:temporary
(:scs
(non-descriptor-reg)) temp
)
132 ;; Make sure the function is aligned, and drop a label pointing to
133 ;; this function header.
134 (emit-alignment n-lowtag-bits
)
135 (trace-table-entry trace-table-fun-prologue
)
136 (emit-label start-lab
)
137 ;; Allocate function header.
138 (inst simple-fun-header-word
)
139 (dotimes (i (1- simple-fun-code-offset
))
141 ;; The start of the actual code.
142 ;; Compute CODE from the address of this entry point.
143 (let ((entry-point (gen-label)))
144 (emit-label entry-point
)
145 (inst compute-code-from-lip code-tn lip-tn entry-point temp
)
146 ;; ### We should also save it on the stack so that the garbage
147 ;; collector won't forget about us if we call anyone else.
149 ;; Build our stack frames.
152 (* n-word-bytes
(sb-allocated-size 'control-stack
))
154 (let ((nfp (current-nfp-tn vop
)))
156 (inst subq nsp-tn
(bytes-needed-for-non-descriptor-stack-frame)
159 (trace-table-entry trace-table-normal
)))
161 (define-vop (allocate-frame)
162 (:results
(res :scs
(any-reg))
163 (nfp :scs
(any-reg)))
166 (trace-table-entry trace-table-fun-prologue
)
170 (* n-word-bytes
(sb-allocated-size 'control-stack
))
172 (when (ir2-physenv-number-stack-p callee
)
173 (inst subq nsp-tn
(bytes-needed-for-non-descriptor-stack-frame)
176 (trace-table-entry trace-table-normal
)))
178 ;;; Allocate a partial frame for passing stack arguments in a full
179 ;;; call. NARGS is the number of arguments passed. If no stack
180 ;;; arguments are passed, then we don't have to do anything.
181 (define-vop (allocate-full-call-frame)
183 (:results
(res :scs
(any-reg)))
185 (when (> nargs register-arg-count
)
187 (inst lda csp-tn
(* nargs n-word-bytes
) csp-tn
))))
189 ;;; Emit code needed at the return-point from an unknown-values call
190 ;;; for a fixed number of values. Values is the head of the TN-REF
191 ;;; list for the locations that the values are to be received into.
192 ;;; Nvals is the number of values that are to be received (should
193 ;;; equal the length of Values).
195 ;;; Move-Temp is a Descriptor-Reg TN used as a temporary.
197 ;;; This code exploits the fact that in the unknown-values convention,
198 ;;; a single value return returns at the return PC + 8, whereas a
199 ;;; return of other than one value returns directly at the return PC.
201 ;;; If 0 or 1 values are expected, then we just emit an instruction to
202 ;;; reset the SP (which will only be executed when other than 1 value
205 ;;; In the general case, we have to do three things:
206 ;;; -- Default unsupplied register values. This need only be done when a
207 ;;; single value is returned, since register values are defaulted by the
208 ;;; called in the non-single case.
209 ;;; -- Default unsupplied stack values. This needs to be done whenever there
210 ;;; are stack values.
211 ;;; -- Reset SP. This must be done whenever other than 1 value is returned,
212 ;;; regardless of the number of values desired.
214 ;;; The general-case code looks like this:
216 b regs-defaulted
; Skip if MVs
219 move a1 null-tn
; Default register values
221 loadi nargs
1 ; Force defaulting of stack values
222 move ocfp csp
; Set up args for SP resetting
225 subu temp nargs register-arg-count
227 bltz temp default-value-7
; jump to default code
229 loadw move-temp ocfp-tn
6 ; Move value to correct location.
230 store-stack-tn val4-tn move-temp
232 bltz temp default-value-8
234 loadw move-temp ocfp-tn
7
235 store-stack-tn val5-tn move-temp
240 move sp ocfp
; Reset SP.
245 store-stack-tn val4-tn null-tn
; Nil out 7'th value. (first on stack)
248 store-stack-tn val5-tn null-tn
; Nil out 8'th value.
255 (defun default-unknown-values (vop values nvals move-temp temp lra-label
)
256 (declare (type (or tn-ref null
) values
)
257 (type unsigned-byte nvals
) (type tn move-temp temp
))
260 ;; Note that this is a single-value return point. This is
261 ;; actually the multiple-value entry point for a single
262 ;; desired value, but the code location has to be here, or the
263 ;; debugger backtrace gets confused.
264 (without-scheduling ()
265 (note-this-location vop
:single-value-return
)
266 (move ocfp-tn csp-tn
)
269 (inst compute-code-from-lra code-tn code-tn lra-label temp
)))
270 (let ((regs-defaulted (gen-label))
271 (defaulting-done (gen-label))
272 (default-stack-vals (gen-label)))
273 (without-scheduling ()
274 ;; Note that this is an unknown-values return point.
275 (note-this-location vop
:unknown-return
)
276 ;; If there are no stack results, clear the stack now.
277 (if (> nvals register-arg-count
)
278 (inst subq nargs-tn
(fixnumize register-arg-count
) temp
)
279 (move ocfp-tn csp-tn
))
280 ;; Branch off to the MV case.
281 (inst br zero-tn regs-defaulted
))
283 ;; Do the single value case.
285 (val (tn-ref-across values
) (tn-ref-across val
)))
286 ((= i
(min nvals register-arg-count
)))
287 (move null-tn
(tn-ref-tn val
)))
288 (when (> nvals register-arg-count
)
289 (move csp-tn ocfp-tn
)
290 (inst br zero-tn default-stack-vals
))
292 (emit-label regs-defaulted
)
294 (when (> nvals register-arg-count
)
295 ;; If there are stack results, we have to default them
296 ;; and clear the stack.
297 (collect ((defaults))
298 (do ((i register-arg-count
(1+ i
))
299 (val (do ((i 0 (1+ i
))
300 (val values
(tn-ref-across val
)))
301 ((= i register-arg-count
) val
))
302 (tn-ref-across val
)))
305 (let ((default-lab (gen-label))
306 (tn (tn-ref-tn val
)))
307 (defaults (cons default-lab tn
))
309 (inst ble temp default-lab
)
310 (inst ldl move-temp
(* i n-word-bytes
) ocfp-tn
)
311 (inst subq temp
(fixnumize 1) temp
)
312 (store-stack-tn tn move-temp
)))
314 (emit-label defaulting-done
)
315 (move ocfp-tn csp-tn
)
317 (let ((defaults (defaults)))
319 (assemble (*elsewhere
*)
320 (emit-label default-stack-vals
)
321 (do ((remaining defaults
(cdr remaining
)))
323 (let ((def (car remaining
)))
324 (emit-label (car def
))
325 (store-stack-tn (cdr def
) null-tn
)))
326 (inst br zero-tn defaulting-done
)))))
329 (inst compute-code-from-lra code-tn code-tn lra-label temp
))))
332 ;;;; unknown values receiving
334 ;;; Emit code needed at the return point for an unknown-values call
335 ;;; for an arbitrary number of values.
337 ;;; We do the single and non-single cases with no shared code: there
338 ;;; doesn't seem to be any potential overlap, and receiving a single
339 ;;; value is more important efficiency-wise.
341 ;;; When there is a single value, we just push it on the stack,
342 ;;; returning the old SP and 1.
344 ;;; When there is a variable number of values, we move all of the
345 ;;; argument registers onto the stack, and return Args and Nargs.
347 ;;; Args and Nargs are TNs wired to the named locations. We must
348 ;;; explicitly allocate these TNs, since their lifetimes overlap with
349 ;;; the results Start and Count (also, it's nice to be able to target
351 (defun receive-unknown-values (args nargs start count lra-label temp
)
352 (declare (type tn args nargs start count temp
))
353 (let ((variable-values (gen-label))
355 (without-scheduling ()
356 (inst br zero-tn variable-values
)
360 (inst compute-code-from-lra code-tn code-tn lra-label temp
))
361 (inst addq csp-tn
4 csp-tn
)
362 (storew (first *register-arg-tns
*) csp-tn -
1)
363 (inst subq csp-tn
4 start
)
364 (inst li
(fixnumize 1) count
)
368 (assemble (*elsewhere
*)
369 (emit-label variable-values
)
371 (inst compute-code-from-lra code-tn code-tn lra-label temp
))
372 (do ((arg *register-arg-tns
* (rest arg
))
375 (storew (first arg
) args i
))
378 (inst br zero-tn done
)))
381 ;;; a VOP that can be inherited by unknown values receivers. The main
382 ;;; thing this handles is allocation of the result temporaries.
383 (define-vop (unknown-values-receiver)
385 (start :scs
(any-reg))
386 (count :scs
(any-reg)))
387 (:temporary
(:sc descriptor-reg
:offset ocfp-offset
388 :from
:eval
:to
(:result
0))
390 (:temporary
(:sc any-reg
:offset nargs-offset
391 :from
:eval
:to
(:result
1))
393 (:temporary
(:scs
(non-descriptor-reg)) temp
))
395 ;;;; local call with unknown values convention return
397 ;;; Non-TR local call for a fixed number of values passed according to the
398 ;;; unknown values convention.
400 ;;; Args are the argument passing locations, which are specified only to
401 ;;; terminate their lifetimes in the caller.
403 ;;; Values are the return value locations (wired to the standard passing
406 ;;; Save is the save info, which we can ignore since saving has been
407 ;;; done. Return-PC is the TN that the return PC should be passed in.
408 ;;; Target is a continuation pointing to the start of the called
409 ;;; function. Nvals is the number of values received.
411 ;;; Note: we can't use normal load-tn allocation for the fixed args,
412 ;;; since all registers may be tied up by the more operand. Instead,
413 ;;; we use MAYBE-LOAD-STACK-TN.
414 (define-vop (call-local)
418 (:results
(values :more t
))
420 (:move-args
:local-call
)
421 (:info arg-locs callee target nvals
)
423 (:temporary
(:scs
(descriptor-reg) :from
:eval
) move-temp
)
424 (:temporary
(:scs
(non-descriptor-reg)) temp
)
425 (:temporary
(:sc control-stack
:offset nfp-save-offset
) nfp-save
)
426 (:temporary
(:sc any-reg
:offset ocfp-offset
:from
:eval
) ocfp
)
427 (:ignore arg-locs args ocfp
)
429 (let ((label (gen-label))
430 (cur-nfp (current-nfp-tn vop
)))
432 (store-stack-tn nfp-save cur-nfp
))
433 (let ((callee-nfp (callee-nfp-tn callee
)))
434 (maybe-load-stack-nfp-tn callee-nfp nfp temp
))
435 (maybe-load-stack-tn cfp-tn fp
)
436 (trace-table-entry trace-table-call-site
)
437 (inst compute-lra-from-code
438 (callee-return-pc-tn callee
) code-tn label temp
)
439 (note-this-location vop
:call-site
)
440 (inst br zero-tn target
)
441 (trace-table-entry trace-table-normal
)
442 (emit-return-pc label
)
443 (default-unknown-values vop values nvals move-temp temp label
)
444 (maybe-load-stack-nfp-tn cur-nfp nfp-save temp
))))
447 ;;; Non-TR local call for a variable number of return values passed
448 ;;; according to the unknown values convention. The results are the
449 ;;; start of the values glob and the number of values received.
451 ;;; Note: we can't use normal load-tn allocation for the fixed args,
452 ;;; since all registers may be tied up by the more operand. Instead,
453 ;;; we use MAYBE-LOAD-STACK-TN.
454 (define-vop (multiple-call-local unknown-values-receiver
)
459 (:move-args
:local-call
)
460 (:info save callee target
)
463 (:temporary
(:sc control-stack
:offset nfp-save-offset
) nfp-save
)
464 (:temporary
(:scs
(non-descriptor-reg)) temp
)
466 (let ((label (gen-label))
467 (cur-nfp (current-nfp-tn vop
)))
469 (store-stack-tn nfp-save cur-nfp
))
470 (let ((callee-nfp (callee-nfp-tn callee
)))
471 (maybe-load-stack-nfp-tn callee-nfp nfp temp
))
472 (maybe-load-stack-tn cfp-tn fp
)
473 (trace-table-entry trace-table-call-site
)
474 (inst compute-lra-from-code
475 (callee-return-pc-tn callee
) code-tn label temp
)
476 (note-this-location vop
:call-site
)
477 (inst bsr zero-tn target
)
478 (trace-table-entry trace-table-normal
)
479 (emit-return-pc label
)
480 (note-this-location vop
:unknown-return
)
481 (receive-unknown-values values-start nvals start count label temp
)
482 (maybe-load-stack-nfp-tn cur-nfp nfp-save temp
))))
485 ;;;; local call with known values return
487 ;;; Non-TR local call with known return locations. Known-value return
488 ;;; works just like argument passing in local call.
490 ;;; Note: we can't use normal load-tn allocation for the fixed args, since all
491 ;;; registers may be tied up by the more operand. Instead, we use
492 ;;; MAYBE-LOAD-STACK-TN.
493 (define-vop (known-call-local)
497 (:results
(res :more t
))
498 (:move-args
:local-call
)
500 (:info save callee target
)
501 (:ignore args res save
)
503 (:temporary
(:sc control-stack
:offset nfp-save-offset
) nfp-save
)
504 (:temporary
(:scs
(non-descriptor-reg)) temp
)
506 (let ((label (gen-label))
507 (cur-nfp (current-nfp-tn vop
)))
509 (store-stack-tn nfp-save cur-nfp
))
510 (let ((callee-nfp (callee-nfp-tn callee
)))
511 (maybe-load-stack-nfp-tn callee-nfp nfp temp
))
512 (maybe-load-stack-tn cfp-tn fp
)
513 (trace-table-entry trace-table-call-site
)
514 (inst compute-lra-from-code
515 (callee-return-pc-tn callee
) code-tn label temp
)
516 (note-this-location vop
:call-site
)
517 (inst bsr zero-tn target
)
518 (trace-table-entry trace-table-normal
)
519 (emit-return-pc label
)
520 (note-this-location vop
:known-return
)
521 (maybe-load-stack-nfp-tn cur-nfp nfp-save temp
))))
523 ;;; Return from known values call. We receive the return locations as
524 ;;; arguments to terminate their lifetimes in the returning function.
525 ;;; We restore FP and CSP and jump to the Return-PC.
527 ;;; Note: we can't use normal load-tn allocation for the fixed args,
528 ;;; since all registers may be tied up by the more operand. Instead,
529 ;;; we use MAYBE-LOAD-STACK-TN.
530 (define-vop (known-return)
531 (:args
(ocfp :target ocfp-temp
)
532 (return-pc :target return-pc-temp
)
534 (:temporary
(:sc any-reg
:from
(:argument
0)) ocfp-temp
)
535 (:temporary
(:sc any-reg
:from
(:argument
1))
537 (:temporary
(:scs
(interior-reg)) lip
)
538 (:move-args
:known-return
)
540 (:ignore val-locs vals
)
543 (trace-table-entry trace-table-fun-epilogue
)
544 (maybe-load-stack-tn ocfp-temp ocfp
)
545 (maybe-load-stack-tn return-pc-temp return-pc
)
547 (let ((cur-nfp (current-nfp-tn vop
)))
549 (inst addq cur-nfp
(bytes-needed-for-non-descriptor-stack-frame)
551 (inst subq return-pc-temp
(- other-pointer-lowtag n-word-bytes
) lip
)
552 (move ocfp-temp cfp-tn
)
553 (inst ret zero-tn lip
1)
554 (trace-table-entry trace-table-normal
)))
558 ;;;; There is something of a cross-product effect with full calls.
559 ;;;; Different versions are used depending on whether we know the
560 ;;;; number of arguments or the name of the called function, and
561 ;;;; whether we want fixed values, unknown values, or a tail call.
563 ;;;; In full call, the arguments are passed creating a partial frame on
564 ;;;; the stack top and storing stack arguments into that frame. On
565 ;;;; entry to the callee, this partial frame is pointed to by FP. If
566 ;;;; there are no stack arguments, we don't bother allocating a partial
567 ;;;; frame, and instead set FP to SP just before the call.
569 ;;; This macro helps in the definition of full call VOPs by avoiding
570 ;;; code replication in defining the cross-product VOPs.
572 ;;; Name is the name of the VOP to define.
574 ;;; Named is true if the first argument is a symbol whose global
575 ;;; function definition is to be called.
577 ;;; Return is either :FIXED, :UNKNOWN or :TAIL:
578 ;;; -- If :FIXED, then the call is for a fixed number of values, returned
579 ;;; in the standard passing locations (passed as result operands).
580 ;;; -- If :UNKNOWN, then the result values are pushed on the stack, and
581 ;;; the result values are specified by the Start and Count as in the
582 ;;; unknown-values continuation representation.
583 ;;; -- If :TAIL, then do a tail-recursive call. No values are returned.
584 ;;; The Ocfp and Return-PC are passed as the second and third arguments.
586 ;;; In non-tail calls, the pointer to the stack arguments is passed as
587 ;;; the last fixed argument. If Variable is false, then the passing
588 ;;; locations are passed as a more arg. Variable is true if there are
589 ;;; a variable number of arguments passed on the stack. Variable
590 ;;; cannot be specified with :TAIL return. TR variable argument call
591 ;;; is implemented separately.
593 ;;; In tail call with fixed arguments, the passing locations are
594 ;;; passed as a more arg, but there is no new-FP, since the arguments
595 ;;; have been set up in the current frame.
596 (defmacro define-full-call
(name named return variable
)
597 (aver (not (and variable
(eq return
:tail
))))
599 ,@(when (eq return
:unknown
)
600 '(unknown-values-receiver)))
602 ,@(unless (eq return
:tail
)
603 '((new-fp :scs
(any-reg) :to
:eval
)))
606 '(name :target name-pass
)
607 '(arg-fun :target lexenv
))
609 ,@(when (eq return
:tail
)
610 '((ocfp :target ocfp-pass
)
611 (return-pc :target return-pc-pass
)))
613 ,@(unless variable
'((args :more t
:scs
(descriptor-reg)))))
615 ,@(when (eq return
:fixed
)
616 '((:results
(values :more t
))))
618 (:save-p
,(if (eq return
:tail
) :compute-only t
))
620 ,@(unless (or (eq return
:tail
) variable
)
621 '((:move-args
:full-call
)))
624 (:info
,@(unless (or variable
(eq return
:tail
)) '(arg-locs))
625 ,@(unless variable
'(nargs))
626 ,@(when (eq return
:fixed
) '(nvals))
629 (:ignore
#!+gengc
,@(unless (eq return
:tail
) '(return-pc-pass))
630 ,@(unless (or variable
(eq return
:tail
)) '(arg-locs))
631 ,@(unless variable
'(args))
632 ;; Step instrumentation for full calls not implemented yet.
633 ;; See the PPC backend for an example.
636 (:temporary
(:sc descriptor-reg
639 ,@(unless (eq return
:fixed
)
643 (:temporary
(:sc descriptor-reg
644 :offset
#!-gengc lra-offset
#!+gengc ra-offset
645 :from
(:argument
,(if (eq return
:tail
) 2 1))
650 `((:temporary
(:sc descriptor-reg
:offset fdefn-offset
651 :from
(:argument
,(if (eq return
:tail
) 0 1))
655 `((:temporary
(:sc descriptor-reg
:offset lexenv-offset
656 :from
(:argument
,(if (eq return
:tail
) 0 1))
660 (:temporary
(:scs
(descriptor-reg) :from
(:argument
0) :to
:eval
)
663 (:temporary
(:sc any-reg
:offset nargs-offset
:to
:eval
)
667 (mapcar (lambda (name offset
)
668 `(:temporary
(:sc descriptor-reg
672 register-arg-names
*register-arg-offsets
*))
673 ,@(when (eq return
:fixed
)
674 '((:temporary
(:scs
(descriptor-reg) :from
:eval
) move-temp
)))
676 ,@(unless (eq return
:tail
)
677 '((:temporary
(:scs
(non-descriptor-reg)) temp
)
678 (:temporary
(:sc control-stack
:offset nfp-save-offset
) nfp-save
)))
680 (:temporary
(:sc interior-reg
:offset lip-offset
) entry-point
)
682 (:generator
,(+ (if named
5 0)
684 (if (eq return
:tail
) 0 10)
686 (if (eq return
:unknown
) 25 0))
687 (let* ((cur-nfp (current-nfp-tn vop
))
688 ,@(unless (eq return
:tail
)
689 '((lra-label (gen-label))))
693 ,@(if (eq return
:tail
)
694 '((unless (location= ocfp ocfp-pass
)
696 (unless (location= return-pc
707 (flet ((do-next-filler ()
708 (let* ((next (pop filler
))
709 (what (if (consp next
) (car next
) next
)))
713 `((inst subq csp-tn new-fp nargs-pass
)
715 (mapcar (lambda (name)
720 register-arg-names
)))
721 '((inst li
(fixnumize nargs
) nargs-pass
))))
722 ,@(if (eq return
:tail
)
726 (inst move ocfp ocfp-pass
))
729 (ash (tn-offset ocfp
)
734 (#!-gengc descriptor-reg
#!+gengc any-reg
735 (inst move return-pc return-pc-pass
))
737 (inst ldl return-pc-pass
738 (ash (tn-offset return-pc
)
743 (bytes-needed-for-non-descriptor-stack-frame)
747 (inst compute-lra-from-code
748 return-pc-pass code-tn lra-label temp
))
750 (store-stack-tn nfp-save cur-nfp
))
752 (inst move cfp-tn ocfp-pass
))
755 '(move new-fp cfp-tn
)
756 '(if (> nargs register-arg-count
)
758 (move csp-tn cfp-tn
)))
759 (trace-table-entry trace-table-call-site
))))
764 (descriptor-reg (move name name-pass
))
767 (ash (tn-offset name
) word-shift
) cfp-tn
)
771 (- (ash (tn-offset name
) word-shift
)
772 other-pointer-lowtag
) code-tn
)
774 (inst ldl entry-point
775 (- (ash fdefn-raw-addr-slot word-shift
)
776 other-pointer-lowtag
) name-pass
)
779 (descriptor-reg (move arg-fun lexenv
))
782 (ash (tn-offset arg-fun
) word-shift
) cfp-tn
)
786 (- (ash (tn-offset arg-fun
) word-shift
)
787 other-pointer-lowtag
) code-tn
)
791 (- (ash closure-fun-slot word-shift
)
792 fun-pointer-lowtag
) lexenv
)
797 (- (ash simple-fun-code-offset word-shift
)
798 fun-pointer-lowtag
) entry-point
)
800 (inst ldl entry-point
801 (- (ash closure-entry-point-slot word-shift
)
802 fun-pointer-lowtag
) lexenv
)
810 (note-this-location vop
:call-site
)
812 (inst jsr zero-tn entry-point
))
816 '((trace-table-entry trace-table-normal
)
817 (emit-return-pc lra-label
)
818 (default-unknown-values vop values nvals
819 move-temp temp lra-label
)
820 (maybe-load-stack-nfp-tn cur-nfp nfp-save temp
)))
822 '((trace-table-entry trace-table-normal
)
823 (emit-return-pc lra-label
)
824 (note-this-location vop
:unknown-return
)
825 (receive-unknown-values values-start nvals start count
827 (maybe-load-stack-nfp-tn cur-nfp nfp-save temp
)))
830 (define-full-call call nil
:fixed nil
)
831 (define-full-call call-named t
:fixed nil
)
832 (define-full-call multiple-call nil
:unknown nil
)
833 (define-full-call multiple-call-named t
:unknown nil
)
834 (define-full-call tail-call nil
:tail nil
)
835 (define-full-call tail-call-named t
:tail nil
)
837 (define-full-call call-variable nil
:fixed t
)
838 (define-full-call multiple-call-variable nil
:unknown t
)
840 ;;; This is defined separately, since it needs special code that blits
841 ;;; the arguments down.
842 (define-vop (tail-call-variable)
844 (args-arg :scs
(any-reg) :target args
)
845 (function-arg :scs
(descriptor-reg) :target lexenv
)
846 (ocfp-arg :scs
(any-reg) :target ocfp
)
847 (lra-arg :scs
(#!-gengc descriptor-reg
#!+gengc any-reg
) :target lra
))
849 (:temporary
(:sc any-reg
:offset nl0-offset
:from
(:argument
0)) args
)
850 (:temporary
(:sc any-reg
:offset lexenv-offset
:from
(:argument
1)) lexenv
)
851 (:temporary
(:sc any-reg
:offset ocfp-offset
:from
(:argument
2)) ocfp
)
852 (:temporary
(:sc any-reg
:offset
#!-gengc lra-offset
#!+gengc ra-offset
853 :from
(:argument
3)) lra
)
854 (:temporary
(:scs
(non-descriptor-reg)) temp
)
860 ;; Move these into the passing locations if they are not already there.
862 (move function-arg lexenv
)
866 ;; Clear the number stack if anything is there.
867 (let ((cur-nfp (current-nfp-tn vop
)))
869 (inst addq cur-nfp
(bytes-needed-for-non-descriptor-stack-frame)
872 ;; And jump to the assembly-routine that does the bliting.
873 (inst li
(make-fixup 'tail-call-variable
:assembly-routine
) temp
)
874 (inst jmp zero-tn temp
)))
876 ;;;; unknown values return
878 ;;; Return a single value using the unknown-values convention.
879 (define-vop (return-single)
880 (:args
(ocfp :scs
(any-reg))
881 #!-gengc
(return-pc :scs
(descriptor-reg))
882 #!+gengc
(return-pc :scs
(any-reg) :target ra
)
885 #!-gengc
(:temporary
(:scs
(interior-reg)) lip
)
886 #!+gengc
(:temporary
(:sc any-reg
:offset ra-offset
:from
(:argument
1)) ra
)
887 #!+gengc
(:temporary
(:scs
(any-reg) :from
(:argument
1)) temp
)
890 ;; Clear the number stack.
891 (trace-table-entry trace-table-fun-epilogue
)
892 (let ((cur-nfp (current-nfp-tn vop
)))
894 (inst addq cur-nfp
(bytes-needed-for-non-descriptor-stack-frame)
896 ;; Clear the control stack, and restore the frame pointer.
900 #!-gengc
(lisp-return return-pc lip
:offset
2)
903 (inst addq return-pc
(* 2 n-word-bytes
) temp
)
904 (unless (location= ra return-pc
)
905 (inst move ra return-pc
))
906 (inst ret zero-tn temp
1))
907 (trace-table-entry trace-table-normal
)))
909 ;;; Do unknown-values return of a fixed number of values. The Values
910 ;;; are required to be set up in the standard passing locations. Nvals
911 ;;; is the number of values returned.
913 ;;; If returning a single value, then deallocate the current frame,
914 ;;; restore FP and jump to the single-value entry at Return-PC + 8.
916 ;;; If returning other than one value, then load the number of values
917 ;;; returned, NIL out unsupplied values registers, restore FP and
918 ;;; return at Return-PC. When there are stack values, we must
919 ;;; initialize the argument pointer to point to the beginning of the
920 ;;; values block (which is the beginning of the current frame.)
922 (:args
(ocfp :scs
(any-reg))
923 (return-pc :scs
(#!-gengc descriptor-reg
#!+gengc any-reg
)
925 #!+gengc
:target
#!+gengc ra
)
929 (:temporary
(:sc descriptor-reg
:offset a0-offset
:from
(:eval
0)) a0
)
930 (:temporary
(:sc descriptor-reg
:offset a1-offset
:from
(:eval
0)) a1
)
931 (:temporary
(:sc descriptor-reg
:offset a2-offset
:from
(:eval
0)) a2
)
932 (:temporary
(:sc descriptor-reg
:offset a3-offset
:from
(:eval
0)) a3
)
933 (:temporary
(:sc descriptor-reg
:offset a4-offset
:from
(:eval
0)) a4
)
934 (:temporary
(:sc descriptor-reg
:offset a5-offset
:from
(:eval
0)) a5
)
935 (:temporary
(:sc any-reg
:offset nargs-offset
) nargs
)
936 (:temporary
(:sc any-reg
:offset ocfp-offset
) val-ptr
)
937 #!-gengc
(:temporary
(:scs
(interior-reg)) lip
)
938 #!+gengc
(:temporary
(:sc any-reg
:offset ra-offset
:from
(:eval
1)) ra
)
941 ;; Clear the number stack.
942 (trace-table-entry trace-table-fun-epilogue
)
943 (let ((cur-nfp (current-nfp-tn vop
)))
945 (inst addq cur-nfp
(bytes-needed-for-non-descriptor-stack-frame)
947 ;; Establish the values pointer and values count.
948 (move cfp-tn val-ptr
)
949 (inst li
(fixnumize nvals
) nargs
)
950 ;; restore the frame pointer and clear as much of the control
951 ;; stack as possible.
953 ;; ADDQ only accepts immediates of type (UNSIGNED-BYTE 8). Here,
954 ;; instead of adding (* NVALS N-WORD-BYTES), we use NARGS that
955 ;; we've carefully set up, but protect ourselves by averring that
956 ;; FIXNUMIZEation and multiplication by N-WORD-BYTES is the same.
957 (aver (= (* nvals n-word-bytes
) (fixnumize nvals
)))
958 (inst addq val-ptr nargs csp-tn
)
959 ;; pre-default any argument register that need it.
960 (when (< nvals register-arg-count
)
961 (dolist (reg (subseq (list a0 a1 a2 a3 a4 a5
) nvals
))
964 (lisp-return return-pc lip
)
965 (trace-table-entry trace-table-normal
)))
967 ;;; Do unknown-values return of an arbitrary number of values (passed
968 ;;; on the stack.) We check for the common case of a single return
969 ;;; value, and do that inline using the normal single value return
970 ;;; convention. Otherwise, we branch off to code that calls an
971 ;;; assembly-routine.
972 (define-vop (return-multiple)
973 (:args
(ocfp-arg :scs
(any-reg) :target ocfp
)
974 #!-gengc
(lra-arg :scs
(descriptor-reg) :target lra
)
975 #!+gengc
(return-pc :scs
(any-reg) :target ra
)
976 (vals-arg :scs
(any-reg) :target vals
)
977 (nvals-arg :scs
(any-reg) :target nvals
))
979 (:temporary
(:sc any-reg
:offset nl1-offset
:from
(:argument
0)) ocfp
)
981 (:temporary
(:sc descriptor-reg
:offset lra-offset
:from
(:argument
1)) lra
)
983 (:temporary
(:sc any-reg
:offset ra-offset
:from
(:argument
1)) ra
)
984 (:temporary
(:sc any-reg
:offset nl0-offset
:from
(:argument
2)) vals
)
985 (:temporary
(:sc any-reg
:offset nargs-offset
:from
(:argument
3)) nvals
)
986 (:temporary
(:sc descriptor-reg
:offset a0-offset
) a0
)
987 (:temporary
(:scs
(non-descriptor-reg)) temp
)
988 #!-gengc
(:temporary
(:scs
(interior-reg)) lip
)
989 #!+gengc
(:temporary
(:scs
(any-reg) :from
(:argument
0)) temp
)
994 (trace-table-entry trace-table-fun-epilogue
)
995 (let ((not-single (gen-label)))
996 ;; Clear the number stack.
997 (let ((cur-nfp (current-nfp-tn vop
)))
999 (inst addq cur-nfp
(bytes-needed-for-non-descriptor-stack-frame)
1002 ;; Check for the single case.
1003 (inst li
(fixnumize 1) a0
)
1004 (inst cmpeq nvals-arg a0 temp
)
1005 (inst ldl a0
0 vals-arg
)
1006 (inst beq temp not-single
)
1008 ;; Return with one value.
1009 (move cfp-tn csp-tn
)
1010 (move ocfp-arg cfp-tn
)
1011 (lisp-return lra-arg lip
:offset
2)
1013 ;; Nope, not the single case.
1014 (emit-label not-single
)
1015 (move ocfp-arg ocfp
)
1017 (move vals-arg vals
)
1018 (move nvals-arg nvals
)
1019 (inst li
(make-fixup 'return-multiple
:assembly-routine
) temp
)
1020 (inst jmp zero-tn temp
))
1021 (trace-table-entry trace-table-normal
)))
1025 ;;; We don't need to do anything special for regular functions.
1026 (define-vop (setup-environment)
1030 ;; Don't bother doing anything.
1033 ;;; Get the lexical environment from its passing location.
1034 (define-vop (setup-closure-environment)
1035 (:temporary
(:sc descriptor-reg
:offset lexenv-offset
:target closure
1038 (:results
(closure :scs
(descriptor-reg)))
1043 (move lexenv closure
)))
1045 ;;; Copy a &MORE arg from the argument area to the end of the current
1046 ;;; frame. FIXED is the number of non-&MORE arguments.
1047 (define-vop (copy-more-arg)
1048 (:temporary
(:sc any-reg
:offset nl0-offset
) result
)
1049 (:temporary
(:sc any-reg
:offset nl1-offset
) count
)
1050 (:temporary
(:sc any-reg
:offset nl2-offset
) src
)
1051 (:temporary
(:sc any-reg
:offset nl4-offset
) dst
)
1052 (:temporary
(:sc descriptor-reg
:offset l0-offset
) temp
)
1055 (let ((loop (gen-label))
1056 (do-regs (gen-label))
1058 (when (< fixed register-arg-count
)
1059 ;; Save a pointer to the results so we can fill in register
1060 ;; args. We don't need this if there are more fixed args than
1062 (move csp-tn result
))
1063 ;; Allocate the space on the stack.
1064 (cond ((zerop fixed
)
1065 (inst addq csp-tn nargs-tn csp-tn
)
1066 (inst beq nargs-tn done
))
1068 (inst subq nargs-tn
(fixnumize fixed
) count
)
1069 (inst ble count done
)
1070 (inst addq csp-tn count csp-tn
)))
1071 (when (< fixed register-arg-count
)
1072 ;; We must stop when we run out of stack args, not when we run
1073 ;; out of &MORE args.
1074 (inst subq nargs-tn
(fixnumize register-arg-count
) count
))
1075 ;; Initialize dst to be end of stack.
1077 ;; Everything of interest in registers.
1078 (inst ble count do-regs
)
1079 ;; Initialize SRC to be end of args.
1080 (inst addq cfp-tn nargs-tn src
)
1083 ;; *--dst = *--src, --count
1084 (inst subq src n-word-bytes src
)
1085 (inst subq count
(fixnumize 1) count
)
1087 (inst subq dst n-word-bytes dst
)
1089 (inst bgt count loop
)
1091 (emit-label do-regs
)
1092 (when (< fixed register-arg-count
)
1093 ;; Now we have to deposit any more args that showed up in
1094 ;; registers. We know there is at least one &MORE arg,
1095 ;; otherwise we would have branched to DONE up at the top.
1096 (inst subq nargs-tn
(fixnumize (1+ fixed
)) count
)
1097 (do ((i fixed
(1+ i
)))
1098 ((>= i register-arg-count
))
1099 ;; Store it relative to the pointer saved at the start.
1100 (storew (nth i
*register-arg-tns
*) result
(- i fixed
))
1101 ;; Is this the last one?
1102 (inst beq count done
)
1104 (inst subq count
(fixnumize 1) count
)))
1105 (emit-label done
))))
1107 ;;; &MORE args are stored consecutively on the stack, starting
1108 ;;; immediately at the context pointer. The context pointer is not
1109 ;;; typed, so the lowtag is 0.
1110 (define-full-reffer more-arg
* 0 0 (descriptor-reg any-reg
) * %more-arg
)
1112 ;;; Turn &MORE arg (context, count) into a list.
1113 (define-vop (listify-rest-args)
1114 (:args
(context-arg :target context
:scs
(descriptor-reg))
1115 (count-arg :target count
:scs
(any-reg)))
1116 (:arg-types
* tagged-num
)
1117 (:temporary
(:scs
(any-reg) :from
(:argument
0)) context
)
1118 (:temporary
(:scs
(any-reg) :from
(:argument
1)) count
)
1119 (:temporary
(:scs
(descriptor-reg) :from
:eval
) temp dst
)
1120 (:results
(result :scs
(descriptor-reg)))
1121 (:translate %listify-rest-args
)
1125 (let* ((enter (gen-label))
1128 (dx-p (node-stack-allocate-p node
))
1129 (alloc-area-tn (if dx-p csp-tn alloc-tn
)))
1130 (move context-arg context
)
1131 (move count-arg count
)
1132 ;; Check to see if there are any arguments.
1133 (move null-tn result
)
1134 (inst beq count done
)
1136 ;; We need to do this atomically.
1139 (when dx-p
(align-csp temp
))
1140 ;; Allocate a cons (2 words) for each item.
1141 (inst bis alloc-area-tn list-pointer-lowtag result
)
1143 (inst sll count
1 temp
)
1144 (inst addq alloc-area-tn temp alloc-area-tn
)
1145 (inst br zero-tn enter
)
1147 ;; Store the current cons in the cdr of the previous cons.
1149 (inst addq dst
(* 2 n-word-bytes
) dst
)
1150 (storew dst dst -
1 list-pointer-lowtag
)
1154 (loadw temp context
)
1155 (inst addq context n-word-bytes context
)
1157 ;; Store the value in the car (in delay slot)
1158 (storew temp dst
0 list-pointer-lowtag
)
1160 ;; Decrement count, and if != zero, go back for more.
1161 (inst subq count
(fixnumize 1) count
)
1162 (inst bne count loop
)
1164 ;; NIL out the last cons.
1165 (storew null-tn dst
1 list-pointer-lowtag
))
1166 (emit-label done
))))
1168 ;;; Return the location and size of the &MORE arg glob created by
1169 ;;; COPY-MORE-ARG. Supplied is the total number of arguments supplied
1170 ;;; (originally passed in NARGS.) Fixed is the number of non-&rest
1173 ;;; We must duplicate some of the work done by COPY-MORE-ARG, since at
1174 ;;; that time the environment is in a pretty brain-damaged state,
1175 ;;; preventing this info from being returned as values. What we do is
1176 ;;; compute supplied - fixed, and return a pointer that many words
1177 ;;; below the current stack top.
1178 (define-vop (more-arg-context)
1179 (:policy
:fast-safe
)
1180 (:translate sb
!c
::%more-arg-context
)
1181 (:args
(supplied :scs
(any-reg)))
1182 (:arg-types tagged-num
(:constant fixnum
))
1184 (:results
(context :scs
(descriptor-reg))
1185 (count :scs
(any-reg)))
1186 (:result-types t tagged-num
)
1187 (:note
"more-arg-context")
1189 (inst subq supplied
(fixnumize fixed
) count
)
1190 (inst subq csp-tn count context
)))
1192 ;;; Signal wrong argument count error if NARGS isn't equal to COUNT.
1193 (define-vop (verify-arg-count)
1194 (:policy
:fast-safe
)
1195 (:translate sb
!c
::%verify-arg-count
)
1196 (:args
(nargs :scs
(any-reg)))
1197 (:arg-types positive-fixnum
(:constant t
))
1198 (:temporary
(:scs
(any-reg) :type fixnum
) temp
)
1201 (:save-p
:compute-only
)
1204 (generate-error-code vop invalid-arg-count-error nargs
)))
1205 (cond ((zerop count
)
1206 (inst bne nargs err-lab
))
1208 (inst subq nargs
(fixnumize count
) temp
)
1209 (inst bne temp err-lab
))))))
1211 ;;; various other error signalers
1212 (macrolet ((frob (name error translate
&rest args
)
1213 `(define-vop (,name
)
1215 `((:policy
:fast-safe
)
1216 (:translate
,translate
)))
1217 (:args
,@(mapcar (lambda (arg)
1218 `(,arg
:scs
(any-reg descriptor-reg
)))
1221 (:save-p
:compute-only
)
1223 (error-call vop
,error
,@args
)))))
1224 (frob arg-count-error invalid-arg-count-error
1225 sb
!c
::%arg-count-error nargs
)
1226 (frob type-check-error object-not-type-error sb
!c
::%type-check-error
1228 (frob layout-invalid-error layout-invalid-error sb
!c
::%layout-invalid-error
1230 (frob odd-key-args-error odd-key-args-error
1231 sb
!c
::%odd-key-args-error
)
1232 (frob unknown-key-arg-error unknown-key-arg-error
1233 sb
!c
::%unknown-key-arg-error key
)
1234 (frob nil-fun-returned-error nil-fun-returned-error nil fun
))
1238 (define-vop (step-instrument-before-vop)
1239 (:policy
:fast-safe
)
1242 ;; Stub! See the PPC backend for an example.
1243 (note-this-location vop
:step-before-vop
)))