1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
|
{
Copyright (c) 2002 by Florian Klaempfl
PowerPC64 specific calling conventions
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit cpupara;
{$I fpcdefs.inc}
interface
uses
globtype,
aasmtai,aasmdata,
cpubase,
symconst, symtype, symdef, symsym,
paramgr, parabase, cgbase, cgutils;
type
tcpuparamanager = class(tparamanager)
function get_volatile_registers_int(calloption: tproccalloption):
tcpuregisterset; override;
function get_volatile_registers_fpu(calloption: tproccalloption):
tcpuregisterset; override;
function push_addr_param(varspez: tvarspez; def: tdef; calloption:
tproccalloption): boolean; override;
function ret_in_param(def: tdef; pd: tabstractprocdef): boolean; override;
procedure getintparaloc(pd : tabstractprocdef; nr: longint; var cgpara: tcgpara); override;
function create_paraloc_info(p: tabstractprocdef; side: tcallercallee): longint; override;
function create_varargs_paraloc_info(p: tabstractprocdef; varargspara:
tvarargsparalist): longint; override;
function get_funcretloc(p : tabstractprocdef; side: tcallercallee; forcetempdef: tdef): tcgpara;override;
private
procedure init_values(var curintreg, curfloatreg, curmmreg: tsuperregister;
var cur_stack_offset: aword);
function create_paraloc_info_intern(p: tabstractprocdef; side:
tcallercallee; paras: tparalist;
var curintreg, curfloatreg, curmmreg: tsuperregister; var
cur_stack_offset: aword; isVararg : boolean): longint;
function parseparaloc(p: tparavarsym; const s: string): boolean; override;
procedure create_paraloc_for_def(var para: TCGPara; varspez: tvarspez; paradef: tdef; var nextfloatreg, nextintreg: tsuperregister; var stack_offset: aword; const isVararg, forceintmem: boolean; const side: tcallercallee; const p: tabstractprocdef);
end;
implementation
uses
verbose, systems,
defutil,symtable,symcpu,
procinfo, cpupi;
function tcpuparamanager.get_volatile_registers_int(calloption:
tproccalloption): tcpuregisterset;
begin
result := [RS_R0,RS_R3..RS_R12];
if (target_info.system = system_powerpc64_darwin) then
include(result,RS_R2);
end;
function tcpuparamanager.get_volatile_registers_fpu(calloption:
tproccalloption): tcpuregisterset;
begin
result := [RS_F0..RS_F13];
end;
procedure tcpuparamanager.getintparaloc(pd : tabstractprocdef; nr: longint; var cgpara: tcgpara);
var
paraloc: pcgparalocation;
psym: tparavarsym;
pdef: tdef;
begin
psym:=tparavarsym(pd.paras[nr-1]);
pdef:=psym.vardef;
if push_addr_param(psym.varspez,pdef,pd.proccalloption) then
pdef:=getpointerdef(pdef);
cgpara.reset;
cgpara.size := def_cgsize(pdef);
cgpara.intsize := tcgsize2size[cgpara.size];
cgpara.alignment := get_para_align(pd.proccalloption);
cgpara.def:=pdef;
paraloc := cgpara.add_location;
with paraloc^ do begin
size := def_cgsize(pdef);
def := pdef;
if (nr <= 8) then begin
if (nr = 0) then
internalerror(200309271);
loc := LOC_REGISTER;
register := newreg(R_INTREGISTER, RS_R2 + nr, R_SUBWHOLE);
end else begin
loc := LOC_REFERENCE;
paraloc^.reference.index := NR_STACK_POINTER_REG;
reference.offset := sizeof(aint) * (nr - 8);
end;
end;
end;
function getparaloc(p: tdef): tcgloc;
begin
{ Later, the LOC_REFERENCE is in most cases changed into LOC_REGISTER
if push_addr_param for the def is true
}
case p.typ of
orddef:
result := LOC_REGISTER;
floatdef:
result := LOC_FPUREGISTER;
enumdef:
result := LOC_REGISTER;
pointerdef:
result := LOC_REGISTER;
formaldef:
result := LOC_REGISTER;
classrefdef:
result := LOC_REGISTER;
procvardef,
recorddef:
result := LOC_REGISTER;
objectdef:
if is_object(p) then
result := LOC_REFERENCE
else
result := LOC_REGISTER;
stringdef:
if is_shortstring(p) or is_longstring(p) then
result := LOC_REFERENCE
else
result := LOC_REGISTER;
filedef:
result := LOC_REGISTER;
arraydef:
result := LOC_REFERENCE;
setdef:
if is_smallset(p) then
result := LOC_REGISTER
else
result := LOC_REFERENCE;
variantdef:
result := LOC_REFERENCE;
{ avoid problems with errornous definitions }
errordef:
result := LOC_REGISTER;
else
internalerror(2002071001);
end;
end;
function tcpuparamanager.push_addr_param(varspez: tvarspez; def: tdef;
calloption: tproccalloption): boolean;
begin
result := false;
{ var,out,constref always require address }
if varspez in [vs_var, vs_out, vs_constref] then
begin
result := true;
exit;
end;
case def.typ of
variantdef,
formaldef:
result := true;
procvardef,
recorddef:
result :=
(varspez = vs_const) and
(
(
(not (calloption in [pocall_cdecl, pocall_cppdecl]) and
(def.size > 8))
) or
(calloption = pocall_mwpascal)
);
arraydef:
result := (tarraydef(def).highrange >= tarraydef(def).lowrange) or
is_open_array(def) or
is_array_of_const(def) or
is_array_constructor(def);
objectdef:
result := is_object(def);
setdef:
result := not is_smallset(def);
stringdef:
result := tstringdef(def).stringtype in [st_shortstring, st_longstring];
end;
end;
function tcpuparamanager.ret_in_param(def: tdef; pd: tabstractprocdef): boolean;
var
tmpdef: tdef;
begin
if handle_common_ret_in_param(def,pd,result) then
exit;
{ general rule: passed in registers -> returned in registers }
result:=push_addr_param(vs_value,def,pd.proccalloption);
case target_info.abi of
{ elfv2: non-homogeneous aggregate larger than 2 doublewords or a
homogeneous aggregate with more than eight registers are returned by
reference }
abi_powerpc_elfv2:
begin
if not result then
begin
if (def.typ=recorddef) then
begin
if tcpurecorddef(def).has_single_type_elfv2(tmpdef) then
begin
if def.size>8*tmpdef.size then
result:=true
end
else if def.size>2*sizeof(aint) then
result:=true;
end
else if (def.typ=arraydef) then
begin
if tcpuarraydef(def).has_single_type_elfv2(tmpdef) then
begin
if def.size>8*tmpdef.size then
result:=true
end
else if def.size>2*sizeof(aint) then
result:=true;
end;
end;
end;
{ sysv/aix: any non-scalar/non-floating point is returned by reference }
abi_powerpc_sysv,
abi_powerpc_aix:
begin
case def.typ of
procvardef:
result:=def.size>8;
recorddef:
result:=true;
end;
end;
{ Darwin: if completely passed in registers -> returned by registers;
i.e., if part is passed via memory because there are not enough
registers, return via memory }
abi_powerpc_darwin:
begin
case def.typ of
recorddef:
{ todo: fix once the Darwin/ppc64 abi is fully implemented, as it
requires individual fields to be passed in individual registers,
so a record with 9 bytes may need to be passed via memory }
if def.size>8*sizeof(aint) then
result:=true;
end;
end;
end;
end;
procedure tcpuparamanager.init_values(var curintreg, curfloatreg, curmmreg:
tsuperregister; var cur_stack_offset: aword);
begin
{ register parameter save area begins at 48(r2) }
cur_stack_offset := 48;
curintreg := RS_R3;
curfloatreg := RS_F1;
curmmreg := RS_M2;
end;
function tcpuparamanager.get_funcretloc(p : tabstractprocdef; side:
tcallercallee; forcetempdef: tdef): tcgpara;
var
paraloc: pcgparalocation;
retcgsize: tcgsize;
nextfloatreg, nextintreg, nextmmreg: tsuperregister;
stack_offset: aword;
begin
if set_common_funcretloc_info(p,forcetempdef,retcgsize,result) then
exit;
{ on Darwin and with ELFv2, results are returned the same way as they are
passed }
if target_info.abi in [abi_powerpc_elfv2,abi_powerpc_darwin] then
begin
init_values(nextintreg,nextfloatreg,nextmmreg,stack_offset);
create_paraloc_for_def(result,vs_value,result.def,nextfloatreg,nextintreg,stack_offset,false,false,side,p);
end
else
begin
{ for AIX and ELFv1, the situation is simpler: always just one register }
paraloc:=result.add_location;
{ Return in FPU register? }
if result.def.typ=floatdef then
begin
paraloc^.loc:=LOC_FPUREGISTER;
paraloc^.register:=NR_FPU_RESULT_REG;
paraloc^.size:=retcgsize;
paraloc^.def:=result.def;
end
else
{ Return in register }
begin
paraloc^.loc:=LOC_REGISTER;
if side=callerside then
paraloc^.register:=newreg(R_INTREGISTER,RS_FUNCTION_RESULT_REG,cgsize2subreg(R_INTREGISTER,retcgsize))
else
paraloc^.register:=newreg(R_INTREGISTER,RS_FUNCTION_RETURN_REG,cgsize2subreg(R_INTREGISTER,retcgsize));
paraloc^.size:=retcgsize;
paraloc^.def:=result.def;
end;
end;
end;
function tcpuparamanager.create_paraloc_info(p: tabstractprocdef; side:
tcallercallee): longint;
var
cur_stack_offset: aword;
curintreg, curfloatreg, curmmreg : tsuperregister;
begin
init_values(curintreg, curfloatreg, curmmreg, cur_stack_offset);
result := create_paraloc_info_intern(p, side, p.paras, curintreg, curfloatreg,
curmmreg, cur_stack_offset, false);
create_funcretloc_info(p, side);
end;
function tcpuparamanager.create_paraloc_info_intern(p: tabstractprocdef; side:
tcallercallee; paras: tparalist;
var curintreg, curfloatreg, curmmreg: tsuperregister; var cur_stack_offset:
aword; isVararg : boolean): longint;
var
nextintreg, nextfloatreg, nextmmreg : tsuperregister;
i: integer;
hp: tparavarsym;
paraloc: pcgparalocation;
delphi_nestedfp: boolean;
begin
{$IFDEF extdebug}
if po_explicitparaloc in p.procoptions then
internalerror(200411141);
{$ENDIF extdebug}
result := 0;
nextintreg := curintreg;
nextfloatreg := curfloatreg;
nextmmreg := curmmreg;
for i := 0 to paras.count - 1 do begin
hp := tparavarsym(paras[i]);
{ Syscall for Morphos can have already a paraloc set; not supported on ppc64 }
if (vo_has_explicit_paraloc in hp.varoptions) then begin
internalerror(200412153);
end;
{ currently only support C-style array of const }
if (p.proccalloption in [pocall_cdecl, pocall_cppdecl]) and
is_array_of_const(hp.vardef) then begin
paraloc := hp.paraloc[side].add_location;
{ hack: the paraloc must be valid, but is not actually used }
paraloc^.loc := LOC_REGISTER;
paraloc^.register := NR_R0;
paraloc^.size := OS_ADDR;
paraloc^.def := voidpointertype;
break;
end;
delphi_nestedfp:=(vo_is_parentfp in hp.varoptions) and (po_delphi_nested_cc in p.procoptions);
create_paraloc_for_def(hp.paraloc[side], hp.varspez, hp.vardef,
nextfloatreg, nextintreg, cur_stack_offset, isVararg, delphi_nestedfp, side, p);
end;
curintreg := nextintreg;
curfloatreg := nextfloatreg;
curmmreg := nextmmreg;
result := cur_stack_offset;
end;
procedure tcpuparamanager.create_paraloc_for_def(var para: TCGPara; varspez: tvarspez; paradef: tdef; var nextfloatreg, nextintreg: tsuperregister; var stack_offset: aword; const isVararg, forceintmem: boolean; const side: tcallercallee; const p: tabstractprocdef);
var
paracgsize: tcgsize;
loc: tcgloc;
paraloc: pcgparalocation;
{ def to use for all paralocs if <> nil }
alllocdef,
{ def to use for the current paraloc }
locdef,
tmpdef: tdef;
paralen: aint;
parashift: byte;
tailpadding,
firstparaloc,
paraaligned: boolean;
begin
alllocdef:=nil;
locdef:=nil;
parashift := 0;
para.reset;
if push_addr_param(varspez, paradef, p.proccalloption) then begin
paradef := getpointerdef(paradef);
loc := LOC_REGISTER;
paracgsize := OS_ADDR;
paralen := tcgsize2size[OS_ADDR];
end else begin
if not is_special_array(paradef) then
paralen := paradef.size
else
paralen := tcgsize2size[def_cgsize(paradef)];
{ default rules:
* integer parameters sign/zero-extended to 64 bit
* floating point register used -> skip equivalent GP register
* floating point parameters passed as is (32/64 bit)
* floating point parameters to variable arguments -> in int registers
* aggregates passed in consecutive integer registers
* all *aggregate* data in integer registers exactly mirrors the data
in memory -> on big endian it's left aligned (passed in most
significant part of the 64 bit word if it's < 64 bit), on little
endian it's right aligned (least significant part of the 64 bit
word)
special rules:
implemented
|
| * AIX/ELFv1/SysV ppc64 ABI (big endian only):
x a) single precision floats are stored in the second word of a 64 bit
location when passed on the stack
x b) aggregate with 1 floating point element passed like a floating
point parameter of the same size
x c) aggregates smaller than 64 bit are aligned in least significant bits
of a single 64bit location (incl. register) (AIX exception: it puts
them in the most significant bits)
* ELFv2 ppc64 ABI:
x a) so-called "homogeneous" aggregates, i.e. struct, arrays, or unions
that (recursively) contain only elements of the same floating-
point or vector type, are passed as if those elements were passed as
separate arguments. This is done for up to 8 such elements.
x b) other than a), it's the same as the AIX ppc64 ABI
* Darwin ppc64 ABI:
- as in the general case, aggregates in registers mirror their place in
memory, so if e.g. a struct starts with a 32 bit integer, it's
placed in the upper 32 bits of a the corresponding register. A plain
32 bit integer para is however passed in the lower 32 bits, since it
is promoted to a 64 bit int first (see below)
x a) aggregates with sizes 1, 2 and 4 bytes are padded with 0s on the left
(-> aligned in least significant bits of 64 bit word on big endian) to
a multiple of *4 bytes* (when passed by memory, don't occupy 8 bytes)
x b) other aggregates are padded with 0s on the right (-> aligned in most
signifcant bits of 64 bit word of integer register) to a multiple of
*4 bytes*
x c) all floating pointer parameters (not in aggregates) are promoted to
double (doesn't seem to be correct: 8 bytes are reserved in the
stack frame, but the compiler still stores a single in it (in the
lower 4 bytes -- like with SysV a) )
x d) all integer parameters (not in aggregates) are promoted to 64 bit
(x) e) aggregates (incl. arrays) of exactly 16 bytes passed in two integer
registers
f) floats in *structures without unions* are processed per rule c)
(similar for vector fields)
g) other fields in *structures without unions* are processed
recursively according to e) / f) if they are aggragates, and h)
otherwise (i.e, without promotion!)
(x) h) everything else (structures with unions and size<>16, arrays with
size<>16, ...) is passed "normally" in integer registers
}
{ should the tail be shifted into the most significant bits? }
tailpadding:=false;
{ have we ensured that the next parameter location will be aligned to the
next 8 byte boundary? }
paraaligned:=false;
{ ELFv2 a) }
if (target_info.abi=abi_powerpc_elfv2) and
(((paradef.typ=recorddef) and
tcpurecorddef(paradef).has_single_type_elfv2(tmpdef)) or
((paradef.typ=arraydef) and
tcpuarraydef(paradef).has_single_type_elfv2(tmpdef))) and
(tmpdef.typ=floatdef { or vectordef }) and
(paradef.size<=(8*tmpdef.size)) then
begin
alllocdef:=tmpdef;
loc:=getparaloc(alllocdef);
paracgsize:=def_cgsize(paradef);
end
{ AIX/ELFv1 b) }
else if (target_info.abi in [abi_powerpc_aix,abi_powerpc_sysv]) and
(paradef.typ=recorddef) and
tabstractrecordsymtable(tabstractrecorddef(paradef).symtable).has_single_field(tmpdef) and
(tmpdef.typ=floatdef) then
begin
paradef:=tmpdef;
loc:=getparaloc(paradef);
paracgsize:=def_cgsize(paradef)
end
else if (((paradef.typ=arraydef) and not
is_special_array(paradef)) or
(paradef.typ=recorddef)) then
begin
{ should handle Darwin f/g/h) now, but can't model that yet }
{ general rule: aggregate data is aligned in the most significant bits
except for ELFv1 c) and Darwin a) }
if (target_info.endian=endian_big) and
((target_info.abi in [abi_powerpc_aix,abi_powerpc_elfv2]) or
((target_info.abi=abi_powerpc_sysv) and
(paralen>8)) or
((target_info.abi=abi_powerpc_darwin) and
not(paralen in [1,2,4]))) then
tailpadding:=true
{ if we don't add tailpadding on the caller side, the callee will have
to shift the value in the register before it can store it to memory }
else if (target_info.endian=endian_big) and
(paralen in [3,5,6,7]) then
parashift:=(8-paralen)*8;
{ general fallback rule: pass aggregate types in integer registers
without special adjustments (incl. Darwin h) }
loc:=LOC_REGISTER;
paracgsize:=int_cgsize(paralen);
end
else
begin
loc:=getparaloc(paradef);
paracgsize:=def_cgsize(paradef);
{ for things like formaldef }
if (paracgsize=OS_NO) then
begin
paracgsize:=OS_ADDR;
paralen:=tcgsize2size[OS_ADDR];
end;
end
end;
{ patch FPU values into integer registers if we are processing varargs }
if (isVararg) and (paradef.typ = floatdef) then begin
loc := LOC_REGISTER;
if paracgsize = OS_F64 then
paracgsize := OS_64
else
paracgsize := OS_32;
end;
{ AIX/SysV a), Darwin c) -> skip 4 bytes in the stack frame }
if (target_info.endian=endian_big) and
(paradef.typ=floatdef) and
(tfloatdef(paradef).floattype=s32real) and
(nextfloatreg>RS_F13) then
begin
inc(stack_offset,4);
paraaligned:=true;
end;
{ Darwin d) }
if (target_info.abi=abi_powerpc_darwin) and
(paradef.typ in [orddef,enumdef]) and
(paralen<8) and
{ we don't have to sign/zero extend the lower 8/16/32 bit on the callee
side since it's done on the caller side; however, if the value is
passed via memory, we do have to modify the stack offset since this
is big endian and otherwise we'll load/store the wrong bytes) }
((side=callerside) or
forceintmem or
(nextintreg>RS_R10)) then
begin
if side=callerside then
begin
paralen:=8;
paradef:=s64inttype;
paracgsize:=OS_S64;
end
else
begin
inc(stack_offset,8-paralen);
paraaligned:=true;
end;
end;
para.alignment := std_param_align;
para.size := paracgsize;
para.intsize := paralen;
para.def := paradef;
if (paralen = 0) then
if (paradef.typ = recorddef) then begin
paraloc := para.add_location;
paraloc^.loc := LOC_VOID;
end else
internalerror(2005011310);
if not assigned(alllocdef) then
locdef:=paradef
else
begin
locdef:=alllocdef;
paracgsize:=def_cgsize(locdef);
end;
firstparaloc:=true;
{ can become < 0 for e.g. 3-byte records }
while (paralen > 0) do begin
paraloc := para.add_location;
{ In case of po_delphi_nested_cc, the parent frame pointer
is always passed on the stack. }
if (loc = LOC_REGISTER) and
(nextintreg <= RS_R10) and
not forceintmem then begin
paraloc^.loc := loc;
paraloc^.shiftval := parashift;
{ make sure we don't lose whether or not the type is signed }
if (paracgsize <> OS_NO) and
(paradef.typ <> orddef) and
not assigned(alllocdef) then
begin
paracgsize := int_cgsize(paralen);
locdef:=get_paraloc_def(paradef, paralen, firstparaloc);
end;
{ Partial aggregate data may have to be left-aligned. If so, add tail
padding }
if tailpadding and
(paralen < sizeof(aint)) then
begin
paraloc^.shiftval := (sizeof(aint)-paralen)*(-8);
paraloc^.size := OS_INT;
paraloc^.def := u64inttype;
end
else if (paracgsize in [OS_NO, OS_128, OS_S128]) then
begin
if (paralen>4) or
(parashift<>0) then
begin
paraloc^.size := OS_INT;
paraloc^.def := osuinttype;
end
else
begin
{ for 3-byte records aligned in the lower bits of register }
paraloc^.size := OS_32;
paraloc^.def := u32inttype;
end;
end
else
begin
paraloc^.size := paracgsize;
paraloc^.def := locdef;
end;
paraloc^.register := newreg(R_INTREGISTER, nextintreg, R_SUBNONE);
inc(nextintreg);
dec(paralen, tcgsize2size[paraloc^.size]);
inc(stack_offset, sizeof(pint));
end else if (loc = LOC_FPUREGISTER) and
(nextfloatreg <= RS_F13) then begin
paraloc^.loc := loc;
paraloc^.size := paracgsize;
paraloc^.def := locdef;
paraloc^.register := newreg(R_FPUREGISTER, nextfloatreg, R_SUBWHOLE);
{ the PPC64 ABI says that the GPR index is increased for every parameter, no matter
which type it is stored in }
inc(nextintreg);
inc(nextfloatreg);
dec(paralen, tcgsize2size[paraloc^.size]);
inc(stack_offset, tcgsize2size[OS_FLOAT]);
end else if (loc = LOC_MMREGISTER) then begin
{ Altivec not supported }
internalerror(200510192);
end else begin
{ either LOC_REFERENCE, or one of the above which must be passed on the
stack because of insufficient registers }
paraloc^.loc := LOC_REFERENCE;
case loc of
LOC_FPUREGISTER:
begin
paraloc^.size:=int_float_cgsize(paralen);
case paraloc^.size of
OS_F32: paraloc^.def:=s32floattype;
OS_F64: paraloc^.def:=s64floattype;
else
internalerror(2013060122);
end;
end;
LOC_REGISTER,
LOC_REFERENCE:
begin
paraloc^.size:=int_cgsize(paralen);
paraloc^.def:=get_paraloc_def(paradef, paralen, firstparaloc);
end;
else
internalerror(2006011101);
end;
if (side = callerside) then
paraloc^.reference.index := NR_STACK_POINTER_REG
else begin
{ during procedure entry, NR_OLD_STACK_POINTER_REG contains the old stack pointer }
paraloc^.reference.index := NR_OLD_STACK_POINTER_REG;
{ create_paraloc_info_intern might be also called when being outside of
code generation so current_procinfo might be not set }
if assigned(current_procinfo) then
tppcprocinfo(current_procinfo).needs_frame_pointer := true;
end;
paraloc^.reference.offset := stack_offset;
{ align temp contents to next register size }
if not paraaligned then
inc(stack_offset, align(paralen, 8))
else
inc(stack_offset, paralen);
paralen := 0;
end;
firstparaloc:=false;
end;
end;
function tcpuparamanager.create_varargs_paraloc_info(p: tabstractprocdef;
varargspara: tvarargsparalist): longint;
var
cur_stack_offset: aword;
parasize, l: longint;
curintreg, firstfloatreg, curfloatreg, curmmreg: tsuperregister;
i: integer;
hp: tparavarsym;
paraloc: pcgparalocation;
begin
init_values(curintreg, curfloatreg, curmmreg, cur_stack_offset);
firstfloatreg := curfloatreg;
result := create_paraloc_info_intern(p, callerside, p.paras, curintreg,
curfloatreg, curmmreg, cur_stack_offset, false);
if (p.proccalloption in [pocall_cdecl, pocall_cppdecl, pocall_mwpascal]) then begin
{ just continue loading the parameters in the registers }
result := create_paraloc_info_intern(p, callerside, varargspara, curintreg,
curfloatreg, curmmreg, cur_stack_offset, true);
{ varargs routines have to reserve at least 64 bytes for the PPC64 ABI }
if (result < 64) then
result := 64;
end else begin
parasize := cur_stack_offset;
for i := 0 to varargspara.count - 1 do begin
hp := tparavarsym(varargspara[i]);
hp.paraloc[callerside].alignment := 8;
paraloc := hp.paraloc[callerside].add_location;
paraloc^.loc := LOC_REFERENCE;
paraloc^.size := def_cgsize(hp.vardef);
paraloc^.def := hp.vardef;
paraloc^.reference.index := NR_STACK_POINTER_REG;
l := push_size(hp.varspez, hp.vardef, p.proccalloption);
paraloc^.reference.offset := parasize;
parasize := parasize + l;
end;
result := parasize;
end;
if curfloatreg <> firstfloatreg then
include(varargspara.varargsinfo, va_uses_float_reg);
end;
function tcpuparamanager.parseparaloc(p: tparavarsym; const s: string): boolean;
begin
{ not supported/required for PowerPC64-linux target }
internalerror(200404182);
result := true;
end;
begin
paramanager := tcpuparamanager.create;
end.
|