2 * Copyright © 2017 Connor Abbott
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "nir_serialize.h"
25 #include "nir_control_flow.h"
26 #include "util/u_dynarray.h"
27 #include "util/u_math.h"
29 #define NIR_SERIALIZE_FUNC_HAS_IMPL ((void *)(intptr_t)1)
30 #define MAX_OBJECT_IDS (1 << 20)
39 const nir_shader
*nir
;
43 /* maps pointer to index */
44 struct hash_table
*remap_table
;
46 /* the next index to assign to a NIR in-memory object */
49 /* Array of write_phi_fixup structs representing phi sources that need to
50 * be resolved in the second pass.
52 struct util_dynarray phi_fixups
;
54 /* The last serialized type. */
55 const struct glsl_type
*last_type
;
56 const struct glsl_type
*last_interface_type
;
57 struct nir_variable_data last_var_data
;
59 /* Don't write optional data such as variable names. */
66 struct blob_reader
*blob
;
68 /* the next index to assign to a NIR in-memory object */
71 /* The length of the index -> object table */
72 uint32_t idx_table_len
;
74 /* map from index to deserialized pointer */
77 /* List of phi sources. */
78 struct list_head phi_srcs
;
80 /* The last deserialized type. */
81 const struct glsl_type
*last_type
;
82 const struct glsl_type
*last_interface_type
;
83 struct nir_variable_data last_var_data
;
87 write_add_object(write_ctx
*ctx
, const void *obj
)
89 uint32_t index
= ctx
->next_idx
++;
90 assert(index
!= MAX_OBJECT_IDS
);
91 _mesa_hash_table_insert(ctx
->remap_table
, obj
, (void *)(uintptr_t) index
);
95 write_lookup_object(write_ctx
*ctx
, const void *obj
)
97 struct hash_entry
*entry
= _mesa_hash_table_search(ctx
->remap_table
, obj
);
99 return (uint32_t)(uintptr_t) entry
->data
;
103 write_object(write_ctx
*ctx
, const void *obj
)
105 blob_write_uint32(ctx
->blob
, write_lookup_object(ctx
, obj
));
109 read_add_object(read_ctx
*ctx
, void *obj
)
111 assert(ctx
->next_idx
< ctx
->idx_table_len
);
112 ctx
->idx_table
[ctx
->next_idx
++] = obj
;
116 read_lookup_object(read_ctx
*ctx
, uint32_t idx
)
118 assert(idx
< ctx
->idx_table_len
);
119 return ctx
->idx_table
[idx
];
123 read_object(read_ctx
*ctx
)
125 return read_lookup_object(ctx
, blob_read_uint32(ctx
->blob
));
129 encode_bit_size_3bits(uint8_t bit_size
)
131 /* Encode values of 0, 1, 2, 4, 8, 16, 32, 64 in 3 bits. */
132 assert(bit_size
<= 64 && util_is_power_of_two_or_zero(bit_size
));
134 return util_logbase2(bit_size
) + 1;
139 decode_bit_size_3bits(uint8_t bit_size
)
142 return 1 << (bit_size
- 1);
147 encode_num_components_in_3bits(uint8_t num_components
)
149 if (num_components
<= 4)
150 return num_components
;
151 if (num_components
== 8)
153 if (num_components
== 16)
156 unreachable("invalid number in num_components");
161 decode_num_components_in_3bits(uint8_t value
)
170 unreachable("invalid num_components encoding");
175 write_constant(write_ctx
*ctx
, const nir_constant
*c
)
177 blob_write_bytes(ctx
->blob
, c
->values
, sizeof(c
->values
));
178 blob_write_uint32(ctx
->blob
, c
->num_elements
);
179 for (unsigned i
= 0; i
< c
->num_elements
; i
++)
180 write_constant(ctx
, c
->elements
[i
]);
183 static nir_constant
*
184 read_constant(read_ctx
*ctx
, nir_variable
*nvar
)
186 nir_constant
*c
= ralloc(nvar
, nir_constant
);
188 blob_copy_bytes(ctx
->blob
, (uint8_t *)c
->values
, sizeof(c
->values
));
189 c
->num_elements
= blob_read_uint32(ctx
->blob
);
190 c
->elements
= ralloc_array(nvar
, nir_constant
*, c
->num_elements
);
191 for (unsigned i
= 0; i
< c
->num_elements
; i
++)
192 c
->elements
[i
] = read_constant(ctx
, nvar
);
197 enum var_data_encoding
{
199 var_encode_shader_temp
,
200 var_encode_function_temp
,
201 var_encode_location_diff
,
208 unsigned has_constant_initializer
:1;
209 unsigned has_interface_type
:1;
210 unsigned num_state_slots
:7;
211 unsigned data_encoding
:2;
212 unsigned type_same_as_last
:1;
213 unsigned interface_type_same_as_last
:1;
215 unsigned num_members
:16;
219 union packed_var_data_diff
{
224 int driver_location
:16;
229 write_variable(write_ctx
*ctx
, const nir_variable
*var
)
231 write_add_object(ctx
, var
);
233 assert(var
->num_state_slots
< (1 << 7));
234 assert(var
->num_members
< (1 << 16));
236 STATIC_ASSERT(sizeof(union packed_var
) == 4);
237 union packed_var flags
;
240 flags
.u
.has_name
= !ctx
->strip
&& var
->name
;
241 flags
.u
.has_constant_initializer
= !!(var
->constant_initializer
);
242 flags
.u
.has_interface_type
= !!(var
->interface_type
);
243 flags
.u
.type_same_as_last
= var
->type
== ctx
->last_type
;
244 flags
.u
.interface_type_same_as_last
=
245 var
->interface_type
&& var
->interface_type
== ctx
->last_interface_type
;
246 flags
.u
.num_state_slots
= var
->num_state_slots
;
247 flags
.u
.num_members
= var
->num_members
;
249 struct nir_variable_data data
= var
->data
;
251 /* When stripping, we expect that the location is no longer needed,
252 * which is typically after shaders are linked.
255 data
.mode
!= nir_var_shader_in
&&
256 data
.mode
!= nir_var_shader_out
)
259 /* Temporary variables don't serialize var->data. */
260 if (data
.mode
== nir_var_shader_temp
)
261 flags
.u
.data_encoding
= var_encode_shader_temp
;
262 else if (data
.mode
== nir_var_function_temp
)
263 flags
.u
.data_encoding
= var_encode_function_temp
;
265 struct nir_variable_data tmp
= data
;
267 tmp
.location
= ctx
->last_var_data
.location
;
268 tmp
.location_frac
= ctx
->last_var_data
.location_frac
;
269 tmp
.driver_location
= ctx
->last_var_data
.driver_location
;
271 /* See if we can encode only the difference in locations from the last
274 if (memcmp(&ctx
->last_var_data
, &tmp
, sizeof(tmp
)) == 0 &&
275 abs((int)data
.location
-
276 (int)ctx
->last_var_data
.location
) < (1 << 12) &&
277 abs((int)data
.driver_location
-
278 (int)ctx
->last_var_data
.driver_location
) < (1 << 15))
279 flags
.u
.data_encoding
= var_encode_location_diff
;
281 flags
.u
.data_encoding
= var_encode_full
;
284 blob_write_uint32(ctx
->blob
, flags
.u32
);
286 if (!flags
.u
.type_same_as_last
) {
287 encode_type_to_blob(ctx
->blob
, var
->type
);
288 ctx
->last_type
= var
->type
;
291 if (var
->interface_type
&& !flags
.u
.interface_type_same_as_last
) {
292 encode_type_to_blob(ctx
->blob
, var
->interface_type
);
293 ctx
->last_interface_type
= var
->interface_type
;
296 if (flags
.u
.has_name
)
297 blob_write_string(ctx
->blob
, var
->name
);
299 if (flags
.u
.data_encoding
== var_encode_full
||
300 flags
.u
.data_encoding
== var_encode_location_diff
) {
301 if (flags
.u
.data_encoding
== var_encode_full
) {
302 blob_write_bytes(ctx
->blob
, &data
, sizeof(data
));
304 /* Serialize only the difference in locations from the last variable.
306 union packed_var_data_diff diff
;
308 diff
.u
.location
= data
.location
- ctx
->last_var_data
.location
;
309 diff
.u
.location_frac
= data
.location_frac
-
310 ctx
->last_var_data
.location_frac
;
311 diff
.u
.driver_location
= data
.driver_location
-
312 ctx
->last_var_data
.driver_location
;
314 blob_write_uint32(ctx
->blob
, diff
.u32
);
317 ctx
->last_var_data
= data
;
320 for (unsigned i
= 0; i
< var
->num_state_slots
; i
++) {
321 blob_write_bytes(ctx
->blob
, &var
->state_slots
[i
],
322 sizeof(var
->state_slots
[i
]));
324 if (var
->constant_initializer
)
325 write_constant(ctx
, var
->constant_initializer
);
326 if (var
->num_members
> 0) {
327 blob_write_bytes(ctx
->blob
, (uint8_t *) var
->members
,
328 var
->num_members
* sizeof(*var
->members
));
332 static nir_variable
*
333 read_variable(read_ctx
*ctx
)
335 nir_variable
*var
= rzalloc(ctx
->nir
, nir_variable
);
336 read_add_object(ctx
, var
);
338 union packed_var flags
;
339 flags
.u32
= blob_read_uint32(ctx
->blob
);
341 if (flags
.u
.type_same_as_last
) {
342 var
->type
= ctx
->last_type
;
344 var
->type
= decode_type_from_blob(ctx
->blob
);
345 ctx
->last_type
= var
->type
;
348 if (flags
.u
.has_interface_type
) {
349 if (flags
.u
.interface_type_same_as_last
) {
350 var
->interface_type
= ctx
->last_interface_type
;
352 var
->interface_type
= decode_type_from_blob(ctx
->blob
);
353 ctx
->last_interface_type
= var
->interface_type
;
357 if (flags
.u
.has_name
) {
358 const char *name
= blob_read_string(ctx
->blob
);
359 var
->name
= ralloc_strdup(var
, name
);
364 if (flags
.u
.data_encoding
== var_encode_shader_temp
)
365 var
->data
.mode
= nir_var_shader_temp
;
366 else if (flags
.u
.data_encoding
== var_encode_function_temp
)
367 var
->data
.mode
= nir_var_function_temp
;
368 else if (flags
.u
.data_encoding
== var_encode_full
) {
369 blob_copy_bytes(ctx
->blob
, (uint8_t *) &var
->data
, sizeof(var
->data
));
370 ctx
->last_var_data
= var
->data
;
371 } else { /* var_encode_location_diff */
372 union packed_var_data_diff diff
;
373 diff
.u32
= blob_read_uint32(ctx
->blob
);
375 var
->data
= ctx
->last_var_data
;
376 var
->data
.location
+= diff
.u
.location
;
377 var
->data
.location_frac
+= diff
.u
.location_frac
;
378 var
->data
.driver_location
+= diff
.u
.driver_location
;
380 ctx
->last_var_data
= var
->data
;
383 var
->num_state_slots
= flags
.u
.num_state_slots
;
384 if (var
->num_state_slots
!= 0) {
385 var
->state_slots
= ralloc_array(var
, nir_state_slot
,
386 var
->num_state_slots
);
387 for (unsigned i
= 0; i
< var
->num_state_slots
; i
++) {
388 blob_copy_bytes(ctx
->blob
, &var
->state_slots
[i
],
389 sizeof(var
->state_slots
[i
]));
392 if (flags
.u
.has_constant_initializer
)
393 var
->constant_initializer
= read_constant(ctx
, var
);
395 var
->constant_initializer
= NULL
;
396 var
->num_members
= flags
.u
.num_members
;
397 if (var
->num_members
> 0) {
398 var
->members
= ralloc_array(var
, struct nir_variable_data
,
400 blob_copy_bytes(ctx
->blob
, (uint8_t *) var
->members
,
401 var
->num_members
* sizeof(*var
->members
));
408 write_var_list(write_ctx
*ctx
, const struct exec_list
*src
)
410 blob_write_uint32(ctx
->blob
, exec_list_length(src
));
411 foreach_list_typed(nir_variable
, var
, node
, src
) {
412 write_variable(ctx
, var
);
417 read_var_list(read_ctx
*ctx
, struct exec_list
*dst
)
419 exec_list_make_empty(dst
);
420 unsigned num_vars
= blob_read_uint32(ctx
->blob
);
421 for (unsigned i
= 0; i
< num_vars
; i
++) {
422 nir_variable
*var
= read_variable(ctx
);
423 exec_list_push_tail(dst
, &var
->node
);
428 write_register(write_ctx
*ctx
, const nir_register
*reg
)
430 write_add_object(ctx
, reg
);
431 blob_write_uint32(ctx
->blob
, reg
->num_components
);
432 blob_write_uint32(ctx
->blob
, reg
->bit_size
);
433 blob_write_uint32(ctx
->blob
, reg
->num_array_elems
);
434 blob_write_uint32(ctx
->blob
, reg
->index
);
435 blob_write_uint32(ctx
->blob
, !ctx
->strip
&& reg
->name
);
436 if (!ctx
->strip
&& reg
->name
)
437 blob_write_string(ctx
->blob
, reg
->name
);
440 static nir_register
*
441 read_register(read_ctx
*ctx
)
443 nir_register
*reg
= ralloc(ctx
->nir
, nir_register
);
444 read_add_object(ctx
, reg
);
445 reg
->num_components
= blob_read_uint32(ctx
->blob
);
446 reg
->bit_size
= blob_read_uint32(ctx
->blob
);
447 reg
->num_array_elems
= blob_read_uint32(ctx
->blob
);
448 reg
->index
= blob_read_uint32(ctx
->blob
);
449 bool has_name
= blob_read_uint32(ctx
->blob
);
451 const char *name
= blob_read_string(ctx
->blob
);
452 reg
->name
= ralloc_strdup(reg
, name
);
457 list_inithead(®
->uses
);
458 list_inithead(®
->defs
);
459 list_inithead(®
->if_uses
);
465 write_reg_list(write_ctx
*ctx
, const struct exec_list
*src
)
467 blob_write_uint32(ctx
->blob
, exec_list_length(src
));
468 foreach_list_typed(nir_register
, reg
, node
, src
)
469 write_register(ctx
, reg
);
473 read_reg_list(read_ctx
*ctx
, struct exec_list
*dst
)
475 exec_list_make_empty(dst
);
476 unsigned num_regs
= blob_read_uint32(ctx
->blob
);
477 for (unsigned i
= 0; i
< num_regs
; i
++) {
478 nir_register
*reg
= read_register(ctx
);
479 exec_list_push_tail(dst
, ®
->node
);
486 unsigned is_ssa
:1; /* <-- Header */
487 unsigned is_indirect
:1;
488 unsigned object_idx
:20;
489 unsigned _footer
:10; /* <-- Footer */
492 unsigned _header
:22; /* <-- Header */
493 unsigned negate
:1; /* <-- Footer */
495 unsigned swizzle_x
:2;
496 unsigned swizzle_y
:2;
497 unsigned swizzle_z
:2;
498 unsigned swizzle_w
:2;
501 unsigned _header
:22; /* <-- Header */
502 unsigned src_type
:5; /* <-- Footer */
508 write_src_full(write_ctx
*ctx
, const nir_src
*src
, union packed_src header
)
510 /* Since sources are very frequent, we try to save some space when storing
511 * them. In particular, we store whether the source is a register and
512 * whether the register has an indirect index in the low two bits. We can
513 * assume that the high two bits of the index are zero, since otherwise our
514 * address space would've been exhausted allocating the remap table!
516 header
.any
.is_ssa
= src
->is_ssa
;
518 header
.any
.object_idx
= write_lookup_object(ctx
, src
->ssa
);
519 blob_write_uint32(ctx
->blob
, header
.u32
);
521 header
.any
.object_idx
= write_lookup_object(ctx
, src
->reg
.reg
);
522 header
.any
.is_indirect
= !!src
->reg
.indirect
;
523 blob_write_uint32(ctx
->blob
, header
.u32
);
524 blob_write_uint32(ctx
->blob
, src
->reg
.base_offset
);
525 if (src
->reg
.indirect
) {
526 union packed_src header
= {0};
527 write_src_full(ctx
, src
->reg
.indirect
, header
);
533 write_src(write_ctx
*ctx
, const nir_src
*src
)
535 union packed_src header
= {0};
536 write_src_full(ctx
, src
, header
);
539 static union packed_src
540 read_src(read_ctx
*ctx
, nir_src
*src
, void *mem_ctx
)
542 STATIC_ASSERT(sizeof(union packed_src
) == 4);
543 union packed_src header
;
544 header
.u32
= blob_read_uint32(ctx
->blob
);
546 src
->is_ssa
= header
.any
.is_ssa
;
548 src
->ssa
= read_lookup_object(ctx
, header
.any
.object_idx
);
550 src
->reg
.reg
= read_lookup_object(ctx
, header
.any
.object_idx
);
551 src
->reg
.base_offset
= blob_read_uint32(ctx
->blob
);
552 if (header
.any
.is_indirect
) {
553 src
->reg
.indirect
= ralloc(mem_ctx
, nir_src
);
554 read_src(ctx
, src
->reg
.indirect
, mem_ctx
);
556 src
->reg
.indirect
= NULL
;
567 uint8_t num_components
:3;
572 uint8_t is_indirect
:1;
577 enum intrinsic_const_indices_encoding
{
578 /* Use the 6 bits of packed_const_indices to store 1-6 indices.
579 * 1 6-bit index, or 2 3-bit indices, or 3 2-bit indices, or
582 * The common case for load_ubo is 0, 0, 0, which is trivially represented.
583 * The common cases for load_interpolated_input also fit here, e.g.: 7, 3
585 const_indices_6bit_all_combined
,
587 const_indices_8bit
, /* 8 bits per element */
588 const_indices_16bit
, /* 16 bits per element */
589 const_indices_32bit
, /* 32 bits per element */
592 enum load_const_packing
{
593 /* Constants are not packed and are stored in following dwords. */
596 /* packed_value contains high 19 bits, low bits are 0,
597 * good for floating-point decimals
599 load_const_scalar_hi_19bits
,
601 /* packed_value contains low 19 bits, high bits are sign-extended */
602 load_const_scalar_lo_19bits_sext
,
608 unsigned instr_type
:4; /* always present */
610 unsigned dest
:8; /* always last */
613 unsigned instr_type
:4;
615 unsigned no_signed_wrap
:1;
616 unsigned no_unsigned_wrap
:1;
618 unsigned writemask
:4;
620 unsigned packed_src_ssa_16bit
:1;
625 unsigned instr_type
:4;
626 unsigned deref_type
:3;
632 unsigned instr_type
:4;
633 unsigned intrinsic
:9;
634 unsigned num_components
:3;
635 unsigned const_indices_encoding
:2;
636 unsigned packed_const_indices
:6;
640 unsigned instr_type
:4;
641 unsigned last_component
:4;
643 unsigned packing
:2; /* enum load_const_packing */
644 unsigned packed_value
:19; /* meaning determined by packing */
647 unsigned instr_type
:4;
648 unsigned last_component
:4;
653 unsigned instr_type
:4;
656 unsigned texture_array_size
:12;
660 unsigned instr_type
:4;
661 unsigned num_srcs
:20;
665 unsigned instr_type
:4;
671 /* Write "lo24" as low 24 bits in the first uint32. */
673 write_dest(write_ctx
*ctx
, const nir_dest
*dst
, union packed_instr header
)
675 STATIC_ASSERT(sizeof(union packed_dest
) == 1);
676 union packed_dest dest
;
679 dest
.ssa
.is_ssa
= dst
->is_ssa
;
681 dest
.ssa
.has_name
= !ctx
->strip
&& dst
->ssa
.name
;
682 dest
.ssa
.num_components
=
683 encode_num_components_in_3bits(dst
->ssa
.num_components
);
684 dest
.ssa
.bit_size
= encode_bit_size_3bits(dst
->ssa
.bit_size
);
686 dest
.reg
.is_indirect
= !!(dst
->reg
.indirect
);
689 header
.any
.dest
= dest
.u8
;
690 blob_write_uint32(ctx
->blob
, header
.u32
);
693 write_add_object(ctx
, &dst
->ssa
);
694 if (dest
.ssa
.has_name
)
695 blob_write_string(ctx
->blob
, dst
->ssa
.name
);
697 blob_write_uint32(ctx
->blob
, write_lookup_object(ctx
, dst
->reg
.reg
));
698 blob_write_uint32(ctx
->blob
, dst
->reg
.base_offset
);
699 if (dst
->reg
.indirect
)
700 write_src(ctx
, dst
->reg
.indirect
);
705 read_dest(read_ctx
*ctx
, nir_dest
*dst
, nir_instr
*instr
,
706 union packed_instr header
)
708 union packed_dest dest
;
709 dest
.u8
= header
.any
.dest
;
711 if (dest
.ssa
.is_ssa
) {
712 unsigned bit_size
= decode_bit_size_3bits(dest
.ssa
.bit_size
);
713 unsigned num_components
=
714 decode_num_components_in_3bits(dest
.ssa
.num_components
);
715 char *name
= dest
.ssa
.has_name
? blob_read_string(ctx
->blob
) : NULL
;
716 nir_ssa_dest_init(instr
, dst
, num_components
, bit_size
, name
);
717 read_add_object(ctx
, &dst
->ssa
);
719 dst
->reg
.reg
= read_object(ctx
);
720 dst
->reg
.base_offset
= blob_read_uint32(ctx
->blob
);
721 if (dest
.reg
.is_indirect
) {
722 dst
->reg
.indirect
= ralloc(instr
, nir_src
);
723 read_src(ctx
, dst
->reg
.indirect
, instr
);
729 are_object_ids_16bit(write_ctx
*ctx
)
731 /* Check the highest object ID, because they are monotonic. */
732 return ctx
->next_idx
< (1 << 16);
736 is_alu_src_ssa_16bit(write_ctx
*ctx
, const nir_alu_instr
*alu
)
738 unsigned num_srcs
= nir_op_infos
[alu
->op
].num_inputs
;
740 for (unsigned i
= 0; i
< num_srcs
; i
++) {
741 if (!alu
->src
[i
].src
.is_ssa
|| alu
->src
[i
].abs
|| alu
->src
[i
].negate
)
744 unsigned src_components
= nir_ssa_alu_instr_src_components(alu
, i
);
746 for (unsigned chan
= 0; chan
< src_components
; chan
++) {
747 if (alu
->src
[i
].swizzle
[chan
] != chan
)
752 return are_object_ids_16bit(ctx
);
756 write_alu(write_ctx
*ctx
, const nir_alu_instr
*alu
)
758 unsigned num_srcs
= nir_op_infos
[alu
->op
].num_inputs
;
759 /* 9 bits for nir_op */
760 STATIC_ASSERT(nir_num_opcodes
<= 512);
761 union packed_instr header
;
764 header
.alu
.instr_type
= alu
->instr
.type
;
765 header
.alu
.exact
= alu
->exact
;
766 header
.alu
.no_signed_wrap
= alu
->no_signed_wrap
;
767 header
.alu
.no_unsigned_wrap
= alu
->no_unsigned_wrap
;
768 header
.alu
.saturate
= alu
->dest
.saturate
;
769 header
.alu
.writemask
= alu
->dest
.write_mask
;
770 header
.alu
.op
= alu
->op
;
771 header
.alu
.packed_src_ssa_16bit
= is_alu_src_ssa_16bit(ctx
, alu
);
773 write_dest(ctx
, &alu
->dest
.dest
, header
);
775 if (header
.alu
.packed_src_ssa_16bit
) {
776 for (unsigned i
= 0; i
< num_srcs
; i
++) {
777 assert(alu
->src
[i
].src
.is_ssa
);
778 unsigned idx
= write_lookup_object(ctx
, alu
->src
[i
].src
.ssa
);
779 assert(idx
< (1 << 16));
780 blob_write_uint16(ctx
->blob
, idx
);
783 for (unsigned i
= 0; i
< num_srcs
; i
++) {
784 union packed_src src
;
787 src
.alu
.negate
= alu
->src
[i
].negate
;
788 src
.alu
.abs
= alu
->src
[i
].abs
;
789 src
.alu
.swizzle_x
= alu
->src
[i
].swizzle
[0];
790 src
.alu
.swizzle_y
= alu
->src
[i
].swizzle
[1];
791 src
.alu
.swizzle_z
= alu
->src
[i
].swizzle
[2];
792 src
.alu
.swizzle_w
= alu
->src
[i
].swizzle
[3];
794 write_src_full(ctx
, &alu
->src
[i
].src
, src
);
799 static nir_alu_instr
*
800 read_alu(read_ctx
*ctx
, union packed_instr header
)
802 unsigned num_srcs
= nir_op_infos
[header
.alu
.op
].num_inputs
;
803 nir_alu_instr
*alu
= nir_alu_instr_create(ctx
->nir
, header
.alu
.op
);
805 alu
->exact
= header
.alu
.exact
;
806 alu
->no_signed_wrap
= header
.alu
.no_signed_wrap
;
807 alu
->no_unsigned_wrap
= header
.alu
.no_unsigned_wrap
;
808 alu
->dest
.saturate
= header
.alu
.saturate
;
809 alu
->dest
.write_mask
= header
.alu
.writemask
;
811 read_dest(ctx
, &alu
->dest
.dest
, &alu
->instr
, header
);
813 if (header
.alu
.packed_src_ssa_16bit
) {
814 for (unsigned i
= 0; i
< num_srcs
; i
++) {
815 nir_alu_src
*src
= &alu
->src
[i
];
816 src
->src
.is_ssa
= true;
817 src
->src
.ssa
= read_lookup_object(ctx
, blob_read_uint16(ctx
->blob
));
819 memset(&src
->swizzle
, 0, sizeof(src
->swizzle
));
821 unsigned src_components
= nir_ssa_alu_instr_src_components(alu
, i
);
823 for (unsigned chan
= 0; chan
< src_components
; chan
++)
824 src
->swizzle
[chan
] = chan
;
827 for (unsigned i
= 0; i
< num_srcs
; i
++) {
828 union packed_src src
= read_src(ctx
, &alu
->src
[i
].src
, &alu
->instr
);
830 alu
->src
[i
].negate
= src
.alu
.negate
;
831 alu
->src
[i
].abs
= src
.alu
.abs
;
832 alu
->src
[i
].swizzle
[0] = src
.alu
.swizzle_x
;
833 alu
->src
[i
].swizzle
[1] = src
.alu
.swizzle_y
;
834 alu
->src
[i
].swizzle
[2] = src
.alu
.swizzle_z
;
835 alu
->src
[i
].swizzle
[3] = src
.alu
.swizzle_w
;
843 write_deref(write_ctx
*ctx
, const nir_deref_instr
*deref
)
845 assert(deref
->deref_type
< 8);
846 assert(deref
->mode
< (1 << 10));
848 union packed_instr header
;
851 header
.deref
.instr_type
= deref
->instr
.type
;
852 header
.deref
.deref_type
= deref
->deref_type
;
853 header
.deref
.mode
= deref
->mode
;
855 write_dest(ctx
, &deref
->dest
, header
);
856 encode_type_to_blob(ctx
->blob
, deref
->type
);
858 if (deref
->deref_type
== nir_deref_type_var
) {
859 write_object(ctx
, deref
->var
);
863 write_src(ctx
, &deref
->parent
);
865 switch (deref
->deref_type
) {
866 case nir_deref_type_struct
:
867 blob_write_uint32(ctx
->blob
, deref
->strct
.index
);
870 case nir_deref_type_array
:
871 case nir_deref_type_ptr_as_array
:
872 write_src(ctx
, &deref
->arr
.index
);
875 case nir_deref_type_cast
:
876 blob_write_uint32(ctx
->blob
, deref
->cast
.ptr_stride
);
879 case nir_deref_type_array_wildcard
:
884 unreachable("Invalid deref type");
888 static nir_deref_instr
*
889 read_deref(read_ctx
*ctx
, union packed_instr header
)
891 nir_deref_type deref_type
= header
.deref
.deref_type
;
892 nir_deref_instr
*deref
= nir_deref_instr_create(ctx
->nir
, deref_type
);
894 read_dest(ctx
, &deref
->dest
, &deref
->instr
, header
);
896 deref
->mode
= header
.deref
.mode
;
897 deref
->type
= decode_type_from_blob(ctx
->blob
);
899 if (deref_type
== nir_deref_type_var
) {
900 deref
->var
= read_object(ctx
);
904 read_src(ctx
, &deref
->parent
, &deref
->instr
);
906 switch (deref
->deref_type
) {
907 case nir_deref_type_struct
:
908 deref
->strct
.index
= blob_read_uint32(ctx
->blob
);
911 case nir_deref_type_array
:
912 case nir_deref_type_ptr_as_array
:
913 read_src(ctx
, &deref
->arr
.index
, &deref
->instr
);
916 case nir_deref_type_cast
:
917 deref
->cast
.ptr_stride
= blob_read_uint32(ctx
->blob
);
920 case nir_deref_type_array_wildcard
:
925 unreachable("Invalid deref type");
932 write_intrinsic(write_ctx
*ctx
, const nir_intrinsic_instr
*intrin
)
934 /* 9 bits for nir_intrinsic_op */
935 STATIC_ASSERT(nir_num_intrinsics
<= 512);
936 unsigned num_srcs
= nir_intrinsic_infos
[intrin
->intrinsic
].num_srcs
;
937 unsigned num_indices
= nir_intrinsic_infos
[intrin
->intrinsic
].num_indices
;
938 assert(intrin
->intrinsic
< 512);
940 union packed_instr header
;
943 header
.intrinsic
.instr_type
= intrin
->instr
.type
;
944 header
.intrinsic
.intrinsic
= intrin
->intrinsic
;
945 header
.intrinsic
.num_components
=
946 encode_num_components_in_3bits(intrin
->num_components
);
948 /* Analyze constant indices to decide how to encode them. */
950 unsigned max_bits
= 0;
951 for (unsigned i
= 0; i
< num_indices
; i
++) {
952 unsigned max
= util_last_bit(intrin
->const_index
[i
]);
953 max_bits
= MAX2(max_bits
, max
);
956 if (max_bits
* num_indices
<= 6) {
957 header
.intrinsic
.const_indices_encoding
= const_indices_6bit_all_combined
;
959 /* Pack all const indices into 6 bits. */
960 unsigned bit_size
= 6 / num_indices
;
961 for (unsigned i
= 0; i
< num_indices
; i
++) {
962 header
.intrinsic
.packed_const_indices
|=
963 intrin
->const_index
[i
] << (i
* bit_size
);
965 } else if (max_bits
<= 8)
966 header
.intrinsic
.const_indices_encoding
= const_indices_8bit
;
967 else if (max_bits
<= 16)
968 header
.intrinsic
.const_indices_encoding
= const_indices_16bit
;
970 header
.intrinsic
.const_indices_encoding
= const_indices_32bit
;
973 if (nir_intrinsic_infos
[intrin
->intrinsic
].has_dest
)
974 write_dest(ctx
, &intrin
->dest
, header
);
976 blob_write_uint32(ctx
->blob
, header
.u32
);
978 for (unsigned i
= 0; i
< num_srcs
; i
++)
979 write_src(ctx
, &intrin
->src
[i
]);
982 switch (header
.intrinsic
.const_indices_encoding
) {
983 case const_indices_8bit
:
984 for (unsigned i
= 0; i
< num_indices
; i
++)
985 blob_write_uint8(ctx
->blob
, intrin
->const_index
[i
]);
987 case const_indices_16bit
:
988 for (unsigned i
= 0; i
< num_indices
; i
++)
989 blob_write_uint16(ctx
->blob
, intrin
->const_index
[i
]);
991 case const_indices_32bit
:
992 for (unsigned i
= 0; i
< num_indices
; i
++)
993 blob_write_uint32(ctx
->blob
, intrin
->const_index
[i
]);
999 static nir_intrinsic_instr
*
1000 read_intrinsic(read_ctx
*ctx
, union packed_instr header
)
1002 nir_intrinsic_op op
= header
.intrinsic
.intrinsic
;
1003 nir_intrinsic_instr
*intrin
= nir_intrinsic_instr_create(ctx
->nir
, op
);
1005 unsigned num_srcs
= nir_intrinsic_infos
[op
].num_srcs
;
1006 unsigned num_indices
= nir_intrinsic_infos
[op
].num_indices
;
1008 intrin
->num_components
=
1009 decode_num_components_in_3bits(header
.intrinsic
.num_components
);
1011 if (nir_intrinsic_infos
[op
].has_dest
)
1012 read_dest(ctx
, &intrin
->dest
, &intrin
->instr
, header
);
1014 for (unsigned i
= 0; i
< num_srcs
; i
++)
1015 read_src(ctx
, &intrin
->src
[i
], &intrin
->instr
);
1018 switch (header
.intrinsic
.const_indices_encoding
) {
1019 case const_indices_6bit_all_combined
: {
1020 unsigned bit_size
= 6 / num_indices
;
1021 unsigned bit_mask
= u_bit_consecutive(0, bit_size
);
1022 for (unsigned i
= 0; i
< num_indices
; i
++) {
1023 intrin
->const_index
[i
] =
1024 (header
.intrinsic
.packed_const_indices
>> (i
* bit_size
)) &
1029 case const_indices_8bit
:
1030 for (unsigned i
= 0; i
< num_indices
; i
++)
1031 intrin
->const_index
[i
] = blob_read_uint8(ctx
->blob
);
1033 case const_indices_16bit
:
1034 for (unsigned i
= 0; i
< num_indices
; i
++)
1035 intrin
->const_index
[i
] = blob_read_uint16(ctx
->blob
);
1037 case const_indices_32bit
:
1038 for (unsigned i
= 0; i
< num_indices
; i
++)
1039 intrin
->const_index
[i
] = blob_read_uint32(ctx
->blob
);
1048 write_load_const(write_ctx
*ctx
, const nir_load_const_instr
*lc
)
1050 assert(lc
->def
.num_components
>= 1 && lc
->def
.num_components
<= 16);
1051 union packed_instr header
;
1054 header
.load_const
.instr_type
= lc
->instr
.type
;
1055 header
.load_const
.last_component
= lc
->def
.num_components
- 1;
1056 header
.load_const
.bit_size
= encode_bit_size_3bits(lc
->def
.bit_size
);
1057 header
.load_const
.packing
= load_const_full
;
1059 /* Try to pack 1-component constants into the 19 free bits in the header. */
1060 if (lc
->def
.num_components
== 1) {
1061 switch (lc
->def
.bit_size
) {
1063 if ((lc
->value
[0].u64
& 0x1fffffffffffull
) == 0) {
1064 /* packed_value contains high 19 bits, low bits are 0 */
1065 header
.load_const
.packing
= load_const_scalar_hi_19bits
;
1066 header
.load_const
.packed_value
= lc
->value
[0].u64
>> 45;
1067 } else if (((lc
->value
[0].i64
<< 45) >> 45) == lc
->value
[0].i64
) {
1068 /* packed_value contains low 19 bits, high bits are sign-extended */
1069 header
.load_const
.packing
= load_const_scalar_lo_19bits_sext
;
1070 header
.load_const
.packed_value
= lc
->value
[0].u64
;
1075 if ((lc
->value
[0].u32
& 0x1fff) == 0) {
1076 header
.load_const
.packing
= load_const_scalar_hi_19bits
;
1077 header
.load_const
.packed_value
= lc
->value
[0].u32
>> 13;
1078 } else if (((lc
->value
[0].i32
<< 13) >> 13) == lc
->value
[0].i32
) {
1079 header
.load_const
.packing
= load_const_scalar_lo_19bits_sext
;
1080 header
.load_const
.packed_value
= lc
->value
[0].u32
;
1085 header
.load_const
.packing
= load_const_scalar_lo_19bits_sext
;
1086 header
.load_const
.packed_value
= lc
->value
[0].u16
;
1089 header
.load_const
.packing
= load_const_scalar_lo_19bits_sext
;
1090 header
.load_const
.packed_value
= lc
->value
[0].u8
;
1093 header
.load_const
.packing
= load_const_scalar_lo_19bits_sext
;
1094 header
.load_const
.packed_value
= lc
->value
[0].b
;
1097 unreachable("invalid bit_size");
1101 blob_write_uint32(ctx
->blob
, header
.u32
);
1103 if (header
.load_const
.packing
== load_const_full
) {
1104 switch (lc
->def
.bit_size
) {
1106 blob_write_bytes(ctx
->blob
, lc
->value
,
1107 sizeof(*lc
->value
) * lc
->def
.num_components
);
1111 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1112 blob_write_uint32(ctx
->blob
, lc
->value
[i
].u32
);
1116 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1117 blob_write_uint16(ctx
->blob
, lc
->value
[i
].u16
);
1121 assert(lc
->def
.bit_size
<= 8);
1122 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1123 blob_write_uint8(ctx
->blob
, lc
->value
[i
].u8
);
1128 write_add_object(ctx
, &lc
->def
);
1131 static nir_load_const_instr
*
1132 read_load_const(read_ctx
*ctx
, union packed_instr header
)
1134 nir_load_const_instr
*lc
=
1135 nir_load_const_instr_create(ctx
->nir
, header
.load_const
.last_component
+ 1,
1136 decode_bit_size_3bits(header
.load_const
.bit_size
));
1138 switch (header
.load_const
.packing
) {
1139 case load_const_scalar_hi_19bits
:
1140 switch (lc
->def
.bit_size
) {
1142 lc
->value
[0].u64
= (uint64_t)header
.load_const
.packed_value
<< 45;
1145 lc
->value
[0].u32
= (uint64_t)header
.load_const
.packed_value
<< 13;
1148 unreachable("invalid bit_size");
1152 case load_const_scalar_lo_19bits_sext
:
1153 switch (lc
->def
.bit_size
) {
1155 lc
->value
[0].i64
= ((int64_t)header
.load_const
.packed_value
<< 45) >> 45;
1158 lc
->value
[0].i32
= ((int32_t)header
.load_const
.packed_value
<< 13) >> 13;
1161 lc
->value
[0].u16
= header
.load_const
.packed_value
;
1164 lc
->value
[0].u8
= header
.load_const
.packed_value
;
1167 lc
->value
[0].b
= header
.load_const
.packed_value
;
1170 unreachable("invalid bit_size");
1174 case load_const_full
:
1175 switch (lc
->def
.bit_size
) {
1177 blob_copy_bytes(ctx
->blob
, lc
->value
, sizeof(*lc
->value
) * lc
->def
.num_components
);
1181 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1182 lc
->value
[i
].u32
= blob_read_uint32(ctx
->blob
);
1186 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1187 lc
->value
[i
].u16
= blob_read_uint16(ctx
->blob
);
1191 assert(lc
->def
.bit_size
<= 8);
1192 for (unsigned i
= 0; i
< lc
->def
.num_components
; i
++)
1193 lc
->value
[i
].u8
= blob_read_uint8(ctx
->blob
);
1199 read_add_object(ctx
, &lc
->def
);
1204 write_ssa_undef(write_ctx
*ctx
, const nir_ssa_undef_instr
*undef
)
1206 assert(undef
->def
.num_components
>= 1 && undef
->def
.num_components
<= 16);
1208 union packed_instr header
;
1211 header
.undef
.instr_type
= undef
->instr
.type
;
1212 header
.undef
.last_component
= undef
->def
.num_components
- 1;
1213 header
.undef
.bit_size
= encode_bit_size_3bits(undef
->def
.bit_size
);
1215 blob_write_uint32(ctx
->blob
, header
.u32
);
1216 write_add_object(ctx
, &undef
->def
);
1219 static nir_ssa_undef_instr
*
1220 read_ssa_undef(read_ctx
*ctx
, union packed_instr header
)
1222 nir_ssa_undef_instr
*undef
=
1223 nir_ssa_undef_instr_create(ctx
->nir
, header
.undef
.last_component
+ 1,
1224 decode_bit_size_3bits(header
.undef
.bit_size
));
1226 read_add_object(ctx
, &undef
->def
);
1230 union packed_tex_data
{
1233 enum glsl_sampler_dim sampler_dim
:4;
1234 nir_alu_type dest_type
:8;
1235 unsigned coord_components
:3;
1236 unsigned is_array
:1;
1237 unsigned is_shadow
:1;
1238 unsigned is_new_style_shadow
:1;
1239 unsigned component
:2;
1240 unsigned unused
:10; /* Mark unused for valgrind. */
1245 write_tex(write_ctx
*ctx
, const nir_tex_instr
*tex
)
1247 assert(tex
->num_srcs
< 16);
1248 assert(tex
->op
< 16);
1249 assert(tex
->texture_array_size
< 1024);
1251 union packed_instr header
;
1254 header
.tex
.instr_type
= tex
->instr
.type
;
1255 header
.tex
.num_srcs
= tex
->num_srcs
;
1256 header
.tex
.op
= tex
->op
;
1257 header
.tex
.texture_array_size
= tex
->texture_array_size
;
1259 write_dest(ctx
, &tex
->dest
, header
);
1261 blob_write_uint32(ctx
->blob
, tex
->texture_index
);
1262 blob_write_uint32(ctx
->blob
, tex
->sampler_index
);
1263 if (tex
->op
== nir_texop_tg4
)
1264 blob_write_bytes(ctx
->blob
, tex
->tg4_offsets
, sizeof(tex
->tg4_offsets
));
1266 STATIC_ASSERT(sizeof(union packed_tex_data
) == sizeof(uint32_t));
1267 union packed_tex_data packed
= {
1268 .u
.sampler_dim
= tex
->sampler_dim
,
1269 .u
.dest_type
= tex
->dest_type
,
1270 .u
.coord_components
= tex
->coord_components
,
1271 .u
.is_array
= tex
->is_array
,
1272 .u
.is_shadow
= tex
->is_shadow
,
1273 .u
.is_new_style_shadow
= tex
->is_new_style_shadow
,
1274 .u
.component
= tex
->component
,
1276 blob_write_uint32(ctx
->blob
, packed
.u32
);
1278 for (unsigned i
= 0; i
< tex
->num_srcs
; i
++) {
1279 union packed_src src
;
1281 src
.tex
.src_type
= tex
->src
[i
].src_type
;
1282 write_src_full(ctx
, &tex
->src
[i
].src
, src
);
1286 static nir_tex_instr
*
1287 read_tex(read_ctx
*ctx
, union packed_instr header
)
1289 nir_tex_instr
*tex
= nir_tex_instr_create(ctx
->nir
, header
.tex
.num_srcs
);
1291 read_dest(ctx
, &tex
->dest
, &tex
->instr
, header
);
1293 tex
->op
= header
.tex
.op
;
1294 tex
->texture_index
= blob_read_uint32(ctx
->blob
);
1295 tex
->texture_array_size
= header
.tex
.texture_array_size
;
1296 tex
->sampler_index
= blob_read_uint32(ctx
->blob
);
1297 if (tex
->op
== nir_texop_tg4
)
1298 blob_copy_bytes(ctx
->blob
, tex
->tg4_offsets
, sizeof(tex
->tg4_offsets
));
1300 union packed_tex_data packed
;
1301 packed
.u32
= blob_read_uint32(ctx
->blob
);
1302 tex
->sampler_dim
= packed
.u
.sampler_dim
;
1303 tex
->dest_type
= packed
.u
.dest_type
;
1304 tex
->coord_components
= packed
.u
.coord_components
;
1305 tex
->is_array
= packed
.u
.is_array
;
1306 tex
->is_shadow
= packed
.u
.is_shadow
;
1307 tex
->is_new_style_shadow
= packed
.u
.is_new_style_shadow
;
1308 tex
->component
= packed
.u
.component
;
1310 for (unsigned i
= 0; i
< tex
->num_srcs
; i
++) {
1311 union packed_src src
= read_src(ctx
, &tex
->src
[i
].src
, &tex
->instr
);
1312 tex
->src
[i
].src_type
= src
.tex
.src_type
;
1319 write_phi(write_ctx
*ctx
, const nir_phi_instr
*phi
)
1321 union packed_instr header
;
1324 header
.phi
.instr_type
= phi
->instr
.type
;
1325 header
.phi
.num_srcs
= exec_list_length(&phi
->srcs
);
1327 /* Phi nodes are special, since they may reference SSA definitions and
1328 * basic blocks that don't exist yet. We leave two empty uint32_t's here,
1329 * and then store enough information so that a later fixup pass can fill
1330 * them in correctly.
1332 write_dest(ctx
, &phi
->dest
, header
);
1334 nir_foreach_phi_src(src
, phi
) {
1335 assert(src
->src
.is_ssa
);
1336 size_t blob_offset
= blob_reserve_uint32(ctx
->blob
);
1337 ASSERTED
size_t blob_offset2
= blob_reserve_uint32(ctx
->blob
);
1338 assert(blob_offset
+ sizeof(uint32_t) == blob_offset2
);
1339 write_phi_fixup fixup
= {
1340 .blob_offset
= blob_offset
,
1341 .src
= src
->src
.ssa
,
1344 util_dynarray_append(&ctx
->phi_fixups
, write_phi_fixup
, fixup
);
1349 write_fixup_phis(write_ctx
*ctx
)
1351 util_dynarray_foreach(&ctx
->phi_fixups
, write_phi_fixup
, fixup
) {
1352 uint32_t *blob_ptr
= (uint32_t *)(ctx
->blob
->data
+ fixup
->blob_offset
);
1353 blob_ptr
[0] = write_lookup_object(ctx
, fixup
->src
);
1354 blob_ptr
[1] = write_lookup_object(ctx
, fixup
->block
);
1357 util_dynarray_clear(&ctx
->phi_fixups
);
1360 static nir_phi_instr
*
1361 read_phi(read_ctx
*ctx
, nir_block
*blk
, union packed_instr header
)
1363 nir_phi_instr
*phi
= nir_phi_instr_create(ctx
->nir
);
1365 read_dest(ctx
, &phi
->dest
, &phi
->instr
, header
);
1367 /* For similar reasons as before, we just store the index directly into the
1368 * pointer, and let a later pass resolve the phi sources.
1370 * In order to ensure that the copied sources (which are just the indices
1371 * from the blob for now) don't get inserted into the old shader's use-def
1372 * lists, we have to add the phi instruction *before* we set up its
1375 nir_instr_insert_after_block(blk
, &phi
->instr
);
1377 for (unsigned i
= 0; i
< header
.phi
.num_srcs
; i
++) {
1378 nir_phi_src
*src
= ralloc(phi
, nir_phi_src
);
1380 src
->src
.is_ssa
= true;
1381 src
->src
.ssa
= (nir_ssa_def
*)(uintptr_t) blob_read_uint32(ctx
->blob
);
1382 src
->pred
= (nir_block
*)(uintptr_t) blob_read_uint32(ctx
->blob
);
1384 /* Since we're not letting nir_insert_instr handle use/def stuff for us,
1385 * we have to set the parent_instr manually. It doesn't really matter
1386 * when we do it, so we might as well do it here.
1388 src
->src
.parent_instr
= &phi
->instr
;
1390 /* Stash it in the list of phi sources. We'll walk this list and fix up
1391 * sources at the very end of read_function_impl.
1393 list_add(&src
->src
.use_link
, &ctx
->phi_srcs
);
1395 exec_list_push_tail(&phi
->srcs
, &src
->node
);
1402 read_fixup_phis(read_ctx
*ctx
)
1404 list_for_each_entry_safe(nir_phi_src
, src
, &ctx
->phi_srcs
, src
.use_link
) {
1405 src
->pred
= read_lookup_object(ctx
, (uintptr_t)src
->pred
);
1406 src
->src
.ssa
= read_lookup_object(ctx
, (uintptr_t)src
->src
.ssa
);
1408 /* Remove from this list */
1409 list_del(&src
->src
.use_link
);
1411 list_addtail(&src
->src
.use_link
, &src
->src
.ssa
->uses
);
1413 assert(list_is_empty(&ctx
->phi_srcs
));
1417 write_jump(write_ctx
*ctx
, const nir_jump_instr
*jmp
)
1419 assert(jmp
->type
< 4);
1421 union packed_instr header
;
1424 header
.jump
.instr_type
= jmp
->instr
.type
;
1425 header
.jump
.type
= jmp
->type
;
1427 blob_write_uint32(ctx
->blob
, header
.u32
);
1430 static nir_jump_instr
*
1431 read_jump(read_ctx
*ctx
, union packed_instr header
)
1433 nir_jump_instr
*jmp
= nir_jump_instr_create(ctx
->nir
, header
.jump
.type
);
1438 write_call(write_ctx
*ctx
, const nir_call_instr
*call
)
1440 blob_write_uint32(ctx
->blob
, write_lookup_object(ctx
, call
->callee
));
1442 for (unsigned i
= 0; i
< call
->num_params
; i
++)
1443 write_src(ctx
, &call
->params
[i
]);
1446 static nir_call_instr
*
1447 read_call(read_ctx
*ctx
)
1449 nir_function
*callee
= read_object(ctx
);
1450 nir_call_instr
*call
= nir_call_instr_create(ctx
->nir
, callee
);
1452 for (unsigned i
= 0; i
< call
->num_params
; i
++)
1453 read_src(ctx
, &call
->params
[i
], call
);
1459 write_instr(write_ctx
*ctx
, const nir_instr
*instr
)
1461 /* We have only 4 bits for the instruction type. */
1462 assert(instr
->type
< 16);
1464 switch (instr
->type
) {
1465 case nir_instr_type_alu
:
1466 write_alu(ctx
, nir_instr_as_alu(instr
));
1468 case nir_instr_type_deref
:
1469 write_deref(ctx
, nir_instr_as_deref(instr
));
1471 case nir_instr_type_intrinsic
:
1472 write_intrinsic(ctx
, nir_instr_as_intrinsic(instr
));
1474 case nir_instr_type_load_const
:
1475 write_load_const(ctx
, nir_instr_as_load_const(instr
));
1477 case nir_instr_type_ssa_undef
:
1478 write_ssa_undef(ctx
, nir_instr_as_ssa_undef(instr
));
1480 case nir_instr_type_tex
:
1481 write_tex(ctx
, nir_instr_as_tex(instr
));
1483 case nir_instr_type_phi
:
1484 write_phi(ctx
, nir_instr_as_phi(instr
));
1486 case nir_instr_type_jump
:
1487 write_jump(ctx
, nir_instr_as_jump(instr
));
1489 case nir_instr_type_call
:
1490 blob_write_uint32(ctx
->blob
, instr
->type
);
1491 write_call(ctx
, nir_instr_as_call(instr
));
1493 case nir_instr_type_parallel_copy
:
1494 unreachable("Cannot write parallel copies");
1496 unreachable("bad instr type");
1501 read_instr(read_ctx
*ctx
, nir_block
*block
)
1503 STATIC_ASSERT(sizeof(union packed_instr
) == 4);
1504 union packed_instr header
;
1505 header
.u32
= blob_read_uint32(ctx
->blob
);
1508 switch (header
.any
.instr_type
) {
1509 case nir_instr_type_alu
:
1510 instr
= &read_alu(ctx
, header
)->instr
;
1512 case nir_instr_type_deref
:
1513 instr
= &read_deref(ctx
, header
)->instr
;
1515 case nir_instr_type_intrinsic
:
1516 instr
= &read_intrinsic(ctx
, header
)->instr
;
1518 case nir_instr_type_load_const
:
1519 instr
= &read_load_const(ctx
, header
)->instr
;
1521 case nir_instr_type_ssa_undef
:
1522 instr
= &read_ssa_undef(ctx
, header
)->instr
;
1524 case nir_instr_type_tex
:
1525 instr
= &read_tex(ctx
, header
)->instr
;
1527 case nir_instr_type_phi
:
1528 /* Phi instructions are a bit of a special case when reading because we
1529 * don't want inserting the instruction to automatically handle use/defs
1530 * for us. Instead, we need to wait until all the blocks/instructions
1531 * are read so that we can set their sources up.
1533 read_phi(ctx
, block
, header
);
1535 case nir_instr_type_jump
:
1536 instr
= &read_jump(ctx
, header
)->instr
;
1538 case nir_instr_type_call
:
1539 instr
= &read_call(ctx
)->instr
;
1541 case nir_instr_type_parallel_copy
:
1542 unreachable("Cannot read parallel copies");
1544 unreachable("bad instr type");
1547 nir_instr_insert_after_block(block
, instr
);
1551 write_block(write_ctx
*ctx
, const nir_block
*block
)
1553 write_add_object(ctx
, block
);
1554 blob_write_uint32(ctx
->blob
, exec_list_length(&block
->instr_list
));
1555 nir_foreach_instr(instr
, block
)
1556 write_instr(ctx
, instr
);
1560 read_block(read_ctx
*ctx
, struct exec_list
*cf_list
)
1562 /* Don't actually create a new block. Just use the one from the tail of
1563 * the list. NIR guarantees that the tail of the list is a block and that
1564 * no two blocks are side-by-side in the IR; It should be empty.
1567 exec_node_data(nir_block
, exec_list_get_tail(cf_list
), cf_node
.node
);
1569 read_add_object(ctx
, block
);
1570 unsigned num_instrs
= blob_read_uint32(ctx
->blob
);
1571 for (unsigned i
= 0; i
< num_instrs
; i
++) {
1572 read_instr(ctx
, block
);
1577 write_cf_list(write_ctx
*ctx
, const struct exec_list
*cf_list
);
1580 read_cf_list(read_ctx
*ctx
, struct exec_list
*cf_list
);
1583 write_if(write_ctx
*ctx
, nir_if
*nif
)
1585 write_src(ctx
, &nif
->condition
);
1587 write_cf_list(ctx
, &nif
->then_list
);
1588 write_cf_list(ctx
, &nif
->else_list
);
1592 read_if(read_ctx
*ctx
, struct exec_list
*cf_list
)
1594 nir_if
*nif
= nir_if_create(ctx
->nir
);
1596 read_src(ctx
, &nif
->condition
, nif
);
1598 nir_cf_node_insert_end(cf_list
, &nif
->cf_node
);
1600 read_cf_list(ctx
, &nif
->then_list
);
1601 read_cf_list(ctx
, &nif
->else_list
);
1605 write_loop(write_ctx
*ctx
, nir_loop
*loop
)
1607 write_cf_list(ctx
, &loop
->body
);
1611 read_loop(read_ctx
*ctx
, struct exec_list
*cf_list
)
1613 nir_loop
*loop
= nir_loop_create(ctx
->nir
);
1615 nir_cf_node_insert_end(cf_list
, &loop
->cf_node
);
1617 read_cf_list(ctx
, &loop
->body
);
1621 write_cf_node(write_ctx
*ctx
, nir_cf_node
*cf
)
1623 blob_write_uint32(ctx
->blob
, cf
->type
);
1626 case nir_cf_node_block
:
1627 write_block(ctx
, nir_cf_node_as_block(cf
));
1629 case nir_cf_node_if
:
1630 write_if(ctx
, nir_cf_node_as_if(cf
));
1632 case nir_cf_node_loop
:
1633 write_loop(ctx
, nir_cf_node_as_loop(cf
));
1636 unreachable("bad cf type");
1641 read_cf_node(read_ctx
*ctx
, struct exec_list
*list
)
1643 nir_cf_node_type type
= blob_read_uint32(ctx
->blob
);
1646 case nir_cf_node_block
:
1647 read_block(ctx
, list
);
1649 case nir_cf_node_if
:
1652 case nir_cf_node_loop
:
1653 read_loop(ctx
, list
);
1656 unreachable("bad cf type");
1661 write_cf_list(write_ctx
*ctx
, const struct exec_list
*cf_list
)
1663 blob_write_uint32(ctx
->blob
, exec_list_length(cf_list
));
1664 foreach_list_typed(nir_cf_node
, cf
, node
, cf_list
) {
1665 write_cf_node(ctx
, cf
);
1670 read_cf_list(read_ctx
*ctx
, struct exec_list
*cf_list
)
1672 uint32_t num_cf_nodes
= blob_read_uint32(ctx
->blob
);
1673 for (unsigned i
= 0; i
< num_cf_nodes
; i
++)
1674 read_cf_node(ctx
, cf_list
);
1678 write_function_impl(write_ctx
*ctx
, const nir_function_impl
*fi
)
1680 write_var_list(ctx
, &fi
->locals
);
1681 write_reg_list(ctx
, &fi
->registers
);
1682 blob_write_uint32(ctx
->blob
, fi
->reg_alloc
);
1684 write_cf_list(ctx
, &fi
->body
);
1685 write_fixup_phis(ctx
);
1688 static nir_function_impl
*
1689 read_function_impl(read_ctx
*ctx
, nir_function
*fxn
)
1691 nir_function_impl
*fi
= nir_function_impl_create_bare(ctx
->nir
);
1694 read_var_list(ctx
, &fi
->locals
);
1695 read_reg_list(ctx
, &fi
->registers
);
1696 fi
->reg_alloc
= blob_read_uint32(ctx
->blob
);
1698 read_cf_list(ctx
, &fi
->body
);
1699 read_fixup_phis(ctx
);
1701 fi
->valid_metadata
= 0;
1707 write_function(write_ctx
*ctx
, const nir_function
*fxn
)
1709 uint32_t flags
= fxn
->is_entrypoint
;
1714 blob_write_uint32(ctx
->blob
, flags
);
1716 blob_write_string(ctx
->blob
, fxn
->name
);
1718 write_add_object(ctx
, fxn
);
1720 blob_write_uint32(ctx
->blob
, fxn
->num_params
);
1721 for (unsigned i
= 0; i
< fxn
->num_params
; i
++) {
1723 ((uint32_t)fxn
->params
[i
].num_components
) |
1724 ((uint32_t)fxn
->params
[i
].bit_size
) << 8;
1725 blob_write_uint32(ctx
->blob
, val
);
1728 /* At first glance, it looks like we should write the function_impl here.
1729 * However, call instructions need to be able to reference at least the
1730 * function and those will get processed as we write the function_impls.
1731 * We stop here and write function_impls as a second pass.
1736 read_function(read_ctx
*ctx
)
1738 uint32_t flags
= blob_read_uint32(ctx
->blob
);
1739 bool has_name
= flags
& 0x2;
1740 char *name
= has_name
? blob_read_string(ctx
->blob
) : NULL
;
1742 nir_function
*fxn
= nir_function_create(ctx
->nir
, name
);
1744 read_add_object(ctx
, fxn
);
1746 fxn
->num_params
= blob_read_uint32(ctx
->blob
);
1747 fxn
->params
= ralloc_array(fxn
, nir_parameter
, fxn
->num_params
);
1748 for (unsigned i
= 0; i
< fxn
->num_params
; i
++) {
1749 uint32_t val
= blob_read_uint32(ctx
->blob
);
1750 fxn
->params
[i
].num_components
= val
& 0xff;
1751 fxn
->params
[i
].bit_size
= (val
>> 8) & 0xff;
1754 fxn
->is_entrypoint
= flags
& 0x1;
1756 fxn
->impl
= NIR_SERIALIZE_FUNC_HAS_IMPL
;
1760 * Serialize NIR into a binary blob.
1762 * \param strip Don't serialize information only useful for debugging,
1763 * such as variable names, making cache hits from similar
1764 * shaders more likely.
1767 nir_serialize(struct blob
*blob
, const nir_shader
*nir
, bool strip
)
1769 write_ctx ctx
= {0};
1770 ctx
.remap_table
= _mesa_pointer_hash_table_create(NULL
);
1774 util_dynarray_init(&ctx
.phi_fixups
, NULL
);
1776 size_t idx_size_offset
= blob_reserve_uint32(blob
);
1778 struct shader_info info
= nir
->info
;
1779 uint32_t strings
= 0;
1780 if (!strip
&& info
.name
)
1782 if (!strip
&& info
.label
)
1784 blob_write_uint32(blob
, strings
);
1785 if (!strip
&& info
.name
)
1786 blob_write_string(blob
, info
.name
);
1787 if (!strip
&& info
.label
)
1788 blob_write_string(blob
, info
.label
);
1789 info
.name
= info
.label
= NULL
;
1790 blob_write_bytes(blob
, (uint8_t *) &info
, sizeof(info
));
1792 write_var_list(&ctx
, &nir
->uniforms
);
1793 write_var_list(&ctx
, &nir
->inputs
);
1794 write_var_list(&ctx
, &nir
->outputs
);
1795 write_var_list(&ctx
, &nir
->shared
);
1796 write_var_list(&ctx
, &nir
->globals
);
1797 write_var_list(&ctx
, &nir
->system_values
);
1799 blob_write_uint32(blob
, nir
->num_inputs
);
1800 blob_write_uint32(blob
, nir
->num_uniforms
);
1801 blob_write_uint32(blob
, nir
->num_outputs
);
1802 blob_write_uint32(blob
, nir
->num_shared
);
1803 blob_write_uint32(blob
, nir
->scratch_size
);
1805 blob_write_uint32(blob
, exec_list_length(&nir
->functions
));
1806 nir_foreach_function(fxn
, nir
) {
1807 write_function(&ctx
, fxn
);
1810 nir_foreach_function(fxn
, nir
) {
1812 write_function_impl(&ctx
, fxn
->impl
);
1815 blob_write_uint32(blob
, nir
->constant_data_size
);
1816 if (nir
->constant_data_size
> 0)
1817 blob_write_bytes(blob
, nir
->constant_data
, nir
->constant_data_size
);
1819 *(uint32_t *)(blob
->data
+ idx_size_offset
) = ctx
.next_idx
;
1821 _mesa_hash_table_destroy(ctx
.remap_table
, NULL
);
1822 util_dynarray_fini(&ctx
.phi_fixups
);
1826 nir_deserialize(void *mem_ctx
,
1827 const struct nir_shader_compiler_options
*options
,
1828 struct blob_reader
*blob
)
1832 list_inithead(&ctx
.phi_srcs
);
1833 ctx
.idx_table_len
= blob_read_uint32(blob
);
1834 ctx
.idx_table
= calloc(ctx
.idx_table_len
, sizeof(uintptr_t));
1836 uint32_t strings
= blob_read_uint32(blob
);
1837 char *name
= (strings
& 0x1) ? blob_read_string(blob
) : NULL
;
1838 char *label
= (strings
& 0x2) ? blob_read_string(blob
) : NULL
;
1840 struct shader_info info
;
1841 blob_copy_bytes(blob
, (uint8_t *) &info
, sizeof(info
));
1843 ctx
.nir
= nir_shader_create(mem_ctx
, info
.stage
, options
, NULL
);
1845 info
.name
= name
? ralloc_strdup(ctx
.nir
, name
) : NULL
;
1846 info
.label
= label
? ralloc_strdup(ctx
.nir
, label
) : NULL
;
1848 ctx
.nir
->info
= info
;
1850 read_var_list(&ctx
, &ctx
.nir
->uniforms
);
1851 read_var_list(&ctx
, &ctx
.nir
->inputs
);
1852 read_var_list(&ctx
, &ctx
.nir
->outputs
);
1853 read_var_list(&ctx
, &ctx
.nir
->shared
);
1854 read_var_list(&ctx
, &ctx
.nir
->globals
);
1855 read_var_list(&ctx
, &ctx
.nir
->system_values
);
1857 ctx
.nir
->num_inputs
= blob_read_uint32(blob
);
1858 ctx
.nir
->num_uniforms
= blob_read_uint32(blob
);
1859 ctx
.nir
->num_outputs
= blob_read_uint32(blob
);
1860 ctx
.nir
->num_shared
= blob_read_uint32(blob
);
1861 ctx
.nir
->scratch_size
= blob_read_uint32(blob
);
1863 unsigned num_functions
= blob_read_uint32(blob
);
1864 for (unsigned i
= 0; i
< num_functions
; i
++)
1865 read_function(&ctx
);
1867 nir_foreach_function(fxn
, ctx
.nir
) {
1868 if (fxn
->impl
== NIR_SERIALIZE_FUNC_HAS_IMPL
)
1869 fxn
->impl
= read_function_impl(&ctx
, fxn
);
1872 ctx
.nir
->constant_data_size
= blob_read_uint32(blob
);
1873 if (ctx
.nir
->constant_data_size
> 0) {
1874 ctx
.nir
->constant_data
=
1875 ralloc_size(ctx
.nir
, ctx
.nir
->constant_data_size
);
1876 blob_copy_bytes(blob
, ctx
.nir
->constant_data
,
1877 ctx
.nir
->constant_data_size
);
1880 free(ctx
.idx_table
);
1886 nir_shader_serialize_deserialize(nir_shader
*shader
)
1888 const struct nir_shader_compiler_options
*options
= shader
->options
;
1892 nir_serialize(&writer
, shader
, false);
1894 /* Delete all of dest's ralloc children but leave dest alone */
1895 void *dead_ctx
= ralloc_context(NULL
);
1896 ralloc_adopt(dead_ctx
, shader
);
1897 ralloc_free(dead_ctx
);
1899 dead_ctx
= ralloc_context(NULL
);
1901 struct blob_reader reader
;
1902 blob_reader_init(&reader
, writer
.data
, writer
.size
);
1903 nir_shader
*copy
= nir_deserialize(dead_ctx
, options
, &reader
);
1905 blob_finish(&writer
);
1907 nir_shader_replace(shader
, copy
);
1908 ralloc_free(dead_ctx
);