source: CLRX/CLRadeonExtender/trunk/doc/ClrxAsmAmdCl2.md @ 3712

Last change on this file since 3712 was 3712, checked in by matszpk, 3 years ago

CLRadeonExtender: AmdCL2: Handle vectypehint and work_group_size_hint in kernel metadata. Add '.vectypehint' and '.work_group_size_hint' pseudo-ops
to AmdCL2 format handling. Add new pseudo-ops to editor's syntaxes.

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1## CLRadeonExtender Assembler AMD Catalyst OpenCL 2.0 handling
2
3The AMD Catalyst driver provides own OpenCL implementation that can generates
4own binaries of the OpenCL programs. The CLRX assembler supports both OpenCL 1.2
5and OpenCL 2.0 binary format. This chapter describes Amd OpenCL 2.0 binary format.
6The first Catalyst drivers uses this format for OpenCL 2.0 programs.
7Current AMD drivers uses this format for OpenCL 1.2 and OpenCL 2.0 programs for
8GCN 1.1 and later architectures.
9
10## Binary format
11
12An AMD Catalyst binary format for OpenCL 2.0 support significantly differs from
13prevbious binary format for OpenCL 1.2. The Kernel codes are in single text inner binary.
14Instead of AMD CAL notes and ProgInfo entries, the kernel setup is in special
15format structure. Metadatas mainly holds arguments definitions of kernels.
16
17A CLRadeonExtender supports two versions of binary formats for OpenCL 2.0: newer (since
18AMD OpenCL 1912.05) and older (before 1912.05 driver version).
19
20Special section to define global data for all kernels:
21
22* `rodata`, `.globaldata` - read-only constant (global) data
23* `.rwdata`, `.data` - read-write global data
24* `.bss`, `.bssdata` - allocatable read-write data
25
26## Relocations
27
28An CLRX assembler handles relocations to symbol at global data, global rwdata and
29global bss data in kernel code. These relocations can be applied to places that accepts
3032-bit literal immediates. Only two types of relocations is allowed:
31
32* `place`, `place&0xffffffff`, `place%0x10000000`, `place%%0x10000000` -
33low 32 bits of value
34* `place>>32`, `place/0x100000000`, `place//0x100000000` - high 32 bits of value
35
36The `place` indicates an expression that result points to some place in one of
37allowed sections.
38
39Examples:
40
41```
42s_mov_b32       s13, (gdata+152)>>32
43s_mov_b32       s12, (gdata+152)&0xffffffff
44s_mov_b32       s15, (gdata+160)>>32
45s_mov_b32       s14, (gdata+160)&0xffffffff
46```
47
48## Layout of the source code
49
50The CLRX assembler allow to use one of two ways to configure kernel setup:
51for human (`.config`) and for quick recompilation (kernel setup, stub, metadata content).
52
53## Register usage setup
54
55The CLRX assembler automatically sets number of used VGPRs and number of used SGPRs.
56This setup can be replaced by pseudo-ops '.sgprsnum' and '.vgprsnum'.
57
58## Scalar register allocation
59
60Depend on configuration options, an assembler add VCC and FLAT_SCRATCH
61(if `.useenqueue` or `.usegeneric` enabled).
62In HSA configuration mode, a special fields determines
63what extra SGPR extra has been added.
64
65## List of the specific pseudo-operations
66
67### .acl_version
68
69Syntax: .acl_version "STRING"
70
71Set ACL version string.
72
73### .arch_minor
74
75Syntax: .arch_minor ARCH_MINOR
76
77Set architecture minor number.
78
79### .arch_stepping
80
81Syntax: .arch_minor ARCH_STEPPING
82
83Set architecture stepping number.
84
85### .arg
86
87Syntax for scalar: .arg ARGNAME \[, "ARGTYPENAME"], ARGTYPE[, unused] 
88Syntax for structure: .arg ARGNAME, \[, "ARGTYPENAME"], ARGTYPE[, STRUCTSIZE[, unused]] 
89Syntax for image: .arg ARGNAME\[, "ARGTYPENAME"], ARGTYPE[, [ACCESS] [, RESID[, unused]]] 
90Syntax for sampler: .arg ARGNAME\[, "ARGTYPENAME"], ARGTYPE[, RESID[, unused]] 
91Syntax for global pointer: .arg ARGNAME\[, "ARGTYPENAME"],
92ARGTYPE\[\[, STRUCTSIZE], PTRSPACE[, [ACCESS] [, unused]]] 
93Syntax for local pointer: .arg ARGNAME\[, "ARGTYPENAME"],
94ARGTYPE\[\[, STRUCTSIZE], PTRSPACE[, [ACCESS] [, unused]]] 
95Syntax for constant pointer: .arg ARGNAME\[, "ARGTYPENAME"],
96ARGTYPE\[\[, STRUCTSIZE], PTRSPACE\[, [ACCESS] [, [CONSTSIZE] [, unused]]]
97
98Adds kernel argument definition. Must be inside any kernel configuration. First argument is
99argument name from OpenCL kernel definition. Next optional argument is argument type name
100from OpenCL kernel definition. Next arugment is argument type:
101
102* char, uchar, short, ushort, int, uint, ulong, long, float, double - simple scalar types
103* charX, ucharX, shortX, ushortX, intX, uintX, ulongX, longX, floatX, doubleX - vector types
104(X indicates number of elements: 2, 3, 4, 8 or 16)
105* structure - structure
106* image, image1d, image1d_array, image1d_buffer, image2d, image2d_array, image3d -
107image types
108* sampler - sampler
109* queue - command queue
110* clkevent - clkevent
111* type* - pointer to data
112
113Rest of the argument depends on type of the kernel argument. STRUCTSIZE determines size of
114structure. ACCESS for image determines can be one of the: `read_only`, `rdonly` or
115`write_only`, `wronly`.
116PTRSPACE determines space where pointer points to.
117It can be one of: `local`, `constant` or `global`.
118ACCESS for pointers can be: `const`, `restrict` and `volatile`.
119CONSTSIZE determines maximum size in bytes for constant buffer.
120RESID determines resource id (only for samplers and images).
121
122* for read only images range is in 0-127.
123* for other images is in 0-63.
124* for samplers is in 0-15.
125
126The last argument `unused` indicates that argument will not be used by kernel. In this
127argument can be given 'rdonly' (argument used for read-only) and 'wronly'
128(argument used for write-only).
129
130Sample usage:
131
132```
133.arg v1,"double_t",double
134.arg v2,double2
135.arg v3,double3
136.arg v23,image2d,
137.arg v30,image2d,,5
138.arg v41,ulong16  *,global
139.arg v42,ulong16  *,global, restrict
140.arg v57,structure*,82,global
141```
142
143### .bssdata
144
145Syntax: .bssdata [align=ALIGNMENT]
146
147Go to global data bss section. Optional argument sets alignment of section.
148
149### .call_convention
150
151Syntax: .call_convention CALL_CONV
152
153This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
154Set call convention for kernel.
155
156### .codeversion
157
158Syntax .codeversion MAJOR, MINOR
159
160This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
161Set AMD code version.
162
163### .compile_options
164
165Syntax: .compile_options "STRING"
166
167Set compile options for this binary.
168
169### .config
170
171Open kernel configuration. Must be inside kernel. Kernel configuration can not be
172defined if any isametadata, metadata or stub was defined.
173Following pseudo-ops can be inside kernel config:
174
175* .arg
176* .cws
177* .debugmode
178* .dims
179* .dx10clamp
180* .exceptions
181* .localsize
182* .ieeemode
183* .pgmrsrc1
184* .pgmrsrc2
185* .priority
186* .privmode
187* .sampler
188* .scratchbuffer
189* .setupargs
190* .sgprsnum
191* .tgsize
192* .uavid
193* .useargs
194* .useenqueue
195* .usegeneric
196* .usesetup
197* .vgprsnum
198
199### .control_directive
200
201Open control directive section. This section must be 128 bytes. The content of this
202section will be stored in control_directive field in kernel configuration.
203Must be defined inside kernel.
204
205### .cws, .reqd_work_group_size
206
207Syntax: .cws SIZEHINT[, SIZEHINT[, SIZEHINT]]
208Syntax: .reqd_work_group_size SIZEHINT[, SIZEHINT[, SIZEHINT]]
209
210This pseudo-operation must be inside any kernel configuration.
211Set reqd_work_group_size hint for this kernel.
212
213### .debug_private_segment_buffer_sgpr
214
215Syntax: .debug_private_segment_buffer_sgpr SGPRREG
216
217This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
218`debug_private_segment_buffer_sgpr` field in kernel configuration.
219
220### .debug_wavefront_private_segment_offset_sgpr
221
222Syntax: .debug_wavefront_private_segment_offset_sgpr SGPRREG
223
224This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
225`debug_wavefront_private_segment_offset_sgpr` field in kernel configuration.
226
227### .debugmode
228
229This pseudo-operation must be inside any kernel configuration.
230Enable usage of the DEBUG_MODE.
231
232### .default_hsa_features
233
234This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
235It sets default HSA kernel features and register features (extra SGPR registers usage).
236These default features are `.use_private_segment_buffer`, `.use_kernarg_segment_ptr`,
237`.use_ptr64` (if 64-bit binaries) and private_elem_size is 4 bytes.
238
239### .dims
240
241Syntax: .dims DIMENSIONS
242
243This pseudo-operation must be inside any kernel configuration. Defines what dimensions
244(from list: x, y, z) will be used to determine space of the kernel execution.
245
246### .driver_version
247
248Syntax: .driver_version VERSION
249
250Set driver version for this binary. Version in form: MajorVersion*100+MinorVersion.
251This pseudo-op replaces driver info.
252
253### .dx10clamp
254
255This pseudo-operation must be inside any kernel configuration.
256Enable usage of the DX10_CLAMP.
257
258### .exceptions
259
260Syntax: .exceptions EXCPMASK
261
262This pseudo-operation must be inside any kernel configuration.
263Set exception mask in PGMRSRC2 register value. Value should be 7-bit.
264
265### .gds_segment_size
266
267Syntax: .gds_segment_size SIZE
268
269This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
270`gds_segment_size` field in kernel configuration.
271
272### .gdssize
273
274Syntax: .gdssize SIZE
275
276This pseudo-operation must be inside any kernel configuration. Set the GDS
277(global data share) size.
278
279### .get_driver_version
280
281Syntax: .get_driver_version SYMBOL
282
283Store current driver version to SYMBOL. Version in form `version*100 + revision`.
284
285### .globaldata
286
287Go to constant global data section.
288
289### .group_segment_align
290
291Syntax: .group_segment_align ALIGN
292
293This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
294`group_segment_align` field in kernel configuration.
295
296### .hsaconfig
297
298Open kernel HSA configuration. Must be inside kernel. Kernel configuration can not be
299defined if any isametadata, metadata or stub was defined. Do not mix with `.config`.
300
301### .ieeemode
302
303This pseudo-op must be inside any kernel configuration. Set ieee-mode.
304
305### .inner
306
307Go to inner binary place. By default assembler is in main binary.
308
309### .isametadata
310
311This pseudo-operation must be inside kernel. Go to ISA metadata content
312(only older driver binaries).
313
314### .kernarg_segment_align
315
316Syntax: .kernarg_segment_align ALIGN
317
318This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
319`kernarg_segment_alignment` field in kernel configuration. Value must be a power of two.
320
321### .kernarg_segment_size
322
323Syntax: .kernarg_segment_size SIZE
324
325This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
326`kernarg_segment_byte_size` field in kernel configuration.
327
328### .kernel_code_entry_offset
329
330Syntax: .kernel_code_entry_offset OFFSET
331
332This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
333`kernel_code_entry_byte_offset` field in kernel configuration. This field
334store offset between configuration and kernel code. By default is 256.
335
336### .kernel_code_prefetch_offset
337
338Syntax: .kernel_code_prefetch_offset OFFSET
339
340This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
341`kernel_code_prefetch_byte_offset` field in kernel configuration.
342
343### .kernel_code_prefetch_size
344
345Syntax: .kernel_code_prefetch_size OFFSET
346
347This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
348`kernel_code_prefetch_byte_size` field in kernel configuration.
349
350### .localsize
351
352Syntax: .localsize SIZE
353
354This pseudo-operation must be inside any kernel configuration. Set the initial
355local data size.
356
357### .machine
358
359Syntax: .machine KIND, MAJOR, MINOR, STEPPING
360
361This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
362machine version fields in kernel configuration.
363
364### .max_scratch_backing_memory
365
366Syntax: .max_scratch_backing_memory SIZE
367
368This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
369`max_scratch_backing_memory_byte_size` field in kernel configuration.
370
371### .metadata
372
373This pseudo-operation must be inside kernel. Go to metadata content.
374
375### .pgmrsrc1
376
377Syntax: .pgmrsrc1 VALUE
378
379This pseudo-operation must be inside kernel.
380Defines value of the PGMRSRC1.
381
382
383### .pgmrsrc2
384
385Syntax: .pgmrsrc2 VALUE
386
387This pseudo-operation must be inside any kernel configuration. Set PGMRSRC2 value.
388If dimensions is set then bits that controls dimension setup will be ignored.
389SCRATCH_EN bit will be ignored.
390
391### .priority
392
393Syntax: .priority PRIORITY
394
395This pseudo-operation must be inside kernel. Defines priority (0-3).
396
397### .private_elem_size
398
399Syntax: .private_elem_size ELEMSIZE
400
401This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
402Set `private_element_size` field in kernel configuration.
403Must be a power of two between 2 and 16.
404
405### .private_segment_align
406
407Syntax: .private_segment ALIGN
408
409This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
410`private_segment_alignment` field in kernel configuration. Value must be a power of two.
411
412### .privmode
413
414This pseudo-operation must be inside kernel.
415Enable usage of the PRIV (privileged mode).
416
417### .reserved_sgprs
418
419Syntax: .reserved_sgprs FIRSTREG, LASTREG
420
421This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
422`reserved_sgpr_first` and `reserved_sgpr_count` fields in kernel configuration.
423`reserved_sgpr_count` filled by number of registers (LASTREG-FIRSTREG+1).
424
425### .reserved_vgprs
426
427Syntax: .reserved_vgprs FIRSTREG, LASTREG
428
429This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
430`reserved_vgpr_first` and `reserved_vgpr_count` fields in kernel configuration.
431`reserved_vgpr_count` filled by number of registers (LASTREG-FIRSTREG+1).
432
433### .runtime_loader_kernel_symbol
434
435Syntax: .runtime_loader_kernel_symbol ADDRESS
436
437This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
438`runtime_loader_kernel_symbol` field in kernel configuration.
439
440### .rwdata
441
442Go to read-write global data section.
443
444### .sampler
445
446Syntax: .sampler VALUE,...
447
448Inside main and inner binary: add sampler definitions.
449Only legal when no samplerinit section. Inside kernel configuration:
450add samplers to kernel (values are sampler ids).
451
452### .samplerinit
453
454Go to samplerinit content section. Only legal if no sampler definitions.
455
456### .samplerreloc
457
458Syntax: .samplerreloc OFFSET, SAMPLERID
459
460Add sampler relocation that points to constant global data (rodata).
461
462### .scratchbuffer
463
464Syntax: .scratchbuffer SIZE
465
466This pseudo-operation must be inside any kernel configuration.
467Set scratchbuffer size.
468
469### .setup
470
471Go to kernel setup content section.
472
473### .setupargs
474
475This pseudo-op must be inside any kernel configuration. Add first kernel setup arguments.
476This pseudo-op must be before any other arguments.
477
478### .sgprsnum
479
480Syntax: .sgprsnum REGNUM
481
482This pseudo-op must be inside any kernel configuration. Set number of scalar
483registers which can be used during kernel execution. In old-config style,
484it counts SGPR registers excluding VCC, FLAT_SCRATCH and XNACK_MASK.
485In HSA-config style, it counts SGPR registers including VCC, FLAT_SCRATCH and XNACK_MASK
486(like ROCm).
487
488### .stub
489
490Go to kernel stub content section. Only allowed for older driver version binaries.
491
492### .tgsize
493
494This pseudo-op must be inside any kernel configuration.
495Enable usage of the TG_SIZE_EN.
496
497### .use_debug_enabled
498
499This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
500`is_debug_enabled` field in kernel configuration.
501
502### .use_dispatch_id
503
504This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
505`enable_sgpr_dispatch_id` field in kernel configuration.
506
507### .use_dispatch_ptr
508
509This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
510`enable_sgpr_dispatch_ptr` field in kernel configuration.
511
512### .use_dynamic_call_stack
513
514This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
515`is_dynamic_call_stack` field in kernel configuration.
516
517### .use_flat_scratch_init
518
519This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
520`enable_sgpr_flat_scratch_init` field in kernel configuration.
521
522### .use_grid_workgroup_count
523
524Syntax: .use_grid_workgroup_count DIMENSIONS
525
526This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
527`enable_sgpr_grid_workgroup_count_X`, `enable_sgpr_grid_workgroup_count_Y`
528and `enable_sgpr_grid_workgroup_count_Z` fields in kernel configuration,
529respectively by given dimensions.
530
531### .use_kernarg_segment_ptr
532
533This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
534`enable_sgpr_kernarg_segment_ptr` field in kernel configuration.
535
536### .use_ordered_append_gds
537
538This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
539`enable_ordered_append_gds` field in kernel configuration.
540
541### .use_private_segment_buffer
542
543This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
544`enable_sgpr_private_segment_buffer` field in kernel configuration.
545
546### .use_private_segment_size
547
548This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
549`enable_sgpr_private_segment_size` field in kernel configuration.
550
551### .use_ptr64
552
553This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
554Enable `is_ptr64` field in kernel configuration.
555
556### .use_queue_ptr
557
558This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
559`enable_sgpr_queue_ptr` field in kernel configuration.
560
561### .use_xnack_enabled
562
563This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Enable
564`is_xnack_enabled` field in kernel configuration.
565
566### .useargs
567
568This pseudo-op must be inside any kernel (non-HSA) configuration.
569Indicate that kernel uses arguments.
570
571### .useenqueue
572
573This pseudo-op must be inside any kernel (non-HSA) configuration.
574Indicate that kernel uses enqueue mechanism.
575
576### .usegeneric
577
578This pseudo-op must be inside any kernel (non-HSA) configuration.
579Indicate that kernel uses generic pointers mechanism (FLAT instructions).
580
581### .usesetup
582
583This pseudo-op must be inside any kernel (non-HSA) configuration.
584Indicate that kernel uses setup data (global sizes, local sizes, work groups num).
585
586### .userdatanum
587
588Syntax: .userdatanum NUMBER
589
590This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set number of
591registers for USERDATA.
592
593### .vectypehint
594
595Syntax: .vectypehint OPENCLTYPE
596
597This pseudo-operation must be inside any kernel configuration.
598Set vectypehint for kernel. The argument is OpenCL type.
599
600### .vgprsnum
601
602Syntax: .vgprsnum REGNUM
603
604This pseudo-op must be inside any kernel configuration. Set number of vector
605registers which can be used during kernel execution.
606
607### .wavefront_sgpr_count
608
609Syntax: .wavefront_sgpr_count REGNUM
610
611This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
612`wavefront_sgpr_count` field in kernel configuration.
613
614### .wavefront_size
615
616Syntax: .wavefront_size POWEROFTWO
617
618This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`).
619Set `wavefront_size` field in kernel configuration. Value must be a power of two.
620
621### .work_group_size_hint
622
623Syntax: .work_group_size_hint SIZEHINT[, SIZEHINT[, SIZEHINT]]
624
625This pseudo-operation must be inside any kernel configuration.
626Set work_group_size_hint for this kernel.
627
628### .workgroup_fbarrier_count
629
630Syntax: .workgroup_fbarrier_count COUNT
631
632This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
633`workgroup_fbarrier_count` field in kernel configuration.
634
635### .workgroup_group_segment_size
636
637Syntax: .workgroup_group_segment_size SIZE
638
639This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
640`workgroup_group_segment_byte_size` in kernel configuration.
641
642### .workitem_private_segment_size
643
644Syntax: .workitem_private_segment_size SIZE
645
646This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
647`workitem_private_segment_byte_size` field in kernel configuration.
648
649### .workitem_vgpr_count
650
651Syntax: .workitem_vgpr_count REGNUM
652
653This pseudo-op must be inside kernel HSA configuration (`.hsaconfig`). Set
654`workitem_vgpr_count` field in kernel configuration.
655
656## Sample code
657
658This is sample example of the kernel setup:
659
660```
661.amdcl2
662.64bit
663.gpu Bonaire
664.driver_version 191205
665.compile_options "-I ./ -cl-std=CL2.0"
666.acl_version "AMD-COMP-LIB-v0.8 (0.0.SC_BUILD_NUMBER)"
667.kernel DCT
668    .metadata
669        .byte 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
670        ...,
671    .setup
672        .byte 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00
673        .byte 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
674        ....
675    .text
676/*c0000501         */ s_load_dword    s0, s[4:5], 0x1
677....
678/*bf810000         */ s_endpgm
679```
680
681This is sample of the kernel with configuration:
682
683```
684.amdcl2
685.64bit
686.gpu Bonaire
687.driver_version 191205
688.compile_options "-I ./ -cl-std=CL2.0"
689.acl_version "AMD-COMP-LIB-v0.8 (0.0.SC_BUILD_NUMBER)"
690.kernel DCT
691    .config
692        .dims xy
693        .useargs
694        .usesetup
695        .setupargs
696        .arg output,float*
697        .arg input,float*
698        .arg dct8x8,float*
699        .arg dct8x8_trans,float*
700        .arg inter,float*,local
701        .arg width,uint
702        .arg blockWidth,uint
703        .arg inverse,uint
704        .......
705    .text
706/*c0000501         */ s_load_dword    s0, s[4:5], 0x1
707....
708/*bf810000         */ s_endpgm
709```
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