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freedreno/ir3: don't hardcode wrmask
[mesa.git] / src / freedreno / ir3 / ir3_compiler_nir.c
1 /*
2 * Copyright (C) 2015 Rob Clark <robclark@freedesktop.org>
3 *
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:
10 *
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
13 * Software.
14 *
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robclark@freedesktop.org>
25 */
26
27 #include <stdarg.h>
28
29 #include "util/u_string.h"
30 #include "util/u_memory.h"
31 #include "util/u_math.h"
32
33 #include "ir3_compiler.h"
34 #include "ir3_image.h"
35 #include "ir3_shader.h"
36 #include "ir3_nir.h"
37
38 #include "instr-a3xx.h"
39 #include "ir3.h"
40 #include "ir3_context.h"
41
42
43 static struct ir3_instruction *
44 create_indirect_load(struct ir3_context *ctx, unsigned arrsz, int n,
45 struct ir3_instruction *address, struct ir3_instruction *collect)
46 {
47 struct ir3_block *block = ctx->block;
48 struct ir3_instruction *mov;
49 struct ir3_register *src;
50
51 mov = ir3_instr_create(block, OPC_MOV);
52 mov->cat1.src_type = TYPE_U32;
53 mov->cat1.dst_type = TYPE_U32;
54 ir3_reg_create(mov, 0, 0);
55 src = ir3_reg_create(mov, 0, IR3_REG_SSA | IR3_REG_RELATIV);
56 src->instr = collect;
57 src->size = arrsz;
58 src->array.offset = n;
59
60 ir3_instr_set_address(mov, address);
61
62 return mov;
63 }
64
65 static struct ir3_instruction *
66 create_input_compmask(struct ir3_context *ctx, unsigned n, unsigned compmask)
67 {
68 struct ir3_instruction *in;
69
70 in = ir3_instr_create(ctx->in_block, OPC_META_INPUT);
71 in->inout.block = ctx->in_block;
72 ir3_reg_create(in, n, 0);
73
74 in->regs[0]->wrmask = compmask;
75
76 return in;
77 }
78
79 static struct ir3_instruction *
80 create_input(struct ir3_context *ctx, unsigned n)
81 {
82 return create_input_compmask(ctx, n, 0x1);
83 }
84
85 static struct ir3_instruction *
86 create_frag_input(struct ir3_context *ctx, bool use_ldlv)
87 {
88 struct ir3_block *block = ctx->block;
89 struct ir3_instruction *instr;
90 /* actual inloc is assigned and fixed up later: */
91 struct ir3_instruction *inloc = create_immed(block, 0);
92
93 if (use_ldlv) {
94 instr = ir3_LDLV(block, inloc, 0, create_immed(block, 1), 0);
95 instr->cat6.type = TYPE_U32;
96 instr->cat6.iim_val = 1;
97 } else {
98 instr = ir3_BARY_F(block, inloc, 0, ctx->frag_vcoord, 0);
99 instr->regs[2]->wrmask = 0x3;
100 }
101
102 return instr;
103 }
104
105 static struct ir3_instruction *
106 create_driver_param(struct ir3_context *ctx, enum ir3_driver_param dp)
107 {
108 /* first four vec4 sysval's reserved for UBOs: */
109 /* NOTE: dp is in scalar, but there can be >4 dp components: */
110 unsigned n = ctx->so->constbase.driver_param;
111 unsigned r = regid(n + dp / 4, dp % 4);
112 return create_uniform(ctx->block, r);
113 }
114
115 /*
116 * Adreno uses uint rather than having dedicated bool type,
117 * which (potentially) requires some conversion, in particular
118 * when using output of an bool instr to int input, or visa
119 * versa.
120 *
121 * | Adreno | NIR |
122 * -------+---------+-------+-
123 * true | 1 | ~0 |
124 * false | 0 | 0 |
125 *
126 * To convert from an adreno bool (uint) to nir, use:
127 *
128 * absneg.s dst, (neg)src
129 *
130 * To convert back in the other direction:
131 *
132 * absneg.s dst, (abs)arc
133 *
134 * The CP step can clean up the absneg.s that cancel each other
135 * out, and with a slight bit of extra cleverness (to recognize
136 * the instructions which produce either a 0 or 1) can eliminate
137 * the absneg.s's completely when an instruction that wants
138 * 0/1 consumes the result. For example, when a nir 'bcsel'
139 * consumes the result of 'feq'. So we should be able to get by
140 * without a boolean resolve step, and without incuring any
141 * extra penalty in instruction count.
142 */
143
144 /* NIR bool -> native (adreno): */
145 static struct ir3_instruction *
146 ir3_b2n(struct ir3_block *block, struct ir3_instruction *instr)
147 {
148 return ir3_ABSNEG_S(block, instr, IR3_REG_SABS);
149 }
150
151 /* native (adreno) -> NIR bool: */
152 static struct ir3_instruction *
153 ir3_n2b(struct ir3_block *block, struct ir3_instruction *instr)
154 {
155 return ir3_ABSNEG_S(block, instr, IR3_REG_SNEG);
156 }
157
158 /*
159 * alu/sfu instructions:
160 */
161
162 static struct ir3_instruction *
163 create_cov(struct ir3_context *ctx, struct ir3_instruction *src,
164 unsigned src_bitsize, nir_op op)
165 {
166 type_t src_type, dst_type;
167
168 switch (op) {
169 case nir_op_f2f32:
170 case nir_op_f2f16_rtne:
171 case nir_op_f2f16_rtz:
172 case nir_op_f2f16:
173 case nir_op_f2i32:
174 case nir_op_f2i16:
175 case nir_op_f2i8:
176 case nir_op_f2u32:
177 case nir_op_f2u16:
178 case nir_op_f2u8:
179 switch (src_bitsize) {
180 case 32:
181 src_type = TYPE_F32;
182 break;
183 case 16:
184 src_type = TYPE_F16;
185 break;
186 default:
187 ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
188 }
189 break;
190
191 case nir_op_i2f32:
192 case nir_op_i2f16:
193 case nir_op_i2i32:
194 case nir_op_i2i16:
195 case nir_op_i2i8:
196 switch (src_bitsize) {
197 case 32:
198 src_type = TYPE_S32;
199 break;
200 case 16:
201 src_type = TYPE_S16;
202 break;
203 case 8:
204 src_type = TYPE_S8;
205 break;
206 default:
207 ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
208 }
209 break;
210
211 case nir_op_u2f32:
212 case nir_op_u2f16:
213 case nir_op_u2u32:
214 case nir_op_u2u16:
215 case nir_op_u2u8:
216 switch (src_bitsize) {
217 case 32:
218 src_type = TYPE_U32;
219 break;
220 case 16:
221 src_type = TYPE_U16;
222 break;
223 case 8:
224 src_type = TYPE_U8;
225 break;
226 default:
227 ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
228 }
229 break;
230
231 default:
232 ir3_context_error(ctx, "invalid conversion op: %u", op);
233 }
234
235 switch (op) {
236 case nir_op_f2f32:
237 case nir_op_i2f32:
238 case nir_op_u2f32:
239 dst_type = TYPE_F32;
240 break;
241
242 case nir_op_f2f16_rtne:
243 case nir_op_f2f16_rtz:
244 case nir_op_f2f16:
245 /* TODO how to handle rounding mode? */
246 case nir_op_i2f16:
247 case nir_op_u2f16:
248 dst_type = TYPE_F16;
249 break;
250
251 case nir_op_f2i32:
252 case nir_op_i2i32:
253 dst_type = TYPE_S32;
254 break;
255
256 case nir_op_f2i16:
257 case nir_op_i2i16:
258 dst_type = TYPE_S16;
259 break;
260
261 case nir_op_f2i8:
262 case nir_op_i2i8:
263 dst_type = TYPE_S8;
264 break;
265
266 case nir_op_f2u32:
267 case nir_op_u2u32:
268 dst_type = TYPE_U32;
269 break;
270
271 case nir_op_f2u16:
272 case nir_op_u2u16:
273 dst_type = TYPE_U16;
274 break;
275
276 case nir_op_f2u8:
277 case nir_op_u2u8:
278 dst_type = TYPE_U8;
279 break;
280
281 default:
282 ir3_context_error(ctx, "invalid conversion op: %u", op);
283 }
284
285 return ir3_COV(ctx->block, src, src_type, dst_type);
286 }
287
288 static void
289 emit_alu(struct ir3_context *ctx, nir_alu_instr *alu)
290 {
291 const nir_op_info *info = &nir_op_infos[alu->op];
292 struct ir3_instruction **dst, *src[info->num_inputs];
293 unsigned bs[info->num_inputs]; /* bit size */
294 struct ir3_block *b = ctx->block;
295 unsigned dst_sz, wrmask;
296
297 if (alu->dest.dest.is_ssa) {
298 dst_sz = alu->dest.dest.ssa.num_components;
299 wrmask = (1 << dst_sz) - 1;
300 } else {
301 dst_sz = alu->dest.dest.reg.reg->num_components;
302 wrmask = alu->dest.write_mask;
303 }
304
305 dst = ir3_get_dst(ctx, &alu->dest.dest, dst_sz);
306
307 /* Vectors are special in that they have non-scalarized writemasks,
308 * and just take the first swizzle channel for each argument in
309 * order into each writemask channel.
310 */
311 if ((alu->op == nir_op_vec2) ||
312 (alu->op == nir_op_vec3) ||
313 (alu->op == nir_op_vec4)) {
314
315 for (int i = 0; i < info->num_inputs; i++) {
316 nir_alu_src *asrc = &alu->src[i];
317
318 compile_assert(ctx, !asrc->abs);
319 compile_assert(ctx, !asrc->negate);
320
321 src[i] = ir3_get_src(ctx, &asrc->src)[asrc->swizzle[0]];
322 if (!src[i])
323 src[i] = create_immed(ctx->block, 0);
324 dst[i] = ir3_MOV(b, src[i], TYPE_U32);
325 }
326
327 ir3_put_dst(ctx, &alu->dest.dest);
328 return;
329 }
330
331 /* We also get mov's with more than one component for mov's so
332 * handle those specially:
333 */
334 if ((alu->op == nir_op_imov) || (alu->op == nir_op_fmov)) {
335 type_t type = (alu->op == nir_op_imov) ? TYPE_U32 : TYPE_F32;
336 nir_alu_src *asrc = &alu->src[0];
337 struct ir3_instruction *const *src0 = ir3_get_src(ctx, &asrc->src);
338
339 for (unsigned i = 0; i < dst_sz; i++) {
340 if (wrmask & (1 << i)) {
341 dst[i] = ir3_MOV(b, src0[asrc->swizzle[i]], type);
342 } else {
343 dst[i] = NULL;
344 }
345 }
346
347 ir3_put_dst(ctx, &alu->dest.dest);
348 return;
349 }
350
351 /* General case: We can just grab the one used channel per src. */
352 for (int i = 0; i < info->num_inputs; i++) {
353 unsigned chan = ffs(alu->dest.write_mask) - 1;
354 nir_alu_src *asrc = &alu->src[i];
355
356 compile_assert(ctx, !asrc->abs);
357 compile_assert(ctx, !asrc->negate);
358
359 src[i] = ir3_get_src(ctx, &asrc->src)[asrc->swizzle[chan]];
360 bs[i] = nir_src_bit_size(asrc->src);
361
362 compile_assert(ctx, src[i]);
363 }
364
365 switch (alu->op) {
366 case nir_op_f2f32:
367 case nir_op_f2f16_rtne:
368 case nir_op_f2f16_rtz:
369 case nir_op_f2f16:
370 case nir_op_f2i32:
371 case nir_op_f2i16:
372 case nir_op_f2i8:
373 case nir_op_f2u32:
374 case nir_op_f2u16:
375 case nir_op_f2u8:
376 case nir_op_i2f32:
377 case nir_op_i2f16:
378 case nir_op_i2i32:
379 case nir_op_i2i16:
380 case nir_op_i2i8:
381 case nir_op_u2f32:
382 case nir_op_u2f16:
383 case nir_op_u2u32:
384 case nir_op_u2u16:
385 case nir_op_u2u8:
386 dst[0] = create_cov(ctx, src[0], bs[0], alu->op);
387 break;
388 case nir_op_f2b32:
389 dst[0] = ir3_CMPS_F(b, src[0], 0, create_immed(b, fui(0.0)), 0);
390 dst[0]->cat2.condition = IR3_COND_NE;
391 dst[0] = ir3_n2b(b, dst[0]);
392 break;
393 case nir_op_b2f16:
394 case nir_op_b2f32:
395 dst[0] = ir3_COV(b, ir3_b2n(b, src[0]), TYPE_U32, TYPE_F32);
396 break;
397 case nir_op_b2i8:
398 case nir_op_b2i16:
399 case nir_op_b2i32:
400 dst[0] = ir3_b2n(b, src[0]);
401 break;
402 case nir_op_i2b32:
403 dst[0] = ir3_CMPS_S(b, src[0], 0, create_immed(b, 0), 0);
404 dst[0]->cat2.condition = IR3_COND_NE;
405 dst[0] = ir3_n2b(b, dst[0]);
406 break;
407
408 case nir_op_fneg:
409 dst[0] = ir3_ABSNEG_F(b, src[0], IR3_REG_FNEG);
410 break;
411 case nir_op_fabs:
412 dst[0] = ir3_ABSNEG_F(b, src[0], IR3_REG_FABS);
413 break;
414 case nir_op_fmax:
415 dst[0] = ir3_MAX_F(b, src[0], 0, src[1], 0);
416 break;
417 case nir_op_fmin:
418 dst[0] = ir3_MIN_F(b, src[0], 0, src[1], 0);
419 break;
420 case nir_op_fsat:
421 /* if there is just a single use of the src, and it supports
422 * (sat) bit, we can just fold the (sat) flag back to the
423 * src instruction and create a mov. This is easier for cp
424 * to eliminate.
425 *
426 * TODO probably opc_cat==4 is ok too
427 */
428 if (alu->src[0].src.is_ssa &&
429 (list_length(&alu->src[0].src.ssa->uses) == 1) &&
430 ((opc_cat(src[0]->opc) == 2) || (opc_cat(src[0]->opc) == 3))) {
431 src[0]->flags |= IR3_INSTR_SAT;
432 dst[0] = ir3_MOV(b, src[0], TYPE_U32);
433 } else {
434 /* otherwise generate a max.f that saturates.. blob does
435 * similar (generating a cat2 mov using max.f)
436 */
437 dst[0] = ir3_MAX_F(b, src[0], 0, src[0], 0);
438 dst[0]->flags |= IR3_INSTR_SAT;
439 }
440 break;
441 case nir_op_fmul:
442 dst[0] = ir3_MUL_F(b, src[0], 0, src[1], 0);
443 break;
444 case nir_op_fadd:
445 dst[0] = ir3_ADD_F(b, src[0], 0, src[1], 0);
446 break;
447 case nir_op_fsub:
448 dst[0] = ir3_ADD_F(b, src[0], 0, src[1], IR3_REG_FNEG);
449 break;
450 case nir_op_ffma:
451 dst[0] = ir3_MAD_F32(b, src[0], 0, src[1], 0, src[2], 0);
452 break;
453 case nir_op_fddx:
454 dst[0] = ir3_DSX(b, src[0], 0);
455 dst[0]->cat5.type = TYPE_F32;
456 break;
457 case nir_op_fddy:
458 dst[0] = ir3_DSY(b, src[0], 0);
459 dst[0]->cat5.type = TYPE_F32;
460 break;
461 break;
462 case nir_op_flt32:
463 dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
464 dst[0]->cat2.condition = IR3_COND_LT;
465 dst[0] = ir3_n2b(b, dst[0]);
466 break;
467 case nir_op_fge32:
468 dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
469 dst[0]->cat2.condition = IR3_COND_GE;
470 dst[0] = ir3_n2b(b, dst[0]);
471 break;
472 case nir_op_feq32:
473 dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
474 dst[0]->cat2.condition = IR3_COND_EQ;
475 dst[0] = ir3_n2b(b, dst[0]);
476 break;
477 case nir_op_fne32:
478 dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
479 dst[0]->cat2.condition = IR3_COND_NE;
480 dst[0] = ir3_n2b(b, dst[0]);
481 break;
482 case nir_op_fceil:
483 dst[0] = ir3_CEIL_F(b, src[0], 0);
484 break;
485 case nir_op_ffloor:
486 dst[0] = ir3_FLOOR_F(b, src[0], 0);
487 break;
488 case nir_op_ftrunc:
489 dst[0] = ir3_TRUNC_F(b, src[0], 0);
490 break;
491 case nir_op_fround_even:
492 dst[0] = ir3_RNDNE_F(b, src[0], 0);
493 break;
494 case nir_op_fsign:
495 dst[0] = ir3_SIGN_F(b, src[0], 0);
496 break;
497
498 case nir_op_fsin:
499 dst[0] = ir3_SIN(b, src[0], 0);
500 break;
501 case nir_op_fcos:
502 dst[0] = ir3_COS(b, src[0], 0);
503 break;
504 case nir_op_frsq:
505 dst[0] = ir3_RSQ(b, src[0], 0);
506 break;
507 case nir_op_frcp:
508 dst[0] = ir3_RCP(b, src[0], 0);
509 break;
510 case nir_op_flog2:
511 dst[0] = ir3_LOG2(b, src[0], 0);
512 break;
513 case nir_op_fexp2:
514 dst[0] = ir3_EXP2(b, src[0], 0);
515 break;
516 case nir_op_fsqrt:
517 dst[0] = ir3_SQRT(b, src[0], 0);
518 break;
519
520 case nir_op_iabs:
521 dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SABS);
522 break;
523 case nir_op_iadd:
524 dst[0] = ir3_ADD_U(b, src[0], 0, src[1], 0);
525 break;
526 case nir_op_iand:
527 dst[0] = ir3_AND_B(b, src[0], 0, src[1], 0);
528 break;
529 case nir_op_imax:
530 dst[0] = ir3_MAX_S(b, src[0], 0, src[1], 0);
531 break;
532 case nir_op_umax:
533 dst[0] = ir3_MAX_U(b, src[0], 0, src[1], 0);
534 break;
535 case nir_op_imin:
536 dst[0] = ir3_MIN_S(b, src[0], 0, src[1], 0);
537 break;
538 case nir_op_umin:
539 dst[0] = ir3_MIN_U(b, src[0], 0, src[1], 0);
540 break;
541 case nir_op_imul:
542 /*
543 * dst = (al * bl) + (ah * bl << 16) + (al * bh << 16)
544 * mull.u tmp0, a, b ; mul low, i.e. al * bl
545 * madsh.m16 tmp1, a, b, tmp0 ; mul-add shift high mix, i.e. ah * bl << 16
546 * madsh.m16 dst, b, a, tmp1 ; i.e. al * bh << 16
547 */
548 dst[0] = ir3_MADSH_M16(b, src[1], 0, src[0], 0,
549 ir3_MADSH_M16(b, src[0], 0, src[1], 0,
550 ir3_MULL_U(b, src[0], 0, src[1], 0), 0), 0);
551 break;
552 case nir_op_ineg:
553 dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SNEG);
554 break;
555 case nir_op_inot:
556 dst[0] = ir3_NOT_B(b, src[0], 0);
557 break;
558 case nir_op_ior:
559 dst[0] = ir3_OR_B(b, src[0], 0, src[1], 0);
560 break;
561 case nir_op_ishl:
562 dst[0] = ir3_SHL_B(b, src[0], 0, src[1], 0);
563 break;
564 case nir_op_ishr:
565 dst[0] = ir3_ASHR_B(b, src[0], 0, src[1], 0);
566 break;
567 case nir_op_isub:
568 dst[0] = ir3_SUB_U(b, src[0], 0, src[1], 0);
569 break;
570 case nir_op_ixor:
571 dst[0] = ir3_XOR_B(b, src[0], 0, src[1], 0);
572 break;
573 case nir_op_ushr:
574 dst[0] = ir3_SHR_B(b, src[0], 0, src[1], 0);
575 break;
576 case nir_op_ilt32:
577 dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
578 dst[0]->cat2.condition = IR3_COND_LT;
579 dst[0] = ir3_n2b(b, dst[0]);
580 break;
581 case nir_op_ige32:
582 dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
583 dst[0]->cat2.condition = IR3_COND_GE;
584 dst[0] = ir3_n2b(b, dst[0]);
585 break;
586 case nir_op_ieq32:
587 dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
588 dst[0]->cat2.condition = IR3_COND_EQ;
589 dst[0] = ir3_n2b(b, dst[0]);
590 break;
591 case nir_op_ine32:
592 dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
593 dst[0]->cat2.condition = IR3_COND_NE;
594 dst[0] = ir3_n2b(b, dst[0]);
595 break;
596 case nir_op_ult32:
597 dst[0] = ir3_CMPS_U(b, src[0], 0, src[1], 0);
598 dst[0]->cat2.condition = IR3_COND_LT;
599 dst[0] = ir3_n2b(b, dst[0]);
600 break;
601 case nir_op_uge32:
602 dst[0] = ir3_CMPS_U(b, src[0], 0, src[1], 0);
603 dst[0]->cat2.condition = IR3_COND_GE;
604 dst[0] = ir3_n2b(b, dst[0]);
605 break;
606
607 case nir_op_b32csel: {
608 struct ir3_instruction *cond = ir3_b2n(b, src[0]);
609 compile_assert(ctx, bs[1] == bs[2]);
610 /* the boolean condition is 32b even if src[1] and src[2] are
611 * half-precision, but sel.b16 wants all three src's to be the
612 * same type.
613 */
614 if (bs[1] < 32)
615 cond = ir3_COV(b, cond, TYPE_U32, TYPE_U16);
616 dst[0] = ir3_SEL_B32(b, src[1], 0, cond, 0, src[2], 0);
617 break;
618 }
619 case nir_op_bit_count:
620 dst[0] = ir3_CBITS_B(b, src[0], 0);
621 break;
622 case nir_op_ifind_msb: {
623 struct ir3_instruction *cmp;
624 dst[0] = ir3_CLZ_S(b, src[0], 0);
625 cmp = ir3_CMPS_S(b, dst[0], 0, create_immed(b, 0), 0);
626 cmp->cat2.condition = IR3_COND_GE;
627 dst[0] = ir3_SEL_B32(b,
628 ir3_SUB_U(b, create_immed(b, 31), 0, dst[0], 0), 0,
629 cmp, 0, dst[0], 0);
630 break;
631 }
632 case nir_op_ufind_msb:
633 dst[0] = ir3_CLZ_B(b, src[0], 0);
634 dst[0] = ir3_SEL_B32(b,
635 ir3_SUB_U(b, create_immed(b, 31), 0, dst[0], 0), 0,
636 src[0], 0, dst[0], 0);
637 break;
638 case nir_op_find_lsb:
639 dst[0] = ir3_BFREV_B(b, src[0], 0);
640 dst[0] = ir3_CLZ_B(b, dst[0], 0);
641 break;
642 case nir_op_bitfield_reverse:
643 dst[0] = ir3_BFREV_B(b, src[0], 0);
644 break;
645
646 default:
647 ir3_context_error(ctx, "Unhandled ALU op: %s\n",
648 nir_op_infos[alu->op].name);
649 break;
650 }
651
652 ir3_put_dst(ctx, &alu->dest.dest);
653 }
654
655 /* handles direct/indirect UBO reads: */
656 static void
657 emit_intrinsic_load_ubo(struct ir3_context *ctx, nir_intrinsic_instr *intr,
658 struct ir3_instruction **dst)
659 {
660 struct ir3_block *b = ctx->block;
661 struct ir3_instruction *base_lo, *base_hi, *addr, *src0, *src1;
662 nir_const_value *const_offset;
663 /* UBO addresses are the first driver params: */
664 unsigned ubo = regid(ctx->so->constbase.ubo, 0);
665 const unsigned ptrsz = ir3_pointer_size(ctx);
666
667 int off = 0;
668
669 /* First src is ubo index, which could either be an immed or not: */
670 src0 = ir3_get_src(ctx, &intr->src[0])[0];
671 if (is_same_type_mov(src0) &&
672 (src0->regs[1]->flags & IR3_REG_IMMED)) {
673 base_lo = create_uniform(b, ubo + (src0->regs[1]->iim_val * ptrsz));
674 base_hi = create_uniform(b, ubo + (src0->regs[1]->iim_val * ptrsz) + 1);
675 } else {
676 base_lo = create_uniform_indirect(b, ubo, ir3_get_addr(ctx, src0, 4));
677 base_hi = create_uniform_indirect(b, ubo + 1, ir3_get_addr(ctx, src0, 4));
678 }
679
680 /* note: on 32bit gpu's base_hi is ignored and DCE'd */
681 addr = base_lo;
682
683 const_offset = nir_src_as_const_value(intr->src[1]);
684 if (const_offset) {
685 off += const_offset->u32[0];
686 } else {
687 /* For load_ubo_indirect, second src is indirect offset: */
688 src1 = ir3_get_src(ctx, &intr->src[1])[0];
689
690 /* and add offset to addr: */
691 addr = ir3_ADD_S(b, addr, 0, src1, 0);
692 }
693
694 /* if offset is to large to encode in the ldg, split it out: */
695 if ((off + (intr->num_components * 4)) > 1024) {
696 /* split out the minimal amount to improve the odds that
697 * cp can fit the immediate in the add.s instruction:
698 */
699 unsigned off2 = off + (intr->num_components * 4) - 1024;
700 addr = ir3_ADD_S(b, addr, 0, create_immed(b, off2), 0);
701 off -= off2;
702 }
703
704 if (ptrsz == 2) {
705 struct ir3_instruction *carry;
706
707 /* handle 32b rollover, ie:
708 * if (addr < base_lo)
709 * base_hi++
710 */
711 carry = ir3_CMPS_U(b, addr, 0, base_lo, 0);
712 carry->cat2.condition = IR3_COND_LT;
713 base_hi = ir3_ADD_S(b, base_hi, 0, carry, 0);
714
715 addr = ir3_create_collect(ctx, (struct ir3_instruction*[]){ addr, base_hi }, 2);
716 }
717
718 for (int i = 0; i < intr->num_components; i++) {
719 struct ir3_instruction *load =
720 ir3_LDG(b, addr, 0, create_immed(b, 1), 0);
721 load->cat6.type = TYPE_U32;
722 load->cat6.src_offset = off + i * 4; /* byte offset */
723 dst[i] = load;
724 }
725 }
726
727 /* src[] = { block_index } */
728 static void
729 emit_intrinsic_ssbo_size(struct ir3_context *ctx, nir_intrinsic_instr *intr,
730 struct ir3_instruction **dst)
731 {
732 /* SSBO size stored as a const starting at ssbo_sizes: */
733 unsigned blk_idx = nir_src_as_const_value(intr->src[0])->u32[0];
734 unsigned idx = regid(ctx->so->constbase.ssbo_sizes, 0) +
735 ctx->so->const_layout.ssbo_size.off[blk_idx];
736
737 debug_assert(ctx->so->const_layout.ssbo_size.mask & (1 << blk_idx));
738
739 dst[0] = create_uniform(ctx->block, idx);
740 }
741
742 /* src[] = { offset }. const_index[] = { base } */
743 static void
744 emit_intrinsic_load_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr,
745 struct ir3_instruction **dst)
746 {
747 struct ir3_block *b = ctx->block;
748 struct ir3_instruction *ldl, *offset;
749 unsigned base;
750
751 offset = ir3_get_src(ctx, &intr->src[0])[0];
752 base = nir_intrinsic_base(intr);
753
754 ldl = ir3_LDL(b, offset, 0, create_immed(b, intr->num_components), 0);
755 ldl->cat6.src_offset = base;
756 ldl->cat6.type = utype_dst(intr->dest);
757 ldl->regs[0]->wrmask = MASK(intr->num_components);
758
759 ldl->barrier_class = IR3_BARRIER_SHARED_R;
760 ldl->barrier_conflict = IR3_BARRIER_SHARED_W;
761
762 ir3_split_dest(b, dst, ldl, 0, intr->num_components);
763 }
764
765 /* src[] = { value, offset }. const_index[] = { base, write_mask } */
766 static void
767 emit_intrinsic_store_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr)
768 {
769 struct ir3_block *b = ctx->block;
770 struct ir3_instruction *stl, *offset;
771 struct ir3_instruction * const *value;
772 unsigned base, wrmask;
773
774 value = ir3_get_src(ctx, &intr->src[0]);
775 offset = ir3_get_src(ctx, &intr->src[1])[0];
776
777 base = nir_intrinsic_base(intr);
778 wrmask = nir_intrinsic_write_mask(intr);
779
780 /* Combine groups of consecutive enabled channels in one write
781 * message. We use ffs to find the first enabled channel and then ffs on
782 * the bit-inverse, down-shifted writemask to determine the length of
783 * the block of enabled bits.
784 *
785 * (trick stolen from i965's fs_visitor::nir_emit_cs_intrinsic())
786 */
787 while (wrmask) {
788 unsigned first_component = ffs(wrmask) - 1;
789 unsigned length = ffs(~(wrmask >> first_component)) - 1;
790
791 stl = ir3_STL(b, offset, 0,
792 ir3_create_collect(ctx, &value[first_component], length), 0,
793 create_immed(b, length), 0);
794 stl->cat6.dst_offset = first_component + base;
795 stl->cat6.type = utype_src(intr->src[0]);
796 stl->barrier_class = IR3_BARRIER_SHARED_W;
797 stl->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
798
799 array_insert(b, b->keeps, stl);
800
801 /* Clear the bits in the writemask that we just wrote, then try
802 * again to see if more channels are left.
803 */
804 wrmask &= (15 << (first_component + length));
805 }
806 }
807
808 /*
809 * CS shared variable atomic intrinsics
810 *
811 * All of the shared variable atomic memory operations read a value from
812 * memory, compute a new value using one of the operations below, write the
813 * new value to memory, and return the original value read.
814 *
815 * All operations take 2 sources except CompSwap that takes 3. These
816 * sources represent:
817 *
818 * 0: The offset into the shared variable storage region that the atomic
819 * operation will operate on.
820 * 1: The data parameter to the atomic function (i.e. the value to add
821 * in shared_atomic_add, etc).
822 * 2: For CompSwap only: the second data parameter.
823 */
824 static struct ir3_instruction *
825 emit_intrinsic_atomic_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr)
826 {
827 struct ir3_block *b = ctx->block;
828 struct ir3_instruction *atomic, *src0, *src1;
829 type_t type = TYPE_U32;
830
831 src0 = ir3_get_src(ctx, &intr->src[0])[0]; /* offset */
832 src1 = ir3_get_src(ctx, &intr->src[1])[0]; /* value */
833
834 switch (intr->intrinsic) {
835 case nir_intrinsic_shared_atomic_add:
836 atomic = ir3_ATOMIC_ADD(b, src0, 0, src1, 0);
837 break;
838 case nir_intrinsic_shared_atomic_imin:
839 atomic = ir3_ATOMIC_MIN(b, src0, 0, src1, 0);
840 type = TYPE_S32;
841 break;
842 case nir_intrinsic_shared_atomic_umin:
843 atomic = ir3_ATOMIC_MIN(b, src0, 0, src1, 0);
844 break;
845 case nir_intrinsic_shared_atomic_imax:
846 atomic = ir3_ATOMIC_MAX(b, src0, 0, src1, 0);
847 type = TYPE_S32;
848 break;
849 case nir_intrinsic_shared_atomic_umax:
850 atomic = ir3_ATOMIC_MAX(b, src0, 0, src1, 0);
851 break;
852 case nir_intrinsic_shared_atomic_and:
853 atomic = ir3_ATOMIC_AND(b, src0, 0, src1, 0);
854 break;
855 case nir_intrinsic_shared_atomic_or:
856 atomic = ir3_ATOMIC_OR(b, src0, 0, src1, 0);
857 break;
858 case nir_intrinsic_shared_atomic_xor:
859 atomic = ir3_ATOMIC_XOR(b, src0, 0, src1, 0);
860 break;
861 case nir_intrinsic_shared_atomic_exchange:
862 atomic = ir3_ATOMIC_XCHG(b, src0, 0, src1, 0);
863 break;
864 case nir_intrinsic_shared_atomic_comp_swap:
865 /* for cmpxchg, src1 is [ui]vec2(data, compare): */
866 src1 = ir3_create_collect(ctx, (struct ir3_instruction*[]){
867 ir3_get_src(ctx, &intr->src[2])[0],
868 src1,
869 }, 2);
870 atomic = ir3_ATOMIC_CMPXCHG(b, src0, 0, src1, 0);
871 break;
872 default:
873 unreachable("boo");
874 }
875
876 atomic->cat6.iim_val = 1;
877 atomic->cat6.d = 1;
878 atomic->cat6.type = type;
879 atomic->barrier_class = IR3_BARRIER_SHARED_W;
880 atomic->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
881
882 /* even if nothing consume the result, we can't DCE the instruction: */
883 array_insert(b, b->keeps, atomic);
884
885 return atomic;
886 }
887
888 /* src[] = { deref, coord, sample_index }. const_index[] = {} */
889 static void
890 emit_intrinsic_load_image(struct ir3_context *ctx, nir_intrinsic_instr *intr,
891 struct ir3_instruction **dst)
892 {
893 struct ir3_block *b = ctx->block;
894 const nir_variable *var = nir_intrinsic_get_var(intr, 0);
895 struct ir3_instruction *sam;
896 struct ir3_instruction * const *src0 = ir3_get_src(ctx, &intr->src[1]);
897 struct ir3_instruction *coords[4];
898 unsigned flags, ncoords = ir3_get_image_coords(var, &flags);
899 unsigned slot = ir3_get_image_slot(nir_src_as_deref(intr->src[0]));
900 unsigned tex_idx = ir3_image_to_tex(&ctx->so->image_mapping, slot);
901 type_t type = ir3_get_image_type(var);
902
903 /* hmm, this seems a bit odd, but it is what blob does and (at least
904 * a5xx) just faults on bogus addresses otherwise:
905 */
906 if (flags & IR3_INSTR_3D) {
907 flags &= ~IR3_INSTR_3D;
908 flags |= IR3_INSTR_A;
909 }
910
911 for (unsigned i = 0; i < ncoords; i++)
912 coords[i] = src0[i];
913
914 if (ncoords == 1)
915 coords[ncoords++] = create_immed(b, 0);
916
917 sam = ir3_SAM(b, OPC_ISAM, type, 0b1111, flags,
918 tex_idx, tex_idx, ir3_create_collect(ctx, coords, ncoords), NULL);
919
920 sam->barrier_class = IR3_BARRIER_IMAGE_R;
921 sam->barrier_conflict = IR3_BARRIER_IMAGE_W;
922
923 ir3_split_dest(b, dst, sam, 0, 4);
924 }
925
926 static void
927 emit_intrinsic_image_size(struct ir3_context *ctx, nir_intrinsic_instr *intr,
928 struct ir3_instruction **dst)
929 {
930 struct ir3_block *b = ctx->block;
931 const nir_variable *var = nir_intrinsic_get_var(intr, 0);
932 unsigned slot = ir3_get_image_slot(nir_src_as_deref(intr->src[0]));
933 unsigned tex_idx = ir3_image_to_tex(&ctx->so->image_mapping, slot);
934 struct ir3_instruction *sam, *lod;
935 unsigned flags, ncoords = ir3_get_image_coords(var, &flags);
936
937 lod = create_immed(b, 0);
938 sam = ir3_SAM(b, OPC_GETSIZE, TYPE_U32, 0b1111, flags,
939 tex_idx, tex_idx, lod, NULL);
940
941 /* Array size actually ends up in .w rather than .z. This doesn't
942 * matter for miplevel 0, but for higher mips the value in z is
943 * minified whereas w stays. Also, the value in TEX_CONST_3_DEPTH is
944 * returned, which means that we have to add 1 to it for arrays for
945 * a3xx.
946 *
947 * Note use a temporary dst and then copy, since the size of the dst
948 * array that is passed in is based on nir's understanding of the
949 * result size, not the hardware's
950 */
951 struct ir3_instruction *tmp[4];
952
953 ir3_split_dest(b, tmp, sam, 0, 4);
954
955 /* get_size instruction returns size in bytes instead of texels
956 * for imageBuffer, so we need to divide it by the pixel size
957 * of the image format.
958 *
959 * TODO: This is at least true on a5xx. Check other gens.
960 */
961 enum glsl_sampler_dim dim =
962 glsl_get_sampler_dim(glsl_without_array(var->type));
963 if (dim == GLSL_SAMPLER_DIM_BUF) {
964 /* Since all the possible values the divisor can take are
965 * power-of-two (4, 8, or 16), the division is implemented
966 * as a shift-right.
967 * During shader setup, the log2 of the image format's
968 * bytes-per-pixel should have been emitted in 2nd slot of
969 * image_dims. See ir3_shader::emit_image_dims().
970 */
971 unsigned cb = regid(ctx->so->constbase.image_dims, 0) +
972 ctx->so->const_layout.image_dims.off[var->data.driver_location];
973 struct ir3_instruction *aux = create_uniform(b, cb + 1);
974
975 tmp[0] = ir3_SHR_B(b, tmp[0], 0, aux, 0);
976 }
977
978 for (unsigned i = 0; i < ncoords; i++)
979 dst[i] = tmp[i];
980
981 if (flags & IR3_INSTR_A) {
982 if (ctx->compiler->levels_add_one) {
983 dst[ncoords-1] = ir3_ADD_U(b, tmp[3], 0, create_immed(b, 1), 0);
984 } else {
985 dst[ncoords-1] = ir3_MOV(b, tmp[3], TYPE_U32);
986 }
987 }
988 }
989
990 static void
991 emit_intrinsic_barrier(struct ir3_context *ctx, nir_intrinsic_instr *intr)
992 {
993 struct ir3_block *b = ctx->block;
994 struct ir3_instruction *barrier;
995
996 switch (intr->intrinsic) {
997 case nir_intrinsic_barrier:
998 barrier = ir3_BAR(b);
999 barrier->cat7.g = true;
1000 barrier->cat7.l = true;
1001 barrier->flags = IR3_INSTR_SS | IR3_INSTR_SY;
1002 barrier->barrier_class = IR3_BARRIER_EVERYTHING;
1003 break;
1004 case nir_intrinsic_memory_barrier:
1005 barrier = ir3_FENCE(b);
1006 barrier->cat7.g = true;
1007 barrier->cat7.r = true;
1008 barrier->cat7.w = true;
1009 barrier->barrier_class = IR3_BARRIER_IMAGE_W |
1010 IR3_BARRIER_BUFFER_W;
1011 barrier->barrier_conflict =
1012 IR3_BARRIER_IMAGE_R | IR3_BARRIER_IMAGE_W |
1013 IR3_BARRIER_BUFFER_R | IR3_BARRIER_BUFFER_W;
1014 break;
1015 case nir_intrinsic_memory_barrier_atomic_counter:
1016 case nir_intrinsic_memory_barrier_buffer:
1017 barrier = ir3_FENCE(b);
1018 barrier->cat7.g = true;
1019 barrier->cat7.r = true;
1020 barrier->cat7.w = true;
1021 barrier->barrier_class = IR3_BARRIER_BUFFER_W;
1022 barrier->barrier_conflict = IR3_BARRIER_BUFFER_R |
1023 IR3_BARRIER_BUFFER_W;
1024 break;
1025 case nir_intrinsic_memory_barrier_image:
1026 // TODO double check if this should have .g set
1027 barrier = ir3_FENCE(b);
1028 barrier->cat7.g = true;
1029 barrier->cat7.r = true;
1030 barrier->cat7.w = true;
1031 barrier->barrier_class = IR3_BARRIER_IMAGE_W;
1032 barrier->barrier_conflict = IR3_BARRIER_IMAGE_R |
1033 IR3_BARRIER_IMAGE_W;
1034 break;
1035 case nir_intrinsic_memory_barrier_shared:
1036 barrier = ir3_FENCE(b);
1037 barrier->cat7.g = true;
1038 barrier->cat7.l = true;
1039 barrier->cat7.r = true;
1040 barrier->cat7.w = true;
1041 barrier->barrier_class = IR3_BARRIER_SHARED_W;
1042 barrier->barrier_conflict = IR3_BARRIER_SHARED_R |
1043 IR3_BARRIER_SHARED_W;
1044 break;
1045 case nir_intrinsic_group_memory_barrier:
1046 barrier = ir3_FENCE(b);
1047 barrier->cat7.g = true;
1048 barrier->cat7.l = true;
1049 barrier->cat7.r = true;
1050 barrier->cat7.w = true;
1051 barrier->barrier_class = IR3_BARRIER_SHARED_W |
1052 IR3_BARRIER_IMAGE_W |
1053 IR3_BARRIER_BUFFER_W;
1054 barrier->barrier_conflict =
1055 IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W |
1056 IR3_BARRIER_IMAGE_R | IR3_BARRIER_IMAGE_W |
1057 IR3_BARRIER_BUFFER_R | IR3_BARRIER_BUFFER_W;
1058 break;
1059 default:
1060 unreachable("boo");
1061 }
1062
1063 /* make sure barrier doesn't get DCE'd */
1064 array_insert(b, b->keeps, barrier);
1065 }
1066
1067 static void add_sysval_input_compmask(struct ir3_context *ctx,
1068 gl_system_value slot, unsigned compmask,
1069 struct ir3_instruction *instr)
1070 {
1071 struct ir3_shader_variant *so = ctx->so;
1072 unsigned r = regid(so->inputs_count, 0);
1073 unsigned n = so->inputs_count++;
1074
1075 so->inputs[n].sysval = true;
1076 so->inputs[n].slot = slot;
1077 so->inputs[n].compmask = compmask;
1078 so->inputs[n].regid = r;
1079 so->inputs[n].interpolate = INTERP_MODE_FLAT;
1080 so->total_in++;
1081
1082 ctx->ir->ninputs = MAX2(ctx->ir->ninputs, r + 1);
1083 ctx->ir->inputs[r] = instr;
1084 }
1085
1086 static void add_sysval_input(struct ir3_context *ctx, gl_system_value slot,
1087 struct ir3_instruction *instr)
1088 {
1089 add_sysval_input_compmask(ctx, slot, 0x1, instr);
1090 }
1091
1092 static void
1093 emit_intrinsic(struct ir3_context *ctx, nir_intrinsic_instr *intr)
1094 {
1095 const nir_intrinsic_info *info = &nir_intrinsic_infos[intr->intrinsic];
1096 struct ir3_instruction **dst;
1097 struct ir3_instruction * const *src;
1098 struct ir3_block *b = ctx->block;
1099 nir_const_value *const_offset;
1100 int idx, comp;
1101
1102 if (info->has_dest) {
1103 unsigned n = nir_intrinsic_dest_components(intr);
1104 dst = ir3_get_dst(ctx, &intr->dest, n);
1105 } else {
1106 dst = NULL;
1107 }
1108
1109 switch (intr->intrinsic) {
1110 case nir_intrinsic_load_uniform:
1111 idx = nir_intrinsic_base(intr);
1112 const_offset = nir_src_as_const_value(intr->src[0]);
1113 if (const_offset) {
1114 idx += const_offset->u32[0];
1115 for (int i = 0; i < intr->num_components; i++) {
1116 unsigned n = idx * 4 + i;
1117 dst[i] = create_uniform(b, n);
1118 }
1119 } else {
1120 src = ir3_get_src(ctx, &intr->src[0]);
1121 for (int i = 0; i < intr->num_components; i++) {
1122 int n = idx * 4 + i;
1123 dst[i] = create_uniform_indirect(b, n,
1124 ir3_get_addr(ctx, src[0], 4));
1125 }
1126 /* NOTE: if relative addressing is used, we set
1127 * constlen in the compiler (to worst-case value)
1128 * since we don't know in the assembler what the max
1129 * addr reg value can be:
1130 */
1131 ctx->so->constlen = ctx->s->num_uniforms;
1132 }
1133 break;
1134 case nir_intrinsic_load_ubo:
1135 emit_intrinsic_load_ubo(ctx, intr, dst);
1136 break;
1137 case nir_intrinsic_load_input:
1138 idx = nir_intrinsic_base(intr);
1139 comp = nir_intrinsic_component(intr);
1140 const_offset = nir_src_as_const_value(intr->src[0]);
1141 if (const_offset) {
1142 idx += const_offset->u32[0];
1143 for (int i = 0; i < intr->num_components; i++) {
1144 unsigned n = idx * 4 + i + comp;
1145 dst[i] = ctx->ir->inputs[n];
1146 }
1147 } else {
1148 src = ir3_get_src(ctx, &intr->src[0]);
1149 struct ir3_instruction *collect =
1150 ir3_create_collect(ctx, ctx->ir->inputs, ctx->ir->ninputs);
1151 struct ir3_instruction *addr = ir3_get_addr(ctx, src[0], 4);
1152 for (int i = 0; i < intr->num_components; i++) {
1153 unsigned n = idx * 4 + i + comp;
1154 dst[i] = create_indirect_load(ctx, ctx->ir->ninputs,
1155 n, addr, collect);
1156 }
1157 }
1158 break;
1159 case nir_intrinsic_load_ssbo:
1160 ctx->funcs->emit_intrinsic_load_ssbo(ctx, intr, dst);
1161 break;
1162 case nir_intrinsic_store_ssbo:
1163 ctx->funcs->emit_intrinsic_store_ssbo(ctx, intr);
1164 break;
1165 case nir_intrinsic_get_buffer_size:
1166 emit_intrinsic_ssbo_size(ctx, intr, dst);
1167 break;
1168 case nir_intrinsic_ssbo_atomic_add:
1169 case nir_intrinsic_ssbo_atomic_imin:
1170 case nir_intrinsic_ssbo_atomic_umin:
1171 case nir_intrinsic_ssbo_atomic_imax:
1172 case nir_intrinsic_ssbo_atomic_umax:
1173 case nir_intrinsic_ssbo_atomic_and:
1174 case nir_intrinsic_ssbo_atomic_or:
1175 case nir_intrinsic_ssbo_atomic_xor:
1176 case nir_intrinsic_ssbo_atomic_exchange:
1177 case nir_intrinsic_ssbo_atomic_comp_swap:
1178 dst[0] = ctx->funcs->emit_intrinsic_atomic_ssbo(ctx, intr);
1179 break;
1180 case nir_intrinsic_load_shared:
1181 emit_intrinsic_load_shared(ctx, intr, dst);
1182 break;
1183 case nir_intrinsic_store_shared:
1184 emit_intrinsic_store_shared(ctx, intr);
1185 break;
1186 case nir_intrinsic_shared_atomic_add:
1187 case nir_intrinsic_shared_atomic_imin:
1188 case nir_intrinsic_shared_atomic_umin:
1189 case nir_intrinsic_shared_atomic_imax:
1190 case nir_intrinsic_shared_atomic_umax:
1191 case nir_intrinsic_shared_atomic_and:
1192 case nir_intrinsic_shared_atomic_or:
1193 case nir_intrinsic_shared_atomic_xor:
1194 case nir_intrinsic_shared_atomic_exchange:
1195 case nir_intrinsic_shared_atomic_comp_swap:
1196 dst[0] = emit_intrinsic_atomic_shared(ctx, intr);
1197 break;
1198 case nir_intrinsic_image_deref_load:
1199 emit_intrinsic_load_image(ctx, intr, dst);
1200 break;
1201 case nir_intrinsic_image_deref_store:
1202 ctx->funcs->emit_intrinsic_store_image(ctx, intr);
1203 break;
1204 case nir_intrinsic_image_deref_size:
1205 emit_intrinsic_image_size(ctx, intr, dst);
1206 break;
1207 case nir_intrinsic_image_deref_atomic_add:
1208 case nir_intrinsic_image_deref_atomic_min:
1209 case nir_intrinsic_image_deref_atomic_max:
1210 case nir_intrinsic_image_deref_atomic_and:
1211 case nir_intrinsic_image_deref_atomic_or:
1212 case nir_intrinsic_image_deref_atomic_xor:
1213 case nir_intrinsic_image_deref_atomic_exchange:
1214 case nir_intrinsic_image_deref_atomic_comp_swap:
1215 dst[0] = ctx->funcs->emit_intrinsic_atomic_image(ctx, intr);
1216 break;
1217 case nir_intrinsic_barrier:
1218 case nir_intrinsic_memory_barrier:
1219 case nir_intrinsic_group_memory_barrier:
1220 case nir_intrinsic_memory_barrier_atomic_counter:
1221 case nir_intrinsic_memory_barrier_buffer:
1222 case nir_intrinsic_memory_barrier_image:
1223 case nir_intrinsic_memory_barrier_shared:
1224 emit_intrinsic_barrier(ctx, intr);
1225 /* note that blk ptr no longer valid, make that obvious: */
1226 b = NULL;
1227 break;
1228 case nir_intrinsic_store_output:
1229 idx = nir_intrinsic_base(intr);
1230 comp = nir_intrinsic_component(intr);
1231 const_offset = nir_src_as_const_value(intr->src[1]);
1232 compile_assert(ctx, const_offset != NULL);
1233 idx += const_offset->u32[0];
1234
1235 src = ir3_get_src(ctx, &intr->src[0]);
1236 for (int i = 0; i < intr->num_components; i++) {
1237 unsigned n = idx * 4 + i + comp;
1238 ctx->ir->outputs[n] = src[i];
1239 }
1240 break;
1241 case nir_intrinsic_load_base_vertex:
1242 case nir_intrinsic_load_first_vertex:
1243 if (!ctx->basevertex) {
1244 ctx->basevertex = create_driver_param(ctx, IR3_DP_VTXID_BASE);
1245 add_sysval_input(ctx, SYSTEM_VALUE_FIRST_VERTEX, ctx->basevertex);
1246 }
1247 dst[0] = ctx->basevertex;
1248 break;
1249 case nir_intrinsic_load_vertex_id_zero_base:
1250 case nir_intrinsic_load_vertex_id:
1251 if (!ctx->vertex_id) {
1252 gl_system_value sv = (intr->intrinsic == nir_intrinsic_load_vertex_id) ?
1253 SYSTEM_VALUE_VERTEX_ID : SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
1254 ctx->vertex_id = create_input(ctx, 0);
1255 add_sysval_input(ctx, sv, ctx->vertex_id);
1256 }
1257 dst[0] = ctx->vertex_id;
1258 break;
1259 case nir_intrinsic_load_instance_id:
1260 if (!ctx->instance_id) {
1261 ctx->instance_id = create_input(ctx, 0);
1262 add_sysval_input(ctx, SYSTEM_VALUE_INSTANCE_ID,
1263 ctx->instance_id);
1264 }
1265 dst[0] = ctx->instance_id;
1266 break;
1267 case nir_intrinsic_load_sample_id:
1268 case nir_intrinsic_load_sample_id_no_per_sample:
1269 if (!ctx->samp_id) {
1270 ctx->samp_id = create_input(ctx, 0);
1271 ctx->samp_id->regs[0]->flags |= IR3_REG_HALF;
1272 add_sysval_input(ctx, SYSTEM_VALUE_SAMPLE_ID,
1273 ctx->samp_id);
1274 }
1275 dst[0] = ir3_COV(b, ctx->samp_id, TYPE_U16, TYPE_U32);
1276 break;
1277 case nir_intrinsic_load_sample_mask_in:
1278 if (!ctx->samp_mask_in) {
1279 ctx->samp_mask_in = create_input(ctx, 0);
1280 add_sysval_input(ctx, SYSTEM_VALUE_SAMPLE_MASK_IN,
1281 ctx->samp_mask_in);
1282 }
1283 dst[0] = ctx->samp_mask_in;
1284 break;
1285 case nir_intrinsic_load_user_clip_plane:
1286 idx = nir_intrinsic_ucp_id(intr);
1287 for (int i = 0; i < intr->num_components; i++) {
1288 unsigned n = idx * 4 + i;
1289 dst[i] = create_driver_param(ctx, IR3_DP_UCP0_X + n);
1290 }
1291 break;
1292 case nir_intrinsic_load_front_face:
1293 if (!ctx->frag_face) {
1294 ctx->so->frag_face = true;
1295 ctx->frag_face = create_input(ctx, 0);
1296 add_sysval_input(ctx, SYSTEM_VALUE_FRONT_FACE, ctx->frag_face);
1297 ctx->frag_face->regs[0]->flags |= IR3_REG_HALF;
1298 }
1299 /* for fragface, we get -1 for back and 0 for front. However this is
1300 * the inverse of what nir expects (where ~0 is true).
1301 */
1302 dst[0] = ir3_COV(b, ctx->frag_face, TYPE_S16, TYPE_S32);
1303 dst[0] = ir3_NOT_B(b, dst[0], 0);
1304 break;
1305 case nir_intrinsic_load_local_invocation_id:
1306 if (!ctx->local_invocation_id) {
1307 ctx->local_invocation_id = create_input_compmask(ctx, 0, 0x7);
1308 add_sysval_input_compmask(ctx, SYSTEM_VALUE_LOCAL_INVOCATION_ID,
1309 0x7, ctx->local_invocation_id);
1310 }
1311 ir3_split_dest(b, dst, ctx->local_invocation_id, 0, 3);
1312 break;
1313 case nir_intrinsic_load_work_group_id:
1314 if (!ctx->work_group_id) {
1315 ctx->work_group_id = create_input_compmask(ctx, 0, 0x7);
1316 add_sysval_input_compmask(ctx, SYSTEM_VALUE_WORK_GROUP_ID,
1317 0x7, ctx->work_group_id);
1318 ctx->work_group_id->regs[0]->flags |= IR3_REG_HIGH;
1319 }
1320 ir3_split_dest(b, dst, ctx->work_group_id, 0, 3);
1321 break;
1322 case nir_intrinsic_load_num_work_groups:
1323 for (int i = 0; i < intr->num_components; i++) {
1324 dst[i] = create_driver_param(ctx, IR3_DP_NUM_WORK_GROUPS_X + i);
1325 }
1326 break;
1327 case nir_intrinsic_load_local_group_size:
1328 for (int i = 0; i < intr->num_components; i++) {
1329 dst[i] = create_driver_param(ctx, IR3_DP_LOCAL_GROUP_SIZE_X + i);
1330 }
1331 break;
1332 case nir_intrinsic_discard_if:
1333 case nir_intrinsic_discard: {
1334 struct ir3_instruction *cond, *kill;
1335
1336 if (intr->intrinsic == nir_intrinsic_discard_if) {
1337 /* conditional discard: */
1338 src = ir3_get_src(ctx, &intr->src[0]);
1339 cond = ir3_b2n(b, src[0]);
1340 } else {
1341 /* unconditional discard: */
1342 cond = create_immed(b, 1);
1343 }
1344
1345 /* NOTE: only cmps.*.* can write p0.x: */
1346 cond = ir3_CMPS_S(b, cond, 0, create_immed(b, 0), 0);
1347 cond->cat2.condition = IR3_COND_NE;
1348
1349 /* condition always goes in predicate register: */
1350 cond->regs[0]->num = regid(REG_P0, 0);
1351
1352 kill = ir3_KILL(b, cond, 0);
1353 array_insert(ctx->ir, ctx->ir->predicates, kill);
1354
1355 array_insert(b, b->keeps, kill);
1356 ctx->so->has_kill = true;
1357
1358 break;
1359 }
1360 default:
1361 ir3_context_error(ctx, "Unhandled intrinsic type: %s\n",
1362 nir_intrinsic_infos[intr->intrinsic].name);
1363 break;
1364 }
1365
1366 if (info->has_dest)
1367 ir3_put_dst(ctx, &intr->dest);
1368 }
1369
1370 static void
1371 emit_load_const(struct ir3_context *ctx, nir_load_const_instr *instr)
1372 {
1373 struct ir3_instruction **dst = ir3_get_dst_ssa(ctx, &instr->def,
1374 instr->def.num_components);
1375 type_t type = (instr->def.bit_size < 32) ? TYPE_U16 : TYPE_U32;
1376
1377 for (int i = 0; i < instr->def.num_components; i++)
1378 dst[i] = create_immed_typed(ctx->block, instr->value.u32[i], type);
1379 }
1380
1381 static void
1382 emit_undef(struct ir3_context *ctx, nir_ssa_undef_instr *undef)
1383 {
1384 struct ir3_instruction **dst = ir3_get_dst_ssa(ctx, &undef->def,
1385 undef->def.num_components);
1386 type_t type = (undef->def.bit_size < 32) ? TYPE_U16 : TYPE_U32;
1387
1388 /* backend doesn't want undefined instructions, so just plug
1389 * in 0.0..
1390 */
1391 for (int i = 0; i < undef->def.num_components; i++)
1392 dst[i] = create_immed_typed(ctx->block, fui(0.0), type);
1393 }
1394
1395 /*
1396 * texture fetch/sample instructions:
1397 */
1398
1399 static void
1400 tex_info(nir_tex_instr *tex, unsigned *flagsp, unsigned *coordsp)
1401 {
1402 unsigned coords, flags = 0;
1403
1404 /* note: would use tex->coord_components.. except txs.. also,
1405 * since array index goes after shadow ref, we don't want to
1406 * count it:
1407 */
1408 switch (tex->sampler_dim) {
1409 case GLSL_SAMPLER_DIM_1D:
1410 case GLSL_SAMPLER_DIM_BUF:
1411 coords = 1;
1412 break;
1413 case GLSL_SAMPLER_DIM_2D:
1414 case GLSL_SAMPLER_DIM_RECT:
1415 case GLSL_SAMPLER_DIM_EXTERNAL:
1416 case GLSL_SAMPLER_DIM_MS:
1417 coords = 2;
1418 break;
1419 case GLSL_SAMPLER_DIM_3D:
1420 case GLSL_SAMPLER_DIM_CUBE:
1421 coords = 3;
1422 flags |= IR3_INSTR_3D;
1423 break;
1424 default:
1425 unreachable("bad sampler_dim");
1426 }
1427
1428 if (tex->is_shadow && tex->op != nir_texop_lod)
1429 flags |= IR3_INSTR_S;
1430
1431 if (tex->is_array && tex->op != nir_texop_lod)
1432 flags |= IR3_INSTR_A;
1433
1434 *flagsp = flags;
1435 *coordsp = coords;
1436 }
1437
1438 static void
1439 emit_tex(struct ir3_context *ctx, nir_tex_instr *tex)
1440 {
1441 struct ir3_block *b = ctx->block;
1442 struct ir3_instruction **dst, *sam, *src0[12], *src1[4];
1443 struct ir3_instruction * const *coord, * const *off, * const *ddx, * const *ddy;
1444 struct ir3_instruction *lod, *compare, *proj, *sample_index;
1445 bool has_bias = false, has_lod = false, has_proj = false, has_off = false;
1446 unsigned i, coords, flags, ncomp;
1447 unsigned nsrc0 = 0, nsrc1 = 0;
1448 type_t type;
1449 opc_t opc = 0;
1450
1451 ncomp = nir_dest_num_components(tex->dest);
1452
1453 coord = off = ddx = ddy = NULL;
1454 lod = proj = compare = sample_index = NULL;
1455
1456 dst = ir3_get_dst(ctx, &tex->dest, ncomp);
1457
1458 for (unsigned i = 0; i < tex->num_srcs; i++) {
1459 switch (tex->src[i].src_type) {
1460 case nir_tex_src_coord:
1461 coord = ir3_get_src(ctx, &tex->src[i].src);
1462 break;
1463 case nir_tex_src_bias:
1464 lod = ir3_get_src(ctx, &tex->src[i].src)[0];
1465 has_bias = true;
1466 break;
1467 case nir_tex_src_lod:
1468 lod = ir3_get_src(ctx, &tex->src[i].src)[0];
1469 has_lod = true;
1470 break;
1471 case nir_tex_src_comparator: /* shadow comparator */
1472 compare = ir3_get_src(ctx, &tex->src[i].src)[0];
1473 break;
1474 case nir_tex_src_projector:
1475 proj = ir3_get_src(ctx, &tex->src[i].src)[0];
1476 has_proj = true;
1477 break;
1478 case nir_tex_src_offset:
1479 off = ir3_get_src(ctx, &tex->src[i].src);
1480 has_off = true;
1481 break;
1482 case nir_tex_src_ddx:
1483 ddx = ir3_get_src(ctx, &tex->src[i].src);
1484 break;
1485 case nir_tex_src_ddy:
1486 ddy = ir3_get_src(ctx, &tex->src[i].src);
1487 break;
1488 case nir_tex_src_ms_index:
1489 sample_index = ir3_get_src(ctx, &tex->src[i].src)[0];
1490 break;
1491 default:
1492 ir3_context_error(ctx, "Unhandled NIR tex src type: %d\n",
1493 tex->src[i].src_type);
1494 return;
1495 }
1496 }
1497
1498 switch (tex->op) {
1499 case nir_texop_tex: opc = has_lod ? OPC_SAML : OPC_SAM; break;
1500 case nir_texop_txb: opc = OPC_SAMB; break;
1501 case nir_texop_txl: opc = OPC_SAML; break;
1502 case nir_texop_txd: opc = OPC_SAMGQ; break;
1503 case nir_texop_txf: opc = OPC_ISAML; break;
1504 case nir_texop_lod: opc = OPC_GETLOD; break;
1505 case nir_texop_tg4:
1506 /* NOTE: a4xx might need to emulate gather w/ txf (this is
1507 * what blob does, seems gather is broken?), and a3xx did
1508 * not support it (but probably could also emulate).
1509 */
1510 switch (tex->component) {
1511 case 0: opc = OPC_GATHER4R; break;
1512 case 1: opc = OPC_GATHER4G; break;
1513 case 2: opc = OPC_GATHER4B; break;
1514 case 3: opc = OPC_GATHER4A; break;
1515 }
1516 break;
1517 case nir_texop_txf_ms: opc = OPC_ISAMM; break;
1518 case nir_texop_txs:
1519 case nir_texop_query_levels:
1520 case nir_texop_texture_samples:
1521 case nir_texop_samples_identical:
1522 case nir_texop_txf_ms_mcs:
1523 ir3_context_error(ctx, "Unhandled NIR tex type: %d\n", tex->op);
1524 return;
1525 }
1526
1527 tex_info(tex, &flags, &coords);
1528
1529 /*
1530 * lay out the first argument in the proper order:
1531 * - actual coordinates first
1532 * - shadow reference
1533 * - array index
1534 * - projection w
1535 * - starting at offset 4, dpdx.xy, dpdy.xy
1536 *
1537 * bias/lod go into the second arg
1538 */
1539
1540 /* insert tex coords: */
1541 for (i = 0; i < coords; i++)
1542 src0[i] = coord[i];
1543
1544 nsrc0 = i;
1545
1546 /* NOTE a3xx (and possibly a4xx?) might be different, using isaml
1547 * with scaled x coord according to requested sample:
1548 */
1549 if (tex->op == nir_texop_txf_ms) {
1550 if (ctx->compiler->txf_ms_with_isaml) {
1551 /* the samples are laid out in x dimension as
1552 * 0 1 2 3
1553 * x_ms = (x << ms) + sample_index;
1554 */
1555 struct ir3_instruction *ms;
1556 ms = create_immed(b, (ctx->samples >> (2 * tex->texture_index)) & 3);
1557
1558 src0[0] = ir3_SHL_B(b, src0[0], 0, ms, 0);
1559 src0[0] = ir3_ADD_U(b, src0[0], 0, sample_index, 0);
1560
1561 opc = OPC_ISAML;
1562 } else {
1563 src0[nsrc0++] = sample_index;
1564 }
1565 }
1566
1567 /* scale up integer coords for TXF based on the LOD */
1568 if (ctx->compiler->unminify_coords && (opc == OPC_ISAML)) {
1569 assert(has_lod);
1570 for (i = 0; i < coords; i++)
1571 src0[i] = ir3_SHL_B(b, src0[i], 0, lod, 0);
1572 }
1573
1574 if (coords == 1) {
1575 /* hw doesn't do 1d, so we treat it as 2d with
1576 * height of 1, and patch up the y coord.
1577 */
1578 switch (opc) {
1579 case OPC_ISAM:
1580 case OPC_ISAML:
1581 case OPC_ISAMM:
1582 /* These instructions expect integer coord: */
1583 src0[nsrc0++] = create_immed(b, 0);
1584 break;
1585 default:
1586 src0[nsrc0++] = create_immed(b, fui(0.5));
1587 break;
1588 }
1589 }
1590
1591 if (tex->is_shadow && tex->op != nir_texop_lod)
1592 src0[nsrc0++] = compare;
1593
1594 if (tex->is_array && tex->op != nir_texop_lod) {
1595 struct ir3_instruction *idx = coord[coords];
1596
1597 /* the array coord for cube arrays needs 0.5 added to it */
1598 if (ctx->compiler->array_index_add_half && (opc != OPC_ISAML))
1599 idx = ir3_ADD_F(b, idx, 0, create_immed(b, fui(0.5)), 0);
1600
1601 src0[nsrc0++] = idx;
1602 }
1603
1604 if (has_proj) {
1605 src0[nsrc0++] = proj;
1606 flags |= IR3_INSTR_P;
1607 }
1608
1609 /* pad to 4, then ddx/ddy: */
1610 if (tex->op == nir_texop_txd) {
1611 while (nsrc0 < 4)
1612 src0[nsrc0++] = create_immed(b, fui(0.0));
1613 for (i = 0; i < coords; i++)
1614 src0[nsrc0++] = ddx[i];
1615 if (coords < 2)
1616 src0[nsrc0++] = create_immed(b, fui(0.0));
1617 for (i = 0; i < coords; i++)
1618 src0[nsrc0++] = ddy[i];
1619 if (coords < 2)
1620 src0[nsrc0++] = create_immed(b, fui(0.0));
1621 }
1622
1623 /*
1624 * second argument (if applicable):
1625 * - offsets
1626 * - lod
1627 * - bias
1628 */
1629 if (has_off | has_lod | has_bias) {
1630 if (has_off) {
1631 unsigned off_coords = coords;
1632 if (tex->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
1633 off_coords--;
1634 for (i = 0; i < off_coords; i++)
1635 src1[nsrc1++] = off[i];
1636 if (off_coords < 2)
1637 src1[nsrc1++] = create_immed(b, fui(0.0));
1638 flags |= IR3_INSTR_O;
1639 }
1640
1641 if (has_lod | has_bias)
1642 src1[nsrc1++] = lod;
1643 }
1644
1645 switch (tex->dest_type) {
1646 case nir_type_invalid:
1647 case nir_type_float:
1648 type = TYPE_F32;
1649 break;
1650 case nir_type_int:
1651 type = TYPE_S32;
1652 break;
1653 case nir_type_uint:
1654 case nir_type_bool:
1655 type = TYPE_U32;
1656 break;
1657 default:
1658 unreachable("bad dest_type");
1659 }
1660
1661 if (opc == OPC_GETLOD)
1662 type = TYPE_U32;
1663
1664 unsigned tex_idx = tex->texture_index;
1665
1666 ctx->max_texture_index = MAX2(ctx->max_texture_index, tex_idx);
1667
1668 struct ir3_instruction *col0 = ir3_create_collect(ctx, src0, nsrc0);
1669 struct ir3_instruction *col1 = ir3_create_collect(ctx, src1, nsrc1);
1670
1671 sam = ir3_SAM(b, opc, type, MASK(ncomp), flags,
1672 tex_idx, tex_idx, col0, col1);
1673
1674 if ((ctx->astc_srgb & (1 << tex_idx)) && !nir_tex_instr_is_query(tex)) {
1675 /* only need first 3 components: */
1676 sam->regs[0]->wrmask = 0x7;
1677 ir3_split_dest(b, dst, sam, 0, 3);
1678
1679 /* we need to sample the alpha separately with a non-ASTC
1680 * texture state:
1681 */
1682 sam = ir3_SAM(b, opc, type, 0b1000, flags,
1683 tex_idx, tex_idx, col0, col1);
1684
1685 array_insert(ctx->ir, ctx->ir->astc_srgb, sam);
1686
1687 /* fixup .w component: */
1688 ir3_split_dest(b, &dst[3], sam, 3, 1);
1689 } else {
1690 /* normal (non-workaround) case: */
1691 ir3_split_dest(b, dst, sam, 0, ncomp);
1692 }
1693
1694 /* GETLOD returns results in 4.8 fixed point */
1695 if (opc == OPC_GETLOD) {
1696 struct ir3_instruction *factor = create_immed(b, fui(1.0 / 256));
1697
1698 compile_assert(ctx, tex->dest_type == nir_type_float);
1699 for (i = 0; i < 2; i++) {
1700 dst[i] = ir3_MUL_F(b, ir3_COV(b, dst[i], TYPE_U32, TYPE_F32), 0,
1701 factor, 0);
1702 }
1703 }
1704
1705 ir3_put_dst(ctx, &tex->dest);
1706 }
1707
1708 static void
1709 emit_tex_query_levels(struct ir3_context *ctx, nir_tex_instr *tex)
1710 {
1711 struct ir3_block *b = ctx->block;
1712 struct ir3_instruction **dst, *sam;
1713
1714 dst = ir3_get_dst(ctx, &tex->dest, 1);
1715
1716 sam = ir3_SAM(b, OPC_GETINFO, TYPE_U32, 0b0100, 0,
1717 tex->texture_index, tex->texture_index, NULL, NULL);
1718
1719 /* even though there is only one component, since it ends
1720 * up in .z rather than .x, we need a split_dest()
1721 */
1722 ir3_split_dest(b, dst, sam, 0, 3);
1723
1724 /* The # of levels comes from getinfo.z. We need to add 1 to it, since
1725 * the value in TEX_CONST_0 is zero-based.
1726 */
1727 if (ctx->compiler->levels_add_one)
1728 dst[0] = ir3_ADD_U(b, dst[0], 0, create_immed(b, 1), 0);
1729
1730 ir3_put_dst(ctx, &tex->dest);
1731 }
1732
1733 static void
1734 emit_tex_txs(struct ir3_context *ctx, nir_tex_instr *tex)
1735 {
1736 struct ir3_block *b = ctx->block;
1737 struct ir3_instruction **dst, *sam;
1738 struct ir3_instruction *lod;
1739 unsigned flags, coords;
1740
1741 tex_info(tex, &flags, &coords);
1742
1743 /* Actually we want the number of dimensions, not coordinates. This
1744 * distinction only matters for cubes.
1745 */
1746 if (tex->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
1747 coords = 2;
1748
1749 dst = ir3_get_dst(ctx, &tex->dest, 4);
1750
1751 compile_assert(ctx, tex->num_srcs == 1);
1752 compile_assert(ctx, tex->src[0].src_type == nir_tex_src_lod);
1753
1754 lod = ir3_get_src(ctx, &tex->src[0].src)[0];
1755
1756 sam = ir3_SAM(b, OPC_GETSIZE, TYPE_U32, 0b1111, flags,
1757 tex->texture_index, tex->texture_index, lod, NULL);
1758
1759 ir3_split_dest(b, dst, sam, 0, 4);
1760
1761 /* Array size actually ends up in .w rather than .z. This doesn't
1762 * matter for miplevel 0, but for higher mips the value in z is
1763 * minified whereas w stays. Also, the value in TEX_CONST_3_DEPTH is
1764 * returned, which means that we have to add 1 to it for arrays.
1765 */
1766 if (tex->is_array) {
1767 if (ctx->compiler->levels_add_one) {
1768 dst[coords] = ir3_ADD_U(b, dst[3], 0, create_immed(b, 1), 0);
1769 } else {
1770 dst[coords] = ir3_MOV(b, dst[3], TYPE_U32);
1771 }
1772 }
1773
1774 ir3_put_dst(ctx, &tex->dest);
1775 }
1776
1777 static void
1778 emit_jump(struct ir3_context *ctx, nir_jump_instr *jump)
1779 {
1780 switch (jump->type) {
1781 case nir_jump_break:
1782 case nir_jump_continue:
1783 case nir_jump_return:
1784 /* I *think* we can simply just ignore this, and use the
1785 * successor block link to figure out where we need to
1786 * jump to for break/continue
1787 */
1788 break;
1789 default:
1790 ir3_context_error(ctx, "Unhandled NIR jump type: %d\n", jump->type);
1791 break;
1792 }
1793 }
1794
1795 static void
1796 emit_instr(struct ir3_context *ctx, nir_instr *instr)
1797 {
1798 switch (instr->type) {
1799 case nir_instr_type_alu:
1800 emit_alu(ctx, nir_instr_as_alu(instr));
1801 break;
1802 case nir_instr_type_deref:
1803 /* ignored, handled as part of the intrinsic they are src to */
1804 break;
1805 case nir_instr_type_intrinsic:
1806 emit_intrinsic(ctx, nir_instr_as_intrinsic(instr));
1807 break;
1808 case nir_instr_type_load_const:
1809 emit_load_const(ctx, nir_instr_as_load_const(instr));
1810 break;
1811 case nir_instr_type_ssa_undef:
1812 emit_undef(ctx, nir_instr_as_ssa_undef(instr));
1813 break;
1814 case nir_instr_type_tex: {
1815 nir_tex_instr *tex = nir_instr_as_tex(instr);
1816 /* couple tex instructions get special-cased:
1817 */
1818 switch (tex->op) {
1819 case nir_texop_txs:
1820 emit_tex_txs(ctx, tex);
1821 break;
1822 case nir_texop_query_levels:
1823 emit_tex_query_levels(ctx, tex);
1824 break;
1825 default:
1826 emit_tex(ctx, tex);
1827 break;
1828 }
1829 break;
1830 }
1831 case nir_instr_type_jump:
1832 emit_jump(ctx, nir_instr_as_jump(instr));
1833 break;
1834 case nir_instr_type_phi:
1835 /* we have converted phi webs to regs in NIR by now */
1836 ir3_context_error(ctx, "Unexpected NIR instruction type: %d\n", instr->type);
1837 break;
1838 case nir_instr_type_call:
1839 case nir_instr_type_parallel_copy:
1840 ir3_context_error(ctx, "Unhandled NIR instruction type: %d\n", instr->type);
1841 break;
1842 }
1843 }
1844
1845 static struct ir3_block *
1846 get_block(struct ir3_context *ctx, const nir_block *nblock)
1847 {
1848 struct ir3_block *block;
1849 struct hash_entry *hentry;
1850 unsigned i;
1851
1852 hentry = _mesa_hash_table_search(ctx->block_ht, nblock);
1853 if (hentry)
1854 return hentry->data;
1855
1856 block = ir3_block_create(ctx->ir);
1857 block->nblock = nblock;
1858 _mesa_hash_table_insert(ctx->block_ht, nblock, block);
1859
1860 block->predecessors_count = nblock->predecessors->entries;
1861 block->predecessors = ralloc_array_size(block,
1862 sizeof(block->predecessors[0]), block->predecessors_count);
1863 i = 0;
1864 set_foreach(nblock->predecessors, sentry) {
1865 block->predecessors[i++] = get_block(ctx, sentry->key);
1866 }
1867
1868 return block;
1869 }
1870
1871 static void
1872 emit_block(struct ir3_context *ctx, nir_block *nblock)
1873 {
1874 struct ir3_block *block = get_block(ctx, nblock);
1875
1876 for (int i = 0; i < ARRAY_SIZE(block->successors); i++) {
1877 if (nblock->successors[i]) {
1878 block->successors[i] =
1879 get_block(ctx, nblock->successors[i]);
1880 }
1881 }
1882
1883 ctx->block = block;
1884 list_addtail(&block->node, &ctx->ir->block_list);
1885
1886 /* re-emit addr register in each block if needed: */
1887 for (int i = 0; i < ARRAY_SIZE(ctx->addr_ht); i++) {
1888 _mesa_hash_table_destroy(ctx->addr_ht[i], NULL);
1889 ctx->addr_ht[i] = NULL;
1890 }
1891
1892 nir_foreach_instr(instr, nblock) {
1893 ctx->cur_instr = instr;
1894 emit_instr(ctx, instr);
1895 ctx->cur_instr = NULL;
1896 if (ctx->error)
1897 return;
1898 }
1899 }
1900
1901 static void emit_cf_list(struct ir3_context *ctx, struct exec_list *list);
1902
1903 static void
1904 emit_if(struct ir3_context *ctx, nir_if *nif)
1905 {
1906 struct ir3_instruction *condition = ir3_get_src(ctx, &nif->condition)[0];
1907
1908 ctx->block->condition =
1909 ir3_get_predicate(ctx, ir3_b2n(condition->block, condition));
1910
1911 emit_cf_list(ctx, &nif->then_list);
1912 emit_cf_list(ctx, &nif->else_list);
1913 }
1914
1915 static void
1916 emit_loop(struct ir3_context *ctx, nir_loop *nloop)
1917 {
1918 emit_cf_list(ctx, &nloop->body);
1919 }
1920
1921 static void
1922 stack_push(struct ir3_context *ctx)
1923 {
1924 ctx->stack++;
1925 ctx->max_stack = MAX2(ctx->max_stack, ctx->stack);
1926 }
1927
1928 static void
1929 stack_pop(struct ir3_context *ctx)
1930 {
1931 compile_assert(ctx, ctx->stack > 0);
1932 ctx->stack--;
1933 }
1934
1935 static void
1936 emit_cf_list(struct ir3_context *ctx, struct exec_list *list)
1937 {
1938 foreach_list_typed(nir_cf_node, node, node, list) {
1939 switch (node->type) {
1940 case nir_cf_node_block:
1941 emit_block(ctx, nir_cf_node_as_block(node));
1942 break;
1943 case nir_cf_node_if:
1944 stack_push(ctx);
1945 emit_if(ctx, nir_cf_node_as_if(node));
1946 stack_pop(ctx);
1947 break;
1948 case nir_cf_node_loop:
1949 stack_push(ctx);
1950 emit_loop(ctx, nir_cf_node_as_loop(node));
1951 stack_pop(ctx);
1952 break;
1953 case nir_cf_node_function:
1954 ir3_context_error(ctx, "TODO\n");
1955 break;
1956 }
1957 }
1958 }
1959
1960 /* emit stream-out code. At this point, the current block is the original
1961 * (nir) end block, and nir ensures that all flow control paths terminate
1962 * into the end block. We re-purpose the original end block to generate
1963 * the 'if (vtxcnt < maxvtxcnt)' condition, then append the conditional
1964 * block holding stream-out write instructions, followed by the new end
1965 * block:
1966 *
1967 * blockOrigEnd {
1968 * p0.x = (vtxcnt < maxvtxcnt)
1969 * // succs: blockStreamOut, blockNewEnd
1970 * }
1971 * blockStreamOut {
1972 * ... stream-out instructions ...
1973 * // succs: blockNewEnd
1974 * }
1975 * blockNewEnd {
1976 * }
1977 */
1978 static void
1979 emit_stream_out(struct ir3_context *ctx)
1980 {
1981 struct ir3_shader_variant *v = ctx->so;
1982 struct ir3 *ir = ctx->ir;
1983 struct ir3_stream_output_info *strmout =
1984 &ctx->so->shader->stream_output;
1985 struct ir3_block *orig_end_block, *stream_out_block, *new_end_block;
1986 struct ir3_instruction *vtxcnt, *maxvtxcnt, *cond;
1987 struct ir3_instruction *bases[IR3_MAX_SO_BUFFERS];
1988
1989 /* create vtxcnt input in input block at top of shader,
1990 * so that it is seen as live over the entire duration
1991 * of the shader:
1992 */
1993 vtxcnt = create_input(ctx, 0);
1994 add_sysval_input(ctx, SYSTEM_VALUE_VERTEX_CNT, vtxcnt);
1995
1996 maxvtxcnt = create_driver_param(ctx, IR3_DP_VTXCNT_MAX);
1997
1998 /* at this point, we are at the original 'end' block,
1999 * re-purpose this block to stream-out condition, then
2000 * append stream-out block and new-end block
2001 */
2002 orig_end_block = ctx->block;
2003
2004 // TODO these blocks need to update predecessors..
2005 // maybe w/ store_global intrinsic, we could do this
2006 // stuff in nir->nir pass
2007
2008 stream_out_block = ir3_block_create(ir);
2009 list_addtail(&stream_out_block->node, &ir->block_list);
2010
2011 new_end_block = ir3_block_create(ir);
2012 list_addtail(&new_end_block->node, &ir->block_list);
2013
2014 orig_end_block->successors[0] = stream_out_block;
2015 orig_end_block->successors[1] = new_end_block;
2016 stream_out_block->successors[0] = new_end_block;
2017
2018 /* setup 'if (vtxcnt < maxvtxcnt)' condition: */
2019 cond = ir3_CMPS_S(ctx->block, vtxcnt, 0, maxvtxcnt, 0);
2020 cond->regs[0]->num = regid(REG_P0, 0);
2021 cond->cat2.condition = IR3_COND_LT;
2022
2023 /* condition goes on previous block to the conditional,
2024 * since it is used to pick which of the two successor
2025 * paths to take:
2026 */
2027 orig_end_block->condition = cond;
2028
2029 /* switch to stream_out_block to generate the stream-out
2030 * instructions:
2031 */
2032 ctx->block = stream_out_block;
2033
2034 /* Calculate base addresses based on vtxcnt. Instructions
2035 * generated for bases not used in following loop will be
2036 * stripped out in the backend.
2037 */
2038 for (unsigned i = 0; i < IR3_MAX_SO_BUFFERS; i++) {
2039 unsigned stride = strmout->stride[i];
2040 struct ir3_instruction *base, *off;
2041
2042 base = create_uniform(ctx->block, regid(v->constbase.tfbo, i));
2043
2044 /* 24-bit should be enough: */
2045 off = ir3_MUL_U(ctx->block, vtxcnt, 0,
2046 create_immed(ctx->block, stride * 4), 0);
2047
2048 bases[i] = ir3_ADD_S(ctx->block, off, 0, base, 0);
2049 }
2050
2051 /* Generate the per-output store instructions: */
2052 for (unsigned i = 0; i < strmout->num_outputs; i++) {
2053 for (unsigned j = 0; j < strmout->output[i].num_components; j++) {
2054 unsigned c = j + strmout->output[i].start_component;
2055 struct ir3_instruction *base, *out, *stg;
2056
2057 base = bases[strmout->output[i].output_buffer];
2058 out = ctx->ir->outputs[regid(strmout->output[i].register_index, c)];
2059
2060 stg = ir3_STG(ctx->block, base, 0, out, 0,
2061 create_immed(ctx->block, 1), 0);
2062 stg->cat6.type = TYPE_U32;
2063 stg->cat6.dst_offset = (strmout->output[i].dst_offset + j) * 4;
2064
2065 array_insert(ctx->block, ctx->block->keeps, stg);
2066 }
2067 }
2068
2069 /* and finally switch to the new_end_block: */
2070 ctx->block = new_end_block;
2071 }
2072
2073 static void
2074 emit_function(struct ir3_context *ctx, nir_function_impl *impl)
2075 {
2076 nir_metadata_require(impl, nir_metadata_block_index);
2077
2078 compile_assert(ctx, ctx->stack == 0);
2079
2080 emit_cf_list(ctx, &impl->body);
2081 emit_block(ctx, impl->end_block);
2082
2083 compile_assert(ctx, ctx->stack == 0);
2084
2085 /* at this point, we should have a single empty block,
2086 * into which we emit the 'end' instruction.
2087 */
2088 compile_assert(ctx, list_empty(&ctx->block->instr_list));
2089
2090 /* If stream-out (aka transform-feedback) enabled, emit the
2091 * stream-out instructions, followed by a new empty block (into
2092 * which the 'end' instruction lands).
2093 *
2094 * NOTE: it is done in this order, rather than inserting before
2095 * we emit end_block, because NIR guarantees that all blocks
2096 * flow into end_block, and that end_block has no successors.
2097 * So by re-purposing end_block as the first block of stream-
2098 * out, we guarantee that all exit paths flow into the stream-
2099 * out instructions.
2100 */
2101 if ((ctx->compiler->gpu_id < 500) &&
2102 (ctx->so->shader->stream_output.num_outputs > 0) &&
2103 !ctx->so->binning_pass) {
2104 debug_assert(ctx->so->type == MESA_SHADER_VERTEX);
2105 emit_stream_out(ctx);
2106 }
2107
2108 ir3_END(ctx->block);
2109 }
2110
2111 static struct ir3_instruction *
2112 create_frag_coord(struct ir3_context *ctx, unsigned comp)
2113 {
2114 struct ir3_block *block = ctx->block;
2115 struct ir3_instruction *instr;
2116
2117 if (!ctx->frag_coord) {
2118 ctx->frag_coord = create_input_compmask(ctx, 0, 0xf);
2119 /* defer add_sysval_input() until after all inputs created */
2120 }
2121
2122 ir3_split_dest(block, &instr, ctx->frag_coord, comp, 1);
2123
2124 switch (comp) {
2125 case 0: /* .x */
2126 case 1: /* .y */
2127 /* for frag_coord, we get unsigned values.. we need
2128 * to subtract (integer) 8 and divide by 16 (right-
2129 * shift by 4) then convert to float:
2130 *
2131 * sub.s tmp, src, 8
2132 * shr.b tmp, tmp, 4
2133 * mov.u32f32 dst, tmp
2134 *
2135 */
2136 instr = ir3_SUB_S(block, instr, 0,
2137 create_immed(block, 8), 0);
2138 instr = ir3_SHR_B(block, instr, 0,
2139 create_immed(block, 4), 0);
2140 instr = ir3_COV(block, instr, TYPE_U32, TYPE_F32);
2141
2142 return instr;
2143 case 2: /* .z */
2144 case 3: /* .w */
2145 default:
2146 /* seems that we can use these as-is: */
2147 return instr;
2148 }
2149 }
2150
2151 static void
2152 setup_input(struct ir3_context *ctx, nir_variable *in)
2153 {
2154 struct ir3_shader_variant *so = ctx->so;
2155 unsigned ncomp = glsl_get_components(in->type);
2156 unsigned n = in->data.driver_location;
2157 unsigned frac = in->data.location_frac;
2158 unsigned slot = in->data.location;
2159
2160 /* skip unread inputs, we could end up with (for example), unsplit
2161 * matrix/etc inputs in the case they are not read, so just silently
2162 * skip these.
2163 */
2164 if (ncomp > 4)
2165 return;
2166
2167 so->inputs[n].slot = slot;
2168 so->inputs[n].compmask = (1 << (ncomp + frac)) - 1;
2169 so->inputs_count = MAX2(so->inputs_count, n + 1);
2170 so->inputs[n].interpolate = in->data.interpolation;
2171
2172 if (ctx->so->type == MESA_SHADER_FRAGMENT) {
2173 for (int i = 0; i < ncomp; i++) {
2174 struct ir3_instruction *instr = NULL;
2175 unsigned idx = (n * 4) + i + frac;
2176
2177 if (slot == VARYING_SLOT_POS) {
2178 so->inputs[n].bary = false;
2179 so->frag_coord = true;
2180 instr = create_frag_coord(ctx, i);
2181 } else if (slot == VARYING_SLOT_PNTC) {
2182 /* see for example st_nir_fixup_varying_slots().. this is
2183 * maybe a bit mesa/st specific. But we need things to line
2184 * up for this in fdN_program:
2185 * unsigned texmask = 1 << (slot - VARYING_SLOT_VAR0);
2186 * if (emit->sprite_coord_enable & texmask) {
2187 * ...
2188 * }
2189 */
2190 so->inputs[n].slot = VARYING_SLOT_VAR8;
2191 so->inputs[n].bary = true;
2192 instr = create_frag_input(ctx, false);
2193 } else {
2194 bool use_ldlv = false;
2195
2196 /* detect the special case for front/back colors where
2197 * we need to do flat vs smooth shading depending on
2198 * rast state:
2199 */
2200 if (in->data.interpolation == INTERP_MODE_NONE) {
2201 switch (slot) {
2202 case VARYING_SLOT_COL0:
2203 case VARYING_SLOT_COL1:
2204 case VARYING_SLOT_BFC0:
2205 case VARYING_SLOT_BFC1:
2206 so->inputs[n].rasterflat = true;
2207 break;
2208 default:
2209 break;
2210 }
2211 }
2212
2213 if (ctx->compiler->flat_bypass) {
2214 if ((so->inputs[n].interpolate == INTERP_MODE_FLAT) ||
2215 (so->inputs[n].rasterflat && ctx->so->key.rasterflat))
2216 use_ldlv = true;
2217 }
2218
2219 so->inputs[n].bary = true;
2220
2221 instr = create_frag_input(ctx, use_ldlv);
2222 }
2223
2224 compile_assert(ctx, idx < ctx->ir->ninputs);
2225
2226 ctx->ir->inputs[idx] = instr;
2227 }
2228 } else if (ctx->so->type == MESA_SHADER_VERTEX) {
2229 for (int i = 0; i < ncomp; i++) {
2230 unsigned idx = (n * 4) + i + frac;
2231 compile_assert(ctx, idx < ctx->ir->ninputs);
2232 ctx->ir->inputs[idx] = create_input(ctx, idx);
2233 }
2234 } else {
2235 ir3_context_error(ctx, "unknown shader type: %d\n", ctx->so->type);
2236 }
2237
2238 if (so->inputs[n].bary || (ctx->so->type == MESA_SHADER_VERTEX)) {
2239 so->total_in += ncomp;
2240 }
2241 }
2242
2243 static void
2244 setup_output(struct ir3_context *ctx, nir_variable *out)
2245 {
2246 struct ir3_shader_variant *so = ctx->so;
2247 unsigned ncomp = glsl_get_components(out->type);
2248 unsigned n = out->data.driver_location;
2249 unsigned frac = out->data.location_frac;
2250 unsigned slot = out->data.location;
2251 unsigned comp = 0;
2252
2253 if (ctx->so->type == MESA_SHADER_FRAGMENT) {
2254 switch (slot) {
2255 case FRAG_RESULT_DEPTH:
2256 comp = 2; /* tgsi will write to .z component */
2257 so->writes_pos = true;
2258 break;
2259 case FRAG_RESULT_COLOR:
2260 so->color0_mrt = 1;
2261 break;
2262 default:
2263 if (slot >= FRAG_RESULT_DATA0)
2264 break;
2265 ir3_context_error(ctx, "unknown FS output name: %s\n",
2266 gl_frag_result_name(slot));
2267 }
2268 } else if (ctx->so->type == MESA_SHADER_VERTEX) {
2269 switch (slot) {
2270 case VARYING_SLOT_POS:
2271 so->writes_pos = true;
2272 break;
2273 case VARYING_SLOT_PSIZ:
2274 so->writes_psize = true;
2275 break;
2276 case VARYING_SLOT_COL0:
2277 case VARYING_SLOT_COL1:
2278 case VARYING_SLOT_BFC0:
2279 case VARYING_SLOT_BFC1:
2280 case VARYING_SLOT_FOGC:
2281 case VARYING_SLOT_CLIP_DIST0:
2282 case VARYING_SLOT_CLIP_DIST1:
2283 case VARYING_SLOT_CLIP_VERTEX:
2284 break;
2285 default:
2286 if (slot >= VARYING_SLOT_VAR0)
2287 break;
2288 if ((VARYING_SLOT_TEX0 <= slot) && (slot <= VARYING_SLOT_TEX7))
2289 break;
2290 ir3_context_error(ctx, "unknown VS output name: %s\n",
2291 gl_varying_slot_name(slot));
2292 }
2293 } else {
2294 ir3_context_error(ctx, "unknown shader type: %d\n", ctx->so->type);
2295 }
2296
2297 compile_assert(ctx, n < ARRAY_SIZE(so->outputs));
2298
2299 so->outputs[n].slot = slot;
2300 so->outputs[n].regid = regid(n, comp);
2301 so->outputs_count = MAX2(so->outputs_count, n + 1);
2302
2303 for (int i = 0; i < ncomp; i++) {
2304 unsigned idx = (n * 4) + i + frac;
2305 compile_assert(ctx, idx < ctx->ir->noutputs);
2306 ctx->ir->outputs[idx] = create_immed(ctx->block, fui(0.0));
2307 }
2308
2309 /* if varying packing doesn't happen, we could end up in a situation
2310 * with "holes" in the output, and since the per-generation code that
2311 * sets up varying linkage registers doesn't expect to have more than
2312 * one varying per vec4 slot, pad the holes.
2313 *
2314 * Note that this should probably generate a performance warning of
2315 * some sort.
2316 */
2317 for (int i = 0; i < frac; i++) {
2318 unsigned idx = (n * 4) + i;
2319 if (!ctx->ir->outputs[idx]) {
2320 ctx->ir->outputs[idx] = create_immed(ctx->block, fui(0.0));
2321 }
2322 }
2323 }
2324
2325 static int
2326 max_drvloc(struct exec_list *vars)
2327 {
2328 int drvloc = -1;
2329 nir_foreach_variable(var, vars) {
2330 drvloc = MAX2(drvloc, (int)var->data.driver_location);
2331 }
2332 return drvloc;
2333 }
2334
2335 static const unsigned max_sysvals[] = {
2336 [MESA_SHADER_FRAGMENT] = 24, // TODO
2337 [MESA_SHADER_VERTEX] = 16,
2338 [MESA_SHADER_COMPUTE] = 16, // TODO how many do we actually need?
2339 [MESA_SHADER_KERNEL] = 16, // TODO how many do we actually need?
2340 };
2341
2342 static void
2343 emit_instructions(struct ir3_context *ctx)
2344 {
2345 unsigned ninputs, noutputs;
2346 nir_function_impl *fxn = nir_shader_get_entrypoint(ctx->s);
2347
2348 ninputs = (max_drvloc(&ctx->s->inputs) + 1) * 4;
2349 noutputs = (max_drvloc(&ctx->s->outputs) + 1) * 4;
2350
2351 /* we need to leave room for sysvals:
2352 */
2353 ninputs += max_sysvals[ctx->so->type];
2354
2355 ctx->ir = ir3_create(ctx->compiler, ninputs, noutputs);
2356
2357 /* Create inputs in first block: */
2358 ctx->block = get_block(ctx, nir_start_block(fxn));
2359 ctx->in_block = ctx->block;
2360 list_addtail(&ctx->block->node, &ctx->ir->block_list);
2361
2362 ninputs -= max_sysvals[ctx->so->type];
2363
2364 /* for fragment shader, the vcoord input register is used as the
2365 * base for bary.f varying fetch instrs:
2366 */
2367 struct ir3_instruction *vcoord = NULL;
2368 if (ctx->so->type == MESA_SHADER_FRAGMENT) {
2369 struct ir3_instruction *xy[2];
2370
2371 vcoord = create_input_compmask(ctx, 0, 0x3);
2372 ir3_split_dest(ctx->block, xy, vcoord, 0, 2);
2373
2374 ctx->frag_vcoord = ir3_create_collect(ctx, xy, 2);
2375 }
2376
2377 /* Setup inputs: */
2378 nir_foreach_variable(var, &ctx->s->inputs) {
2379 setup_input(ctx, var);
2380 }
2381
2382 /* Defer add_sysval_input() stuff until after setup_inputs(),
2383 * because sysvals need to be appended after varyings:
2384 */
2385 if (vcoord) {
2386 add_sysval_input_compmask(ctx, SYSTEM_VALUE_VARYING_COORD,
2387 0x3, vcoord);
2388 }
2389
2390 if (ctx->frag_coord) {
2391 add_sysval_input_compmask(ctx, SYSTEM_VALUE_FRAG_COORD,
2392 0xf, ctx->frag_coord);
2393 }
2394
2395 /* Setup outputs: */
2396 nir_foreach_variable(var, &ctx->s->outputs) {
2397 setup_output(ctx, var);
2398 }
2399
2400 /* Setup registers (which should only be arrays): */
2401 nir_foreach_register(reg, &ctx->s->registers) {
2402 ir3_declare_array(ctx, reg);
2403 }
2404
2405 /* NOTE: need to do something more clever when we support >1 fxn */
2406 nir_foreach_register(reg, &fxn->registers) {
2407 ir3_declare_array(ctx, reg);
2408 }
2409 /* And emit the body: */
2410 ctx->impl = fxn;
2411 emit_function(ctx, fxn);
2412 }
2413
2414 /* from NIR perspective, we actually have varying inputs. But the varying
2415 * inputs, from an IR standpoint, are just bary.f/ldlv instructions. The
2416 * only actual inputs are the sysvals.
2417 */
2418 static void
2419 fixup_frag_inputs(struct ir3_context *ctx)
2420 {
2421 struct ir3_shader_variant *so = ctx->so;
2422 struct ir3 *ir = ctx->ir;
2423 unsigned i = 0;
2424
2425 /* sysvals should appear at the end of the inputs, drop everything else: */
2426 while ((i < so->inputs_count) && !so->inputs[i].sysval)
2427 i++;
2428
2429 /* at IR level, inputs are always blocks of 4 scalars: */
2430 i *= 4;
2431
2432 ir->inputs = &ir->inputs[i];
2433 ir->ninputs -= i;
2434 }
2435
2436 /* Fixup tex sampler state for astc/srgb workaround instructions. We
2437 * need to assign the tex state indexes for these after we know the
2438 * max tex index.
2439 */
2440 static void
2441 fixup_astc_srgb(struct ir3_context *ctx)
2442 {
2443 struct ir3_shader_variant *so = ctx->so;
2444 /* indexed by original tex idx, value is newly assigned alpha sampler
2445 * state tex idx. Zero is invalid since there is at least one sampler
2446 * if we get here.
2447 */
2448 unsigned alt_tex_state[16] = {0};
2449 unsigned tex_idx = ctx->max_texture_index + 1;
2450 unsigned idx = 0;
2451
2452 so->astc_srgb.base = tex_idx;
2453
2454 for (unsigned i = 0; i < ctx->ir->astc_srgb_count; i++) {
2455 struct ir3_instruction *sam = ctx->ir->astc_srgb[i];
2456
2457 compile_assert(ctx, sam->cat5.tex < ARRAY_SIZE(alt_tex_state));
2458
2459 if (alt_tex_state[sam->cat5.tex] == 0) {
2460 /* assign new alternate/alpha tex state slot: */
2461 alt_tex_state[sam->cat5.tex] = tex_idx++;
2462 so->astc_srgb.orig_idx[idx++] = sam->cat5.tex;
2463 so->astc_srgb.count++;
2464 }
2465
2466 sam->cat5.tex = alt_tex_state[sam->cat5.tex];
2467 }
2468 }
2469
2470 static void
2471 fixup_binning_pass(struct ir3_context *ctx)
2472 {
2473 struct ir3_shader_variant *so = ctx->so;
2474 struct ir3 *ir = ctx->ir;
2475 unsigned i, j;
2476
2477 for (i = 0, j = 0; i < so->outputs_count; i++) {
2478 unsigned slot = so->outputs[i].slot;
2479
2480 /* throw away everything but first position/psize */
2481 if ((slot == VARYING_SLOT_POS) || (slot == VARYING_SLOT_PSIZ)) {
2482 if (i != j) {
2483 so->outputs[j] = so->outputs[i];
2484 ir->outputs[(j*4)+0] = ir->outputs[(i*4)+0];
2485 ir->outputs[(j*4)+1] = ir->outputs[(i*4)+1];
2486 ir->outputs[(j*4)+2] = ir->outputs[(i*4)+2];
2487 ir->outputs[(j*4)+3] = ir->outputs[(i*4)+3];
2488 }
2489 j++;
2490 }
2491 }
2492 so->outputs_count = j;
2493 ir->noutputs = j * 4;
2494 }
2495
2496 int
2497 ir3_compile_shader_nir(struct ir3_compiler *compiler,
2498 struct ir3_shader_variant *so)
2499 {
2500 struct ir3_context *ctx;
2501 struct ir3 *ir;
2502 struct ir3_instruction **inputs;
2503 unsigned i, actual_in, inloc;
2504 int ret = 0, max_bary;
2505
2506 assert(!so->ir);
2507
2508 ctx = ir3_context_init(compiler, so);
2509 if (!ctx) {
2510 DBG("INIT failed!");
2511 ret = -1;
2512 goto out;
2513 }
2514
2515 emit_instructions(ctx);
2516
2517 if (ctx->error) {
2518 DBG("EMIT failed!");
2519 ret = -1;
2520 goto out;
2521 }
2522
2523 ir = so->ir = ctx->ir;
2524
2525 /* keep track of the inputs from TGSI perspective.. */
2526 inputs = ir->inputs;
2527
2528 /* but fixup actual inputs for frag shader: */
2529 if (so->type == MESA_SHADER_FRAGMENT)
2530 fixup_frag_inputs(ctx);
2531
2532 /* at this point, for binning pass, throw away unneeded outputs: */
2533 if (so->binning_pass && (ctx->compiler->gpu_id < 600))
2534 fixup_binning_pass(ctx);
2535
2536 /* if we want half-precision outputs, mark the output registers
2537 * as half:
2538 */
2539 if (so->key.half_precision) {
2540 for (i = 0; i < ir->noutputs; i++) {
2541 struct ir3_instruction *out = ir->outputs[i];
2542
2543 if (!out)
2544 continue;
2545
2546 /* if frag shader writes z, that needs to be full precision: */
2547 if (so->outputs[i/4].slot == FRAG_RESULT_DEPTH)
2548 continue;
2549
2550 out->regs[0]->flags |= IR3_REG_HALF;
2551 /* output could be a fanout (ie. texture fetch output)
2552 * in which case we need to propagate the half-reg flag
2553 * up to the definer so that RA sees it:
2554 */
2555 if (out->opc == OPC_META_FO) {
2556 out = out->regs[1]->instr;
2557 out->regs[0]->flags |= IR3_REG_HALF;
2558 }
2559
2560 if (out->opc == OPC_MOV) {
2561 out->cat1.dst_type = half_type(out->cat1.dst_type);
2562 }
2563 }
2564 }
2565
2566 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2567 printf("BEFORE CP:\n");
2568 ir3_print(ir);
2569 }
2570
2571 ir3_cp(ir, so);
2572
2573 /* at this point, for binning pass, throw away unneeded outputs:
2574 * Note that for a6xx and later, we do this after ir3_cp to ensure
2575 * that the uniform/constant layout for BS and VS matches, so that
2576 * we can re-use same VS_CONST state group.
2577 */
2578 if (so->binning_pass && (ctx->compiler->gpu_id >= 600))
2579 fixup_binning_pass(ctx);
2580
2581 /* Insert mov if there's same instruction for each output.
2582 * eg. dEQP-GLES31.functional.shaders.opaque_type_indexing.sampler.const_expression.vertex.sampler2dshadow
2583 */
2584 for (int i = ir->noutputs - 1; i >= 0; i--) {
2585 if (!ir->outputs[i])
2586 continue;
2587 for (unsigned j = 0; j < i; j++) {
2588 if (ir->outputs[i] == ir->outputs[j]) {
2589 ir->outputs[i] =
2590 ir3_MOV(ir->outputs[i]->block, ir->outputs[i], TYPE_F32);
2591 }
2592 }
2593 }
2594
2595 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2596 printf("BEFORE GROUPING:\n");
2597 ir3_print(ir);
2598 }
2599
2600 ir3_sched_add_deps(ir);
2601
2602 /* Group left/right neighbors, inserting mov's where needed to
2603 * solve conflicts:
2604 */
2605 ir3_group(ir);
2606
2607 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2608 printf("AFTER GROUPING:\n");
2609 ir3_print(ir);
2610 }
2611
2612 ir3_depth(ir);
2613
2614 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2615 printf("AFTER DEPTH:\n");
2616 ir3_print(ir);
2617 }
2618
2619 ret = ir3_sched(ir);
2620 if (ret) {
2621 DBG("SCHED failed!");
2622 goto out;
2623 }
2624
2625 if (compiler->gpu_id >= 600) {
2626 ir3_a6xx_fixup_atomic_dests(ir, so);
2627 }
2628
2629 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2630 printf("AFTER SCHED:\n");
2631 ir3_print(ir);
2632 }
2633
2634 ret = ir3_ra(ir, so->type, so->frag_coord, so->frag_face);
2635 if (ret) {
2636 DBG("RA failed!");
2637 goto out;
2638 }
2639
2640 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2641 printf("AFTER RA:\n");
2642 ir3_print(ir);
2643 }
2644
2645 /* fixup input/outputs: */
2646 for (i = 0; i < so->outputs_count; i++) {
2647 /* sometimes we get outputs that don't write the .x coord, like:
2648 *
2649 * decl_var shader_out INTERP_MODE_NONE float Color (VARYING_SLOT_VAR9.z, 1, 0)
2650 *
2651 * Presumably the result of varying packing and then eliminating
2652 * some unneeded varyings? Just skip head to the first valid
2653 * component of the output.
2654 */
2655 for (unsigned j = 0; j < 4; j++) {
2656 struct ir3_instruction *instr = ir->outputs[(i*4) + j];
2657 if (instr) {
2658 so->outputs[i].regid = instr->regs[0]->num;
2659 break;
2660 }
2661 }
2662 }
2663
2664 /* Note that some or all channels of an input may be unused: */
2665 actual_in = 0;
2666 inloc = 0;
2667 for (i = 0; i < so->inputs_count; i++) {
2668 unsigned j, reg = regid(63,0), compmask = 0, maxcomp = 0;
2669 so->inputs[i].ncomp = 0;
2670 so->inputs[i].inloc = inloc;
2671 for (j = 0; j < 4; j++) {
2672 struct ir3_instruction *in = inputs[(i*4) + j];
2673 if (in && !(in->flags & IR3_INSTR_UNUSED)) {
2674 compmask |= (1 << j);
2675 reg = in->regs[0]->num - j;
2676 actual_in++;
2677 so->inputs[i].ncomp++;
2678 if ((so->type == MESA_SHADER_FRAGMENT) && so->inputs[i].bary) {
2679 /* assign inloc: */
2680 assert(in->regs[1]->flags & IR3_REG_IMMED);
2681 in->regs[1]->iim_val = inloc + j;
2682 maxcomp = j + 1;
2683 }
2684 }
2685 }
2686 if ((so->type == MESA_SHADER_FRAGMENT) && compmask && so->inputs[i].bary) {
2687 so->varying_in++;
2688 so->inputs[i].compmask = (1 << maxcomp) - 1;
2689 inloc += maxcomp;
2690 } else if (!so->inputs[i].sysval) {
2691 so->inputs[i].compmask = compmask;
2692 }
2693 so->inputs[i].regid = reg;
2694 }
2695
2696 if (ctx->astc_srgb)
2697 fixup_astc_srgb(ctx);
2698
2699 /* We need to do legalize after (for frag shader's) the "bary.f"
2700 * offsets (inloc) have been assigned.
2701 */
2702 ir3_legalize(ir, &so->num_samp, &so->has_ssbo, &max_bary);
2703
2704 if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
2705 printf("AFTER LEGALIZE:\n");
2706 ir3_print(ir);
2707 }
2708
2709 so->branchstack = ctx->max_stack;
2710
2711 /* Note that actual_in counts inputs that are not bary.f'd for FS: */
2712 if (so->type == MESA_SHADER_VERTEX)
2713 so->total_in = actual_in;
2714 else
2715 so->total_in = max_bary + 1;
2716
2717 out:
2718 if (ret) {
2719 if (so->ir)
2720 ir3_destroy(so->ir);
2721 so->ir = NULL;
2722 }
2723 ir3_context_free(ctx);
2724
2725 return ret;
2726 }