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radeonsi: use si_get_indirect_index for TEMP indexing
[mesa.git] / src / gallium / drivers / radeonsi / si_shader_tgsi_setup.c
1 /*
2 * Copyright 2016 Advanced Micro Devices, Inc.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include "si_shader_internal.h"
25 #include "si_pipe.h"
26
27 #include "gallivm/lp_bld_const.h"
28 #include "gallivm/lp_bld_gather.h"
29 #include "gallivm/lp_bld_flow.h"
30 #include "gallivm/lp_bld_init.h"
31 #include "gallivm/lp_bld_intr.h"
32 #include "gallivm/lp_bld_misc.h"
33 #include "gallivm/lp_bld_swizzle.h"
34 #include "tgsi/tgsi_info.h"
35 #include "tgsi/tgsi_parse.h"
36 #include "util/u_math.h"
37 #include "util/u_memory.h"
38 #include "util/u_debug.h"
39
40 #include <stdio.h>
41 #include <llvm-c/Transforms/IPO.h>
42 #include <llvm-c/Transforms/Scalar.h>
43
44 /* Data for if/else/endif and bgnloop/endloop control flow structures.
45 */
46 struct si_llvm_flow {
47 /* Loop exit or next part of if/else/endif. */
48 LLVMBasicBlockRef next_block;
49 LLVMBasicBlockRef loop_entry_block;
50 };
51
52 enum si_llvm_calling_convention {
53 RADEON_LLVM_AMDGPU_VS = 87,
54 RADEON_LLVM_AMDGPU_GS = 88,
55 RADEON_LLVM_AMDGPU_PS = 89,
56 RADEON_LLVM_AMDGPU_CS = 90,
57 RADEON_LLVM_AMDGPU_HS = 93,
58 };
59
60 void si_llvm_add_attribute(LLVMValueRef F, const char *name, int value)
61 {
62 char str[16];
63
64 snprintf(str, sizeof(str), "%i", value);
65 LLVMAddTargetDependentFunctionAttr(F, name, str);
66 }
67
68 struct si_llvm_diagnostics {
69 struct pipe_debug_callback *debug;
70 unsigned retval;
71 };
72
73 static void si_diagnostic_handler(LLVMDiagnosticInfoRef di, void *context)
74 {
75 struct si_llvm_diagnostics *diag = (struct si_llvm_diagnostics *)context;
76 LLVMDiagnosticSeverity severity = LLVMGetDiagInfoSeverity(di);
77 char *description = LLVMGetDiagInfoDescription(di);
78 const char *severity_str = NULL;
79
80 switch (severity) {
81 case LLVMDSError:
82 severity_str = "error";
83 break;
84 case LLVMDSWarning:
85 severity_str = "warning";
86 break;
87 case LLVMDSRemark:
88 severity_str = "remark";
89 break;
90 case LLVMDSNote:
91 severity_str = "note";
92 break;
93 default:
94 severity_str = "unknown";
95 }
96
97 pipe_debug_message(diag->debug, SHADER_INFO,
98 "LLVM diagnostic (%s): %s", severity_str, description);
99
100 if (severity == LLVMDSError) {
101 diag->retval = 1;
102 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", description);
103 }
104
105 LLVMDisposeMessage(description);
106 }
107
108 /**
109 * Compile an LLVM module to machine code.
110 *
111 * @returns 0 for success, 1 for failure
112 */
113 unsigned si_llvm_compile(LLVMModuleRef M, struct ac_shader_binary *binary,
114 LLVMTargetMachineRef tm,
115 struct pipe_debug_callback *debug)
116 {
117 struct si_llvm_diagnostics diag;
118 char *err;
119 LLVMContextRef llvm_ctx;
120 LLVMMemoryBufferRef out_buffer;
121 unsigned buffer_size;
122 const char *buffer_data;
123 LLVMBool mem_err;
124
125 diag.debug = debug;
126 diag.retval = 0;
127
128 /* Setup Diagnostic Handler*/
129 llvm_ctx = LLVMGetModuleContext(M);
130
131 LLVMContextSetDiagnosticHandler(llvm_ctx, si_diagnostic_handler, &diag);
132
133 /* Compile IR*/
134 mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
135 &out_buffer);
136
137 /* Process Errors/Warnings */
138 if (mem_err) {
139 fprintf(stderr, "%s: %s", __FUNCTION__, err);
140 pipe_debug_message(debug, SHADER_INFO,
141 "LLVM emit error: %s", err);
142 FREE(err);
143 diag.retval = 1;
144 goto out;
145 }
146
147 /* Extract Shader Code*/
148 buffer_size = LLVMGetBufferSize(out_buffer);
149 buffer_data = LLVMGetBufferStart(out_buffer);
150
151 if (!ac_elf_read(buffer_data, buffer_size, binary)) {
152 fprintf(stderr, "radeonsi: cannot read an ELF shader binary\n");
153 diag.retval = 1;
154 }
155
156 /* Clean up */
157 LLVMDisposeMemoryBuffer(out_buffer);
158
159 out:
160 if (diag.retval != 0)
161 pipe_debug_message(debug, SHADER_INFO, "LLVM compile failed");
162 return diag.retval;
163 }
164
165 LLVMTypeRef tgsi2llvmtype(struct lp_build_tgsi_context *bld_base,
166 enum tgsi_opcode_type type)
167 {
168 LLVMContextRef ctx = bld_base->base.gallivm->context;
169
170 switch (type) {
171 case TGSI_TYPE_UNSIGNED:
172 case TGSI_TYPE_SIGNED:
173 return LLVMInt32TypeInContext(ctx);
174 case TGSI_TYPE_UNSIGNED64:
175 case TGSI_TYPE_SIGNED64:
176 return LLVMInt64TypeInContext(ctx);
177 case TGSI_TYPE_DOUBLE:
178 return LLVMDoubleTypeInContext(ctx);
179 case TGSI_TYPE_UNTYPED:
180 case TGSI_TYPE_FLOAT:
181 return LLVMFloatTypeInContext(ctx);
182 default: break;
183 }
184 return 0;
185 }
186
187 LLVMValueRef bitcast(struct lp_build_tgsi_context *bld_base,
188 enum tgsi_opcode_type type, LLVMValueRef value)
189 {
190 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
191 LLVMTypeRef dst_type = tgsi2llvmtype(bld_base, type);
192
193 if (dst_type)
194 return LLVMBuildBitCast(builder, value, dst_type, "");
195 else
196 return value;
197 }
198
199 /**
200 * Return a value that is equal to the given i32 \p index if it lies in [0,num)
201 * or an undefined value in the same interval otherwise.
202 */
203 LLVMValueRef si_llvm_bound_index(struct si_shader_context *ctx,
204 LLVMValueRef index,
205 unsigned num)
206 {
207 struct gallivm_state *gallivm = &ctx->gallivm;
208 LLVMBuilderRef builder = gallivm->builder;
209 LLVMValueRef c_max = LLVMConstInt(ctx->i32, num - 1, 0);
210 LLVMValueRef cc;
211
212 if (util_is_power_of_two(num)) {
213 index = LLVMBuildAnd(builder, index, c_max, "");
214 } else {
215 /* In theory, this MAX pattern should result in code that is
216 * as good as the bit-wise AND above.
217 *
218 * In practice, LLVM generates worse code (at the time of
219 * writing), because its value tracking is not strong enough.
220 */
221 cc = LLVMBuildICmp(builder, LLVMIntULE, index, c_max, "");
222 index = LLVMBuildSelect(builder, cc, index, c_max, "");
223 }
224
225 return index;
226 }
227
228 static struct si_llvm_flow *
229 get_current_flow(struct si_shader_context *ctx)
230 {
231 if (ctx->flow_depth > 0)
232 return &ctx->flow[ctx->flow_depth - 1];
233 return NULL;
234 }
235
236 static struct si_llvm_flow *
237 get_innermost_loop(struct si_shader_context *ctx)
238 {
239 for (unsigned i = ctx->flow_depth; i > 0; --i) {
240 if (ctx->flow[i - 1].loop_entry_block)
241 return &ctx->flow[i - 1];
242 }
243 return NULL;
244 }
245
246 static struct si_llvm_flow *
247 push_flow(struct si_shader_context *ctx)
248 {
249 struct si_llvm_flow *flow;
250
251 if (ctx->flow_depth >= ctx->flow_depth_max) {
252 unsigned new_max = MAX2(ctx->flow_depth << 1, RADEON_LLVM_INITIAL_CF_DEPTH);
253 ctx->flow = REALLOC(ctx->flow,
254 ctx->flow_depth_max * sizeof(*ctx->flow),
255 new_max * sizeof(*ctx->flow));
256 ctx->flow_depth_max = new_max;
257 }
258
259 flow = &ctx->flow[ctx->flow_depth];
260 ctx->flow_depth++;
261
262 flow->next_block = NULL;
263 flow->loop_entry_block = NULL;
264 return flow;
265 }
266
267 static LLVMValueRef emit_swizzle(struct lp_build_tgsi_context *bld_base,
268 LLVMValueRef value,
269 unsigned swizzle_x,
270 unsigned swizzle_y,
271 unsigned swizzle_z,
272 unsigned swizzle_w)
273 {
274 LLVMValueRef swizzles[4];
275 LLVMTypeRef i32t =
276 LLVMInt32TypeInContext(bld_base->base.gallivm->context);
277
278 swizzles[0] = LLVMConstInt(i32t, swizzle_x, 0);
279 swizzles[1] = LLVMConstInt(i32t, swizzle_y, 0);
280 swizzles[2] = LLVMConstInt(i32t, swizzle_z, 0);
281 swizzles[3] = LLVMConstInt(i32t, swizzle_w, 0);
282
283 return LLVMBuildShuffleVector(bld_base->base.gallivm->builder,
284 value,
285 LLVMGetUndef(LLVMTypeOf(value)),
286 LLVMConstVector(swizzles, 4), "");
287 }
288
289 /**
290 * Return the description of the array covering the given temporary register
291 * index.
292 */
293 static unsigned
294 get_temp_array_id(struct lp_build_tgsi_context *bld_base,
295 unsigned reg_index,
296 const struct tgsi_ind_register *reg)
297 {
298 struct si_shader_context *ctx = si_shader_context(bld_base);
299 unsigned num_arrays = ctx->bld_base.info->array_max[TGSI_FILE_TEMPORARY];
300 unsigned i;
301
302 if (reg && reg->ArrayID > 0 && reg->ArrayID <= num_arrays)
303 return reg->ArrayID;
304
305 for (i = 0; i < num_arrays; i++) {
306 const struct tgsi_array_info *array = &ctx->temp_arrays[i];
307
308 if (reg_index >= array->range.First && reg_index <= array->range.Last)
309 return i + 1;
310 }
311
312 return 0;
313 }
314
315 static struct tgsi_declaration_range
316 get_array_range(struct lp_build_tgsi_context *bld_base,
317 unsigned File, unsigned reg_index,
318 const struct tgsi_ind_register *reg)
319 {
320 struct si_shader_context *ctx = si_shader_context(bld_base);
321 struct tgsi_declaration_range range;
322
323 if (File == TGSI_FILE_TEMPORARY) {
324 unsigned array_id = get_temp_array_id(bld_base, reg_index, reg);
325 if (array_id)
326 return ctx->temp_arrays[array_id - 1].range;
327 }
328
329 range.First = 0;
330 range.Last = bld_base->info->file_max[File];
331 return range;
332 }
333
334 /**
335 * For indirect registers, construct a pointer directly to the requested
336 * element using getelementptr if possible.
337 *
338 * Returns NULL if the insertelement/extractelement fallback for array access
339 * must be used.
340 */
341 static LLVMValueRef
342 get_pointer_into_array(struct si_shader_context *ctx,
343 unsigned file,
344 unsigned swizzle,
345 unsigned reg_index,
346 const struct tgsi_ind_register *reg_indirect)
347 {
348 unsigned array_id;
349 struct tgsi_array_info *array;
350 struct gallivm_state *gallivm = &ctx->gallivm;
351 LLVMBuilderRef builder = gallivm->builder;
352 LLVMValueRef idxs[2];
353 LLVMValueRef index;
354 LLVMValueRef alloca;
355
356 if (file != TGSI_FILE_TEMPORARY)
357 return NULL;
358
359 array_id = get_temp_array_id(&ctx->bld_base, reg_index, reg_indirect);
360 if (!array_id)
361 return NULL;
362
363 alloca = ctx->temp_array_allocas[array_id - 1];
364 if (!alloca)
365 return NULL;
366
367 array = &ctx->temp_arrays[array_id - 1];
368
369 if (!(array->writemask & (1 << swizzle)))
370 return ctx->undef_alloca;
371
372 index = si_get_indirect_index(ctx, reg_indirect, 1,
373 reg_index - ctx->temp_arrays[array_id - 1].range.First);
374
375 /* Ensure that the index is within a valid range, to guard against
376 * VM faults and overwriting critical data (e.g. spilled resource
377 * descriptors).
378 *
379 * TODO It should be possible to avoid the additional instructions
380 * if LLVM is changed so that it guarantuees:
381 * 1. the scratch space descriptor isolates the current wave (this
382 * could even save the scratch offset SGPR at the cost of an
383 * additional SALU instruction)
384 * 2. the memory for allocas must be allocated at the _end_ of the
385 * scratch space (after spilled registers)
386 */
387 index = si_llvm_bound_index(ctx, index, array->range.Last - array->range.First + 1);
388
389 index = LLVMBuildMul(
390 builder, index,
391 LLVMConstInt(ctx->i32, util_bitcount(array->writemask), 0),
392 "");
393 index = LLVMBuildAdd(
394 builder, index,
395 LLVMConstInt(ctx->i32,
396 util_bitcount(array->writemask & ((1 << swizzle) - 1)), 0),
397 "");
398 idxs[0] = ctx->i32_0;
399 idxs[1] = index;
400 return LLVMBuildGEP(builder, alloca, idxs, 2, "");
401 }
402
403 LLVMValueRef
404 si_llvm_emit_fetch_64bit(struct lp_build_tgsi_context *bld_base,
405 enum tgsi_opcode_type type,
406 LLVMValueRef ptr,
407 LLVMValueRef ptr2)
408 {
409 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
410 LLVMValueRef result;
411
412 result = LLVMGetUndef(LLVMVectorType(LLVMIntTypeInContext(bld_base->base.gallivm->context, 32), bld_base->base.type.length * 2));
413
414 result = LLVMBuildInsertElement(builder,
415 result,
416 bitcast(bld_base, TGSI_TYPE_UNSIGNED, ptr),
417 bld_base->int_bld.zero, "");
418 result = LLVMBuildInsertElement(builder,
419 result,
420 bitcast(bld_base, TGSI_TYPE_UNSIGNED, ptr2),
421 bld_base->int_bld.one, "");
422 return bitcast(bld_base, type, result);
423 }
424
425 static LLVMValueRef
426 emit_array_fetch(struct lp_build_tgsi_context *bld_base,
427 unsigned File, enum tgsi_opcode_type type,
428 struct tgsi_declaration_range range,
429 unsigned swizzle)
430 {
431 struct si_shader_context *ctx = si_shader_context(bld_base);
432
433 LLVMBuilderRef builder = ctx->gallivm.builder;
434
435 unsigned i, size = range.Last - range.First + 1;
436 LLVMTypeRef vec = LLVMVectorType(tgsi2llvmtype(bld_base, type), size);
437 LLVMValueRef result = LLVMGetUndef(vec);
438
439 struct tgsi_full_src_register tmp_reg = {};
440 tmp_reg.Register.File = File;
441
442 for (i = 0; i < size; ++i) {
443 tmp_reg.Register.Index = i + range.First;
444 LLVMValueRef temp = si_llvm_emit_fetch(bld_base, &tmp_reg, type, swizzle);
445 result = LLVMBuildInsertElement(builder, result, temp,
446 LLVMConstInt(ctx->i32, i, 0), "array_vector");
447 }
448 return result;
449 }
450
451 static LLVMValueRef
452 load_value_from_array(struct lp_build_tgsi_context *bld_base,
453 unsigned file,
454 enum tgsi_opcode_type type,
455 unsigned swizzle,
456 unsigned reg_index,
457 const struct tgsi_ind_register *reg_indirect)
458 {
459 struct si_shader_context *ctx = si_shader_context(bld_base);
460 struct gallivm_state *gallivm = &ctx->gallivm;
461 LLVMBuilderRef builder = gallivm->builder;
462 LLVMValueRef ptr;
463
464 ptr = get_pointer_into_array(ctx, file, swizzle, reg_index, reg_indirect);
465 if (ptr) {
466 LLVMValueRef val = LLVMBuildLoad(builder, ptr, "");
467 if (tgsi_type_is_64bit(type)) {
468 LLVMValueRef ptr_hi, val_hi;
469 ptr_hi = LLVMBuildGEP(builder, ptr, &ctx->i32_1, 1, "");
470 val_hi = LLVMBuildLoad(builder, ptr_hi, "");
471 val = si_llvm_emit_fetch_64bit(bld_base, type, val, val_hi);
472 }
473
474 return val;
475 } else {
476 struct tgsi_declaration_range range =
477 get_array_range(bld_base, file, reg_index, reg_indirect);
478 LLVMValueRef index =
479 si_get_indirect_index(ctx, reg_indirect, 1, reg_index - range.First);
480 LLVMValueRef array =
481 emit_array_fetch(bld_base, file, type, range, swizzle);
482 return LLVMBuildExtractElement(builder, array, index, "");
483 }
484 }
485
486 static void
487 store_value_to_array(struct lp_build_tgsi_context *bld_base,
488 LLVMValueRef value,
489 unsigned file,
490 unsigned chan_index,
491 unsigned reg_index,
492 const struct tgsi_ind_register *reg_indirect)
493 {
494 struct si_shader_context *ctx = si_shader_context(bld_base);
495 struct gallivm_state *gallivm = &ctx->gallivm;
496 LLVMBuilderRef builder = gallivm->builder;
497 LLVMValueRef ptr;
498
499 ptr = get_pointer_into_array(ctx, file, chan_index, reg_index, reg_indirect);
500 if (ptr) {
501 LLVMBuildStore(builder, value, ptr);
502 } else {
503 unsigned i, size;
504 struct tgsi_declaration_range range = get_array_range(bld_base, file, reg_index, reg_indirect);
505 LLVMValueRef index = si_get_indirect_index(ctx, reg_indirect, 1, reg_index - range.First);
506 LLVMValueRef array =
507 emit_array_fetch(bld_base, file, TGSI_TYPE_FLOAT, range, chan_index);
508 LLVMValueRef temp_ptr;
509
510 array = LLVMBuildInsertElement(builder, array, value, index, "");
511
512 size = range.Last - range.First + 1;
513 for (i = 0; i < size; ++i) {
514 switch(file) {
515 case TGSI_FILE_OUTPUT:
516 temp_ptr = ctx->outputs[i + range.First][chan_index];
517 break;
518
519 case TGSI_FILE_TEMPORARY:
520 if (range.First + i >= ctx->temps_count)
521 continue;
522 temp_ptr = ctx->temps[(i + range.First) * TGSI_NUM_CHANNELS + chan_index];
523 break;
524
525 default:
526 continue;
527 }
528 value = LLVMBuildExtractElement(builder, array,
529 LLVMConstInt(ctx->i32, i, 0), "");
530 LLVMBuildStore(builder, value, temp_ptr);
531 }
532 }
533 }
534
535 /* If this is true, preload FS inputs at the beginning of shaders. Otherwise,
536 * reload them at each use. This must be true if the shader is using
537 * derivatives and KILL, because KILL can leave the WQM and then a lazy
538 * input load isn't in the WQM anymore.
539 */
540 static bool si_preload_fs_inputs(struct si_shader_context *ctx)
541 {
542 struct si_shader_selector *sel = ctx->shader->selector;
543
544 return sel->info.uses_derivatives &&
545 sel->info.uses_kill;
546 }
547
548 static LLVMValueRef
549 get_output_ptr(struct lp_build_tgsi_context *bld_base, unsigned index,
550 unsigned chan)
551 {
552 struct si_shader_context *ctx = si_shader_context(bld_base);
553
554 assert(index <= ctx->bld_base.info->file_max[TGSI_FILE_OUTPUT]);
555 return ctx->outputs[index][chan];
556 }
557
558 LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
559 const struct tgsi_full_src_register *reg,
560 enum tgsi_opcode_type type,
561 unsigned swizzle)
562 {
563 struct si_shader_context *ctx = si_shader_context(bld_base);
564 LLVMBuilderRef builder = ctx->gallivm.builder;
565 LLVMValueRef result = NULL, ptr, ptr2;
566
567 if (swizzle == ~0) {
568 LLVMValueRef values[TGSI_NUM_CHANNELS];
569 unsigned chan;
570 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
571 values[chan] = si_llvm_emit_fetch(bld_base, reg, type, chan);
572 }
573 return lp_build_gather_values(&ctx->gallivm, values,
574 TGSI_NUM_CHANNELS);
575 }
576
577 if (reg->Register.Indirect) {
578 LLVMValueRef load = load_value_from_array(bld_base, reg->Register.File, type,
579 swizzle, reg->Register.Index, &reg->Indirect);
580 return bitcast(bld_base, type, load);
581 }
582
583 switch(reg->Register.File) {
584 case TGSI_FILE_IMMEDIATE: {
585 LLVMTypeRef ctype = tgsi2llvmtype(bld_base, type);
586 if (tgsi_type_is_64bit(type)) {
587 result = LLVMGetUndef(LLVMVectorType(ctx->i32, bld_base->base.type.length * 2));
588 result = LLVMConstInsertElement(result,
589 ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle],
590 ctx->i32_0);
591 result = LLVMConstInsertElement(result,
592 ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle + 1],
593 ctx->i32_1);
594 return LLVMConstBitCast(result, ctype);
595 } else {
596 return LLVMConstBitCast(ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle], ctype);
597 }
598 }
599
600 case TGSI_FILE_INPUT: {
601 unsigned index = reg->Register.Index;
602 LLVMValueRef input[4];
603
604 /* I don't think doing this for vertex shaders is beneficial.
605 * For those, we want to make sure the VMEM loads are executed
606 * only once. Fragment shaders don't care much, because
607 * v_interp instructions are much cheaper than VMEM loads.
608 */
609 if (!si_preload_fs_inputs(ctx) &&
610 ctx->bld_base.info->processor == PIPE_SHADER_FRAGMENT)
611 ctx->load_input(ctx, index, &ctx->input_decls[index], input);
612 else
613 memcpy(input, &ctx->inputs[index * 4], sizeof(input));
614
615 result = input[swizzle];
616
617 if (tgsi_type_is_64bit(type)) {
618 ptr = result;
619 ptr2 = input[swizzle + 1];
620 return si_llvm_emit_fetch_64bit(bld_base, type, ptr, ptr2);
621 }
622 break;
623 }
624
625 case TGSI_FILE_TEMPORARY:
626 if (reg->Register.Index >= ctx->temps_count)
627 return LLVMGetUndef(tgsi2llvmtype(bld_base, type));
628 ptr = ctx->temps[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle];
629 if (tgsi_type_is_64bit(type)) {
630 ptr2 = ctx->temps[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle + 1];
631 return si_llvm_emit_fetch_64bit(bld_base, type,
632 LLVMBuildLoad(builder, ptr, ""),
633 LLVMBuildLoad(builder, ptr2, ""));
634 }
635 result = LLVMBuildLoad(builder, ptr, "");
636 break;
637
638 case TGSI_FILE_OUTPUT:
639 ptr = get_output_ptr(bld_base, reg->Register.Index, swizzle);
640 if (tgsi_type_is_64bit(type)) {
641 ptr2 = get_output_ptr(bld_base, reg->Register.Index, swizzle + 1);
642 return si_llvm_emit_fetch_64bit(bld_base, type,
643 LLVMBuildLoad(builder, ptr, ""),
644 LLVMBuildLoad(builder, ptr2, ""));
645 }
646 result = LLVMBuildLoad(builder, ptr, "");
647 break;
648
649 default:
650 return LLVMGetUndef(tgsi2llvmtype(bld_base, type));
651 }
652
653 return bitcast(bld_base, type, result);
654 }
655
656 static LLVMValueRef fetch_system_value(struct lp_build_tgsi_context *bld_base,
657 const struct tgsi_full_src_register *reg,
658 enum tgsi_opcode_type type,
659 unsigned swizzle)
660 {
661 struct si_shader_context *ctx = si_shader_context(bld_base);
662 LLVMBuilderRef builder = ctx->gallivm.builder;
663 LLVMValueRef cval = ctx->system_values[reg->Register.Index];
664
665 if (tgsi_type_is_64bit(type)) {
666 LLVMValueRef lo, hi;
667
668 assert(swizzle == 0 || swizzle == 2);
669
670 lo = LLVMBuildExtractElement(
671 builder, cval, LLVMConstInt(ctx->i32, swizzle, 0), "");
672 hi = LLVMBuildExtractElement(
673 builder, cval, LLVMConstInt(ctx->i32, swizzle + 1, 0), "");
674
675 return si_llvm_emit_fetch_64bit(bld_base, type, lo, hi);
676 }
677
678 if (LLVMGetTypeKind(LLVMTypeOf(cval)) == LLVMVectorTypeKind) {
679 cval = LLVMBuildExtractElement(
680 builder, cval, LLVMConstInt(ctx->i32, swizzle, 0), "");
681 } else {
682 assert(swizzle == 0);
683 }
684
685 return bitcast(bld_base, type, cval);
686 }
687
688 static void emit_declaration(struct lp_build_tgsi_context *bld_base,
689 const struct tgsi_full_declaration *decl)
690 {
691 struct si_shader_context *ctx = si_shader_context(bld_base);
692 LLVMBuilderRef builder = ctx->gallivm.builder;
693 unsigned first, last, i;
694 switch(decl->Declaration.File) {
695 case TGSI_FILE_ADDRESS:
696 {
697 unsigned idx;
698 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
699 unsigned chan;
700 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
701 ctx->addrs[idx][chan] = lp_build_alloca_undef(
702 &ctx->gallivm,
703 ctx->i32, "");
704 }
705 }
706 break;
707 }
708
709 case TGSI_FILE_TEMPORARY:
710 {
711 char name[16] = "";
712 LLVMValueRef array_alloca = NULL;
713 unsigned decl_size;
714 unsigned writemask = decl->Declaration.UsageMask;
715 first = decl->Range.First;
716 last = decl->Range.Last;
717 decl_size = 4 * ((last - first) + 1);
718
719 if (decl->Declaration.Array) {
720 unsigned id = decl->Array.ArrayID - 1;
721 unsigned array_size;
722
723 writemask &= ctx->temp_arrays[id].writemask;
724 ctx->temp_arrays[id].writemask = writemask;
725 array_size = ((last - first) + 1) * util_bitcount(writemask);
726
727 /* If the array has more than 16 elements, store it
728 * in memory using an alloca that spans the entire
729 * array.
730 *
731 * Otherwise, store each array element individually.
732 * We will then generate vectors (per-channel, up to
733 * <16 x float> if the usagemask is a single bit) for
734 * indirect addressing.
735 *
736 * Note that 16 is the number of vector elements that
737 * LLVM will store in a register, so theoretically an
738 * array with up to 4 * 16 = 64 elements could be
739 * handled this way, but whether that's a good idea
740 * depends on VGPR register pressure elsewhere.
741 *
742 * FIXME: We shouldn't need to have the non-alloca
743 * code path for arrays. LLVM should be smart enough to
744 * promote allocas into registers when profitable.
745 */
746 if (array_size > 16 ||
747 !ctx->screen->llvm_has_working_vgpr_indexing) {
748 array_alloca = lp_build_alloca_undef(&ctx->gallivm,
749 LLVMArrayType(ctx->f32,
750 array_size), "array");
751 ctx->temp_array_allocas[id] = array_alloca;
752 }
753 }
754
755 if (!ctx->temps_count) {
756 ctx->temps_count = bld_base->info->file_max[TGSI_FILE_TEMPORARY] + 1;
757 ctx->temps = MALLOC(TGSI_NUM_CHANNELS * ctx->temps_count * sizeof(LLVMValueRef));
758 }
759 if (!array_alloca) {
760 for (i = 0; i < decl_size; ++i) {
761 #ifdef DEBUG
762 snprintf(name, sizeof(name), "TEMP%d.%c",
763 first + i / 4, "xyzw"[i % 4]);
764 #endif
765 ctx->temps[first * TGSI_NUM_CHANNELS + i] =
766 lp_build_alloca_undef(&ctx->gallivm,
767 ctx->f32,
768 name);
769 }
770 } else {
771 LLVMValueRef idxs[2] = {
772 ctx->i32_0,
773 NULL
774 };
775 unsigned j = 0;
776
777 if (writemask != TGSI_WRITEMASK_XYZW &&
778 !ctx->undef_alloca) {
779 /* Create a dummy alloca. We use it so that we
780 * have a pointer that is safe to load from if
781 * a shader ever reads from a channel that
782 * it never writes to.
783 */
784 ctx->undef_alloca = lp_build_alloca_undef(
785 &ctx->gallivm,
786 ctx->f32, "undef");
787 }
788
789 for (i = 0; i < decl_size; ++i) {
790 LLVMValueRef ptr;
791 if (writemask & (1 << (i % 4))) {
792 #ifdef DEBUG
793 snprintf(name, sizeof(name), "TEMP%d.%c",
794 first + i / 4, "xyzw"[i % 4]);
795 #endif
796 idxs[1] = LLVMConstInt(ctx->i32, j, 0);
797 ptr = LLVMBuildGEP(builder, array_alloca, idxs, 2, name);
798 j++;
799 } else {
800 ptr = ctx->undef_alloca;
801 }
802 ctx->temps[first * TGSI_NUM_CHANNELS + i] = ptr;
803 }
804 }
805 break;
806 }
807 case TGSI_FILE_INPUT:
808 {
809 unsigned idx;
810 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
811 if (ctx->load_input &&
812 ctx->input_decls[idx].Declaration.File != TGSI_FILE_INPUT) {
813 ctx->input_decls[idx] = *decl;
814 ctx->input_decls[idx].Range.First = idx;
815 ctx->input_decls[idx].Range.Last = idx;
816 ctx->input_decls[idx].Semantic.Index += idx - decl->Range.First;
817
818 if (si_preload_fs_inputs(ctx) ||
819 bld_base->info->processor != PIPE_SHADER_FRAGMENT)
820 ctx->load_input(ctx, idx, &ctx->input_decls[idx],
821 &ctx->inputs[idx * 4]);
822 }
823 }
824 }
825 break;
826
827 case TGSI_FILE_SYSTEM_VALUE:
828 {
829 unsigned idx;
830 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
831 si_load_system_value(ctx, idx, decl);
832 }
833 }
834 break;
835
836 case TGSI_FILE_OUTPUT:
837 {
838 char name[16] = "";
839 unsigned idx;
840 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
841 unsigned chan;
842 assert(idx < RADEON_LLVM_MAX_OUTPUTS);
843 if (ctx->outputs[idx][0])
844 continue;
845 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
846 #ifdef DEBUG
847 snprintf(name, sizeof(name), "OUT%d.%c",
848 idx, "xyzw"[chan % 4]);
849 #endif
850 ctx->outputs[idx][chan] = lp_build_alloca_undef(
851 &ctx->gallivm,
852 ctx->f32, name);
853 }
854 }
855 break;
856 }
857
858 case TGSI_FILE_MEMORY:
859 si_declare_compute_memory(ctx, decl);
860 break;
861
862 default:
863 break;
864 }
865 }
866
867 void si_llvm_emit_store(struct lp_build_tgsi_context *bld_base,
868 const struct tgsi_full_instruction *inst,
869 const struct tgsi_opcode_info *info,
870 unsigned index,
871 LLVMValueRef dst[4])
872 {
873 struct si_shader_context *ctx = si_shader_context(bld_base);
874 struct gallivm_state *gallivm = &ctx->gallivm;
875 const struct tgsi_full_dst_register *reg = &inst->Dst[index];
876 LLVMBuilderRef builder = ctx->gallivm.builder;
877 LLVMValueRef temp_ptr, temp_ptr2 = NULL;
878 bool is_vec_store = false;
879 enum tgsi_opcode_type dtype = tgsi_opcode_infer_dst_type(inst->Instruction.Opcode, index);
880
881 if (dst[0]) {
882 LLVMTypeKind k = LLVMGetTypeKind(LLVMTypeOf(dst[0]));
883 is_vec_store = (k == LLVMVectorTypeKind);
884 }
885
886 if (is_vec_store) {
887 LLVMValueRef values[4] = {};
888 uint32_t writemask = reg->Register.WriteMask;
889 while (writemask) {
890 unsigned chan = u_bit_scan(&writemask);
891 LLVMValueRef index = LLVMConstInt(ctx->i32, chan, 0);
892 values[chan] = LLVMBuildExtractElement(gallivm->builder,
893 dst[0], index, "");
894 }
895 bld_base->emit_store(bld_base, inst, info, index, values);
896 return;
897 }
898
899 uint32_t writemask = reg->Register.WriteMask;
900 while (writemask) {
901 unsigned chan_index = u_bit_scan(&writemask);
902 LLVMValueRef value = dst[chan_index];
903
904 if (tgsi_type_is_64bit(dtype) && (chan_index == 1 || chan_index == 3))
905 continue;
906 if (inst->Instruction.Saturate)
907 value = ac_build_clamp(&ctx->ac, value);
908
909 if (reg->Register.File == TGSI_FILE_ADDRESS) {
910 temp_ptr = ctx->addrs[reg->Register.Index][chan_index];
911 LLVMBuildStore(builder, value, temp_ptr);
912 continue;
913 }
914
915 if (!tgsi_type_is_64bit(dtype))
916 value = bitcast(bld_base, TGSI_TYPE_FLOAT, value);
917
918 if (reg->Register.Indirect) {
919 unsigned file = reg->Register.File;
920 unsigned reg_index = reg->Register.Index;
921 store_value_to_array(bld_base, value, file, chan_index,
922 reg_index, &reg->Indirect);
923 } else {
924 switch(reg->Register.File) {
925 case TGSI_FILE_OUTPUT:
926 temp_ptr = ctx->outputs[reg->Register.Index][chan_index];
927 if (tgsi_type_is_64bit(dtype))
928 temp_ptr2 = ctx->outputs[reg->Register.Index][chan_index + 1];
929 break;
930
931 case TGSI_FILE_TEMPORARY:
932 {
933 if (reg->Register.Index >= ctx->temps_count)
934 continue;
935
936 temp_ptr = ctx->temps[ TGSI_NUM_CHANNELS * reg->Register.Index + chan_index];
937 if (tgsi_type_is_64bit(dtype))
938 temp_ptr2 = ctx->temps[ TGSI_NUM_CHANNELS * reg->Register.Index + chan_index + 1];
939
940 break;
941 }
942 default:
943 return;
944 }
945 if (!tgsi_type_is_64bit(dtype))
946 LLVMBuildStore(builder, value, temp_ptr);
947 else {
948 LLVMValueRef ptr = LLVMBuildBitCast(builder, value,
949 LLVMVectorType(ctx->i32, 2), "");
950 LLVMValueRef val2;
951 value = LLVMBuildExtractElement(builder, ptr,
952 ctx->i32_0, "");
953 val2 = LLVMBuildExtractElement(builder, ptr,
954 ctx->i32_1, "");
955
956 LLVMBuildStore(builder, bitcast(bld_base, TGSI_TYPE_FLOAT, value), temp_ptr);
957 LLVMBuildStore(builder, bitcast(bld_base, TGSI_TYPE_FLOAT, val2), temp_ptr2);
958 }
959 }
960 }
961 }
962
963 static void set_basicblock_name(LLVMBasicBlockRef bb, const char *base, int pc)
964 {
965 char buf[32];
966 /* Subtract 1 so that the number shown is that of the corresponding
967 * opcode in the TGSI dump, e.g. an if block has the same suffix as
968 * the instruction number of the corresponding TGSI IF.
969 */
970 snprintf(buf, sizeof(buf), "%s%d", base, pc - 1);
971 LLVMSetValueName(LLVMBasicBlockAsValue(bb), buf);
972 }
973
974 /* Append a basic block at the level of the parent flow.
975 */
976 static LLVMBasicBlockRef append_basic_block(struct si_shader_context *ctx,
977 const char *name)
978 {
979 struct gallivm_state *gallivm = &ctx->gallivm;
980
981 assert(ctx->flow_depth >= 1);
982
983 if (ctx->flow_depth >= 2) {
984 struct si_llvm_flow *flow = &ctx->flow[ctx->flow_depth - 2];
985
986 return LLVMInsertBasicBlockInContext(gallivm->context,
987 flow->next_block, name);
988 }
989
990 return LLVMAppendBasicBlockInContext(gallivm->context, ctx->main_fn, name);
991 }
992
993 /* Emit a branch to the given default target for the current block if
994 * applicable -- that is, if the current block does not already contain a
995 * branch from a break or continue.
996 */
997 static void emit_default_branch(LLVMBuilderRef builder, LLVMBasicBlockRef target)
998 {
999 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder)))
1000 LLVMBuildBr(builder, target);
1001 }
1002
1003 static void bgnloop_emit(const struct lp_build_tgsi_action *action,
1004 struct lp_build_tgsi_context *bld_base,
1005 struct lp_build_emit_data *emit_data)
1006 {
1007 struct si_shader_context *ctx = si_shader_context(bld_base);
1008 struct gallivm_state *gallivm = &ctx->gallivm;
1009 struct si_llvm_flow *flow = push_flow(ctx);
1010 flow->loop_entry_block = append_basic_block(ctx, "LOOP");
1011 flow->next_block = append_basic_block(ctx, "ENDLOOP");
1012 set_basicblock_name(flow->loop_entry_block, "loop", bld_base->pc);
1013 LLVMBuildBr(gallivm->builder, flow->loop_entry_block);
1014 LLVMPositionBuilderAtEnd(gallivm->builder, flow->loop_entry_block);
1015 }
1016
1017 static void brk_emit(const struct lp_build_tgsi_action *action,
1018 struct lp_build_tgsi_context *bld_base,
1019 struct lp_build_emit_data *emit_data)
1020 {
1021 struct si_shader_context *ctx = si_shader_context(bld_base);
1022 struct gallivm_state *gallivm = &ctx->gallivm;
1023 struct si_llvm_flow *flow = get_innermost_loop(ctx);
1024
1025 LLVMBuildBr(gallivm->builder, flow->next_block);
1026 }
1027
1028 static void cont_emit(const struct lp_build_tgsi_action *action,
1029 struct lp_build_tgsi_context *bld_base,
1030 struct lp_build_emit_data *emit_data)
1031 {
1032 struct si_shader_context *ctx = si_shader_context(bld_base);
1033 struct gallivm_state *gallivm = &ctx->gallivm;
1034 struct si_llvm_flow *flow = get_innermost_loop(ctx);
1035
1036 LLVMBuildBr(gallivm->builder, flow->loop_entry_block);
1037 }
1038
1039 static void else_emit(const struct lp_build_tgsi_action *action,
1040 struct lp_build_tgsi_context *bld_base,
1041 struct lp_build_emit_data *emit_data)
1042 {
1043 struct si_shader_context *ctx = si_shader_context(bld_base);
1044 struct gallivm_state *gallivm = &ctx->gallivm;
1045 struct si_llvm_flow *current_branch = get_current_flow(ctx);
1046 LLVMBasicBlockRef endif_block;
1047
1048 assert(!current_branch->loop_entry_block);
1049
1050 endif_block = append_basic_block(ctx, "ENDIF");
1051 emit_default_branch(gallivm->builder, endif_block);
1052
1053 LLVMPositionBuilderAtEnd(gallivm->builder, current_branch->next_block);
1054 set_basicblock_name(current_branch->next_block, "else", bld_base->pc);
1055
1056 current_branch->next_block = endif_block;
1057 }
1058
1059 static void endif_emit(const struct lp_build_tgsi_action *action,
1060 struct lp_build_tgsi_context *bld_base,
1061 struct lp_build_emit_data *emit_data)
1062 {
1063 struct si_shader_context *ctx = si_shader_context(bld_base);
1064 struct gallivm_state *gallivm = &ctx->gallivm;
1065 struct si_llvm_flow *current_branch = get_current_flow(ctx);
1066
1067 assert(!current_branch->loop_entry_block);
1068
1069 emit_default_branch(gallivm->builder, current_branch->next_block);
1070 LLVMPositionBuilderAtEnd(gallivm->builder, current_branch->next_block);
1071 set_basicblock_name(current_branch->next_block, "endif", bld_base->pc);
1072
1073 ctx->flow_depth--;
1074 }
1075
1076 static void endloop_emit(const struct lp_build_tgsi_action *action,
1077 struct lp_build_tgsi_context *bld_base,
1078 struct lp_build_emit_data *emit_data)
1079 {
1080 struct si_shader_context *ctx = si_shader_context(bld_base);
1081 struct gallivm_state *gallivm = &ctx->gallivm;
1082 struct si_llvm_flow *current_loop = get_current_flow(ctx);
1083
1084 assert(current_loop->loop_entry_block);
1085
1086 emit_default_branch(gallivm->builder, current_loop->loop_entry_block);
1087
1088 LLVMPositionBuilderAtEnd(gallivm->builder, current_loop->next_block);
1089 set_basicblock_name(current_loop->next_block, "endloop", bld_base->pc);
1090 ctx->flow_depth--;
1091 }
1092
1093 static void if_cond_emit(const struct lp_build_tgsi_action *action,
1094 struct lp_build_tgsi_context *bld_base,
1095 struct lp_build_emit_data *emit_data,
1096 LLVMValueRef cond)
1097 {
1098 struct si_shader_context *ctx = si_shader_context(bld_base);
1099 struct gallivm_state *gallivm = &ctx->gallivm;
1100 struct si_llvm_flow *flow = push_flow(ctx);
1101 LLVMBasicBlockRef if_block;
1102
1103 if_block = append_basic_block(ctx, "IF");
1104 flow->next_block = append_basic_block(ctx, "ELSE");
1105 set_basicblock_name(if_block, "if", bld_base->pc);
1106 LLVMBuildCondBr(gallivm->builder, cond, if_block, flow->next_block);
1107 LLVMPositionBuilderAtEnd(gallivm->builder, if_block);
1108 }
1109
1110 static void if_emit(const struct lp_build_tgsi_action *action,
1111 struct lp_build_tgsi_context *bld_base,
1112 struct lp_build_emit_data *emit_data)
1113 {
1114 struct gallivm_state *gallivm = bld_base->base.gallivm;
1115 LLVMValueRef cond;
1116
1117 cond = LLVMBuildFCmp(gallivm->builder, LLVMRealUNE,
1118 emit_data->args[0],
1119 bld_base->base.zero, "");
1120
1121 if_cond_emit(action, bld_base, emit_data, cond);
1122 }
1123
1124 static void uif_emit(const struct lp_build_tgsi_action *action,
1125 struct lp_build_tgsi_context *bld_base,
1126 struct lp_build_emit_data *emit_data)
1127 {
1128 struct gallivm_state *gallivm = bld_base->base.gallivm;
1129 LLVMValueRef cond;
1130
1131 cond = LLVMBuildICmp(gallivm->builder, LLVMIntNE,
1132 bitcast(bld_base, TGSI_TYPE_UNSIGNED, emit_data->args[0]),
1133 bld_base->int_bld.zero, "");
1134
1135 if_cond_emit(action, bld_base, emit_data, cond);
1136 }
1137
1138 static void emit_immediate(struct lp_build_tgsi_context *bld_base,
1139 const struct tgsi_full_immediate *imm)
1140 {
1141 unsigned i;
1142 struct si_shader_context *ctx = si_shader_context(bld_base);
1143
1144 for (i = 0; i < 4; ++i) {
1145 ctx->imms[ctx->imms_num * TGSI_NUM_CHANNELS + i] =
1146 LLVMConstInt(ctx->i32, imm->u[i].Uint, false );
1147 }
1148
1149 ctx->imms_num++;
1150 }
1151
1152 void si_llvm_context_init(struct si_shader_context *ctx,
1153 struct si_screen *sscreen,
1154 LLVMTargetMachineRef tm)
1155 {
1156 struct lp_type type;
1157
1158 /* Initialize the gallivm object:
1159 * We are only using the module, context, and builder fields of this struct.
1160 * This should be enough for us to be able to pass our gallivm struct to the
1161 * helper functions in the gallivm module.
1162 */
1163 memset(ctx, 0, sizeof(*ctx));
1164 ctx->screen = sscreen;
1165 ctx->tm = tm;
1166
1167 ctx->gallivm.context = LLVMContextCreate();
1168 ctx->gallivm.module = LLVMModuleCreateWithNameInContext("tgsi",
1169 ctx->gallivm.context);
1170 LLVMSetTarget(ctx->gallivm.module, "amdgcn--");
1171
1172 LLVMTargetDataRef data_layout = LLVMCreateTargetDataLayout(tm);
1173 char *data_layout_str = LLVMCopyStringRepOfTargetData(data_layout);
1174 LLVMSetDataLayout(ctx->gallivm.module, data_layout_str);
1175 LLVMDisposeTargetData(data_layout);
1176 LLVMDisposeMessage(data_layout_str);
1177
1178 bool unsafe_fpmath = (sscreen->b.debug_flags & DBG_UNSAFE_MATH) != 0;
1179 enum lp_float_mode float_mode =
1180 unsafe_fpmath ? LP_FLOAT_MODE_UNSAFE_FP_MATH :
1181 LP_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH;
1182
1183 ctx->gallivm.builder = lp_create_builder(ctx->gallivm.context,
1184 float_mode);
1185
1186 ac_llvm_context_init(&ctx->ac, ctx->gallivm.context, sscreen->b.chip_class);
1187 ctx->ac.module = ctx->gallivm.module;
1188 ctx->ac.builder = ctx->gallivm.builder;
1189
1190 struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
1191
1192 type.floating = true;
1193 type.fixed = false;
1194 type.sign = true;
1195 type.norm = false;
1196 type.width = 32;
1197 type.length = 1;
1198
1199 lp_build_context_init(&bld_base->base, &ctx->gallivm, type);
1200 lp_build_context_init(&ctx->bld_base.uint_bld, &ctx->gallivm, lp_uint_type(type));
1201 lp_build_context_init(&ctx->bld_base.int_bld, &ctx->gallivm, lp_int_type(type));
1202 type.width *= 2;
1203 lp_build_context_init(&ctx->bld_base.dbl_bld, &ctx->gallivm, type);
1204 lp_build_context_init(&ctx->bld_base.uint64_bld, &ctx->gallivm, lp_uint_type(type));
1205 lp_build_context_init(&ctx->bld_base.int64_bld, &ctx->gallivm, lp_int_type(type));
1206
1207 bld_base->soa = 1;
1208 bld_base->emit_swizzle = emit_swizzle;
1209 bld_base->emit_declaration = emit_declaration;
1210 bld_base->emit_immediate = emit_immediate;
1211
1212 /* metadata allowing 2.5 ULP */
1213 ctx->fpmath_md_kind = LLVMGetMDKindIDInContext(ctx->gallivm.context,
1214 "fpmath", 6);
1215 LLVMValueRef arg = lp_build_const_float(&ctx->gallivm, 2.5);
1216 ctx->fpmath_md_2p5_ulp = LLVMMDNodeInContext(ctx->gallivm.context,
1217 &arg, 1);
1218
1219 bld_base->op_actions[TGSI_OPCODE_BGNLOOP].emit = bgnloop_emit;
1220 bld_base->op_actions[TGSI_OPCODE_BRK].emit = brk_emit;
1221 bld_base->op_actions[TGSI_OPCODE_CONT].emit = cont_emit;
1222 bld_base->op_actions[TGSI_OPCODE_IF].emit = if_emit;
1223 bld_base->op_actions[TGSI_OPCODE_UIF].emit = uif_emit;
1224 bld_base->op_actions[TGSI_OPCODE_ELSE].emit = else_emit;
1225 bld_base->op_actions[TGSI_OPCODE_ENDIF].emit = endif_emit;
1226 bld_base->op_actions[TGSI_OPCODE_ENDLOOP].emit = endloop_emit;
1227
1228 si_shader_context_init_alu(&ctx->bld_base);
1229 si_shader_context_init_mem(ctx);
1230
1231 ctx->voidt = LLVMVoidTypeInContext(ctx->gallivm.context);
1232 ctx->i1 = LLVMInt1TypeInContext(ctx->gallivm.context);
1233 ctx->i8 = LLVMInt8TypeInContext(ctx->gallivm.context);
1234 ctx->i32 = LLVMInt32TypeInContext(ctx->gallivm.context);
1235 ctx->i64 = LLVMInt64TypeInContext(ctx->gallivm.context);
1236 ctx->i128 = LLVMIntTypeInContext(ctx->gallivm.context, 128);
1237 ctx->f32 = LLVMFloatTypeInContext(ctx->gallivm.context);
1238 ctx->v2i32 = LLVMVectorType(ctx->i32, 2);
1239 ctx->v4i32 = LLVMVectorType(ctx->i32, 4);
1240 ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
1241 ctx->v8i32 = LLVMVectorType(ctx->i32, 8);
1242
1243 ctx->i32_0 = LLVMConstInt(ctx->i32, 0, 0);
1244 ctx->i32_1 = LLVMConstInt(ctx->i32, 1, 0);
1245 }
1246
1247 /* Set the context to a certain TGSI shader. Can be called repeatedly
1248 * to change the shader. */
1249 void si_llvm_context_set_tgsi(struct si_shader_context *ctx,
1250 struct si_shader *shader)
1251 {
1252 const struct tgsi_shader_info *info = NULL;
1253 const struct tgsi_token *tokens = NULL;
1254
1255 if (shader && shader->selector) {
1256 info = &shader->selector->info;
1257 tokens = shader->selector->tokens;
1258 }
1259
1260 ctx->shader = shader;
1261 ctx->type = info ? info->processor : -1;
1262 ctx->bld_base.info = info;
1263
1264 /* Clean up the old contents. */
1265 FREE(ctx->temp_arrays);
1266 ctx->temp_arrays = NULL;
1267 FREE(ctx->temp_array_allocas);
1268 ctx->temp_array_allocas = NULL;
1269
1270 FREE(ctx->imms);
1271 ctx->imms = NULL;
1272 ctx->imms_num = 0;
1273
1274 FREE(ctx->temps);
1275 ctx->temps = NULL;
1276 ctx->temps_count = 0;
1277
1278 if (!info || !tokens)
1279 return;
1280
1281 if (info->array_max[TGSI_FILE_TEMPORARY] > 0) {
1282 int size = info->array_max[TGSI_FILE_TEMPORARY];
1283
1284 ctx->temp_arrays = CALLOC(size, sizeof(ctx->temp_arrays[0]));
1285 ctx->temp_array_allocas = CALLOC(size, sizeof(ctx->temp_array_allocas[0]));
1286
1287 tgsi_scan_arrays(tokens, TGSI_FILE_TEMPORARY, size,
1288 ctx->temp_arrays);
1289 }
1290 if (info->file_max[TGSI_FILE_IMMEDIATE] >= 0) {
1291 int size = info->file_max[TGSI_FILE_IMMEDIATE] + 1;
1292 ctx->imms = MALLOC(size * TGSI_NUM_CHANNELS * sizeof(LLVMValueRef));
1293 }
1294
1295 /* Re-set these to start with a clean slate. */
1296 ctx->bld_base.num_instructions = 0;
1297 ctx->bld_base.pc = 0;
1298 memset(ctx->outputs, 0, sizeof(ctx->outputs));
1299
1300 ctx->bld_base.emit_store = si_llvm_emit_store;
1301 ctx->bld_base.emit_fetch_funcs[TGSI_FILE_IMMEDIATE] = si_llvm_emit_fetch;
1302 ctx->bld_base.emit_fetch_funcs[TGSI_FILE_INPUT] = si_llvm_emit_fetch;
1303 ctx->bld_base.emit_fetch_funcs[TGSI_FILE_TEMPORARY] = si_llvm_emit_fetch;
1304 ctx->bld_base.emit_fetch_funcs[TGSI_FILE_OUTPUT] = si_llvm_emit_fetch;
1305 ctx->bld_base.emit_fetch_funcs[TGSI_FILE_SYSTEM_VALUE] = fetch_system_value;
1306
1307 ctx->num_const_buffers = util_last_bit(info->const_buffers_declared);
1308 ctx->num_shader_buffers = util_last_bit(info->shader_buffers_declared);
1309 ctx->num_samplers = util_last_bit(info->samplers_declared);
1310 ctx->num_images = util_last_bit(info->images_declared);
1311 }
1312
1313 void si_llvm_create_func(struct si_shader_context *ctx,
1314 const char *name,
1315 LLVMTypeRef *return_types, unsigned num_return_elems,
1316 LLVMTypeRef *ParamTypes, unsigned ParamCount)
1317 {
1318 LLVMTypeRef main_fn_type, ret_type;
1319 LLVMBasicBlockRef main_fn_body;
1320 enum si_llvm_calling_convention call_conv;
1321 unsigned real_shader_type;
1322
1323 if (num_return_elems)
1324 ret_type = LLVMStructTypeInContext(ctx->gallivm.context,
1325 return_types,
1326 num_return_elems, true);
1327 else
1328 ret_type = LLVMVoidTypeInContext(ctx->gallivm.context);
1329
1330 /* Setup the function */
1331 ctx->return_type = ret_type;
1332 main_fn_type = LLVMFunctionType(ret_type, ParamTypes, ParamCount, 0);
1333 ctx->main_fn = LLVMAddFunction(ctx->gallivm.module, name, main_fn_type);
1334 main_fn_body = LLVMAppendBasicBlockInContext(ctx->gallivm.context,
1335 ctx->main_fn, "main_body");
1336 LLVMPositionBuilderAtEnd(ctx->gallivm.builder, main_fn_body);
1337
1338 real_shader_type = ctx->type;
1339
1340 /* LS is merged into HS (TCS), and ES is merged into GS. */
1341 if (ctx->screen->b.chip_class >= GFX9) {
1342 if (ctx->shader->key.as_ls)
1343 real_shader_type = PIPE_SHADER_TESS_CTRL;
1344 else if (ctx->shader->key.as_es)
1345 real_shader_type = PIPE_SHADER_GEOMETRY;
1346 }
1347
1348 switch (real_shader_type) {
1349 case PIPE_SHADER_VERTEX:
1350 case PIPE_SHADER_TESS_EVAL:
1351 call_conv = RADEON_LLVM_AMDGPU_VS;
1352 break;
1353 case PIPE_SHADER_TESS_CTRL:
1354 call_conv = HAVE_LLVM >= 0x0500 ? RADEON_LLVM_AMDGPU_HS :
1355 RADEON_LLVM_AMDGPU_VS;
1356 break;
1357 case PIPE_SHADER_GEOMETRY:
1358 call_conv = RADEON_LLVM_AMDGPU_GS;
1359 break;
1360 case PIPE_SHADER_FRAGMENT:
1361 call_conv = RADEON_LLVM_AMDGPU_PS;
1362 break;
1363 case PIPE_SHADER_COMPUTE:
1364 call_conv = RADEON_LLVM_AMDGPU_CS;
1365 break;
1366 default:
1367 unreachable("Unhandle shader type");
1368 }
1369
1370 LLVMSetFunctionCallConv(ctx->main_fn, call_conv);
1371 }
1372
1373 void si_llvm_optimize_module(struct si_shader_context *ctx)
1374 {
1375 struct gallivm_state *gallivm = &ctx->gallivm;
1376 const char *triple = LLVMGetTarget(gallivm->module);
1377 LLVMTargetLibraryInfoRef target_library_info;
1378
1379 /* Dump LLVM IR before any optimization passes */
1380 if (ctx->screen->b.debug_flags & DBG_PREOPT_IR &&
1381 si_can_dump_shader(&ctx->screen->b, ctx->type))
1382 LLVMDumpModule(ctx->gallivm.module);
1383
1384 /* Create the pass manager */
1385 gallivm->passmgr = LLVMCreatePassManager();
1386
1387 target_library_info = gallivm_create_target_library_info(triple);
1388 LLVMAddTargetLibraryInfo(target_library_info, gallivm->passmgr);
1389
1390 if (si_extra_shader_checks(&ctx->screen->b, ctx->type))
1391 LLVMAddVerifierPass(gallivm->passmgr);
1392
1393 LLVMAddAlwaysInlinerPass(gallivm->passmgr);
1394
1395 /* This pass should eliminate all the load and store instructions */
1396 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
1397
1398 /* Add some optimization passes */
1399 LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
1400 LLVMAddLICMPass(gallivm->passmgr);
1401 LLVMAddAggressiveDCEPass(gallivm->passmgr);
1402 LLVMAddCFGSimplificationPass(gallivm->passmgr);
1403 #if HAVE_LLVM >= 0x0400
1404 /* This is recommended by the instruction combining pass. */
1405 LLVMAddEarlyCSEMemSSAPass(gallivm->passmgr);
1406 #endif
1407 LLVMAddInstructionCombiningPass(gallivm->passmgr);
1408
1409 /* Run the pass */
1410 LLVMRunPassManager(gallivm->passmgr, ctx->gallivm.module);
1411
1412 LLVMDisposeBuilder(gallivm->builder);
1413 LLVMDisposePassManager(gallivm->passmgr);
1414 gallivm_dispose_target_library_info(target_library_info);
1415 }
1416
1417 void si_llvm_dispose(struct si_shader_context *ctx)
1418 {
1419 LLVMDisposeModule(ctx->gallivm.module);
1420 LLVMContextDispose(ctx->gallivm.context);
1421 FREE(ctx->temp_arrays);
1422 ctx->temp_arrays = NULL;
1423 FREE(ctx->temp_array_allocas);
1424 ctx->temp_array_allocas = NULL;
1425 FREE(ctx->temps);
1426 ctx->temps = NULL;
1427 ctx->temps_count = 0;
1428 FREE(ctx->imms);
1429 ctx->imms = NULL;
1430 ctx->imms_num = 0;
1431 FREE(ctx->flow);
1432 ctx->flow = NULL;
1433 ctx->flow_depth_max = 0;
1434 }