2 * Copyright © 2016 Broadcom
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
25 #include "util/format/u_format.h"
26 #include "util/u_helpers.h"
27 #include "util/u_math.h"
28 #include "util/u_memory.h"
29 #include "util/ralloc.h"
30 #include "util/hash_table.h"
31 #include "compiler/nir/nir.h"
32 #include "compiler/nir/nir_builder.h"
33 #include "common/v3d_device_info.h"
34 #include "v3d_compiler.h"
36 /* We don't do any address packing. */
37 #define __gen_user_data void
38 #define __gen_address_type uint32_t
39 #define __gen_address_offset(reloc) (*reloc)
40 #define __gen_emit_reloc(cl, reloc)
41 #include "cle/v3d_packet_v41_pack.h"
43 #define GENERAL_TMU_LOOKUP_PER_QUAD (0 << 7)
44 #define GENERAL_TMU_LOOKUP_PER_PIXEL (1 << 7)
45 #define GENERAL_TMU_LOOKUP_TYPE_8BIT_I (0 << 0)
46 #define GENERAL_TMU_LOOKUP_TYPE_16BIT_I (1 << 0)
47 #define GENERAL_TMU_LOOKUP_TYPE_VEC2 (2 << 0)
48 #define GENERAL_TMU_LOOKUP_TYPE_VEC3 (3 << 0)
49 #define GENERAL_TMU_LOOKUP_TYPE_VEC4 (4 << 0)
50 #define GENERAL_TMU_LOOKUP_TYPE_8BIT_UI (5 << 0)
51 #define GENERAL_TMU_LOOKUP_TYPE_16BIT_UI (6 << 0)
52 #define GENERAL_TMU_LOOKUP_TYPE_32BIT_UI (7 << 0)
54 #define V3D_TSY_SET_QUORUM 0
55 #define V3D_TSY_INC_WAITERS 1
56 #define V3D_TSY_DEC_WAITERS 2
57 #define V3D_TSY_INC_QUORUM 3
58 #define V3D_TSY_DEC_QUORUM 4
59 #define V3D_TSY_FREE_ALL 5
60 #define V3D_TSY_RELEASE 6
61 #define V3D_TSY_ACQUIRE 7
62 #define V3D_TSY_WAIT 8
63 #define V3D_TSY_WAIT_INC 9
64 #define V3D_TSY_WAIT_CHECK 10
65 #define V3D_TSY_WAIT_INC_CHECK 11
66 #define V3D_TSY_WAIT_CV 12
67 #define V3D_TSY_INC_SEMAPHORE 13
68 #define V3D_TSY_DEC_SEMAPHORE 14
69 #define V3D_TSY_SET_QUORUM_FREE_ALL 15
72 ntq_emit_cf_list(struct v3d_compile
*c
, struct exec_list
*list
);
75 resize_qreg_array(struct v3d_compile
*c
,
80 if (*size
>= decl_size
)
83 uint32_t old_size
= *size
;
84 *size
= MAX2(*size
* 2, decl_size
);
85 *regs
= reralloc(c
, *regs
, struct qreg
, *size
);
87 fprintf(stderr
, "Malloc failure\n");
91 for (uint32_t i
= old_size
; i
< *size
; i
++)
92 (*regs
)[i
] = c
->undef
;
96 vir_emit_thrsw(struct v3d_compile
*c
)
101 /* Always thread switch after each texture operation for now.
103 * We could do better by batching a bunch of texture fetches up and
104 * then doing one thread switch and collecting all their results
107 c
->last_thrsw
= vir_NOP(c
);
108 c
->last_thrsw
->qpu
.sig
.thrsw
= true;
109 c
->last_thrsw_at_top_level
= !c
->in_control_flow
;
111 /* We need to lock the scoreboard before any tlb acess happens. If this
112 * thread switch comes after we have emitted a tlb load, then it means
113 * that we can't lock on the last thread switch any more.
115 if (c
->emitted_tlb_load
)
116 c
->lock_scoreboard_on_first_thrsw
= true;
120 v3d_get_op_for_atomic_add(nir_intrinsic_instr
*instr
, unsigned src
)
122 if (nir_src_is_const(instr
->src
[src
])) {
123 int64_t add_val
= nir_src_as_int(instr
->src
[src
]);
125 return V3D_TMU_OP_WRITE_AND_READ_INC
;
126 else if (add_val
== -1)
127 return V3D_TMU_OP_WRITE_OR_READ_DEC
;
130 return V3D_TMU_OP_WRITE_ADD_READ_PREFETCH
;
134 v3d_general_tmu_op(nir_intrinsic_instr
*instr
)
136 switch (instr
->intrinsic
) {
137 case nir_intrinsic_load_ssbo
:
138 case nir_intrinsic_load_ubo
:
139 case nir_intrinsic_load_uniform
:
140 case nir_intrinsic_load_shared
:
141 case nir_intrinsic_load_scratch
:
142 case nir_intrinsic_store_ssbo
:
143 case nir_intrinsic_store_shared
:
144 case nir_intrinsic_store_scratch
:
145 return V3D_TMU_OP_REGULAR
;
146 case nir_intrinsic_ssbo_atomic_add
:
147 return v3d_get_op_for_atomic_add(instr
, 2);
148 case nir_intrinsic_shared_atomic_add
:
149 return v3d_get_op_for_atomic_add(instr
, 1);
150 case nir_intrinsic_ssbo_atomic_imin
:
151 case nir_intrinsic_shared_atomic_imin
:
152 return V3D_TMU_OP_WRITE_SMIN
;
153 case nir_intrinsic_ssbo_atomic_umin
:
154 case nir_intrinsic_shared_atomic_umin
:
155 return V3D_TMU_OP_WRITE_UMIN_FULL_L1_CLEAR
;
156 case nir_intrinsic_ssbo_atomic_imax
:
157 case nir_intrinsic_shared_atomic_imax
:
158 return V3D_TMU_OP_WRITE_SMAX
;
159 case nir_intrinsic_ssbo_atomic_umax
:
160 case nir_intrinsic_shared_atomic_umax
:
161 return V3D_TMU_OP_WRITE_UMAX
;
162 case nir_intrinsic_ssbo_atomic_and
:
163 case nir_intrinsic_shared_atomic_and
:
164 return V3D_TMU_OP_WRITE_AND_READ_INC
;
165 case nir_intrinsic_ssbo_atomic_or
:
166 case nir_intrinsic_shared_atomic_or
:
167 return V3D_TMU_OP_WRITE_OR_READ_DEC
;
168 case nir_intrinsic_ssbo_atomic_xor
:
169 case nir_intrinsic_shared_atomic_xor
:
170 return V3D_TMU_OP_WRITE_XOR_READ_NOT
;
171 case nir_intrinsic_ssbo_atomic_exchange
:
172 case nir_intrinsic_shared_atomic_exchange
:
173 return V3D_TMU_OP_WRITE_XCHG_READ_FLUSH
;
174 case nir_intrinsic_ssbo_atomic_comp_swap
:
175 case nir_intrinsic_shared_atomic_comp_swap
:
176 return V3D_TMU_OP_WRITE_CMPXCHG_READ_FLUSH
;
178 unreachable("unknown intrinsic op");
183 * Implements indirect uniform loads and SSBO accesses through the TMU general
184 * memory access interface.
187 ntq_emit_tmu_general(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
,
188 bool is_shared_or_scratch
)
190 uint32_t tmu_op
= v3d_general_tmu_op(instr
);
192 /* If we were able to replace atomic_add for an inc/dec, then we
193 * need/can to do things slightly different, like not loading the
194 * amount to add/sub, as that is implicit.
196 bool atomic_add_replaced
=
197 ((instr
->intrinsic
== nir_intrinsic_ssbo_atomic_add
||
198 instr
->intrinsic
== nir_intrinsic_shared_atomic_add
) &&
199 (tmu_op
== V3D_TMU_OP_WRITE_AND_READ_INC
||
200 tmu_op
== V3D_TMU_OP_WRITE_OR_READ_DEC
));
202 bool is_store
= (instr
->intrinsic
== nir_intrinsic_store_ssbo
||
203 instr
->intrinsic
== nir_intrinsic_store_scratch
||
204 instr
->intrinsic
== nir_intrinsic_store_shared
);
206 bool is_load
= (instr
->intrinsic
== nir_intrinsic_load_uniform
||
207 instr
->intrinsic
== nir_intrinsic_load_ubo
||
208 instr
->intrinsic
== nir_intrinsic_load_ssbo
||
209 instr
->intrinsic
== nir_intrinsic_load_scratch
||
210 instr
->intrinsic
== nir_intrinsic_load_shared
);
213 c
->tmu_dirty_rcl
= true;
215 bool has_index
= !is_shared_or_scratch
;
218 if (instr
->intrinsic
== nir_intrinsic_load_uniform
) {
220 } else if (instr
->intrinsic
== nir_intrinsic_load_ssbo
||
221 instr
->intrinsic
== nir_intrinsic_load_ubo
||
222 instr
->intrinsic
== nir_intrinsic_load_scratch
||
223 instr
->intrinsic
== nir_intrinsic_load_shared
||
224 atomic_add_replaced
) {
225 offset_src
= 0 + has_index
;
226 } else if (is_store
) {
227 offset_src
= 1 + has_index
;
229 offset_src
= 0 + has_index
;
232 bool dynamic_src
= !nir_src_is_const(instr
->src
[offset_src
]);
233 uint32_t const_offset
= 0;
235 const_offset
= nir_src_as_uint(instr
->src
[offset_src
]);
237 struct qreg base_offset
;
238 if (instr
->intrinsic
== nir_intrinsic_load_uniform
) {
239 const_offset
+= nir_intrinsic_base(instr
);
240 base_offset
= vir_uniform(c
, QUNIFORM_UBO_ADDR
,
241 v3d_unit_data_create(0, const_offset
));
243 } else if (instr
->intrinsic
== nir_intrinsic_load_ubo
) {
244 uint32_t index
= nir_src_as_uint(instr
->src
[0]) + 1;
245 /* Note that QUNIFORM_UBO_ADDR takes a UBO index shifted up by
246 * 1 (0 is gallium's constant buffer 0).
249 vir_uniform(c
, QUNIFORM_UBO_ADDR
,
250 v3d_unit_data_create(index
, const_offset
));
252 } else if (is_shared_or_scratch
) {
253 /* Shared and scratch variables have no buffer index, and all
254 * start from a common base that we set up at the start of
257 if (instr
->intrinsic
== nir_intrinsic_load_scratch
||
258 instr
->intrinsic
== nir_intrinsic_store_scratch
) {
259 base_offset
= c
->spill_base
;
261 base_offset
= c
->cs_shared_offset
;
262 const_offset
+= nir_intrinsic_base(instr
);
265 base_offset
= vir_uniform(c
, QUNIFORM_SSBO_OFFSET
,
266 nir_src_as_uint(instr
->src
[is_store
?
270 struct qreg tmud
= vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_TMUD
);
271 unsigned writemask
= is_store
? nir_intrinsic_write_mask(instr
) : 0;
272 uint32_t base_const_offset
= const_offset
;
273 int first_component
= -1;
274 int last_component
= -1;
276 int tmu_writes
= 1; /* address */
279 /* Find the first set of consecutive components that
280 * are enabled in the writemask and emit the TMUD
281 * instructions for them.
283 first_component
= ffs(writemask
) - 1;
284 last_component
= first_component
;
285 while (writemask
& BITFIELD_BIT(last_component
+ 1))
288 assert(first_component
>= 0 &&
289 first_component
<= last_component
&&
290 last_component
< instr
->num_components
);
292 struct qreg tmud
= vir_reg(QFILE_MAGIC
,
294 for (int i
= first_component
; i
<= last_component
; i
++) {
296 ntq_get_src(c
, instr
->src
[0], i
);
297 vir_MOV_dest(c
, tmud
, data
);
301 /* Update the offset for the TMU write based on the
302 * the first component we are writing.
304 const_offset
= base_const_offset
+ first_component
* 4;
306 /* Clear these components from the writemask */
307 uint32_t written_mask
=
308 BITFIELD_RANGE(first_component
, tmu_writes
- 1);
309 writemask
&= ~written_mask
;
310 } else if (!is_load
&& !atomic_add_replaced
) {
312 ntq_get_src(c
, instr
->src
[1 + has_index
], 0);
313 vir_MOV_dest(c
, tmud
, data
);
315 if (tmu_op
== V3D_TMU_OP_WRITE_CMPXCHG_READ_FLUSH
) {
316 data
= ntq_get_src(c
, instr
->src
[2 + has_index
],
318 vir_MOV_dest(c
, tmud
, data
);
323 /* Make sure we won't exceed the 16-entry TMU fifo if each
324 * thread is storing at the same time.
326 while (tmu_writes
> 16 / c
->threads
)
329 /* The spec says that for atomics, the TYPE field is ignored,
330 * but that doesn't seem to be the case for CMPXCHG. Just use
331 * the number of tmud writes we did to decide the type (or
332 * choose "32bit" for atomic reads, which has been fine).
334 uint32_t num_components
;
335 if (is_load
|| atomic_add_replaced
) {
336 num_components
= instr
->num_components
;
338 assert(tmu_writes
> 1);
339 num_components
= tmu_writes
- 1;
342 uint32_t config
= (0xffffff00 |
344 GENERAL_TMU_LOOKUP_PER_PIXEL
);
345 if (num_components
== 1) {
346 config
|= GENERAL_TMU_LOOKUP_TYPE_32BIT_UI
;
348 config
|= GENERAL_TMU_LOOKUP_TYPE_VEC2
+
352 if (vir_in_nonuniform_control_flow(c
)) {
353 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
359 tmua
= vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_TMUA
);
361 tmua
= vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_TMUAU
);
365 struct qreg offset
= base_offset
;
366 if (const_offset
!= 0) {
367 offset
= vir_ADD(c
, offset
,
368 vir_uniform_ui(c
, const_offset
));
371 ntq_get_src(c
, instr
->src
[offset_src
], 0);
372 tmu
= vir_ADD_dest(c
, tmua
, offset
, data
);
374 if (const_offset
!= 0) {
375 tmu
= vir_ADD_dest(c
, tmua
, base_offset
,
376 vir_uniform_ui(c
, const_offset
));
378 tmu
= vir_MOV_dest(c
, tmua
, base_offset
);
384 vir_get_uniform_index(c
, QUNIFORM_CONSTANT
,
388 if (vir_in_nonuniform_control_flow(c
))
389 vir_set_cond(tmu
, V3D_QPU_COND_IFA
);
393 /* Read the result, or wait for the TMU op to complete. */
394 for (int i
= 0; i
< nir_intrinsic_dest_components(instr
); i
++) {
395 ntq_store_dest(c
, &instr
->dest
, i
,
396 vir_MOV(c
, vir_LDTMU(c
)));
399 if (nir_intrinsic_dest_components(instr
) == 0)
401 } while (is_store
&& writemask
!= 0);
405 ntq_init_ssa_def(struct v3d_compile
*c
, nir_ssa_def
*def
)
407 struct qreg
*qregs
= ralloc_array(c
->def_ht
, struct qreg
,
408 def
->num_components
);
409 _mesa_hash_table_insert(c
->def_ht
, def
, qregs
);
414 is_ld_signal(const struct v3d_qpu_sig
*sig
)
416 return (sig
->ldunif
||
428 * This function is responsible for getting VIR results into the associated
429 * storage for a NIR instruction.
431 * If it's a NIR SSA def, then we just set the associated hash table entry to
434 * If it's a NIR reg, then we need to update the existing qreg assigned to the
435 * NIR destination with the incoming value. To do that without introducing
436 * new MOVs, we require that the incoming qreg either be a uniform, or be
437 * SSA-defined by the previous VIR instruction in the block and rewritable by
438 * this function. That lets us sneak ahead and insert the SF flag beforehand
439 * (knowing that the previous instruction doesn't depend on flags) and rewrite
440 * its destination to be the NIR reg's destination
443 ntq_store_dest(struct v3d_compile
*c
, nir_dest
*dest
, int chan
,
446 struct qinst
*last_inst
= NULL
;
447 if (!list_is_empty(&c
->cur_block
->instructions
))
448 last_inst
= (struct qinst
*)c
->cur_block
->instructions
.prev
;
450 assert((result
.file
== QFILE_TEMP
&&
451 last_inst
&& last_inst
== c
->defs
[result
.index
]));
454 assert(chan
< dest
->ssa
.num_components
);
457 struct hash_entry
*entry
=
458 _mesa_hash_table_search(c
->def_ht
, &dest
->ssa
);
463 qregs
= ntq_init_ssa_def(c
, &dest
->ssa
);
465 qregs
[chan
] = result
;
467 nir_register
*reg
= dest
->reg
.reg
;
468 assert(dest
->reg
.base_offset
== 0);
469 assert(reg
->num_array_elems
== 0);
470 struct hash_entry
*entry
=
471 _mesa_hash_table_search(c
->def_ht
, reg
);
472 struct qreg
*qregs
= entry
->data
;
474 /* If the previous instruction can't be predicated for
475 * the store into the nir_register, then emit a MOV
478 if (vir_in_nonuniform_control_flow(c
) &&
479 is_ld_signal(&c
->defs
[last_inst
->dst
.index
]->qpu
.sig
)) {
480 result
= vir_MOV(c
, result
);
481 last_inst
= c
->defs
[result
.index
];
484 /* We know they're both temps, so just rewrite index. */
485 c
->defs
[last_inst
->dst
.index
] = NULL
;
486 last_inst
->dst
.index
= qregs
[chan
].index
;
488 /* If we're in control flow, then make this update of the reg
489 * conditional on the execution mask.
491 if (vir_in_nonuniform_control_flow(c
)) {
492 last_inst
->dst
.index
= qregs
[chan
].index
;
494 /* Set the flags to the current exec mask.
496 c
->cursor
= vir_before_inst(last_inst
);
497 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
499 c
->cursor
= vir_after_inst(last_inst
);
501 vir_set_cond(last_inst
, V3D_QPU_COND_IFA
);
507 ntq_get_src(struct v3d_compile
*c
, nir_src src
, int i
)
509 struct hash_entry
*entry
;
511 entry
= _mesa_hash_table_search(c
->def_ht
, src
.ssa
);
512 assert(i
< src
.ssa
->num_components
);
514 nir_register
*reg
= src
.reg
.reg
;
515 entry
= _mesa_hash_table_search(c
->def_ht
, reg
);
516 assert(reg
->num_array_elems
== 0);
517 assert(src
.reg
.base_offset
== 0);
518 assert(i
< reg
->num_components
);
521 struct qreg
*qregs
= entry
->data
;
526 ntq_get_alu_src(struct v3d_compile
*c
, nir_alu_instr
*instr
,
529 assert(util_is_power_of_two_or_zero(instr
->dest
.write_mask
));
530 unsigned chan
= ffs(instr
->dest
.write_mask
) - 1;
531 struct qreg r
= ntq_get_src(c
, instr
->src
[src
].src
,
532 instr
->src
[src
].swizzle
[chan
]);
534 assert(!instr
->src
[src
].abs
);
535 assert(!instr
->src
[src
].negate
);
541 ntq_minify(struct v3d_compile
*c
, struct qreg size
, struct qreg level
)
543 return vir_MAX(c
, vir_SHR(c
, size
, level
), vir_uniform_ui(c
, 1));
547 ntq_emit_txs(struct v3d_compile
*c
, nir_tex_instr
*instr
)
549 unsigned unit
= instr
->texture_index
;
550 int lod_index
= nir_tex_instr_src_index(instr
, nir_tex_src_lod
);
551 int dest_size
= nir_tex_instr_dest_size(instr
);
553 struct qreg lod
= c
->undef
;
555 lod
= ntq_get_src(c
, instr
->src
[lod_index
].src
, 0);
557 for (int i
= 0; i
< dest_size
; i
++) {
559 enum quniform_contents contents
;
561 if (instr
->is_array
&& i
== dest_size
- 1)
562 contents
= QUNIFORM_TEXTURE_ARRAY_SIZE
;
564 contents
= QUNIFORM_TEXTURE_WIDTH
+ i
;
566 struct qreg size
= vir_uniform(c
, contents
, unit
);
568 switch (instr
->sampler_dim
) {
569 case GLSL_SAMPLER_DIM_1D
:
570 case GLSL_SAMPLER_DIM_2D
:
571 case GLSL_SAMPLER_DIM_MS
:
572 case GLSL_SAMPLER_DIM_3D
:
573 case GLSL_SAMPLER_DIM_CUBE
:
574 /* Don't minify the array size. */
575 if (!(instr
->is_array
&& i
== dest_size
- 1)) {
576 size
= ntq_minify(c
, size
, lod
);
580 case GLSL_SAMPLER_DIM_RECT
:
581 /* There's no LOD field for rects */
585 unreachable("Bad sampler type");
588 ntq_store_dest(c
, &instr
->dest
, i
, size
);
593 ntq_emit_tex(struct v3d_compile
*c
, nir_tex_instr
*instr
)
595 unsigned unit
= instr
->texture_index
;
597 /* Since each texture sampling op requires uploading uniforms to
598 * reference the texture, there's no HW support for texture size and
599 * you just upload uniforms containing the size.
602 case nir_texop_query_levels
:
603 ntq_store_dest(c
, &instr
->dest
, 0,
604 vir_uniform(c
, QUNIFORM_TEXTURE_LEVELS
, unit
));
607 ntq_emit_txs(c
, instr
);
613 if (c
->devinfo
->ver
>= 40)
614 v3d40_vir_emit_tex(c
, instr
);
616 v3d33_vir_emit_tex(c
, instr
);
620 ntq_fsincos(struct v3d_compile
*c
, struct qreg src
, bool is_cos
)
622 struct qreg input
= vir_FMUL(c
, src
, vir_uniform_f(c
, 1.0f
/ M_PI
));
624 input
= vir_FADD(c
, input
, vir_uniform_f(c
, 0.5));
626 struct qreg periods
= vir_FROUND(c
, input
);
627 struct qreg sin_output
= vir_SIN(c
, vir_FSUB(c
, input
, periods
));
628 return vir_XOR(c
, sin_output
, vir_SHL(c
,
629 vir_FTOIN(c
, periods
),
630 vir_uniform_ui(c
, -1)));
634 ntq_fsign(struct v3d_compile
*c
, struct qreg src
)
636 struct qreg t
= vir_get_temp(c
);
638 vir_MOV_dest(c
, t
, vir_uniform_f(c
, 0.0));
639 vir_set_pf(vir_FMOV_dest(c
, vir_nop_reg(), src
), V3D_QPU_PF_PUSHZ
);
640 vir_MOV_cond(c
, V3D_QPU_COND_IFNA
, t
, vir_uniform_f(c
, 1.0));
641 vir_set_pf(vir_FMOV_dest(c
, vir_nop_reg(), src
), V3D_QPU_PF_PUSHN
);
642 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, t
, vir_uniform_f(c
, -1.0));
643 return vir_MOV(c
, t
);
647 emit_fragcoord_input(struct v3d_compile
*c
, int attr
)
649 c
->inputs
[attr
* 4 + 0] = vir_FXCD(c
);
650 c
->inputs
[attr
* 4 + 1] = vir_FYCD(c
);
651 c
->inputs
[attr
* 4 + 2] = c
->payload_z
;
652 c
->inputs
[attr
* 4 + 3] = vir_RECIP(c
, c
->payload_w
);
656 emit_fragment_varying(struct v3d_compile
*c
, nir_variable
*var
,
657 uint8_t swizzle
, int array_index
)
659 struct qreg r3
= vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_R3
);
660 struct qreg r5
= vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_R5
);
663 if (c
->devinfo
->ver
>= 41) {
664 struct qinst
*ldvary
= vir_add_inst(V3D_QPU_A_NOP
, c
->undef
,
666 ldvary
->qpu
.sig
.ldvary
= true;
667 vary
= vir_emit_def(c
, ldvary
);
669 vir_NOP(c
)->qpu
.sig
.ldvary
= true;
673 /* For gl_PointCoord input or distance along a line, we'll be called
674 * with no nir_variable, and we don't count toward VPM size so we
675 * don't track an input slot.
678 return vir_FADD(c
, vir_FMUL(c
, vary
, c
->payload_w
), r5
);
681 int i
= c
->num_inputs
++;
683 v3d_slot_from_slot_and_component(var
->data
.location
+
684 array_index
, swizzle
);
686 switch (var
->data
.interpolation
) {
687 case INTERP_MODE_NONE
:
688 /* If a gl_FrontColor or gl_BackColor input has no interp
689 * qualifier, then if we're using glShadeModel(GL_FLAT) it
690 * needs to be flat shaded.
692 switch (var
->data
.location
+ array_index
) {
693 case VARYING_SLOT_COL0
:
694 case VARYING_SLOT_COL1
:
695 case VARYING_SLOT_BFC0
:
696 case VARYING_SLOT_BFC1
:
697 if (c
->fs_key
->shade_model_flat
) {
698 BITSET_SET(c
->flat_shade_flags
, i
);
699 vir_MOV_dest(c
, c
->undef
, vary
);
700 return vir_MOV(c
, r5
);
702 return vir_FADD(c
, vir_FMUL(c
, vary
,
709 case INTERP_MODE_SMOOTH
:
710 if (var
->data
.centroid
) {
711 BITSET_SET(c
->centroid_flags
, i
);
712 return vir_FADD(c
, vir_FMUL(c
, vary
,
713 c
->payload_w_centroid
), r5
);
715 return vir_FADD(c
, vir_FMUL(c
, vary
, c
->payload_w
), r5
);
717 case INTERP_MODE_NOPERSPECTIVE
:
718 BITSET_SET(c
->noperspective_flags
, i
);
719 return vir_FADD(c
, vir_MOV(c
, vary
), r5
);
720 case INTERP_MODE_FLAT
:
721 BITSET_SET(c
->flat_shade_flags
, i
);
722 vir_MOV_dest(c
, c
->undef
, vary
);
723 return vir_MOV(c
, r5
);
725 unreachable("Bad interp mode");
730 emit_fragment_input(struct v3d_compile
*c
, int attr
, nir_variable
*var
,
733 for (int i
= 0; i
< glsl_get_vector_elements(var
->type
); i
++) {
734 int chan
= var
->data
.location_frac
+ i
;
735 c
->inputs
[attr
* 4 + chan
] =
736 emit_fragment_varying(c
, var
, chan
, array_index
);
741 emit_compact_fragment_input(struct v3d_compile
*c
, int attr
, nir_variable
*var
,
744 /* Compact variables are scalar arrays where each set of 4 elements
745 * consumes a single location.
747 int loc_offset
= array_index
/ 4;
748 int chan
= var
->data
.location_frac
+ array_index
% 4;
749 c
->inputs
[(attr
+ loc_offset
) * 4 + chan
] =
750 emit_fragment_varying(c
, var
, chan
, loc_offset
);
754 add_output(struct v3d_compile
*c
,
755 uint32_t decl_offset
,
759 uint32_t old_array_size
= c
->outputs_array_size
;
760 resize_qreg_array(c
, &c
->outputs
, &c
->outputs_array_size
,
763 if (old_array_size
!= c
->outputs_array_size
) {
764 c
->output_slots
= reralloc(c
,
766 struct v3d_varying_slot
,
767 c
->outputs_array_size
);
770 c
->output_slots
[decl_offset
] =
771 v3d_slot_from_slot_and_component(slot
, swizzle
);
775 * If compare_instr is a valid comparison instruction, emits the
776 * compare_instr's comparison and returns the sel_instr's return value based
777 * on the compare_instr's result.
780 ntq_emit_comparison(struct v3d_compile
*c
,
781 nir_alu_instr
*compare_instr
,
782 enum v3d_qpu_cond
*out_cond
)
784 struct qreg src0
= ntq_get_alu_src(c
, compare_instr
, 0);
786 if (nir_op_infos
[compare_instr
->op
].num_inputs
> 1)
787 src1
= ntq_get_alu_src(c
, compare_instr
, 1);
788 bool cond_invert
= false;
789 struct qreg nop
= vir_nop_reg();
791 switch (compare_instr
->op
) {
794 vir_set_pf(vir_FCMP_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHZ
);
797 vir_set_pf(vir_XOR_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHZ
);
802 vir_set_pf(vir_FCMP_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHZ
);
806 vir_set_pf(vir_XOR_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHZ
);
812 vir_set_pf(vir_FCMP_dest(c
, nop
, src1
, src0
), V3D_QPU_PF_PUSHC
);
815 vir_set_pf(vir_MIN_dest(c
, nop
, src1
, src0
), V3D_QPU_PF_PUSHC
);
819 vir_set_pf(vir_SUB_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHC
);
825 vir_set_pf(vir_FCMP_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHN
);
828 vir_set_pf(vir_MIN_dest(c
, nop
, src1
, src0
), V3D_QPU_PF_PUSHC
);
831 vir_set_pf(vir_SUB_dest(c
, nop
, src0
, src1
), V3D_QPU_PF_PUSHC
);
835 vir_set_pf(vir_MOV_dest(c
, nop
, src0
), V3D_QPU_PF_PUSHZ
);
840 vir_set_pf(vir_FMOV_dest(c
, nop
, src0
), V3D_QPU_PF_PUSHZ
);
848 *out_cond
= cond_invert
? V3D_QPU_COND_IFNA
: V3D_QPU_COND_IFA
;
853 /* Finds an ALU instruction that generates our src value that could
854 * (potentially) be greedily emitted in the consuming instruction.
856 static struct nir_alu_instr
*
857 ntq_get_alu_parent(nir_src src
)
859 if (!src
.is_ssa
|| src
.ssa
->parent_instr
->type
!= nir_instr_type_alu
)
861 nir_alu_instr
*instr
= nir_instr_as_alu(src
.ssa
->parent_instr
);
865 /* If the ALU instr's srcs are non-SSA, then we would have to avoid
866 * moving emission of the ALU instr down past another write of the
869 for (int i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++) {
870 if (!instr
->src
[i
].src
.is_ssa
)
877 /* Turns a NIR bool into a condition code to predicate on. */
878 static enum v3d_qpu_cond
879 ntq_emit_bool_to_cond(struct v3d_compile
*c
, nir_src src
)
881 nir_alu_instr
*compare
= ntq_get_alu_parent(src
);
885 enum v3d_qpu_cond cond
;
886 if (ntq_emit_comparison(c
, compare
, &cond
))
890 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), ntq_get_src(c
, src
, 0)),
892 return V3D_QPU_COND_IFNA
;
896 ntq_emit_alu(struct v3d_compile
*c
, nir_alu_instr
*instr
)
898 /* This should always be lowered to ALU operations for V3D. */
899 assert(!instr
->dest
.saturate
);
901 /* Vectors are special in that they have non-scalarized writemasks,
902 * and just take the first swizzle channel for each argument in order
903 * into each writemask channel.
905 if (instr
->op
== nir_op_vec2
||
906 instr
->op
== nir_op_vec3
||
907 instr
->op
== nir_op_vec4
) {
909 for (int i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++)
910 srcs
[i
] = ntq_get_src(c
, instr
->src
[i
].src
,
911 instr
->src
[i
].swizzle
[0]);
912 for (int i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++)
913 ntq_store_dest(c
, &instr
->dest
.dest
, i
,
914 vir_MOV(c
, srcs
[i
]));
918 /* General case: We can just grab the one used channel per src. */
919 struct qreg src
[nir_op_infos
[instr
->op
].num_inputs
];
920 for (int i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++) {
921 src
[i
] = ntq_get_alu_src(c
, instr
, i
);
928 result
= vir_MOV(c
, src
[0]);
932 result
= vir_XOR(c
, src
[0], vir_uniform_ui(c
, 1 << 31));
935 result
= vir_NEG(c
, src
[0]);
939 result
= vir_FMUL(c
, src
[0], src
[1]);
942 result
= vir_FADD(c
, src
[0], src
[1]);
945 result
= vir_FSUB(c
, src
[0], src
[1]);
948 result
= vir_FMIN(c
, src
[0], src
[1]);
951 result
= vir_FMAX(c
, src
[0], src
[1]);
955 nir_alu_instr
*src0_alu
= ntq_get_alu_parent(instr
->src
[0].src
);
956 if (src0_alu
&& src0_alu
->op
== nir_op_fround_even
) {
957 result
= vir_FTOIN(c
, ntq_get_alu_src(c
, src0_alu
, 0));
959 result
= vir_FTOIZ(c
, src
[0]);
965 result
= vir_FTOUZ(c
, src
[0]);
968 result
= vir_ITOF(c
, src
[0]);
971 result
= vir_UTOF(c
, src
[0]);
974 result
= vir_AND(c
, src
[0], vir_uniform_f(c
, 1.0));
977 result
= vir_AND(c
, src
[0], vir_uniform_ui(c
, 1));
981 result
= vir_ADD(c
, src
[0], src
[1]);
984 result
= vir_SHR(c
, src
[0], src
[1]);
987 result
= vir_SUB(c
, src
[0], src
[1]);
990 result
= vir_ASR(c
, src
[0], src
[1]);
993 result
= vir_SHL(c
, src
[0], src
[1]);
996 result
= vir_MIN(c
, src
[0], src
[1]);
999 result
= vir_UMIN(c
, src
[0], src
[1]);
1002 result
= vir_MAX(c
, src
[0], src
[1]);
1005 result
= vir_UMAX(c
, src
[0], src
[1]);
1008 result
= vir_AND(c
, src
[0], src
[1]);
1011 result
= vir_OR(c
, src
[0], src
[1]);
1014 result
= vir_XOR(c
, src
[0], src
[1]);
1017 result
= vir_NOT(c
, src
[0]);
1020 case nir_op_ufind_msb
:
1021 result
= vir_SUB(c
, vir_uniform_ui(c
, 31), vir_CLZ(c
, src
[0]));
1025 result
= vir_UMUL(c
, src
[0], src
[1]);
1032 enum v3d_qpu_cond cond
;
1033 ASSERTED
bool ok
= ntq_emit_comparison(c
, instr
, &cond
);
1035 result
= vir_MOV(c
, vir_SEL(c
, cond
,
1036 vir_uniform_f(c
, 1.0),
1037 vir_uniform_f(c
, 0.0)));
1052 case nir_op_ult32
: {
1053 enum v3d_qpu_cond cond
;
1054 ASSERTED
bool ok
= ntq_emit_comparison(c
, instr
, &cond
);
1056 result
= vir_MOV(c
, vir_SEL(c
, cond
,
1057 vir_uniform_ui(c
, ~0),
1058 vir_uniform_ui(c
, 0)));
1062 case nir_op_b32csel
:
1065 ntq_emit_bool_to_cond(c
, instr
->src
[0].src
),
1070 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), src
[0]),
1072 result
= vir_MOV(c
, vir_SEL(c
, V3D_QPU_COND_IFNA
,
1077 result
= vir_RECIP(c
, src
[0]);
1080 result
= vir_RSQRT(c
, src
[0]);
1083 result
= vir_EXP(c
, src
[0]);
1086 result
= vir_LOG(c
, src
[0]);
1090 result
= vir_FCEIL(c
, src
[0]);
1093 result
= vir_FFLOOR(c
, src
[0]);
1095 case nir_op_fround_even
:
1096 result
= vir_FROUND(c
, src
[0]);
1099 result
= vir_FTRUNC(c
, src
[0]);
1103 result
= ntq_fsincos(c
, src
[0], false);
1106 result
= ntq_fsincos(c
, src
[0], true);
1110 result
= ntq_fsign(c
, src
[0]);
1114 result
= vir_FMOV(c
, src
[0]);
1115 vir_set_unpack(c
->defs
[result
.index
], 0, V3D_QPU_UNPACK_ABS
);
1120 result
= vir_MAX(c
, src
[0], vir_NEG(c
, src
[0]));
1124 case nir_op_fddx_coarse
:
1125 case nir_op_fddx_fine
:
1126 result
= vir_FDX(c
, src
[0]);
1130 case nir_op_fddy_coarse
:
1131 case nir_op_fddy_fine
:
1132 result
= vir_FDY(c
, src
[0]);
1135 case nir_op_uadd_carry
:
1136 vir_set_pf(vir_ADD_dest(c
, vir_nop_reg(), src
[0], src
[1]),
1138 result
= vir_MOV(c
, vir_SEL(c
, V3D_QPU_COND_IFA
,
1139 vir_uniform_ui(c
, ~0),
1140 vir_uniform_ui(c
, 0)));
1143 case nir_op_pack_half_2x16_split
:
1144 result
= vir_VFPACK(c
, src
[0], src
[1]);
1147 case nir_op_unpack_half_2x16_split_x
:
1148 result
= vir_FMOV(c
, src
[0]);
1149 vir_set_unpack(c
->defs
[result
.index
], 0, V3D_QPU_UNPACK_L
);
1152 case nir_op_unpack_half_2x16_split_y
:
1153 result
= vir_FMOV(c
, src
[0]);
1154 vir_set_unpack(c
->defs
[result
.index
], 0, V3D_QPU_UNPACK_H
);
1158 fprintf(stderr
, "unknown NIR ALU inst: ");
1159 nir_print_instr(&instr
->instr
, stderr
);
1160 fprintf(stderr
, "\n");
1164 /* We have a scalar result, so the instruction should only have a
1165 * single channel written to.
1167 assert(util_is_power_of_two_or_zero(instr
->dest
.write_mask
));
1168 ntq_store_dest(c
, &instr
->dest
.dest
,
1169 ffs(instr
->dest
.write_mask
) - 1, result
);
1172 /* Each TLB read/write setup (a render target or depth buffer) takes an 8-bit
1173 * specifier. They come from a register that's preloaded with 0xffffffff
1174 * (0xff gets you normal vec4 f16 RT0 writes), and when one is neaded the low
1175 * 8 bits are shifted off the bottom and 0xff shifted in from the top.
1177 #define TLB_TYPE_F16_COLOR (3 << 6)
1178 #define TLB_TYPE_I32_COLOR (1 << 6)
1179 #define TLB_TYPE_F32_COLOR (0 << 6)
1180 #define TLB_RENDER_TARGET_SHIFT 3 /* Reversed! 7 = RT 0, 0 = RT 7. */
1181 #define TLB_SAMPLE_MODE_PER_SAMPLE (0 << 2)
1182 #define TLB_SAMPLE_MODE_PER_PIXEL (1 << 2)
1183 #define TLB_F16_SWAP_HI_LO (1 << 1)
1184 #define TLB_VEC_SIZE_4_F16 (1 << 0)
1185 #define TLB_VEC_SIZE_2_F16 (0 << 0)
1186 #define TLB_VEC_SIZE_MINUS_1_SHIFT 0
1188 /* Triggers Z/Stencil testing, used when the shader state's "FS modifies Z"
1191 #define TLB_TYPE_DEPTH ((2 << 6) | (0 << 4))
1192 #define TLB_DEPTH_TYPE_INVARIANT (0 << 2) /* Unmodified sideband input used */
1193 #define TLB_DEPTH_TYPE_PER_PIXEL (1 << 2) /* QPU result used */
1194 #define TLB_V42_DEPTH_TYPE_INVARIANT (0 << 3) /* Unmodified sideband input used */
1195 #define TLB_V42_DEPTH_TYPE_PER_PIXEL (1 << 3) /* QPU result used */
1197 /* Stencil is a single 32-bit write. */
1198 #define TLB_TYPE_STENCIL_ALPHA ((2 << 6) | (1 << 4))
1201 vir_emit_tlb_color_write(struct v3d_compile
*c
, unsigned rt
)
1203 if (!(c
->fs_key
->cbufs
& (1 << rt
)) || !c
->output_color_var
[rt
])
1206 struct qreg tlb_reg
= vir_magic_reg(V3D_QPU_WADDR_TLB
);
1207 struct qreg tlbu_reg
= vir_magic_reg(V3D_QPU_WADDR_TLBU
);
1209 nir_variable
*var
= c
->output_color_var
[rt
];
1210 int num_components
= glsl_get_vector_elements(var
->type
);
1211 uint32_t conf
= 0xffffff00;
1214 conf
|= c
->msaa_per_sample_output
? TLB_SAMPLE_MODE_PER_SAMPLE
:
1215 TLB_SAMPLE_MODE_PER_PIXEL
;
1216 conf
|= (7 - rt
) << TLB_RENDER_TARGET_SHIFT
;
1218 if (c
->fs_key
->swap_color_rb
& (1 << rt
))
1219 num_components
= MAX2(num_components
, 3);
1220 assert(num_components
!= 0);
1222 enum glsl_base_type type
= glsl_get_base_type(var
->type
);
1223 bool is_int_format
= type
== GLSL_TYPE_INT
|| type
== GLSL_TYPE_UINT
;
1224 bool is_32b_tlb_format
= is_int_format
||
1225 (c
->fs_key
->f32_color_rb
& (1 << rt
));
1227 if (is_int_format
) {
1228 /* The F32 vs I32 distinction was dropped in 4.2. */
1229 if (c
->devinfo
->ver
< 42)
1230 conf
|= TLB_TYPE_I32_COLOR
;
1232 conf
|= TLB_TYPE_F32_COLOR
;
1233 conf
|= ((num_components
- 1) << TLB_VEC_SIZE_MINUS_1_SHIFT
);
1235 if (c
->fs_key
->f32_color_rb
& (1 << rt
)) {
1236 conf
|= TLB_TYPE_F32_COLOR
;
1237 conf
|= ((num_components
- 1) <<
1238 TLB_VEC_SIZE_MINUS_1_SHIFT
);
1240 conf
|= TLB_TYPE_F16_COLOR
;
1241 conf
|= TLB_F16_SWAP_HI_LO
;
1242 if (num_components
>= 3)
1243 conf
|= TLB_VEC_SIZE_4_F16
;
1245 conf
|= TLB_VEC_SIZE_2_F16
;
1249 int num_samples
= c
->msaa_per_sample_output
? V3D_MAX_SAMPLES
: 1;
1250 for (int i
= 0; i
< num_samples
; i
++) {
1251 struct qreg
*color
= c
->msaa_per_sample_output
?
1252 &c
->sample_colors
[(rt
* V3D_MAX_SAMPLES
+ i
) * 4] :
1253 &c
->outputs
[var
->data
.driver_location
* 4];
1255 struct qreg r
= color
[0];
1256 struct qreg g
= color
[1];
1257 struct qreg b
= color
[2];
1258 struct qreg a
= color
[3];
1260 if (c
->fs_key
->swap_color_rb
& (1 << rt
)) {
1265 if (c
->fs_key
->sample_alpha_to_one
)
1266 a
= vir_uniform_f(c
, 1.0);
1268 if (is_32b_tlb_format
) {
1270 inst
= vir_MOV_dest(c
, tlbu_reg
, r
);
1272 vir_get_uniform_index(c
,
1276 inst
= vir_MOV_dest(c
, tlb_reg
, r
);
1279 if (num_components
>= 2)
1280 vir_MOV_dest(c
, tlb_reg
, g
);
1281 if (num_components
>= 3)
1282 vir_MOV_dest(c
, tlb_reg
, b
);
1283 if (num_components
>= 4)
1284 vir_MOV_dest(c
, tlb_reg
, a
);
1286 inst
= vir_VFPACK_dest(c
, tlb_reg
, r
, g
);
1287 if (conf
!= ~0 && i
== 0) {
1288 inst
->dst
= tlbu_reg
;
1290 vir_get_uniform_index(c
,
1295 if (num_components
>= 3)
1296 inst
= vir_VFPACK_dest(c
, tlb_reg
, b
, a
);
1302 emit_frag_end(struct v3d_compile
*c
)
1305 if (c->output_sample_mask_index != -1) {
1306 vir_MS_MASK(c, c->outputs[c->output_sample_mask_index]);
1310 bool has_any_tlb_color_write
= false;
1311 for (int rt
= 0; rt
< V3D_MAX_DRAW_BUFFERS
; rt
++) {
1312 if (c
->fs_key
->cbufs
& (1 << rt
) && c
->output_color_var
[rt
])
1313 has_any_tlb_color_write
= true;
1316 if (c
->fs_key
->sample_alpha_to_coverage
&& c
->output_color_var
[0]) {
1317 struct nir_variable
*var
= c
->output_color_var
[0];
1318 struct qreg
*color
= &c
->outputs
[var
->data
.driver_location
* 4];
1320 vir_SETMSF_dest(c
, vir_nop_reg(),
1323 vir_FTOC(c
, color
[3])));
1326 struct qreg tlbu_reg
= vir_magic_reg(V3D_QPU_WADDR_TLBU
);
1327 if (c
->output_position_index
!= -1) {
1328 struct qinst
*inst
= vir_MOV_dest(c
, tlbu_reg
,
1329 c
->outputs
[c
->output_position_index
]);
1330 uint8_t tlb_specifier
= TLB_TYPE_DEPTH
;
1332 if (c
->devinfo
->ver
>= 42) {
1333 tlb_specifier
|= (TLB_V42_DEPTH_TYPE_PER_PIXEL
|
1334 TLB_SAMPLE_MODE_PER_PIXEL
);
1336 tlb_specifier
|= TLB_DEPTH_TYPE_PER_PIXEL
;
1338 inst
->uniform
= vir_get_uniform_index(c
, QUNIFORM_CONSTANT
,
1342 } else if (c
->s
->info
.fs
.uses_discard
||
1343 !c
->s
->info
.fs
.early_fragment_tests
||
1344 c
->fs_key
->sample_alpha_to_coverage
||
1345 !has_any_tlb_color_write
) {
1346 /* Emit passthrough Z if it needed to be delayed until shader
1347 * end due to potential discards.
1349 * Since (single-threaded) fragment shaders always need a TLB
1350 * write, emit passthrouh Z if we didn't have any color
1351 * buffers and flag us as potentially discarding, so that we
1352 * can use Z as the TLB write.
1354 c
->s
->info
.fs
.uses_discard
= true;
1356 struct qinst
*inst
= vir_MOV_dest(c
, tlbu_reg
,
1358 uint8_t tlb_specifier
= TLB_TYPE_DEPTH
;
1360 if (c
->devinfo
->ver
>= 42) {
1361 /* The spec says the PER_PIXEL flag is ignored for
1362 * invariant writes, but the simulator demands it.
1364 tlb_specifier
|= (TLB_V42_DEPTH_TYPE_INVARIANT
|
1365 TLB_SAMPLE_MODE_PER_PIXEL
);
1367 tlb_specifier
|= TLB_DEPTH_TYPE_INVARIANT
;
1370 inst
->uniform
= vir_get_uniform_index(c
,
1377 /* XXX: Performance improvement: Merge Z write and color writes TLB
1380 for (int rt
= 0; rt
< V3D_MAX_DRAW_BUFFERS
; rt
++)
1381 vir_emit_tlb_color_write(c
, rt
);
1385 vir_VPM_WRITE_indirect(struct v3d_compile
*c
,
1387 struct qreg vpm_index
)
1389 assert(c
->devinfo
->ver
>= 40);
1390 vir_STVPMV(c
, vpm_index
, val
);
1394 vir_VPM_WRITE(struct v3d_compile
*c
, struct qreg val
, uint32_t vpm_index
)
1396 if (c
->devinfo
->ver
>= 40) {
1397 vir_VPM_WRITE_indirect(c
, val
, vir_uniform_ui(c
, vpm_index
));
1399 /* XXX: v3d33_vir_vpm_write_setup(c); */
1400 vir_MOV_dest(c
, vir_reg(QFILE_MAGIC
, V3D_QPU_WADDR_VPM
), val
);
1405 emit_vert_end(struct v3d_compile
*c
)
1407 /* GFXH-1684: VPM writes need to be complete by the end of the shader.
1409 if (c
->devinfo
->ver
>= 40 && c
->devinfo
->ver
<= 42)
1414 emit_geom_end(struct v3d_compile
*c
)
1416 /* GFXH-1684: VPM writes need to be complete by the end of the shader.
1418 if (c
->devinfo
->ver
>= 40 && c
->devinfo
->ver
<= 42)
1423 v3d_optimize_nir(struct nir_shader
*s
)
1426 unsigned lower_flrp
=
1427 (s
->options
->lower_flrp16
? 16 : 0) |
1428 (s
->options
->lower_flrp32
? 32 : 0) |
1429 (s
->options
->lower_flrp64
? 64 : 0);
1434 NIR_PASS_V(s
, nir_lower_vars_to_ssa
);
1435 NIR_PASS(progress
, s
, nir_lower_alu_to_scalar
, NULL
, NULL
);
1436 NIR_PASS(progress
, s
, nir_lower_phis_to_scalar
);
1437 NIR_PASS(progress
, s
, nir_copy_prop
);
1438 NIR_PASS(progress
, s
, nir_opt_remove_phis
);
1439 NIR_PASS(progress
, s
, nir_opt_dce
);
1440 NIR_PASS(progress
, s
, nir_opt_dead_cf
);
1441 NIR_PASS(progress
, s
, nir_opt_cse
);
1442 NIR_PASS(progress
, s
, nir_opt_peephole_select
, 8, true, true);
1443 NIR_PASS(progress
, s
, nir_opt_algebraic
);
1444 NIR_PASS(progress
, s
, nir_opt_constant_folding
);
1446 if (lower_flrp
!= 0) {
1447 bool lower_flrp_progress
= false;
1449 NIR_PASS(lower_flrp_progress
, s
, nir_lower_flrp
,
1451 false /* always_precise */,
1452 s
->options
->lower_ffma
);
1453 if (lower_flrp_progress
) {
1454 NIR_PASS(progress
, s
, nir_opt_constant_folding
);
1458 /* Nothing should rematerialize any flrps, so we only
1459 * need to do this lowering once.
1464 NIR_PASS(progress
, s
, nir_opt_undef
);
1467 NIR_PASS(progress
, s
, nir_opt_move
, nir_move_load_ubo
);
1471 driver_location_compare(const void *in_a
, const void *in_b
)
1473 const nir_variable
*const *a
= in_a
;
1474 const nir_variable
*const *b
= in_b
;
1476 if ((*a
)->data
.driver_location
== (*b
)->data
.driver_location
)
1477 return (*a
)->data
.location_frac
- (*b
)->data
.location_frac
;
1479 return (*a
)->data
.driver_location
- (*b
)->data
.driver_location
;
1483 ntq_emit_vpm_read(struct v3d_compile
*c
,
1484 uint32_t *num_components_queued
,
1485 uint32_t *remaining
,
1488 struct qreg vpm
= vir_reg(QFILE_VPM
, vpm_index
);
1490 if (c
->devinfo
->ver
>= 40 ) {
1491 return vir_LDVPMV_IN(c
,
1493 (*num_components_queued
)++));
1496 if (*num_components_queued
!= 0) {
1497 (*num_components_queued
)--;
1498 return vir_MOV(c
, vpm
);
1501 uint32_t num_components
= MIN2(*remaining
, 32);
1503 v3d33_vir_vpm_read_setup(c
, num_components
);
1505 *num_components_queued
= num_components
- 1;
1506 *remaining
-= num_components
;
1508 return vir_MOV(c
, vpm
);
1512 ntq_setup_vs_inputs(struct v3d_compile
*c
)
1514 /* Figure out how many components of each vertex attribute the shader
1515 * uses. Each variable should have been split to individual
1516 * components and unused ones DCEed. The vertex fetcher will load
1517 * from the start of the attribute to the number of components we
1518 * declare we need in c->vattr_sizes[].
1520 nir_foreach_shader_in_variable(var
, c
->s
) {
1521 /* No VS attribute array support. */
1522 assert(MAX2(glsl_get_length(var
->type
), 1) == 1);
1524 unsigned loc
= var
->data
.driver_location
;
1525 int start_component
= var
->data
.location_frac
;
1526 int num_components
= glsl_get_components(var
->type
);
1528 c
->vattr_sizes
[loc
] = MAX2(c
->vattr_sizes
[loc
],
1529 start_component
+ num_components
);
1532 unsigned num_components
= 0;
1533 uint32_t vpm_components_queued
= 0;
1534 bool uses_iid
= c
->s
->info
.system_values_read
&
1535 (1ull << SYSTEM_VALUE_INSTANCE_ID
);
1536 bool uses_vid
= c
->s
->info
.system_values_read
&
1537 (1ull << SYSTEM_VALUE_VERTEX_ID
);
1538 num_components
+= uses_iid
;
1539 num_components
+= uses_vid
;
1541 for (int i
= 0; i
< ARRAY_SIZE(c
->vattr_sizes
); i
++)
1542 num_components
+= c
->vattr_sizes
[i
];
1545 c
->iid
= ntq_emit_vpm_read(c
, &vpm_components_queued
,
1546 &num_components
, ~0);
1550 c
->vid
= ntq_emit_vpm_read(c
, &vpm_components_queued
,
1551 &num_components
, ~0);
1554 /* The actual loads will happen directly in nir_intrinsic_load_input
1555 * on newer versions.
1557 if (c
->devinfo
->ver
>= 40)
1560 for (int loc
= 0; loc
< ARRAY_SIZE(c
->vattr_sizes
); loc
++) {
1561 resize_qreg_array(c
, &c
->inputs
, &c
->inputs_array_size
,
1564 for (int i
= 0; i
< c
->vattr_sizes
[loc
]; i
++) {
1565 c
->inputs
[loc
* 4 + i
] =
1566 ntq_emit_vpm_read(c
,
1567 &vpm_components_queued
,
1574 if (c
->devinfo
->ver
>= 40) {
1575 assert(vpm_components_queued
== num_components
);
1577 assert(vpm_components_queued
== 0);
1578 assert(num_components
== 0);
1583 program_reads_point_coord(struct v3d_compile
*c
)
1585 nir_foreach_shader_in_variable(var
, c
->s
) {
1586 if (util_varying_is_point_coord(var
->data
.location
,
1587 c
->fs_key
->point_sprite_mask
)) {
1596 get_sorted_input_variables(struct v3d_compile
*c
,
1597 unsigned *num_entries
,
1598 nir_variable
***vars
)
1601 nir_foreach_shader_in_variable(var
, c
->s
)
1604 *vars
= ralloc_array(c
, nir_variable
*, *num_entries
);
1607 nir_foreach_shader_in_variable(var
, c
->s
)
1610 /* Sort the variables so that we emit the input setup in
1611 * driver_location order. This is required for VPM reads, whose data
1612 * is fetched into the VPM in driver_location (TGSI register index)
1615 qsort(*vars
, *num_entries
, sizeof(**vars
), driver_location_compare
);
1619 ntq_setup_gs_inputs(struct v3d_compile
*c
)
1621 nir_variable
**vars
;
1622 unsigned num_entries
;
1623 get_sorted_input_variables(c
, &num_entries
, &vars
);
1625 for (unsigned i
= 0; i
< num_entries
; i
++) {
1626 nir_variable
*var
= vars
[i
];
1628 /* All GS inputs are arrays with as many entries as vertices
1629 * in the input primitive, but here we only care about the
1630 * per-vertex input type.
1632 const struct glsl_type
*type
= glsl_without_array(var
->type
);
1633 unsigned array_len
= MAX2(glsl_get_length(type
), 1);
1634 unsigned loc
= var
->data
.driver_location
;
1636 resize_qreg_array(c
, &c
->inputs
, &c
->inputs_array_size
,
1637 (loc
+ array_len
) * 4);
1639 for (unsigned j
= 0; j
< array_len
; j
++) {
1640 unsigned num_elements
= glsl_get_vector_elements(type
);
1641 for (unsigned k
= 0; k
< num_elements
; k
++) {
1642 unsigned chan
= var
->data
.location_frac
+ k
;
1643 unsigned input_idx
= c
->num_inputs
++;
1644 struct v3d_varying_slot slot
=
1645 v3d_slot_from_slot_and_component(var
->data
.location
+ j
, chan
);
1646 c
->input_slots
[input_idx
] = slot
;
1654 ntq_setup_fs_inputs(struct v3d_compile
*c
)
1656 nir_variable
**vars
;
1657 unsigned num_entries
;
1658 get_sorted_input_variables(c
, &num_entries
, &vars
);
1660 for (unsigned i
= 0; i
< num_entries
; i
++) {
1661 nir_variable
*var
= vars
[i
];
1662 unsigned array_len
= MAX2(glsl_get_length(var
->type
), 1);
1663 unsigned loc
= var
->data
.driver_location
;
1665 resize_qreg_array(c
, &c
->inputs
, &c
->inputs_array_size
,
1666 (loc
+ array_len
) * 4);
1668 if (var
->data
.location
== VARYING_SLOT_POS
) {
1669 emit_fragcoord_input(c
, loc
);
1670 } else if (util_varying_is_point_coord(var
->data
.location
,
1671 c
->fs_key
->point_sprite_mask
)) {
1672 c
->inputs
[loc
* 4 + 0] = c
->point_x
;
1673 c
->inputs
[loc
* 4 + 1] = c
->point_y
;
1674 } else if (var
->data
.compact
) {
1675 for (int j
= 0; j
< array_len
; j
++)
1676 emit_compact_fragment_input(c
, loc
, var
, j
);
1678 for (int j
= 0; j
< array_len
; j
++)
1679 emit_fragment_input(c
, loc
+ j
, var
, j
);
1685 ntq_setup_outputs(struct v3d_compile
*c
)
1687 if (c
->s
->info
.stage
!= MESA_SHADER_FRAGMENT
)
1690 nir_foreach_shader_out_variable(var
, c
->s
) {
1691 unsigned array_len
= MAX2(glsl_get_length(var
->type
), 1);
1692 unsigned loc
= var
->data
.driver_location
* 4;
1694 assert(array_len
== 1);
1697 for (int i
= 0; i
< 4 - var
->data
.location_frac
; i
++) {
1698 add_output(c
, loc
+ var
->data
.location_frac
+ i
,
1700 var
->data
.location_frac
+ i
);
1703 switch (var
->data
.location
) {
1704 case FRAG_RESULT_COLOR
:
1705 c
->output_color_var
[0] = var
;
1706 c
->output_color_var
[1] = var
;
1707 c
->output_color_var
[2] = var
;
1708 c
->output_color_var
[3] = var
;
1710 case FRAG_RESULT_DATA0
:
1711 case FRAG_RESULT_DATA1
:
1712 case FRAG_RESULT_DATA2
:
1713 case FRAG_RESULT_DATA3
:
1714 c
->output_color_var
[var
->data
.location
-
1715 FRAG_RESULT_DATA0
] = var
;
1717 case FRAG_RESULT_DEPTH
:
1718 c
->output_position_index
= loc
;
1720 case FRAG_RESULT_SAMPLE_MASK
:
1721 c
->output_sample_mask_index
= loc
;
1728 * Sets up the mapping from nir_register to struct qreg *.
1730 * Each nir_register gets a struct qreg per 32-bit component being stored.
1733 ntq_setup_registers(struct v3d_compile
*c
, struct exec_list
*list
)
1735 foreach_list_typed(nir_register
, nir_reg
, node
, list
) {
1736 unsigned array_len
= MAX2(nir_reg
->num_array_elems
, 1);
1737 struct qreg
*qregs
= ralloc_array(c
->def_ht
, struct qreg
,
1739 nir_reg
->num_components
);
1741 _mesa_hash_table_insert(c
->def_ht
, nir_reg
, qregs
);
1743 for (int i
= 0; i
< array_len
* nir_reg
->num_components
; i
++)
1744 qregs
[i
] = vir_get_temp(c
);
1749 ntq_emit_load_const(struct v3d_compile
*c
, nir_load_const_instr
*instr
)
1751 /* XXX perf: Experiment with using immediate loads to avoid having
1752 * these end up in the uniform stream. Watch out for breaking the
1753 * small immediates optimization in the process!
1755 struct qreg
*qregs
= ntq_init_ssa_def(c
, &instr
->def
);
1756 for (int i
= 0; i
< instr
->def
.num_components
; i
++)
1757 qregs
[i
] = vir_uniform_ui(c
, instr
->value
[i
].u32
);
1759 _mesa_hash_table_insert(c
->def_ht
, &instr
->def
, qregs
);
1763 ntq_emit_ssa_undef(struct v3d_compile
*c
, nir_ssa_undef_instr
*instr
)
1765 struct qreg
*qregs
= ntq_init_ssa_def(c
, &instr
->def
);
1767 /* VIR needs there to be *some* value, so pick 0 (same as for
1768 * ntq_setup_registers().
1770 for (int i
= 0; i
< instr
->def
.num_components
; i
++)
1771 qregs
[i
] = vir_uniform_ui(c
, 0);
1775 ntq_emit_image_size(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
1777 unsigned image_index
= nir_src_as_uint(instr
->src
[0]);
1778 bool is_array
= nir_intrinsic_image_array(instr
);
1780 ntq_store_dest(c
, &instr
->dest
, 0,
1781 vir_uniform(c
, QUNIFORM_IMAGE_WIDTH
, image_index
));
1782 if (instr
->num_components
> 1) {
1783 ntq_store_dest(c
, &instr
->dest
, 1,
1785 instr
->num_components
== 2 && is_array
?
1786 QUNIFORM_IMAGE_ARRAY_SIZE
:
1787 QUNIFORM_IMAGE_HEIGHT
,
1790 if (instr
->num_components
> 2) {
1791 ntq_store_dest(c
, &instr
->dest
, 2,
1794 QUNIFORM_IMAGE_ARRAY_SIZE
:
1795 QUNIFORM_IMAGE_DEPTH
,
1801 vir_emit_tlb_color_read(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
1803 assert(c
->s
->info
.stage
== MESA_SHADER_FRAGMENT
);
1805 int rt
= nir_src_as_uint(instr
->src
[0]);
1806 assert(rt
< V3D_MAX_DRAW_BUFFERS
);
1808 int sample_index
= nir_intrinsic_base(instr
) ;
1809 assert(sample_index
< V3D_MAX_SAMPLES
);
1811 int component
= nir_intrinsic_component(instr
);
1812 assert(component
< 4);
1814 /* We need to emit our TLB reads after we have acquired the scoreboard
1815 * lock, or the GPU will hang. Usually, we do our scoreboard locking on
1816 * the last thread switch to improve parallelism, however, that is only
1817 * guaranteed to happen before the tlb color writes.
1819 * To fix that, we make sure we always emit a thread switch before the
1820 * first tlb color read. If that happens to be the last thread switch
1821 * we emit, then everything is fine, but otherwsie, if any code after
1822 * this point needs to emit additional thread switches, then we will
1823 * switch the strategy to locking the scoreboard on the first thread
1824 * switch instead -- see vir_emit_thrsw().
1826 if (!c
->emitted_tlb_load
) {
1827 if (!c
->last_thrsw_at_top_level
) {
1828 assert(c
->devinfo
->ver
>= 41);
1832 c
->emitted_tlb_load
= true;
1835 struct qreg
*color_reads_for_sample
=
1836 &c
->color_reads
[(rt
* V3D_MAX_SAMPLES
+ sample_index
) * 4];
1838 if (color_reads_for_sample
[component
].file
== QFILE_NULL
) {
1839 enum pipe_format rt_format
= c
->fs_key
->color_fmt
[rt
].format
;
1840 int num_components
=
1841 util_format_get_nr_components(rt_format
);
1843 const bool swap_rb
= c
->fs_key
->swap_color_rb
& (1 << rt
);
1845 num_components
= MAX2(num_components
, 3);
1847 nir_variable
*var
= c
->output_color_var
[rt
];
1848 enum glsl_base_type type
= glsl_get_base_type(var
->type
);
1850 bool is_int_format
= type
== GLSL_TYPE_INT
||
1851 type
== GLSL_TYPE_UINT
;
1853 bool is_32b_tlb_format
= is_int_format
||
1854 (c
->fs_key
->f32_color_rb
& (1 << rt
));
1856 int num_samples
= c
->fs_key
->msaa
? V3D_MAX_SAMPLES
: 1;
1858 uint32_t conf
= 0xffffff00;
1859 conf
|= c
->fs_key
->msaa
? TLB_SAMPLE_MODE_PER_SAMPLE
:
1860 TLB_SAMPLE_MODE_PER_PIXEL
;
1861 conf
|= (7 - rt
) << TLB_RENDER_TARGET_SHIFT
;
1863 if (is_32b_tlb_format
) {
1864 /* The F32 vs I32 distinction was dropped in 4.2. */
1865 conf
|= (c
->devinfo
->ver
< 42 && is_int_format
) ?
1866 TLB_TYPE_I32_COLOR
: TLB_TYPE_F32_COLOR
;
1868 conf
|= ((num_components
- 1) <<
1869 TLB_VEC_SIZE_MINUS_1_SHIFT
);
1871 conf
|= TLB_TYPE_F16_COLOR
;
1872 conf
|= TLB_F16_SWAP_HI_LO
;
1874 if (num_components
>= 3)
1875 conf
|= TLB_VEC_SIZE_4_F16
;
1877 conf
|= TLB_VEC_SIZE_2_F16
;
1881 for (int i
= 0; i
< num_samples
; i
++) {
1882 struct qreg r
, g
, b
, a
;
1883 if (is_32b_tlb_format
) {
1884 r
= conf
!= 0xffffffff && i
== 0?
1885 vir_TLBU_COLOR_READ(c
, conf
) :
1886 vir_TLB_COLOR_READ(c
);
1887 if (num_components
>= 2)
1888 g
= vir_TLB_COLOR_READ(c
);
1889 if (num_components
>= 3)
1890 b
= vir_TLB_COLOR_READ(c
);
1891 if (num_components
>= 4)
1892 a
= vir_TLB_COLOR_READ(c
);
1894 struct qreg rg
= conf
!= 0xffffffff && i
== 0 ?
1895 vir_TLBU_COLOR_READ(c
, conf
) :
1896 vir_TLB_COLOR_READ(c
);
1897 r
= vir_FMOV(c
, rg
);
1898 vir_set_unpack(c
->defs
[r
.index
], 0,
1900 g
= vir_FMOV(c
, rg
);
1901 vir_set_unpack(c
->defs
[g
.index
], 0,
1904 if (num_components
> 2) {
1905 struct qreg ba
= vir_TLB_COLOR_READ(c
);
1906 b
= vir_FMOV(c
, ba
);
1907 vir_set_unpack(c
->defs
[b
.index
], 0,
1909 a
= vir_FMOV(c
, ba
);
1910 vir_set_unpack(c
->defs
[a
.index
], 0,
1915 struct qreg
*color_reads
=
1916 &c
->color_reads
[(rt
* V3D_MAX_SAMPLES
+ i
) * 4];
1918 color_reads
[0] = swap_rb
? b
: r
;
1919 if (num_components
>= 2)
1921 if (num_components
>= 3)
1922 color_reads
[2] = swap_rb
? r
: b
;
1923 if (num_components
>= 4)
1928 assert(color_reads_for_sample
[component
].file
!= QFILE_NULL
);
1929 ntq_store_dest(c
, &instr
->dest
, 0,
1930 vir_MOV(c
, color_reads_for_sample
[component
]));
1934 ntq_emit_load_uniform(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
1936 if (nir_src_is_const(instr
->src
[0])) {
1937 int offset
= (nir_intrinsic_base(instr
) +
1938 nir_src_as_uint(instr
->src
[0]));
1939 assert(offset
% 4 == 0);
1940 /* We need dwords */
1941 offset
= offset
/ 4;
1942 for (int i
= 0; i
< instr
->num_components
; i
++) {
1943 ntq_store_dest(c
, &instr
->dest
, i
,
1944 vir_uniform(c
, QUNIFORM_UNIFORM
,
1948 ntq_emit_tmu_general(c
, instr
, false);
1953 ntq_emit_load_input(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
1955 /* XXX: Use ldvpmv (uniform offset) or ldvpmd (non-uniform offset)
1956 * and enable PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR.
1959 nir_intrinsic_base(instr
) + nir_src_as_uint(instr
->src
[0]);
1961 if (c
->s
->info
.stage
!= MESA_SHADER_FRAGMENT
&& c
->devinfo
->ver
>= 40) {
1962 /* Emit the LDVPM directly now, rather than at the top
1963 * of the shader like we did for V3D 3.x (which needs
1964 * vpmsetup when not just taking the next offset).
1966 * Note that delaying like this may introduce stalls,
1967 * as LDVPMV takes a minimum of 1 instruction but may
1968 * be slower if the VPM unit is busy with another QPU.
1971 if (c
->s
->info
.system_values_read
&
1972 (1ull << SYSTEM_VALUE_INSTANCE_ID
)) {
1975 if (c
->s
->info
.system_values_read
&
1976 (1ull << SYSTEM_VALUE_VERTEX_ID
)) {
1979 for (int i
= 0; i
< offset
; i
++)
1980 index
+= c
->vattr_sizes
[i
];
1981 index
+= nir_intrinsic_component(instr
);
1982 for (int i
= 0; i
< instr
->num_components
; i
++) {
1983 struct qreg vpm_offset
= vir_uniform_ui(c
, index
++);
1984 ntq_store_dest(c
, &instr
->dest
, i
,
1985 vir_LDVPMV_IN(c
, vpm_offset
));
1988 for (int i
= 0; i
< instr
->num_components
; i
++) {
1989 int comp
= nir_intrinsic_component(instr
) + i
;
1990 ntq_store_dest(c
, &instr
->dest
, i
,
1991 vir_MOV(c
, c
->inputs
[offset
* 4 + comp
]));
1997 ntq_emit_per_sample_color_write(struct v3d_compile
*c
,
1998 nir_intrinsic_instr
*instr
)
2000 assert(instr
->intrinsic
== nir_intrinsic_store_tlb_sample_color_v3d
);
2002 unsigned rt
= nir_src_as_uint(instr
->src
[1]);
2003 assert(rt
< V3D_MAX_DRAW_BUFFERS
);
2005 unsigned sample_idx
= nir_intrinsic_base(instr
);
2006 assert(sample_idx
< V3D_MAX_SAMPLES
);
2008 unsigned offset
= (rt
* V3D_MAX_SAMPLES
+ sample_idx
) * 4;
2009 for (int i
= 0; i
< instr
->num_components
; i
++) {
2010 c
->sample_colors
[offset
+ i
] =
2011 vir_MOV(c
, ntq_get_src(c
, instr
->src
[0], i
));
2016 ntq_emit_color_write(struct v3d_compile
*c
,
2017 nir_intrinsic_instr
*instr
)
2019 unsigned offset
= (nir_intrinsic_base(instr
) +
2020 nir_src_as_uint(instr
->src
[1])) * 4 +
2021 nir_intrinsic_component(instr
);
2022 for (int i
= 0; i
< instr
->num_components
; i
++) {
2023 c
->outputs
[offset
+ i
] =
2024 vir_MOV(c
, ntq_get_src(c
, instr
->src
[0], i
));
2029 emit_store_output_gs(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
2031 assert(instr
->num_components
== 1);
2033 struct qreg offset
= ntq_get_src(c
, instr
->src
[1], 0);
2035 uint32_t base_offset
= nir_intrinsic_base(instr
);
2038 offset
= vir_ADD(c
, vir_uniform_ui(c
, base_offset
), offset
);
2040 /* Usually, for VS or FS, we only emit outputs once at program end so
2041 * our VPM writes are never in non-uniform control flow, but this
2042 * is not true for GS, where we are emitting multiple vertices.
2044 if (vir_in_nonuniform_control_flow(c
)) {
2045 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
2049 struct qreg val
= ntq_get_src(c
, instr
->src
[0], 0);
2051 /* The offset isn’t necessarily dynamically uniform for a geometry
2052 * shader. This can happen if the shader sometimes doesn’t emit one of
2053 * the vertices. In that case subsequent vertices will be written to
2054 * different offsets in the VPM and we need to use the scatter write
2055 * instruction to have a different offset for each lane.
2057 if (nir_src_is_dynamically_uniform(instr
->src
[1]))
2058 vir_VPM_WRITE_indirect(c
, val
, offset
);
2060 vir_STVPMD(c
, offset
, val
);
2062 if (vir_in_nonuniform_control_flow(c
)) {
2063 struct qinst
*last_inst
=
2064 (struct qinst
*)c
->cur_block
->instructions
.prev
;
2065 vir_set_cond(last_inst
, V3D_QPU_COND_IFA
);
2070 ntq_emit_store_output(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
2072 /* XXX perf: Use stvpmv with uniform non-constant offsets and
2073 * stvpmd with non-uniform offsets and enable
2074 * PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR.
2076 if (c
->s
->info
.stage
== MESA_SHADER_FRAGMENT
) {
2077 ntq_emit_color_write(c
, instr
);
2078 } else if (c
->s
->info
.stage
== MESA_SHADER_GEOMETRY
) {
2079 emit_store_output_gs(c
, instr
);
2081 assert(c
->s
->info
.stage
== MESA_SHADER_VERTEX
);
2082 assert(instr
->num_components
== 1);
2085 ntq_get_src(c
, instr
->src
[0], 0),
2086 nir_intrinsic_base(instr
));
2091 ntq_emit_intrinsic(struct v3d_compile
*c
, nir_intrinsic_instr
*instr
)
2093 switch (instr
->intrinsic
) {
2094 case nir_intrinsic_load_uniform
:
2095 ntq_emit_load_uniform(c
, instr
);
2098 case nir_intrinsic_load_ubo
:
2099 ntq_emit_tmu_general(c
, instr
, false);
2102 case nir_intrinsic_ssbo_atomic_add
:
2103 case nir_intrinsic_ssbo_atomic_imin
:
2104 case nir_intrinsic_ssbo_atomic_umin
:
2105 case nir_intrinsic_ssbo_atomic_imax
:
2106 case nir_intrinsic_ssbo_atomic_umax
:
2107 case nir_intrinsic_ssbo_atomic_and
:
2108 case nir_intrinsic_ssbo_atomic_or
:
2109 case nir_intrinsic_ssbo_atomic_xor
:
2110 case nir_intrinsic_ssbo_atomic_exchange
:
2111 case nir_intrinsic_ssbo_atomic_comp_swap
:
2112 case nir_intrinsic_load_ssbo
:
2113 case nir_intrinsic_store_ssbo
:
2114 ntq_emit_tmu_general(c
, instr
, false);
2117 case nir_intrinsic_shared_atomic_add
:
2118 case nir_intrinsic_shared_atomic_imin
:
2119 case nir_intrinsic_shared_atomic_umin
:
2120 case nir_intrinsic_shared_atomic_imax
:
2121 case nir_intrinsic_shared_atomic_umax
:
2122 case nir_intrinsic_shared_atomic_and
:
2123 case nir_intrinsic_shared_atomic_or
:
2124 case nir_intrinsic_shared_atomic_xor
:
2125 case nir_intrinsic_shared_atomic_exchange
:
2126 case nir_intrinsic_shared_atomic_comp_swap
:
2127 case nir_intrinsic_load_shared
:
2128 case nir_intrinsic_store_shared
:
2129 case nir_intrinsic_load_scratch
:
2130 case nir_intrinsic_store_scratch
:
2131 ntq_emit_tmu_general(c
, instr
, true);
2134 case nir_intrinsic_image_load
:
2135 case nir_intrinsic_image_store
:
2136 case nir_intrinsic_image_atomic_add
:
2137 case nir_intrinsic_image_atomic_imin
:
2138 case nir_intrinsic_image_atomic_umin
:
2139 case nir_intrinsic_image_atomic_imax
:
2140 case nir_intrinsic_image_atomic_umax
:
2141 case nir_intrinsic_image_atomic_and
:
2142 case nir_intrinsic_image_atomic_or
:
2143 case nir_intrinsic_image_atomic_xor
:
2144 case nir_intrinsic_image_atomic_exchange
:
2145 case nir_intrinsic_image_atomic_comp_swap
:
2146 v3d40_vir_emit_image_load_store(c
, instr
);
2149 case nir_intrinsic_get_buffer_size
:
2150 ntq_store_dest(c
, &instr
->dest
, 0,
2151 vir_uniform(c
, QUNIFORM_GET_BUFFER_SIZE
,
2152 nir_src_as_uint(instr
->src
[0])));
2155 case nir_intrinsic_load_user_clip_plane
:
2156 for (int i
= 0; i
< nir_intrinsic_dest_components(instr
); i
++) {
2157 ntq_store_dest(c
, &instr
->dest
, i
,
2158 vir_uniform(c
, QUNIFORM_USER_CLIP_PLANE
,
2159 nir_intrinsic_ucp_id(instr
) *
2164 case nir_intrinsic_load_viewport_x_scale
:
2165 ntq_store_dest(c
, &instr
->dest
, 0,
2166 vir_uniform(c
, QUNIFORM_VIEWPORT_X_SCALE
, 0));
2169 case nir_intrinsic_load_viewport_y_scale
:
2170 ntq_store_dest(c
, &instr
->dest
, 0,
2171 vir_uniform(c
, QUNIFORM_VIEWPORT_Y_SCALE
, 0));
2174 case nir_intrinsic_load_viewport_z_scale
:
2175 ntq_store_dest(c
, &instr
->dest
, 0,
2176 vir_uniform(c
, QUNIFORM_VIEWPORT_Z_SCALE
, 0));
2179 case nir_intrinsic_load_viewport_z_offset
:
2180 ntq_store_dest(c
, &instr
->dest
, 0,
2181 vir_uniform(c
, QUNIFORM_VIEWPORT_Z_OFFSET
, 0));
2184 case nir_intrinsic_load_alpha_ref_float
:
2185 ntq_store_dest(c
, &instr
->dest
, 0,
2186 vir_uniform(c
, QUNIFORM_ALPHA_REF
, 0));
2189 case nir_intrinsic_load_line_coord
:
2190 ntq_store_dest(c
, &instr
->dest
, 0, vir_MOV(c
, c
->line_x
));
2193 case nir_intrinsic_load_line_width
:
2194 ntq_store_dest(c
, &instr
->dest
, 0,
2195 vir_uniform(c
, QUNIFORM_LINE_WIDTH
, 0));
2198 case nir_intrinsic_load_aa_line_width
:
2199 ntq_store_dest(c
, &instr
->dest
, 0,
2200 vir_uniform(c
, QUNIFORM_AA_LINE_WIDTH
, 0));
2203 case nir_intrinsic_load_sample_mask_in
:
2204 ntq_store_dest(c
, &instr
->dest
, 0, vir_MSF(c
));
2207 case nir_intrinsic_load_helper_invocation
:
2208 vir_set_pf(vir_MSF_dest(c
, vir_nop_reg()), V3D_QPU_PF_PUSHZ
);
2209 ntq_store_dest(c
, &instr
->dest
, 0,
2210 vir_MOV(c
, vir_SEL(c
, V3D_QPU_COND_IFA
,
2211 vir_uniform_ui(c
, ~0),
2212 vir_uniform_ui(c
, 0))));
2215 case nir_intrinsic_load_front_face
:
2216 /* The register contains 0 (front) or 1 (back), and we need to
2217 * turn it into a NIR bool where true means front.
2219 ntq_store_dest(c
, &instr
->dest
, 0,
2221 vir_uniform_ui(c
, -1),
2225 case nir_intrinsic_load_instance_id
:
2226 ntq_store_dest(c
, &instr
->dest
, 0, vir_MOV(c
, c
->iid
));
2229 case nir_intrinsic_load_vertex_id
:
2230 ntq_store_dest(c
, &instr
->dest
, 0, vir_MOV(c
, c
->vid
));
2233 case nir_intrinsic_load_tlb_color_v3d
:
2234 vir_emit_tlb_color_read(c
, instr
);
2237 case nir_intrinsic_load_input
:
2238 ntq_emit_load_input(c
, instr
);
2241 case nir_intrinsic_store_tlb_sample_color_v3d
:
2242 ntq_emit_per_sample_color_write(c
, instr
);
2245 case nir_intrinsic_store_output
:
2246 ntq_emit_store_output(c
, instr
);
2249 case nir_intrinsic_image_size
:
2250 ntq_emit_image_size(c
, instr
);
2253 case nir_intrinsic_discard
:
2254 if (vir_in_nonuniform_control_flow(c
)) {
2255 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
2257 vir_set_cond(vir_SETMSF_dest(c
, vir_nop_reg(),
2258 vir_uniform_ui(c
, 0)),
2261 vir_SETMSF_dest(c
, vir_nop_reg(),
2262 vir_uniform_ui(c
, 0));
2266 case nir_intrinsic_discard_if
: {
2267 enum v3d_qpu_cond cond
= ntq_emit_bool_to_cond(c
, instr
->src
[0]);
2269 if (vir_in_nonuniform_control_flow(c
)) {
2270 struct qinst
*exec_flag
= vir_MOV_dest(c
, vir_nop_reg(),
2272 if (cond
== V3D_QPU_COND_IFA
) {
2273 vir_set_uf(exec_flag
, V3D_QPU_UF_ANDZ
);
2275 vir_set_uf(exec_flag
, V3D_QPU_UF_NORNZ
);
2276 cond
= V3D_QPU_COND_IFA
;
2280 vir_set_cond(vir_SETMSF_dest(c
, vir_nop_reg(),
2281 vir_uniform_ui(c
, 0)), cond
);
2286 case nir_intrinsic_memory_barrier
:
2287 case nir_intrinsic_memory_barrier_buffer
:
2288 case nir_intrinsic_memory_barrier_image
:
2289 case nir_intrinsic_memory_barrier_shared
:
2290 case nir_intrinsic_memory_barrier_tcs_patch
:
2291 case nir_intrinsic_group_memory_barrier
:
2292 /* We don't do any instruction scheduling of these NIR
2293 * instructions between each other, so we just need to make
2294 * sure that the TMU operations before the barrier are flushed
2295 * before the ones after the barrier. That is currently
2296 * handled by having a THRSW in each of them and a LDTMU
2297 * series or a TMUWT after.
2301 case nir_intrinsic_control_barrier
:
2302 /* Emit a TSY op to get all invocations in the workgroup
2303 * (actually supergroup) to block until the last invocation
2304 * reaches the TSY op.
2306 if (c
->devinfo
->ver
>= 42) {
2307 vir_BARRIERID_dest(c
, vir_reg(QFILE_MAGIC
,
2308 V3D_QPU_WADDR_SYNCB
));
2310 struct qinst
*sync
=
2311 vir_BARRIERID_dest(c
,
2312 vir_reg(QFILE_MAGIC
,
2313 V3D_QPU_WADDR_SYNCU
));
2315 vir_get_uniform_index(c
, QUNIFORM_CONSTANT
,
2317 V3D_TSY_WAIT_INC_CHECK
);
2321 /* The blocking of a TSY op only happens at the next thread
2322 * switch. No texturing may be outstanding at the time of a
2323 * TSY blocking operation.
2328 case nir_intrinsic_load_num_work_groups
:
2329 for (int i
= 0; i
< 3; i
++) {
2330 ntq_store_dest(c
, &instr
->dest
, i
,
2331 vir_uniform(c
, QUNIFORM_NUM_WORK_GROUPS
,
2336 case nir_intrinsic_load_local_invocation_index
:
2337 ntq_store_dest(c
, &instr
->dest
, 0,
2338 vir_SHR(c
, c
->cs_payload
[1],
2339 vir_uniform_ui(c
, 32 - c
->local_invocation_index_bits
)));
2342 case nir_intrinsic_load_work_group_id
:
2343 ntq_store_dest(c
, &instr
->dest
, 0,
2344 vir_AND(c
, c
->cs_payload
[0],
2345 vir_uniform_ui(c
, 0xffff)));
2346 ntq_store_dest(c
, &instr
->dest
, 1,
2347 vir_SHR(c
, c
->cs_payload
[0],
2348 vir_uniform_ui(c
, 16)));
2349 ntq_store_dest(c
, &instr
->dest
, 2,
2350 vir_AND(c
, c
->cs_payload
[1],
2351 vir_uniform_ui(c
, 0xffff)));
2354 case nir_intrinsic_load_subgroup_id
:
2355 ntq_store_dest(c
, &instr
->dest
, 0, vir_EIDX(c
));
2358 case nir_intrinsic_load_per_vertex_input
: {
2359 /* col: vertex index, row = varying index */
2360 struct qreg col
= ntq_get_src(c
, instr
->src
[0], 0);
2361 uint32_t row_idx
= nir_intrinsic_base(instr
) * 4 +
2362 nir_intrinsic_component(instr
);
2363 for (int i
= 0; i
< instr
->num_components
; i
++) {
2364 struct qreg row
= vir_uniform_ui(c
, row_idx
++);
2365 ntq_store_dest(c
, &instr
->dest
, i
,
2366 vir_LDVPMG_IN(c
, row
, col
));
2371 case nir_intrinsic_emit_vertex
:
2372 case nir_intrinsic_end_primitive
:
2373 unreachable("Should have been lowered in v3d_nir_lower_io");
2376 case nir_intrinsic_load_primitive_id
: {
2377 /* gl_PrimitiveIdIn is written by the GBG in the first word of
2378 * VPM output header. According to docs, we should read this
2379 * using ldvpm(v,d)_in (See Table 71).
2381 ntq_store_dest(c
, &instr
->dest
, 0,
2382 vir_LDVPMV_IN(c
, vir_uniform_ui(c
, 0)));
2386 case nir_intrinsic_load_invocation_id
:
2387 ntq_store_dest(c
, &instr
->dest
, 0, vir_IID(c
));
2390 case nir_intrinsic_load_fb_layers_v3d
:
2391 ntq_store_dest(c
, &instr
->dest
, 0,
2392 vir_uniform(c
, QUNIFORM_FB_LAYERS
, 0));
2396 fprintf(stderr
, "Unknown intrinsic: ");
2397 nir_print_instr(&instr
->instr
, stderr
);
2398 fprintf(stderr
, "\n");
2403 /* Clears (activates) the execute flags for any channels whose jump target
2404 * matches this block.
2406 * XXX perf: Could we be using flpush/flpop somehow for our execution channel
2409 * XXX perf: For uniform control flow, we should be able to skip c->execute
2410 * handling entirely.
2413 ntq_activate_execute_for_block(struct v3d_compile
*c
)
2415 vir_set_pf(vir_XOR_dest(c
, vir_nop_reg(),
2416 c
->execute
, vir_uniform_ui(c
, c
->cur_block
->index
)),
2419 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, c
->execute
, vir_uniform_ui(c
, 0));
2423 ntq_emit_uniform_if(struct v3d_compile
*c
, nir_if
*if_stmt
)
2425 nir_block
*nir_else_block
= nir_if_first_else_block(if_stmt
);
2426 bool empty_else_block
=
2427 (nir_else_block
== nir_if_last_else_block(if_stmt
) &&
2428 exec_list_is_empty(&nir_else_block
->instr_list
));
2430 struct qblock
*then_block
= vir_new_block(c
);
2431 struct qblock
*after_block
= vir_new_block(c
);
2432 struct qblock
*else_block
;
2433 if (empty_else_block
)
2434 else_block
= after_block
;
2436 else_block
= vir_new_block(c
);
2438 /* Set up the flags for the IF condition (taking the THEN branch). */
2439 enum v3d_qpu_cond cond
= ntq_emit_bool_to_cond(c
, if_stmt
->condition
);
2442 vir_BRANCH(c
, cond
== V3D_QPU_COND_IFA
?
2443 V3D_QPU_BRANCH_COND_ALLNA
:
2444 V3D_QPU_BRANCH_COND_ALLA
);
2445 vir_link_blocks(c
->cur_block
, else_block
);
2446 vir_link_blocks(c
->cur_block
, then_block
);
2448 /* Process the THEN block. */
2449 vir_set_emit_block(c
, then_block
);
2450 ntq_emit_cf_list(c
, &if_stmt
->then_list
);
2452 if (!empty_else_block
) {
2453 /* At the end of the THEN block, jump to ENDIF */
2454 vir_BRANCH(c
, V3D_QPU_BRANCH_COND_ALWAYS
);
2455 vir_link_blocks(c
->cur_block
, after_block
);
2457 /* Emit the else block. */
2458 vir_set_emit_block(c
, else_block
);
2459 ntq_emit_cf_list(c
, &if_stmt
->else_list
);
2462 vir_link_blocks(c
->cur_block
, after_block
);
2464 vir_set_emit_block(c
, after_block
);
2468 ntq_emit_nonuniform_if(struct v3d_compile
*c
, nir_if
*if_stmt
)
2470 nir_block
*nir_else_block
= nir_if_first_else_block(if_stmt
);
2471 bool empty_else_block
=
2472 (nir_else_block
== nir_if_last_else_block(if_stmt
) &&
2473 exec_list_is_empty(&nir_else_block
->instr_list
));
2475 struct qblock
*then_block
= vir_new_block(c
);
2476 struct qblock
*after_block
= vir_new_block(c
);
2477 struct qblock
*else_block
;
2478 if (empty_else_block
)
2479 else_block
= after_block
;
2481 else_block
= vir_new_block(c
);
2483 bool was_uniform_control_flow
= false;
2484 if (!vir_in_nonuniform_control_flow(c
)) {
2485 c
->execute
= vir_MOV(c
, vir_uniform_ui(c
, 0));
2486 was_uniform_control_flow
= true;
2489 /* Set up the flags for the IF condition (taking the THEN branch). */
2490 enum v3d_qpu_cond cond
= ntq_emit_bool_to_cond(c
, if_stmt
->condition
);
2492 /* Update the flags+cond to mean "Taking the ELSE branch (!cond) and
2493 * was previously active (execute Z) for updating the exec flags.
2495 if (was_uniform_control_flow
) {
2496 cond
= v3d_qpu_cond_invert(cond
);
2498 struct qinst
*inst
= vir_MOV_dest(c
, vir_nop_reg(), c
->execute
);
2499 if (cond
== V3D_QPU_COND_IFA
) {
2500 vir_set_uf(inst
, V3D_QPU_UF_NORNZ
);
2502 vir_set_uf(inst
, V3D_QPU_UF_ANDZ
);
2503 cond
= V3D_QPU_COND_IFA
;
2507 vir_MOV_cond(c
, cond
,
2509 vir_uniform_ui(c
, else_block
->index
));
2511 /* Jump to ELSE if nothing is active for THEN, otherwise fall
2514 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
), V3D_QPU_PF_PUSHZ
);
2515 vir_BRANCH(c
, V3D_QPU_BRANCH_COND_ALLNA
);
2516 vir_link_blocks(c
->cur_block
, else_block
);
2517 vir_link_blocks(c
->cur_block
, then_block
);
2519 /* Process the THEN block. */
2520 vir_set_emit_block(c
, then_block
);
2521 ntq_emit_cf_list(c
, &if_stmt
->then_list
);
2523 if (!empty_else_block
) {
2524 /* Handle the end of the THEN block. First, all currently
2525 * active channels update their execute flags to point to
2528 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
2530 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, c
->execute
,
2531 vir_uniform_ui(c
, after_block
->index
));
2533 /* If everything points at ENDIF, then jump there immediately. */
2534 vir_set_pf(vir_XOR_dest(c
, vir_nop_reg(),
2536 vir_uniform_ui(c
, after_block
->index
)),
2538 vir_BRANCH(c
, V3D_QPU_BRANCH_COND_ALLA
);
2539 vir_link_blocks(c
->cur_block
, after_block
);
2540 vir_link_blocks(c
->cur_block
, else_block
);
2542 vir_set_emit_block(c
, else_block
);
2543 ntq_activate_execute_for_block(c
);
2544 ntq_emit_cf_list(c
, &if_stmt
->else_list
);
2547 vir_link_blocks(c
->cur_block
, after_block
);
2549 vir_set_emit_block(c
, after_block
);
2550 if (was_uniform_control_flow
)
2551 c
->execute
= c
->undef
;
2553 ntq_activate_execute_for_block(c
);
2557 ntq_emit_if(struct v3d_compile
*c
, nir_if
*nif
)
2559 bool was_in_control_flow
= c
->in_control_flow
;
2560 c
->in_control_flow
= true;
2561 if (!vir_in_nonuniform_control_flow(c
) &&
2562 nir_src_is_dynamically_uniform(nif
->condition
)) {
2563 ntq_emit_uniform_if(c
, nif
);
2565 ntq_emit_nonuniform_if(c
, nif
);
2567 c
->in_control_flow
= was_in_control_flow
;
2571 ntq_emit_jump(struct v3d_compile
*c
, nir_jump_instr
*jump
)
2573 switch (jump
->type
) {
2574 case nir_jump_break
:
2575 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
2577 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, c
->execute
,
2578 vir_uniform_ui(c
, c
->loop_break_block
->index
));
2581 case nir_jump_continue
:
2582 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
),
2584 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, c
->execute
,
2585 vir_uniform_ui(c
, c
->loop_cont_block
->index
));
2588 case nir_jump_return
:
2589 unreachable("All returns shouold be lowered\n");
2593 case nir_jump_goto_if
:
2594 unreachable("not supported\n");
2600 ntq_emit_instr(struct v3d_compile
*c
, nir_instr
*instr
)
2602 switch (instr
->type
) {
2603 case nir_instr_type_alu
:
2604 ntq_emit_alu(c
, nir_instr_as_alu(instr
));
2607 case nir_instr_type_intrinsic
:
2608 ntq_emit_intrinsic(c
, nir_instr_as_intrinsic(instr
));
2611 case nir_instr_type_load_const
:
2612 ntq_emit_load_const(c
, nir_instr_as_load_const(instr
));
2615 case nir_instr_type_ssa_undef
:
2616 ntq_emit_ssa_undef(c
, nir_instr_as_ssa_undef(instr
));
2619 case nir_instr_type_tex
:
2620 ntq_emit_tex(c
, nir_instr_as_tex(instr
));
2623 case nir_instr_type_jump
:
2624 ntq_emit_jump(c
, nir_instr_as_jump(instr
));
2628 fprintf(stderr
, "Unknown NIR instr type: ");
2629 nir_print_instr(instr
, stderr
);
2630 fprintf(stderr
, "\n");
2636 ntq_emit_block(struct v3d_compile
*c
, nir_block
*block
)
2638 nir_foreach_instr(instr
, block
) {
2639 ntq_emit_instr(c
, instr
);
2643 static void ntq_emit_cf_list(struct v3d_compile
*c
, struct exec_list
*list
);
2646 ntq_emit_loop(struct v3d_compile
*c
, nir_loop
*loop
)
2648 bool was_in_control_flow
= c
->in_control_flow
;
2649 c
->in_control_flow
= true;
2651 bool was_uniform_control_flow
= false;
2652 if (!vir_in_nonuniform_control_flow(c
)) {
2653 c
->execute
= vir_MOV(c
, vir_uniform_ui(c
, 0));
2654 was_uniform_control_flow
= true;
2657 struct qblock
*save_loop_cont_block
= c
->loop_cont_block
;
2658 struct qblock
*save_loop_break_block
= c
->loop_break_block
;
2660 c
->loop_cont_block
= vir_new_block(c
);
2661 c
->loop_break_block
= vir_new_block(c
);
2663 vir_link_blocks(c
->cur_block
, c
->loop_cont_block
);
2664 vir_set_emit_block(c
, c
->loop_cont_block
);
2665 ntq_activate_execute_for_block(c
);
2667 ntq_emit_cf_list(c
, &loop
->body
);
2669 /* Re-enable any previous continues now, so our ANYA check below
2672 * XXX: Use the .ORZ flags update, instead.
2674 vir_set_pf(vir_XOR_dest(c
,
2677 vir_uniform_ui(c
, c
->loop_cont_block
->index
)),
2679 vir_MOV_cond(c
, V3D_QPU_COND_IFA
, c
->execute
, vir_uniform_ui(c
, 0));
2681 vir_set_pf(vir_MOV_dest(c
, vir_nop_reg(), c
->execute
), V3D_QPU_PF_PUSHZ
);
2683 struct qinst
*branch
= vir_BRANCH(c
, V3D_QPU_BRANCH_COND_ANYA
);
2684 /* Pixels that were not dispatched or have been discarded should not
2685 * contribute to looping again.
2687 branch
->qpu
.branch
.msfign
= V3D_QPU_MSFIGN_P
;
2688 vir_link_blocks(c
->cur_block
, c
->loop_cont_block
);
2689 vir_link_blocks(c
->cur_block
, c
->loop_break_block
);
2691 vir_set_emit_block(c
, c
->loop_break_block
);
2692 if (was_uniform_control_flow
)
2693 c
->execute
= c
->undef
;
2695 ntq_activate_execute_for_block(c
);
2697 c
->loop_break_block
= save_loop_break_block
;
2698 c
->loop_cont_block
= save_loop_cont_block
;
2702 c
->in_control_flow
= was_in_control_flow
;
2706 ntq_emit_function(struct v3d_compile
*c
, nir_function_impl
*func
)
2708 fprintf(stderr
, "FUNCTIONS not handled.\n");
2713 ntq_emit_cf_list(struct v3d_compile
*c
, struct exec_list
*list
)
2715 foreach_list_typed(nir_cf_node
, node
, node
, list
) {
2716 switch (node
->type
) {
2717 case nir_cf_node_block
:
2718 ntq_emit_block(c
, nir_cf_node_as_block(node
));
2721 case nir_cf_node_if
:
2722 ntq_emit_if(c
, nir_cf_node_as_if(node
));
2725 case nir_cf_node_loop
:
2726 ntq_emit_loop(c
, nir_cf_node_as_loop(node
));
2729 case nir_cf_node_function
:
2730 ntq_emit_function(c
, nir_cf_node_as_function(node
));
2734 fprintf(stderr
, "Unknown NIR node type\n");
2741 ntq_emit_impl(struct v3d_compile
*c
, nir_function_impl
*impl
)
2743 ntq_setup_registers(c
, &impl
->registers
);
2744 ntq_emit_cf_list(c
, &impl
->body
);
2748 nir_to_vir(struct v3d_compile
*c
)
2750 switch (c
->s
->info
.stage
) {
2751 case MESA_SHADER_FRAGMENT
:
2752 c
->payload_w
= vir_MOV(c
, vir_reg(QFILE_REG
, 0));
2753 c
->payload_w_centroid
= vir_MOV(c
, vir_reg(QFILE_REG
, 1));
2754 c
->payload_z
= vir_MOV(c
, vir_reg(QFILE_REG
, 2));
2756 /* V3D 4.x can disable implicit point coordinate varyings if
2757 * they are not used.
2759 if (c
->fs_key
->is_points
&&
2760 (c
->devinfo
->ver
< 40 || program_reads_point_coord(c
))) {
2761 c
->point_x
= emit_fragment_varying(c
, NULL
, 0, 0);
2762 c
->point_y
= emit_fragment_varying(c
, NULL
, 0, 0);
2763 c
->uses_implicit_point_line_varyings
= true;
2764 } else if (c
->fs_key
->is_lines
&&
2765 (c
->devinfo
->ver
< 40 ||
2766 (c
->s
->info
.system_values_read
&
2767 BITFIELD64_BIT(SYSTEM_VALUE_LINE_COORD
)))) {
2768 c
->line_x
= emit_fragment_varying(c
, NULL
, 0, 0);
2769 c
->uses_implicit_point_line_varyings
= true;
2772 case MESA_SHADER_COMPUTE
:
2773 /* Set up the TSO for barriers, assuming we do some. */
2774 if (c
->devinfo
->ver
< 42) {
2775 vir_BARRIERID_dest(c
, vir_reg(QFILE_MAGIC
,
2776 V3D_QPU_WADDR_SYNC
));
2779 c
->cs_payload
[0] = vir_MOV(c
, vir_reg(QFILE_REG
, 0));
2780 c
->cs_payload
[1] = vir_MOV(c
, vir_reg(QFILE_REG
, 2));
2782 /* Set up the division between gl_LocalInvocationIndex and
2783 * wg_in_mem in the payload reg.
2785 int wg_size
= (c
->s
->info
.cs
.local_size
[0] *
2786 c
->s
->info
.cs
.local_size
[1] *
2787 c
->s
->info
.cs
.local_size
[2]);
2788 c
->local_invocation_index_bits
=
2789 ffs(util_next_power_of_two(MAX2(wg_size
, 64))) - 1;
2790 assert(c
->local_invocation_index_bits
<= 8);
2792 if (c
->s
->info
.cs
.shared_size
) {
2793 struct qreg wg_in_mem
= vir_SHR(c
, c
->cs_payload
[1],
2794 vir_uniform_ui(c
, 16));
2795 if (c
->s
->info
.cs
.local_size
[0] != 1 ||
2796 c
->s
->info
.cs
.local_size
[1] != 1 ||
2797 c
->s
->info
.cs
.local_size
[2] != 1) {
2799 c
->local_invocation_index_bits
);
2800 int wg_mask
= (1 << wg_bits
) - 1;
2801 wg_in_mem
= vir_AND(c
, wg_in_mem
,
2802 vir_uniform_ui(c
, wg_mask
));
2804 struct qreg shared_per_wg
=
2805 vir_uniform_ui(c
, c
->s
->info
.cs
.shared_size
);
2807 c
->cs_shared_offset
=
2809 vir_uniform(c
, QUNIFORM_SHARED_OFFSET
,0),
2810 vir_UMUL(c
, wg_in_mem
, shared_per_wg
));
2817 if (c
->s
->scratch_size
) {
2818 v3d_setup_spill_base(c
);
2819 c
->spill_size
+= V3D_CHANNELS
* c
->s
->scratch_size
;
2822 switch (c
->s
->info
.stage
) {
2823 case MESA_SHADER_VERTEX
:
2824 ntq_setup_vs_inputs(c
);
2826 case MESA_SHADER_GEOMETRY
:
2827 ntq_setup_gs_inputs(c
);
2829 case MESA_SHADER_FRAGMENT
:
2830 ntq_setup_fs_inputs(c
);
2832 case MESA_SHADER_COMPUTE
:
2835 unreachable("unsupported shader stage");
2838 ntq_setup_outputs(c
);
2840 /* Find the main function and emit the body. */
2841 nir_foreach_function(function
, c
->s
) {
2842 assert(strcmp(function
->name
, "main") == 0);
2843 assert(function
->impl
);
2844 ntq_emit_impl(c
, function
->impl
);
2848 const nir_shader_compiler_options v3d_nir_options
= {
2849 .lower_all_io_to_temps
= true,
2850 .lower_extract_byte
= true,
2851 .lower_extract_word
= true,
2852 .lower_bitfield_insert_to_shifts
= true,
2853 .lower_bitfield_extract_to_shifts
= true,
2854 .lower_bitfield_reverse
= true,
2855 .lower_bit_count
= true,
2856 .lower_cs_local_id_from_index
= true,
2857 .lower_ffract
= true,
2859 .lower_pack_unorm_2x16
= true,
2860 .lower_pack_snorm_2x16
= true,
2861 .lower_pack_unorm_4x8
= true,
2862 .lower_pack_snorm_4x8
= true,
2863 .lower_unpack_unorm_4x8
= true,
2864 .lower_unpack_snorm_4x8
= true,
2865 .lower_pack_half_2x16
= true,
2866 .lower_unpack_half_2x16
= true,
2868 .lower_find_lsb
= true,
2870 .lower_flrp32
= true,
2873 .lower_fsqrt
= true,
2874 .lower_ifind_msb
= true,
2875 .lower_isign
= true,
2876 .lower_ldexp
= true,
2877 .lower_mul_high
= true,
2878 .lower_wpos_pntc
= true,
2879 .lower_rotate
= true,
2880 .lower_to_scalar
= true,
2884 * When demoting a shader down to single-threaded, removes the THRSW
2885 * instructions (one will still be inserted at v3d_vir_to_qpu() for the
2889 vir_remove_thrsw(struct v3d_compile
*c
)
2891 vir_for_each_block(block
, c
) {
2892 vir_for_each_inst_safe(inst
, block
) {
2893 if (inst
->qpu
.sig
.thrsw
)
2894 vir_remove_instruction(c
, inst
);
2898 c
->last_thrsw
= NULL
;
2902 vir_emit_last_thrsw(struct v3d_compile
*c
)
2904 /* On V3D before 4.1, we need a TMU op to be outstanding when thread
2905 * switching, so disable threads if we didn't do any TMU ops (each of
2906 * which would have emitted a THRSW).
2908 if (!c
->last_thrsw_at_top_level
&& c
->devinfo
->ver
< 41) {
2911 vir_remove_thrsw(c
);
2915 /* If we're threaded and the last THRSW was in conditional code, then
2916 * we need to emit another one so that we can flag it as the last
2919 if (c
->last_thrsw
&& !c
->last_thrsw_at_top_level
) {
2920 assert(c
->devinfo
->ver
>= 41);
2924 /* If we're threaded, then we need to mark the last THRSW instruction
2925 * so we can emit a pair of them at QPU emit time.
2927 * For V3D 4.x, we can spawn the non-fragment shaders already in the
2928 * post-last-THRSW state, so we can skip this.
2930 if (!c
->last_thrsw
&& c
->s
->info
.stage
== MESA_SHADER_FRAGMENT
) {
2931 assert(c
->devinfo
->ver
>= 41);
2936 c
->last_thrsw
->is_last_thrsw
= true;
2939 /* There's a flag in the shader for "center W is needed for reasons other than
2940 * non-centroid varyings", so we just walk the program after VIR optimization
2941 * to see if it's used. It should be harmless to set even if we only use
2942 * center W for varyings.
2945 vir_check_payload_w(struct v3d_compile
*c
)
2947 if (c
->s
->info
.stage
!= MESA_SHADER_FRAGMENT
)
2950 vir_for_each_inst_inorder(inst
, c
) {
2951 for (int i
= 0; i
< vir_get_nsrc(inst
); i
++) {
2952 if (inst
->src
[i
].file
== QFILE_REG
&&
2953 inst
->src
[i
].index
== 0) {
2954 c
->uses_center_w
= true;
2963 v3d_nir_to_vir(struct v3d_compile
*c
)
2965 if (V3D_DEBUG
& (V3D_DEBUG_NIR
|
2966 v3d_debug_flag_for_shader_stage(c
->s
->info
.stage
))) {
2967 fprintf(stderr
, "%s prog %d/%d NIR:\n",
2968 vir_get_stage_name(c
),
2969 c
->program_id
, c
->variant_id
);
2970 nir_print_shader(c
->s
, stderr
);
2975 /* Emit the last THRSW before STVPM and TLB writes. */
2976 vir_emit_last_thrsw(c
);
2978 switch (c
->s
->info
.stage
) {
2979 case MESA_SHADER_FRAGMENT
:
2982 case MESA_SHADER_GEOMETRY
:
2985 case MESA_SHADER_VERTEX
:
2988 case MESA_SHADER_COMPUTE
:
2991 unreachable("bad stage");
2994 if (V3D_DEBUG
& (V3D_DEBUG_VIR
|
2995 v3d_debug_flag_for_shader_stage(c
->s
->info
.stage
))) {
2996 fprintf(stderr
, "%s prog %d/%d pre-opt VIR:\n",
2997 vir_get_stage_name(c
),
2998 c
->program_id
, c
->variant_id
);
3000 fprintf(stderr
, "\n");
3005 vir_check_payload_w(c
);
3007 /* XXX perf: On VC4, we do a VIR-level instruction scheduling here.
3008 * We used that on that platform to pipeline TMU writes and reduce the
3009 * number of thread switches, as well as try (mostly successfully) to
3010 * reduce maximum register pressure to allow more threads. We should
3011 * do something of that sort for V3D -- either instruction scheduling
3012 * here, or delay the the THRSW and LDTMUs from our texture
3013 * instructions until the results are needed.
3016 if (V3D_DEBUG
& (V3D_DEBUG_VIR
|
3017 v3d_debug_flag_for_shader_stage(c
->s
->info
.stage
))) {
3018 fprintf(stderr
, "%s prog %d/%d VIR:\n",
3019 vir_get_stage_name(c
),
3020 c
->program_id
, c
->variant_id
);
3022 fprintf(stderr
, "\n");
3025 /* Attempt to allocate registers for the temporaries. If we fail,
3026 * reduce thread count and try again.
3028 int min_threads
= (c
->devinfo
->ver
>= 41) ? 2 : 1;
3029 struct qpu_reg
*temp_registers
;
3032 temp_registers
= v3d_register_allocate(c
, &spilled
);
3039 if (c
->threads
== min_threads
) {
3040 if (c
->fallback_scheduler
) {
3042 "Failed to register allocate at %d "
3047 c
->compilation_result
=
3048 V3D_COMPILATION_FAILED_REGISTER_ALLOCATION
;
3054 if (c
->threads
== 1)
3055 vir_remove_thrsw(c
);
3059 (V3D_DEBUG
& (V3D_DEBUG_VIR
|
3060 v3d_debug_flag_for_shader_stage(c
->s
->info
.stage
)))) {
3061 fprintf(stderr
, "%s prog %d/%d spilled VIR:\n",
3062 vir_get_stage_name(c
),
3063 c
->program_id
, c
->variant_id
);
3065 fprintf(stderr
, "\n");
3068 v3d_vir_to_qpu(c
, temp_registers
);