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
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
|
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build power64 power64le
#include "zasm_GOOS_GOARCH.h"
#include "funcdata.h"
#include "textflag.h"
TEXT runtime·rt0_go(SB),NOSPLIT,$0
// initialize essential registers
BL runtime·reginit(SB)
SUB $24, R1
MOVW R3, 8(R1) // argc
MOVD R4, 16(R1) // argv
// create istack out of the given (operating system) stack.
// _cgo_init may update stackguard.
MOVD $runtime·g0(SB), g
MOVD $(-64*1024), R31
ADD R31, R1, R3
MOVD R3, g_stackguard0(g)
MOVD R3, g_stackguard1(g)
MOVD R3, (g_stack+stack_lo)(g)
MOVD R1, (g_stack+stack_hi)(g)
// TODO: if there is a _cgo_init, call it.
// TODO: add TLS
// set the per-goroutine and per-mach "registers"
MOVD $runtime·m0(SB), R3
// save m->g0 = g0
MOVD g, m_g0(R3)
// save m0 to g0->m
MOVD R3, g_m(g)
BL runtime·check(SB)
// args are already prepared
BL runtime·args(SB)
BL runtime·osinit(SB)
BL runtime·schedinit(SB)
// create a new goroutine to start program
MOVD $runtime·main·f(SB), R3 // entry
MOVDU R3, -8(R1)
MOVDU R0, -8(R1)
MOVDU R0, -8(R1)
BL runtime·newproc(SB)
ADD $24, R1
// start this M
BL runtime·mstart(SB)
MOVD R0, 1(R0)
RETURN
DATA runtime·main·f+0(SB)/8,$runtime·main(SB)
GLOBL runtime·main·f(SB),RODATA,$8
TEXT runtime·breakpoint(SB),NOSPLIT,$-8-0
MOVD R0, 2(R0) // TODO: TD
RETURN
TEXT runtime·asminit(SB),NOSPLIT,$-8-0
RETURN
TEXT runtime·reginit(SB),NOSPLIT,$-8-0
// set R0 to zero, it's expected by the toolchain
XOR R0, R0
// initialize essential FP registers
FMOVD $4503601774854144.0, F27
FMOVD $0.5, F29
FSUB F29, F29, F28
FADD F29, F29, F30
FADD F30, F30, F31
RETURN
/*
* go-routine
*/
// void gosave(Gobuf*)
// save state in Gobuf; setjmp
TEXT runtime·gosave(SB), NOSPLIT, $-8-8
MOVD buf+0(FP), R3
MOVD R1, gobuf_sp(R3)
MOVD LR, R31
MOVD R31, gobuf_pc(R3)
MOVD g, gobuf_g(R3)
MOVD R0, gobuf_lr(R3)
MOVD R0, gobuf_ret(R3)
MOVD R0, gobuf_ctxt(R3)
RETURN
// void gogo(Gobuf*)
// restore state from Gobuf; longjmp
TEXT runtime·gogo(SB), NOSPLIT, $-8-8
MOVD buf+0(FP), R5
MOVD gobuf_g(R5), g // make sure g is not nil
MOVD 0(g), R4
MOVD gobuf_sp(R5), R1
MOVD gobuf_lr(R5), R31
MOVD R31, LR
MOVD gobuf_ret(R5), R3
MOVD gobuf_ctxt(R5), R11
MOVD R0, gobuf_sp(R5)
MOVD R0, gobuf_ret(R5)
MOVD R0, gobuf_lr(R5)
MOVD R0, gobuf_ctxt(R5)
CMP R0, R0 // set condition codes for == test, needed by stack split
MOVD gobuf_pc(R5), R31
MOVD R31, CTR
BR (CTR)
// void mcall(fn func(*g))
// Switch to m->g0's stack, call fn(g).
// Fn must never return. It should gogo(&g->sched)
// to keep running g.
TEXT runtime·mcall(SB), NOSPLIT, $-8-8
// Save caller state in g->sched
MOVD R1, (g_sched+gobuf_sp)(g)
MOVD LR, R31
MOVD R31, (g_sched+gobuf_pc)(g)
MOVD R0, (g_sched+gobuf_lr)(g)
MOVD g, (g_sched+gobuf_g)(g)
// Switch to m->g0 & its stack, call fn.
MOVD g, R3
MOVD g_m(g), R8
MOVD m_g0(R8), g
CMP g, R3
BNE 2(PC)
BR runtime·badmcall(SB)
MOVD fn+0(FP), R11 // context
MOVD 0(R11), R4 // code pointer
MOVD R4, CTR
MOVD (g_sched+gobuf_sp)(g), R1 // sp = m->g0->sched.sp
MOVDU R3, -8(R1)
MOVDU R0, -8(R1)
BL (CTR)
BR runtime·badmcall2(SB)
// switchtoM is a dummy routine that onM leaves at the bottom
// of the G stack. We need to distinguish the routine that
// lives at the bottom of the G stack from the one that lives
// at the top of the M stack because the one at the top of
// the M stack terminates the stack walk (see topofstack()).
TEXT runtime·switchtoM(SB), NOSPLIT, $0-0
UNDEF
BL (LR) // make sure this function is not leaf
RETURN
// func onM_signalok(fn func())
TEXT runtime·onM_signalok(SB), NOSPLIT, $8-8
MOVD g, R3 // R3 = g
MOVD g_m(R3), R4 // R4 = g->m
MOVD m_gsignal(R4), R4 // R4 = g->m->gsignal
MOVD fn+0(FP), R11 // context for call below
CMP R3, R4
BEQ onsignal
MOVD R11, 8(R1)
BL runtime·onM(SB)
RETURN
onsignal:
MOVD 0(R11), R3 // code pointer
MOVD R3, CTR
BL (CTR)
RETURN
// void onM(fn func())
TEXT runtime·onM(SB), NOSPLIT, $0-8
MOVD fn+0(FP), R3 // R3 = fn
MOVD R3, R11 // context
MOVD g_m(g), R4 // R4 = m
MOVD m_g0(R4), R5 // R5 = g0
CMP g, R5
BEQ onm
MOVD m_curg(R4), R6
CMP g, R6
BEQ oncurg
// Not g0, not curg. Must be gsignal, but that's not allowed.
// Hide call from linker nosplit analysis.
MOVD $runtime·badonm(SB), R3
MOVD R3, CTR
BL (CTR)
oncurg:
// save our state in g->sched. Pretend to
// be switchtoM if the G stack is scanned.
MOVD $runtime·switchtoM(SB), R6
ADD $8, R6 // get past prologue
MOVD R6, (g_sched+gobuf_pc)(g)
MOVD R1, (g_sched+gobuf_sp)(g)
MOVD R0, (g_sched+gobuf_lr)(g)
MOVD g, (g_sched+gobuf_g)(g)
// switch to g0
MOVD R5, g
MOVD (g_sched+gobuf_sp)(g), R3
// make it look like mstart called onM on g0, to stop traceback
SUB $8, R3
MOVD $runtime·mstart(SB), R4
MOVD R4, 0(R3)
MOVD R3, R1
// call target function
MOVD 0(R11), R3 // code pointer
MOVD R3, CTR
BL (CTR)
// switch back to g
MOVD g_m(g), R3
MOVD m_curg(R3), g
MOVD (g_sched+gobuf_sp)(g), R1
MOVD R0, (g_sched+gobuf_sp)(g)
RETURN
onm:
// already on m stack, just call directly
MOVD 0(R11), R3 // code pointer
MOVD R3, CTR
BL (CTR)
RETURN
/*
* support for morestack
*/
// Called during function prolog when more stack is needed.
// Caller has already loaded:
// R3: framesize, R4: argsize, R5: LR
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must
// record an argument size. For that purpose, it has no arguments.
TEXT runtime·morestack(SB),NOSPLIT,$-8-0
// Cannot grow scheduler stack (m->g0).
MOVD g_m(g), R7
MOVD m_g0(R7), R8
CMP g, R8
BNE 2(PC)
BL runtime·abort(SB)
// Cannot grow signal stack (m->gsignal).
MOVD m_gsignal(R7), R8
CMP g, R8
BNE 2(PC)
BL runtime·abort(SB)
// Called from f.
// Set g->sched to context in f.
MOVD R11, (g_sched+gobuf_ctxt)(g)
MOVD R1, (g_sched+gobuf_sp)(g)
MOVD LR, R8
MOVD R8, (g_sched+gobuf_pc)(g)
MOVD R5, (g_sched+gobuf_lr)(g)
// Called from f.
// Set m->morebuf to f's caller.
MOVD R5, (m_morebuf+gobuf_pc)(R7) // f's caller's PC
MOVD R1, (m_morebuf+gobuf_sp)(R7) // f's caller's SP
MOVD g, (m_morebuf+gobuf_g)(R7)
// Call newstack on m->g0's stack.
MOVD m_g0(R7), g
MOVD (g_sched+gobuf_sp)(g), R1
BL runtime·newstack(SB)
// Not reached, but make sure the return PC from the call to newstack
// is still in this function, and not the beginning of the next.
UNDEF
TEXT runtime·morestack_noctxt(SB),NOSPLIT,$-8-0
MOVD R0, R11
BR runtime·morestack(SB)
// reflectcall: call a function with the given argument list
// func call(f *FuncVal, arg *byte, argsize, retoffset uint32).
// we don't have variable-sized frames, so we use a small number
// of constant-sized-frame functions to encode a few bits of size in the pc.
// Caution: ugly multiline assembly macros in your future!
#define DISPATCH(NAME,MAXSIZE) \
MOVD $MAXSIZE, R31; \
CMP R3, R31; \
BGT 4(PC); \
MOVD $NAME(SB), R31; \
MOVD R31, CTR; \
BR (CTR)
// Note: can't just "BR NAME(SB)" - bad inlining results.
TEXT ·reflectcall(SB), NOSPLIT, $-8-24
MOVWZ n+16(FP), R3
DISPATCH(runtime·call16, 16)
DISPATCH(runtime·call32, 32)
DISPATCH(runtime·call64, 64)
DISPATCH(runtime·call128, 128)
DISPATCH(runtime·call256, 256)
DISPATCH(runtime·call512, 512)
DISPATCH(runtime·call1024, 1024)
DISPATCH(runtime·call2048, 2048)
DISPATCH(runtime·call4096, 4096)
DISPATCH(runtime·call8192, 8192)
DISPATCH(runtime·call16384, 16384)
DISPATCH(runtime·call32768, 32768)
DISPATCH(runtime·call65536, 65536)
DISPATCH(runtime·call131072, 131072)
DISPATCH(runtime·call262144, 262144)
DISPATCH(runtime·call524288, 524288)
DISPATCH(runtime·call1048576, 1048576)
DISPATCH(runtime·call2097152, 2097152)
DISPATCH(runtime·call4194304, 4194304)
DISPATCH(runtime·call8388608, 8388608)
DISPATCH(runtime·call16777216, 16777216)
DISPATCH(runtime·call33554432, 33554432)
DISPATCH(runtime·call67108864, 67108864)
DISPATCH(runtime·call134217728, 134217728)
DISPATCH(runtime·call268435456, 268435456)
DISPATCH(runtime·call536870912, 536870912)
DISPATCH(runtime·call1073741824, 1073741824)
MOVD $runtime·badreflectcall(SB), R31
MOVD R31, CTR
BR (CTR)
#define CALLFN(NAME,MAXSIZE) \
TEXT NAME(SB), WRAPPER, $MAXSIZE-24; \
NO_LOCAL_POINTERS; \
/* copy arguments to stack */ \
MOVD arg+8(FP), R3; \
MOVWZ n+16(FP), R4; \
MOVD R1, R5; \
ADD $(8-1), R5; \
SUB $1, R3; \
ADD R5, R4; \
CMP R5, R4; \
BEQ 4(PC); \
MOVBZU 1(R3), R6; \
MOVBZU R6, 1(R5); \
BR -4(PC); \
/* call function */ \
MOVD f+0(FP), R11; \
MOVD (R11), R31; \
MOVD R31, CTR; \
PCDATA $PCDATA_StackMapIndex, $0; \
BL (CTR); \
/* copy return values back */ \
MOVD arg+8(FP), R3; \
MOVWZ n+16(FP), R4; \
MOVWZ retoffset+20(FP), R6; \
MOVD R1, R5; \
ADD R6, R5; \
ADD R6, R3; \
SUB R6, R4; \
ADD $(8-1), R5; \
SUB $1, R3; \
ADD R5, R4; \
CMP R5, R4; \
BEQ 4(PC); \
MOVBZU 1(R5), R6; \
MOVBZU R6, 1(R3); \
BR -4(PC); \
RETURN
CALLFN(·call16, 16)
CALLFN(·call32, 32)
CALLFN(·call64, 64)
CALLFN(·call128, 128)
CALLFN(·call256, 256)
CALLFN(·call512, 512)
CALLFN(·call1024, 1024)
CALLFN(·call2048, 2048)
CALLFN(·call4096, 4096)
CALLFN(·call8192, 8192)
CALLFN(·call16384, 16384)
CALLFN(·call32768, 32768)
CALLFN(·call65536, 65536)
CALLFN(·call131072, 131072)
CALLFN(·call262144, 262144)
CALLFN(·call524288, 524288)
CALLFN(·call1048576, 1048576)
CALLFN(·call2097152, 2097152)
CALLFN(·call4194304, 4194304)
CALLFN(·call8388608, 8388608)
CALLFN(·call16777216, 16777216)
CALLFN(·call33554432, 33554432)
CALLFN(·call67108864, 67108864)
CALLFN(·call134217728, 134217728)
CALLFN(·call268435456, 268435456)
CALLFN(·call536870912, 536870912)
CALLFN(·call1073741824, 1073741824)
// bool cas(uint32 *ptr, uint32 old, uint32 new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// } else
// return 0;
TEXT runtime·cas(SB), NOSPLIT, $0-17
MOVD ptr+0(FP), R3
MOVWZ old+8(FP), R4
MOVWZ new+12(FP), R5
cas_again:
SYNC
LWAR (R3), R6
CMPW R6, R4
BNE cas_fail
STWCCC R5, (R3)
BNE cas_again
MOVD $1, R3
SYNC
ISYNC
MOVB R3, ret+16(FP)
RETURN
cas_fail:
MOVD $0, R3
BR -5(PC)
// bool runtime·cas64(uint64 *ptr, uint64 old, uint64 new)
// Atomically:
// if(*val == *old){
// *val = new;
// return 1;
// } else {
// return 0;
// }
TEXT runtime·cas64(SB), NOSPLIT, $0-25
MOVD ptr+0(FP), R3
MOVD old+8(FP), R4
MOVD new+16(FP), R5
cas64_again:
SYNC
LDAR (R3), R6
CMP R6, R4
BNE cas64_fail
STDCCC R5, (R3)
BNE cas64_again
MOVD $1, R3
SYNC
ISYNC
MOVB R3, ret+24(FP)
RETURN
cas64_fail:
MOVD $0, R3
BR -5(PC)
TEXT runtime·casuintptr(SB), NOSPLIT, $0-25
BR runtime·cas64(SB)
TEXT runtime·atomicloaduintptr(SB), NOSPLIT, $-8-16
BR runtime·atomicload64(SB)
TEXT runtime·atomicloaduint(SB), NOSPLIT, $-8-16
BR runtime·atomicload64(SB)
TEXT runtime·atomicstoreuintptr(SB), NOSPLIT, $0-16
BR runtime·atomicstore64(SB)
// bool casp(void **val, void *old, void *new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// } else
// return 0;
TEXT runtime·casp(SB), NOSPLIT, $0-25
BR runtime·cas64(SB)
// uint32 xadd(uint32 volatile *ptr, int32 delta)
// Atomically:
// *val += delta;
// return *val;
TEXT runtime·xadd(SB), NOSPLIT, $0-20
MOVD ptr+0(FP), R4
MOVW delta+8(FP), R5
SYNC
LWAR (R4), R3
ADD R5, R3
STWCCC R3, (R4)
BNE -4(PC)
SYNC
ISYNC
MOVW R3, ret+16(FP)
RETURN
TEXT runtime·xadd64(SB), NOSPLIT, $0-24
MOVD ptr+0(FP), R4
MOVD delta+8(FP), R5
SYNC
LDAR (R4), R3
ADD R5, R3
STDCCC R3, (R4)
BNE -4(PC)
SYNC
ISYNC
MOVD R3, ret+16(FP)
RETURN
TEXT runtime·xchg(SB), NOSPLIT, $0-20
MOVD ptr+0(FP), R4
MOVW new+8(FP), R5
SYNC
LWAR (R4), R3
STWCCC R5, (R4)
BNE -3(PC)
SYNC
ISYNC
MOVW R3, ret+16(FP)
RETURN
TEXT runtime·xchg64(SB), NOSPLIT, $0-24
MOVD ptr+0(FP), R4
MOVD new+8(FP), R5
SYNC
LDAR (R4), R3
STDCCC R5, (R4)
BNE -3(PC)
SYNC
ISYNC
MOVD R3, ret+16(FP)
RETURN
TEXT runtime·xchgp(SB), NOSPLIT, $0-24
BR runtime·xchg64(SB)
TEXT runtime·xchguintptr(SB), NOSPLIT, $0-24
BR runtime·xchg64(SB)
TEXT runtime·procyield(SB),NOSPLIT,$0-0
RETURN
TEXT runtime·atomicstorep(SB), NOSPLIT, $0-16
BR runtime·atomicstore64(SB)
TEXT runtime·atomicstore(SB), NOSPLIT, $0-12
MOVD ptr+0(FP), R3
MOVW val+8(FP), R4
SYNC
MOVW R4, 0(R3)
RETURN
TEXT runtime·atomicstore64(SB), NOSPLIT, $0-16
MOVD ptr+0(FP), R3
MOVD val+8(FP), R4
SYNC
MOVD R4, 0(R3)
RETURN
// void runtime·atomicor8(byte volatile*, byte);
TEXT runtime·atomicor8(SB), NOSPLIT, $0-9
MOVD ptr+0(FP), R3
MOVBZ val+8(FP), R4
// Align ptr down to 4 bytes so we can use 32-bit load/store.
// R5 = (R3 << 0) & ~3
RLDCR $0, R3, $~3, R5
// Compute val shift.
#ifdef GOARCH_power64
// Big endian. ptr = ptr ^ 3
XOR $3, R3
#endif
// R6 = ((ptr & 3) * 8) = (ptr << 3) & (3*8)
RLDC $3, R3, $(3*8), R6
// Shift val for aligned ptr. R4 = val << R6
SLD R6, R4, R4
atomicor8_again:
SYNC
LWAR (R5), R6
OR R4, R6
STWCCC R6, (R5)
BNE atomicor8_again
SYNC
ISYNC
RETURN
// void jmpdefer(fv, sp);
// called from deferreturn.
// 1. grab stored LR for caller
// 2. sub 4 bytes to get back to BL deferreturn
// 3. BR to fn
TEXT runtime·jmpdefer(SB), NOSPLIT, $-8-16
MOVD 0(R1), R31
SUB $4, R31
MOVD R31, LR
MOVD fv+0(FP), R11
MOVD argp+8(FP), R1
SUB $8, R1
MOVD 0(R11), R3
MOVD R3, CTR
BR (CTR)
// Save state of caller into g->sched. Smashes R31.
TEXT gosave<>(SB),NOSPLIT,$-8
MOVD LR, R31
MOVD R31, (g_sched+gobuf_pc)(g)
MOVD R1, (g_sched+gobuf_sp)(g)
MOVD R0, (g_sched+gobuf_lr)(g)
MOVD R0, (g_sched+gobuf_ret)(g)
MOVD R0, (g_sched+gobuf_ctxt)(g)
RETURN
// asmcgocall(void(*fn)(void*), void *arg)
// Call fn(arg) on the scheduler stack,
// aligned appropriately for the gcc ABI.
// See cgocall.c for more details.
TEXT ·asmcgocall(SB),NOSPLIT,$0-16
MOVD R0, 21(R0)
// cgocallback(void (*fn)(void*), void *frame, uintptr framesize)
// Turn the fn into a Go func (by taking its address) and call
// cgocallback_gofunc.
TEXT runtime·cgocallback(SB),NOSPLIT,$24-24
MOVD R0, 22(R0)
// cgocallback_gofunc(FuncVal*, void *frame, uintptr framesize)
// See cgocall.c for more details.
TEXT ·cgocallback_gofunc(SB),NOSPLIT,$8-24
MOVD R0, 23(R0)
// void setg(G*); set g. for use by needm.
TEXT runtime·setg(SB), NOSPLIT, $0-8
MOVD R0, 24(R0)
// void setg_gcc(G*); set g called from gcc.
TEXT setg_gcc<>(SB),NOSPLIT,$0
MOVD R0, 25(R0)
TEXT runtime·getcallerpc(SB),NOSPLIT,$-8-16
MOVD 0(R1), R3
MOVD R3, ret+8(FP)
RETURN
TEXT runtime·gogetcallerpc(SB),NOSPLIT,$-8-16
MOVD 0(R1), R3
MOVD R3,ret+8(FP)
RETURN
TEXT runtime·setcallerpc(SB),NOSPLIT,$-8-16
MOVD pc+8(FP), R3
MOVD R3, 0(R1) // set calling pc
RETURN
TEXT runtime·getcallersp(SB),NOSPLIT,$0-16
MOVD argp+0(FP), R3
SUB $8, R3
MOVD R3, ret+8(FP)
RETURN
// func gogetcallersp(p unsafe.Pointer) uintptr
TEXT runtime·gogetcallersp(SB),NOSPLIT,$0-16
MOVD sp+0(FP), R3
SUB $8, R3
MOVD R3,ret+8(FP)
RETURN
TEXT runtime·abort(SB),NOSPLIT,$-8-0
MOVW (R0), R0
UNDEF
#define TBRL 268
#define TBRU 269 /* Time base Upper/Lower */
// int64 runtime·cputicks(void)
TEXT runtime·cputicks(SB),NOSPLIT,$0-8
MOVW SPR(TBRU), R4
MOVW SPR(TBRL), R3
MOVW SPR(TBRU), R5
CMPW R4, R5
BNE -4(PC)
SLD $32, R5
OR R5, R3
MOVD R3, ret+0(FP)
RETURN
// AES hashing not implemented for Power
TEXT runtime·aeshash(SB),NOSPLIT,$-8-0
MOVW (R0), R1
TEXT runtime·aeshash32(SB),NOSPLIT,$-8-0
MOVW (R0), R1
TEXT runtime·aeshash64(SB),NOSPLIT,$-8-0
MOVW (R0), R1
TEXT runtime·aeshashstr(SB),NOSPLIT,$-8-0
MOVW (R0), R1
TEXT runtime·memeq(SB),NOSPLIT,$-8-25
MOVD a+0(FP), R3
MOVD b+8(FP), R4
MOVD size+16(FP), R5
SUB $1, R3
SUB $1, R4
ADD R3, R5, R8
loop:
CMP R3, R8
BNE test
MOVD $1, R3
MOVB R3, ret+24(FP)
RETURN
test:
MOVBZU 1(R3), R6
MOVBZU 1(R4), R7
CMP R6, R7
BEQ loop
MOVB R0, ret+24(FP)
RETURN
// eqstring tests whether two strings are equal.
// See runtime_test.go:eqstring_generic for
// equivalent Go code.
TEXT runtime·eqstring(SB),NOSPLIT,$0-33
MOVD s1len+8(FP), R4
MOVD s2len+24(FP), R5
CMP R4, R5
BNE noteq
MOVD s1str+0(FP), R3
MOVD s2str+16(FP), R4
SUB $1, R3
SUB $1, R4
ADD R3, R5, R8
loop:
CMP R3, R8
BNE 4(PC)
MOVD $1, R3
MOVB R3, ret+32(FP)
RETURN
MOVBZU 1(R3), R6
MOVBZU 1(R4), R7
CMP R6, R7
BEQ loop
noteq:
MOVB R0, ret+32(FP)
RETURN
// TODO: share code with memeq?
TEXT bytes·Equal(SB),NOSPLIT,$0-49
MOVD a_len+8(FP), R3
MOVD b_len+32(FP), R4
CMP R3, R4 // unequal lengths are not equal
BNE noteq
MOVD a+0(FP), R5
MOVD b+24(FP), R6
SUB $1, R5
SUB $1, R6
ADD R5, R3 // end-1
loop:
CMP R5, R3
BEQ equal // reached the end
MOVBZU 1(R5), R4
MOVBZU 1(R6), R7
CMP R4, R7
BEQ loop
noteq:
MOVBZ R0, ret+48(FP)
RETURN
equal:
MOVD $1, R3
MOVBZ R3, ret+48(FP)
RETURN
TEXT bytes·IndexByte(SB),NOSPLIT,$0-40
MOVD s+0(FP), R3
MOVD s_len+8(FP), R4
MOVBZ c+24(FP), R5 // byte to find
MOVD R3, R6 // store base for later
SUB $1, R3
ADD R3, R4 // end-1
loop:
CMP R3, R4
BEQ notfound
MOVBZU 1(R3), R7
CMP R7, R5
BNE loop
SUB R6, R3 // remove base
MOVD R3, ret+32(FP)
RETURN
notfound:
MOVD $-1, R3
MOVD R3, ret+32(FP)
RETURN
TEXT strings·IndexByte(SB),NOSPLIT,$0
MOVD p+0(FP), R3
MOVD b_len+8(FP), R4
MOVBZ c+16(FP), R5 // byte to find
MOVD R3, R6 // store base for later
SUB $1, R3
ADD R3, R4 // end-1
loop:
CMP R3, R4
BEQ notfound
MOVBZU 1(R3), R7
CMP R7, R5
BNE loop
SUB R6, R3 // remove base
MOVD R3, ret+24(FP)
RETURN
notfound:
MOVD $-1, R3
MOVD R3, ret+24(FP)
RETURN
// A Duff's device for zeroing memory.
// The compiler jumps to computed addresses within
// this routine to zero chunks of memory. Do not
// change this code without also changing the code
// in ../../cmd/9g/ggen.c:/^clearfat.
// R0: always zero
// R3 (aka REGRT1): ptr to memory to be zeroed - 8
// On return, R3 points to the last zeroed dword.
TEXT runtime·duffzero(SB), NOSPLIT, $-8-0
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
MOVDU R0, 8(R3)
RETURN
TEXT runtime·fastrand1(SB), NOSPLIT, $0-4
MOVD g_m(g), R4
MOVWZ m_fastrand(R4), R3
ADD R3, R3
CMPW R3, $0
BGE 2(PC)
XOR $0x88888eef, R3
MOVW R3, m_fastrand(R4)
MOVW R3, ret+0(FP)
RETURN
TEXT runtime·return0(SB), NOSPLIT, $0
MOVW $0, R3
RETURN
// Called from cgo wrappers, this function returns g->m->curg.stack.hi.
// Must obey the gcc calling convention.
TEXT _cgo_topofstack(SB),NOSPLIT,$0
MOVD R0, 26(R0)
// The top-most function running on a goroutine
// returns to goexit+PCQuantum.
TEXT runtime·goexit(SB),NOSPLIT,$-8-0
MOVD R0, R0 // NOP
BL runtime·goexit1(SB) // does not return
|