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radeonsi: remove a workaround for inexact *8_SNORM blits
[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 #include <llvm-c/Support.h>
44
45 /* Data for if/else/endif and bgnloop/endloop control flow structures.
46 */
47 struct si_llvm_flow {
48 /* Loop exit or next part of if/else/endif. */
49 LLVMBasicBlockRef next_block;
50 LLVMBasicBlockRef loop_entry_block;
51 };
52
53 #define CPU_STRING_LEN 30
54 #define FS_STRING_LEN 30
55 #define TRIPLE_STRING_LEN 7
56
57 /**
58 * Shader types for the LLVM backend.
59 */
60 enum si_llvm_shader_type {
61 RADEON_LLVM_SHADER_PS = 0,
62 RADEON_LLVM_SHADER_VS = 1,
63 RADEON_LLVM_SHADER_GS = 2,
64 RADEON_LLVM_SHADER_CS = 3,
65 };
66
67 enum si_llvm_calling_convention {
68 RADEON_LLVM_AMDGPU_VS = 87,
69 RADEON_LLVM_AMDGPU_GS = 88,
70 RADEON_LLVM_AMDGPU_PS = 89,
71 RADEON_LLVM_AMDGPU_CS = 90,
72 };
73
74 void si_llvm_add_attribute(LLVMValueRef F, const char *name, int value)
75 {
76 char str[16];
77
78 snprintf(str, sizeof(str), "%i", value);
79 LLVMAddTargetDependentFunctionAttr(F, name, str);
80 }
81
82 /**
83 * Set the shader type we want to compile
84 *
85 * @param type shader type to set
86 */
87 void si_llvm_shader_type(LLVMValueRef F, unsigned type)
88 {
89 enum si_llvm_shader_type llvm_type;
90 enum si_llvm_calling_convention calling_conv;
91
92 switch (type) {
93 case PIPE_SHADER_VERTEX:
94 case PIPE_SHADER_TESS_CTRL:
95 case PIPE_SHADER_TESS_EVAL:
96 llvm_type = RADEON_LLVM_SHADER_VS;
97 calling_conv = RADEON_LLVM_AMDGPU_VS;
98 break;
99 case PIPE_SHADER_GEOMETRY:
100 llvm_type = RADEON_LLVM_SHADER_GS;
101 calling_conv = RADEON_LLVM_AMDGPU_GS;
102 break;
103 case PIPE_SHADER_FRAGMENT:
104 llvm_type = RADEON_LLVM_SHADER_PS;
105 calling_conv = RADEON_LLVM_AMDGPU_PS;
106 break;
107 case PIPE_SHADER_COMPUTE:
108 llvm_type = RADEON_LLVM_SHADER_CS;
109 calling_conv = RADEON_LLVM_AMDGPU_CS;
110 break;
111 default:
112 unreachable("Unhandle shader type");
113 }
114
115 if (HAVE_LLVM >= 0x309)
116 LLVMSetFunctionCallConv(F, calling_conv);
117 else
118 si_llvm_add_attribute(F, "ShaderType", llvm_type);
119 }
120
121 static void init_amdgpu_target()
122 {
123 gallivm_init_llvm_targets();
124 LLVMInitializeAMDGPUTargetInfo();
125 LLVMInitializeAMDGPUTarget();
126 LLVMInitializeAMDGPUTargetMC();
127 LLVMInitializeAMDGPUAsmPrinter();
128
129 if (HAVE_LLVM >= 0x0400) {
130 /*
131 * Workaround for bug in llvm 4.0 that causes image intrinsics
132 * to disappear.
133 * https://reviews.llvm.org/D26348
134 */
135 const char *argv[2] = {"mesa", "-simplifycfg-sink-common=false"};
136 LLVMParseCommandLineOptions(2, argv, NULL);
137 }
138 }
139
140 static once_flag init_amdgpu_target_once_flag = ONCE_FLAG_INIT;
141
142 LLVMTargetRef si_llvm_get_amdgpu_target(const char *triple)
143 {
144 LLVMTargetRef target = NULL;
145 char *err_message = NULL;
146
147 call_once(&init_amdgpu_target_once_flag, init_amdgpu_target);
148
149 if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
150 fprintf(stderr, "Cannot find target for triple %s ", triple);
151 if (err_message) {
152 fprintf(stderr, "%s\n", err_message);
153 }
154 LLVMDisposeMessage(err_message);
155 return NULL;
156 }
157 return target;
158 }
159
160 struct si_llvm_diagnostics {
161 struct pipe_debug_callback *debug;
162 unsigned retval;
163 };
164
165 static void si_diagnostic_handler(LLVMDiagnosticInfoRef di, void *context)
166 {
167 struct si_llvm_diagnostics *diag = (struct si_llvm_diagnostics *)context;
168 LLVMDiagnosticSeverity severity = LLVMGetDiagInfoSeverity(di);
169 char *description = LLVMGetDiagInfoDescription(di);
170 const char *severity_str = NULL;
171
172 switch (severity) {
173 case LLVMDSError:
174 severity_str = "error";
175 break;
176 case LLVMDSWarning:
177 severity_str = "warning";
178 break;
179 case LLVMDSRemark:
180 severity_str = "remark";
181 break;
182 case LLVMDSNote:
183 severity_str = "note";
184 break;
185 default:
186 severity_str = "unknown";
187 }
188
189 pipe_debug_message(diag->debug, SHADER_INFO,
190 "LLVM diagnostic (%s): %s", severity_str, description);
191
192 if (severity == LLVMDSError) {
193 diag->retval = 1;
194 fprintf(stderr,"LLVM triggered Diagnostic Handler: %s\n", description);
195 }
196
197 LLVMDisposeMessage(description);
198 }
199
200 /**
201 * Compile an LLVM module to machine code.
202 *
203 * @returns 0 for success, 1 for failure
204 */
205 unsigned si_llvm_compile(LLVMModuleRef M, struct ac_shader_binary *binary,
206 LLVMTargetMachineRef tm,
207 struct pipe_debug_callback *debug)
208 {
209 struct si_llvm_diagnostics diag;
210 char *err;
211 LLVMContextRef llvm_ctx;
212 LLVMMemoryBufferRef out_buffer;
213 unsigned buffer_size;
214 const char *buffer_data;
215 LLVMBool mem_err;
216
217 diag.debug = debug;
218 diag.retval = 0;
219
220 /* Setup Diagnostic Handler*/
221 llvm_ctx = LLVMGetModuleContext(M);
222
223 LLVMContextSetDiagnosticHandler(llvm_ctx, si_diagnostic_handler, &diag);
224
225 /* Compile IR*/
226 mem_err = LLVMTargetMachineEmitToMemoryBuffer(tm, M, LLVMObjectFile, &err,
227 &out_buffer);
228
229 /* Process Errors/Warnings */
230 if (mem_err) {
231 fprintf(stderr, "%s: %s", __FUNCTION__, err);
232 pipe_debug_message(debug, SHADER_INFO,
233 "LLVM emit error: %s", err);
234 FREE(err);
235 diag.retval = 1;
236 goto out;
237 }
238
239 /* Extract Shader Code*/
240 buffer_size = LLVMGetBufferSize(out_buffer);
241 buffer_data = LLVMGetBufferStart(out_buffer);
242
243 ac_elf_read(buffer_data, buffer_size, binary);
244
245 /* Clean up */
246 LLVMDisposeMemoryBuffer(out_buffer);
247
248 out:
249 if (diag.retval != 0)
250 pipe_debug_message(debug, SHADER_INFO, "LLVM compile failed");
251 return diag.retval;
252 }
253
254 LLVMTypeRef tgsi2llvmtype(struct lp_build_tgsi_context *bld_base,
255 enum tgsi_opcode_type type)
256 {
257 LLVMContextRef ctx = bld_base->base.gallivm->context;
258
259 switch (type) {
260 case TGSI_TYPE_UNSIGNED:
261 case TGSI_TYPE_SIGNED:
262 return LLVMInt32TypeInContext(ctx);
263 case TGSI_TYPE_UNSIGNED64:
264 case TGSI_TYPE_SIGNED64:
265 return LLVMInt64TypeInContext(ctx);
266 case TGSI_TYPE_DOUBLE:
267 return LLVMDoubleTypeInContext(ctx);
268 case TGSI_TYPE_UNTYPED:
269 case TGSI_TYPE_FLOAT:
270 return LLVMFloatTypeInContext(ctx);
271 default: break;
272 }
273 return 0;
274 }
275
276 LLVMValueRef bitcast(struct lp_build_tgsi_context *bld_base,
277 enum tgsi_opcode_type type, LLVMValueRef value)
278 {
279 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
280 LLVMTypeRef dst_type = tgsi2llvmtype(bld_base, type);
281
282 if (dst_type)
283 return LLVMBuildBitCast(builder, value, dst_type, "");
284 else
285 return value;
286 }
287
288 /**
289 * Return a value that is equal to the given i32 \p index if it lies in [0,num)
290 * or an undefined value in the same interval otherwise.
291 */
292 LLVMValueRef si_llvm_bound_index(struct si_shader_context *ctx,
293 LLVMValueRef index,
294 unsigned num)
295 {
296 struct gallivm_state *gallivm = &ctx->gallivm;
297 LLVMBuilderRef builder = gallivm->builder;
298 LLVMValueRef c_max = lp_build_const_int32(gallivm, num - 1);
299 LLVMValueRef cc;
300
301 if (util_is_power_of_two(num)) {
302 index = LLVMBuildAnd(builder, index, c_max, "");
303 } else {
304 /* In theory, this MAX pattern should result in code that is
305 * as good as the bit-wise AND above.
306 *
307 * In practice, LLVM generates worse code (at the time of
308 * writing), because its value tracking is not strong enough.
309 */
310 cc = LLVMBuildICmp(builder, LLVMIntULE, index, c_max, "");
311 index = LLVMBuildSelect(builder, cc, index, c_max, "");
312 }
313
314 return index;
315 }
316
317 static struct si_llvm_flow *
318 get_current_flow(struct si_shader_context *ctx)
319 {
320 if (ctx->flow_depth > 0)
321 return &ctx->flow[ctx->flow_depth - 1];
322 return NULL;
323 }
324
325 static struct si_llvm_flow *
326 get_innermost_loop(struct si_shader_context *ctx)
327 {
328 for (unsigned i = ctx->flow_depth; i > 0; --i) {
329 if (ctx->flow[i - 1].loop_entry_block)
330 return &ctx->flow[i - 1];
331 }
332 return NULL;
333 }
334
335 static struct si_llvm_flow *
336 push_flow(struct si_shader_context *ctx)
337 {
338 struct si_llvm_flow *flow;
339
340 if (ctx->flow_depth >= ctx->flow_depth_max) {
341 unsigned new_max = MAX2(ctx->flow_depth << 1, RADEON_LLVM_INITIAL_CF_DEPTH);
342 ctx->flow = REALLOC(ctx->flow,
343 ctx->flow_depth_max * sizeof(*ctx->flow),
344 new_max * sizeof(*ctx->flow));
345 ctx->flow_depth_max = new_max;
346 }
347
348 flow = &ctx->flow[ctx->flow_depth];
349 ctx->flow_depth++;
350
351 flow->next_block = NULL;
352 flow->loop_entry_block = NULL;
353 return flow;
354 }
355
356 static LLVMValueRef emit_swizzle(struct lp_build_tgsi_context *bld_base,
357 LLVMValueRef value,
358 unsigned swizzle_x,
359 unsigned swizzle_y,
360 unsigned swizzle_z,
361 unsigned swizzle_w)
362 {
363 LLVMValueRef swizzles[4];
364 LLVMTypeRef i32t =
365 LLVMInt32TypeInContext(bld_base->base.gallivm->context);
366
367 swizzles[0] = LLVMConstInt(i32t, swizzle_x, 0);
368 swizzles[1] = LLVMConstInt(i32t, swizzle_y, 0);
369 swizzles[2] = LLVMConstInt(i32t, swizzle_z, 0);
370 swizzles[3] = LLVMConstInt(i32t, swizzle_w, 0);
371
372 return LLVMBuildShuffleVector(bld_base->base.gallivm->builder,
373 value,
374 LLVMGetUndef(LLVMTypeOf(value)),
375 LLVMConstVector(swizzles, 4), "");
376 }
377
378 /**
379 * Return the description of the array covering the given temporary register
380 * index.
381 */
382 static unsigned
383 get_temp_array_id(struct lp_build_tgsi_context *bld_base,
384 unsigned reg_index,
385 const struct tgsi_ind_register *reg)
386 {
387 struct si_shader_context *ctx = si_shader_context(bld_base);
388 unsigned num_arrays = ctx->bld_base.info->array_max[TGSI_FILE_TEMPORARY];
389 unsigned i;
390
391 if (reg && reg->ArrayID > 0 && reg->ArrayID <= num_arrays)
392 return reg->ArrayID;
393
394 for (i = 0; i < num_arrays; i++) {
395 const struct tgsi_array_info *array = &ctx->temp_arrays[i];
396
397 if (reg_index >= array->range.First && reg_index <= array->range.Last)
398 return i + 1;
399 }
400
401 return 0;
402 }
403
404 static struct tgsi_declaration_range
405 get_array_range(struct lp_build_tgsi_context *bld_base,
406 unsigned File, unsigned reg_index,
407 const struct tgsi_ind_register *reg)
408 {
409 struct si_shader_context *ctx = si_shader_context(bld_base);
410 struct tgsi_declaration_range range;
411
412 if (File == TGSI_FILE_TEMPORARY) {
413 unsigned array_id = get_temp_array_id(bld_base, reg_index, reg);
414 if (array_id)
415 return ctx->temp_arrays[array_id - 1].range;
416 }
417
418 range.First = 0;
419 range.Last = bld_base->info->file_max[File];
420 return range;
421 }
422
423 static LLVMValueRef
424 emit_array_index(struct si_shader_context *ctx,
425 const struct tgsi_ind_register *reg,
426 unsigned offset)
427 {
428 struct gallivm_state *gallivm = ctx->bld_base.base.gallivm;
429
430 if (!reg) {
431 return lp_build_const_int32(gallivm, offset);
432 }
433 LLVMValueRef addr = LLVMBuildLoad(gallivm->builder, ctx->addrs[reg->Index][reg->Swizzle], "");
434 return LLVMBuildAdd(gallivm->builder, addr, lp_build_const_int32(gallivm, offset), "");
435 }
436
437 /**
438 * For indirect registers, construct a pointer directly to the requested
439 * element using getelementptr if possible.
440 *
441 * Returns NULL if the insertelement/extractelement fallback for array access
442 * must be used.
443 */
444 static LLVMValueRef
445 get_pointer_into_array(struct si_shader_context *ctx,
446 unsigned file,
447 unsigned swizzle,
448 unsigned reg_index,
449 const struct tgsi_ind_register *reg_indirect)
450 {
451 unsigned array_id;
452 struct tgsi_array_info *array;
453 struct gallivm_state *gallivm = ctx->bld_base.base.gallivm;
454 LLVMBuilderRef builder = gallivm->builder;
455 LLVMValueRef idxs[2];
456 LLVMValueRef index;
457 LLVMValueRef alloca;
458
459 if (file != TGSI_FILE_TEMPORARY)
460 return NULL;
461
462 array_id = get_temp_array_id(&ctx->bld_base, reg_index, reg_indirect);
463 if (!array_id)
464 return NULL;
465
466 alloca = ctx->temp_array_allocas[array_id - 1];
467 if (!alloca)
468 return NULL;
469
470 array = &ctx->temp_arrays[array_id - 1];
471
472 if (!(array->writemask & (1 << swizzle)))
473 return ctx->undef_alloca;
474
475 index = emit_array_index(ctx, reg_indirect,
476 reg_index - ctx->temp_arrays[array_id - 1].range.First);
477
478 /* Ensure that the index is within a valid range, to guard against
479 * VM faults and overwriting critical data (e.g. spilled resource
480 * descriptors).
481 *
482 * TODO It should be possible to avoid the additional instructions
483 * if LLVM is changed so that it guarantuees:
484 * 1. the scratch space descriptor isolates the current wave (this
485 * could even save the scratch offset SGPR at the cost of an
486 * additional SALU instruction)
487 * 2. the memory for allocas must be allocated at the _end_ of the
488 * scratch space (after spilled registers)
489 */
490 index = si_llvm_bound_index(ctx, index, array->range.Last - array->range.First + 1);
491
492 index = LLVMBuildMul(
493 builder, index,
494 lp_build_const_int32(gallivm, util_bitcount(array->writemask)),
495 "");
496 index = LLVMBuildAdd(
497 builder, index,
498 lp_build_const_int32(
499 gallivm,
500 util_bitcount(array->writemask & ((1 << swizzle) - 1))),
501 "");
502 idxs[0] = ctx->bld_base.uint_bld.zero;
503 idxs[1] = index;
504 return LLVMBuildGEP(builder, alloca, idxs, 2, "");
505 }
506
507 LLVMValueRef
508 si_llvm_emit_fetch_64bit(struct lp_build_tgsi_context *bld_base,
509 enum tgsi_opcode_type type,
510 LLVMValueRef ptr,
511 LLVMValueRef ptr2)
512 {
513 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
514 LLVMValueRef result;
515
516 result = LLVMGetUndef(LLVMVectorType(LLVMIntTypeInContext(bld_base->base.gallivm->context, 32), bld_base->base.type.length * 2));
517
518 result = LLVMBuildInsertElement(builder,
519 result,
520 bitcast(bld_base, TGSI_TYPE_UNSIGNED, ptr),
521 bld_base->int_bld.zero, "");
522 result = LLVMBuildInsertElement(builder,
523 result,
524 bitcast(bld_base, TGSI_TYPE_UNSIGNED, ptr2),
525 bld_base->int_bld.one, "");
526 return bitcast(bld_base, type, result);
527 }
528
529 static LLVMValueRef
530 emit_array_fetch(struct lp_build_tgsi_context *bld_base,
531 unsigned File, enum tgsi_opcode_type type,
532 struct tgsi_declaration_range range,
533 unsigned swizzle)
534 {
535 struct si_shader_context *ctx = si_shader_context(bld_base);
536 struct gallivm_state *gallivm = ctx->bld_base.base.gallivm;
537
538 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
539
540 unsigned i, size = range.Last - range.First + 1;
541 LLVMTypeRef vec = LLVMVectorType(tgsi2llvmtype(bld_base, type), size);
542 LLVMValueRef result = LLVMGetUndef(vec);
543
544 struct tgsi_full_src_register tmp_reg = {};
545 tmp_reg.Register.File = File;
546
547 for (i = 0; i < size; ++i) {
548 tmp_reg.Register.Index = i + range.First;
549 LLVMValueRef temp = si_llvm_emit_fetch(bld_base, &tmp_reg, type, swizzle);
550 result = LLVMBuildInsertElement(builder, result, temp,
551 lp_build_const_int32(gallivm, i), "array_vector");
552 }
553 return result;
554 }
555
556 static LLVMValueRef
557 load_value_from_array(struct lp_build_tgsi_context *bld_base,
558 unsigned file,
559 enum tgsi_opcode_type type,
560 unsigned swizzle,
561 unsigned reg_index,
562 const struct tgsi_ind_register *reg_indirect)
563 {
564 struct si_shader_context *ctx = si_shader_context(bld_base);
565 struct gallivm_state *gallivm = bld_base->base.gallivm;
566 LLVMBuilderRef builder = gallivm->builder;
567 LLVMValueRef ptr;
568
569 ptr = get_pointer_into_array(ctx, file, swizzle, reg_index, reg_indirect);
570 if (ptr) {
571 LLVMValueRef val = LLVMBuildLoad(builder, ptr, "");
572 if (tgsi_type_is_64bit(type)) {
573 LLVMValueRef ptr_hi, val_hi;
574 ptr_hi = LLVMBuildGEP(builder, ptr, &bld_base->uint_bld.one, 1, "");
575 val_hi = LLVMBuildLoad(builder, ptr_hi, "");
576 val = si_llvm_emit_fetch_64bit(bld_base, type, val, val_hi);
577 }
578
579 return val;
580 } else {
581 struct tgsi_declaration_range range =
582 get_array_range(bld_base, file, reg_index, reg_indirect);
583 LLVMValueRef index =
584 emit_array_index(ctx, reg_indirect, reg_index - range.First);
585 LLVMValueRef array =
586 emit_array_fetch(bld_base, file, type, range, swizzle);
587 return LLVMBuildExtractElement(builder, array, index, "");
588 }
589 }
590
591 static void
592 store_value_to_array(struct lp_build_tgsi_context *bld_base,
593 LLVMValueRef value,
594 unsigned file,
595 unsigned chan_index,
596 unsigned reg_index,
597 const struct tgsi_ind_register *reg_indirect)
598 {
599 struct si_shader_context *ctx = si_shader_context(bld_base);
600 struct gallivm_state *gallivm = bld_base->base.gallivm;
601 LLVMBuilderRef builder = gallivm->builder;
602 LLVMValueRef ptr;
603
604 ptr = get_pointer_into_array(ctx, file, chan_index, reg_index, reg_indirect);
605 if (ptr) {
606 LLVMBuildStore(builder, value, ptr);
607 } else {
608 unsigned i, size;
609 struct tgsi_declaration_range range = get_array_range(bld_base, file, reg_index, reg_indirect);
610 LLVMValueRef index = emit_array_index(ctx, reg_indirect, reg_index - range.First);
611 LLVMValueRef array =
612 emit_array_fetch(bld_base, file, TGSI_TYPE_FLOAT, range, chan_index);
613 LLVMValueRef temp_ptr;
614
615 array = LLVMBuildInsertElement(builder, array, value, index, "");
616
617 size = range.Last - range.First + 1;
618 for (i = 0; i < size; ++i) {
619 switch(file) {
620 case TGSI_FILE_OUTPUT:
621 temp_ptr = ctx->outputs[i + range.First][chan_index];
622 break;
623
624 case TGSI_FILE_TEMPORARY:
625 if (range.First + i >= ctx->temps_count)
626 continue;
627 temp_ptr = ctx->temps[(i + range.First) * TGSI_NUM_CHANNELS + chan_index];
628 break;
629
630 default:
631 continue;
632 }
633 value = LLVMBuildExtractElement(builder, array,
634 lp_build_const_int32(gallivm, i), "");
635 LLVMBuildStore(builder, value, temp_ptr);
636 }
637 }
638 }
639
640 /* If this is true, preload FS inputs at the beginning of shaders. Otherwise,
641 * reload them at each use. This must be true if the shader is using
642 * derivatives and KILL, because KILL can leave the WQM and then a lazy
643 * input load isn't in the WQM anymore.
644 */
645 static bool si_preload_fs_inputs(struct si_shader_context *ctx)
646 {
647 struct si_shader_selector *sel = ctx->shader->selector;
648
649 return sel->info.uses_derivatives &&
650 sel->info.uses_kill;
651 }
652
653 static LLVMValueRef
654 get_output_ptr(struct lp_build_tgsi_context *bld_base, unsigned index,
655 unsigned chan)
656 {
657 struct si_shader_context *ctx = si_shader_context(bld_base);
658
659 assert(index <= ctx->bld_base.info->file_max[TGSI_FILE_OUTPUT]);
660 return ctx->outputs[index][chan];
661 }
662
663 LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
664 const struct tgsi_full_src_register *reg,
665 enum tgsi_opcode_type type,
666 unsigned swizzle)
667 {
668 struct si_shader_context *ctx = si_shader_context(bld_base);
669 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
670 LLVMValueRef result = NULL, ptr, ptr2;
671
672 if (swizzle == ~0) {
673 LLVMValueRef values[TGSI_NUM_CHANNELS];
674 unsigned chan;
675 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
676 values[chan] = si_llvm_emit_fetch(bld_base, reg, type, chan);
677 }
678 return lp_build_gather_values(bld_base->base.gallivm, values,
679 TGSI_NUM_CHANNELS);
680 }
681
682 if (reg->Register.Indirect) {
683 LLVMValueRef load = load_value_from_array(bld_base, reg->Register.File, type,
684 swizzle, reg->Register.Index, &reg->Indirect);
685 return bitcast(bld_base, type, load);
686 }
687
688 switch(reg->Register.File) {
689 case TGSI_FILE_IMMEDIATE: {
690 LLVMTypeRef ctype = tgsi2llvmtype(bld_base, type);
691 if (tgsi_type_is_64bit(type)) {
692 result = LLVMGetUndef(LLVMVectorType(LLVMIntTypeInContext(bld_base->base.gallivm->context, 32), bld_base->base.type.length * 2));
693 result = LLVMConstInsertElement(result,
694 ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle],
695 bld_base->int_bld.zero);
696 result = LLVMConstInsertElement(result,
697 ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle + 1],
698 bld_base->int_bld.one);
699 return LLVMConstBitCast(result, ctype);
700 } else {
701 return LLVMConstBitCast(ctx->imms[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle], ctype);
702 }
703 }
704
705 case TGSI_FILE_INPUT: {
706 unsigned index = reg->Register.Index;
707 LLVMValueRef input[4];
708
709 /* I don't think doing this for vertex shaders is beneficial.
710 * For those, we want to make sure the VMEM loads are executed
711 * only once. Fragment shaders don't care much, because
712 * v_interp instructions are much cheaper than VMEM loads.
713 */
714 if (!si_preload_fs_inputs(ctx) &&
715 ctx->bld_base.info->processor == PIPE_SHADER_FRAGMENT)
716 ctx->load_input(ctx, index, &ctx->input_decls[index], input);
717 else
718 memcpy(input, &ctx->inputs[index * 4], sizeof(input));
719
720 result = input[swizzle];
721
722 if (tgsi_type_is_64bit(type)) {
723 ptr = result;
724 ptr2 = input[swizzle + 1];
725 return si_llvm_emit_fetch_64bit(bld_base, type, ptr, ptr2);
726 }
727 break;
728 }
729
730 case TGSI_FILE_TEMPORARY:
731 if (reg->Register.Index >= ctx->temps_count)
732 return LLVMGetUndef(tgsi2llvmtype(bld_base, type));
733 ptr = ctx->temps[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle];
734 if (tgsi_type_is_64bit(type)) {
735 ptr2 = ctx->temps[reg->Register.Index * TGSI_NUM_CHANNELS + swizzle + 1];
736 return si_llvm_emit_fetch_64bit(bld_base, type,
737 LLVMBuildLoad(builder, ptr, ""),
738 LLVMBuildLoad(builder, ptr2, ""));
739 }
740 result = LLVMBuildLoad(builder, ptr, "");
741 break;
742
743 case TGSI_FILE_OUTPUT:
744 ptr = get_output_ptr(bld_base, reg->Register.Index, swizzle);
745 if (tgsi_type_is_64bit(type)) {
746 ptr2 = get_output_ptr(bld_base, reg->Register.Index, swizzle + 1);
747 return si_llvm_emit_fetch_64bit(bld_base, type,
748 LLVMBuildLoad(builder, ptr, ""),
749 LLVMBuildLoad(builder, ptr2, ""));
750 }
751 result = LLVMBuildLoad(builder, ptr, "");
752 break;
753
754 default:
755 return LLVMGetUndef(tgsi2llvmtype(bld_base, type));
756 }
757
758 return bitcast(bld_base, type, result);
759 }
760
761 static LLVMValueRef fetch_system_value(struct lp_build_tgsi_context *bld_base,
762 const struct tgsi_full_src_register *reg,
763 enum tgsi_opcode_type type,
764 unsigned swizzle)
765 {
766 struct si_shader_context *ctx = si_shader_context(bld_base);
767 struct gallivm_state *gallivm = bld_base->base.gallivm;
768
769 LLVMValueRef cval = ctx->system_values[reg->Register.Index];
770 if (LLVMGetTypeKind(LLVMTypeOf(cval)) == LLVMVectorTypeKind) {
771 cval = LLVMBuildExtractElement(gallivm->builder, cval,
772 lp_build_const_int32(gallivm, swizzle), "");
773 }
774 return bitcast(bld_base, type, cval);
775 }
776
777 static void emit_declaration(struct lp_build_tgsi_context *bld_base,
778 const struct tgsi_full_declaration *decl)
779 {
780 struct si_shader_context *ctx = si_shader_context(bld_base);
781 LLVMBuilderRef builder = bld_base->base.gallivm->builder;
782 unsigned first, last, i;
783 switch(decl->Declaration.File) {
784 case TGSI_FILE_ADDRESS:
785 {
786 unsigned idx;
787 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
788 unsigned chan;
789 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
790 ctx->addrs[idx][chan] = lp_build_alloca_undef(
791 &ctx->gallivm,
792 ctx->bld_base.uint_bld.elem_type, "");
793 }
794 }
795 break;
796 }
797
798 case TGSI_FILE_TEMPORARY:
799 {
800 char name[16] = "";
801 LLVMValueRef array_alloca = NULL;
802 unsigned decl_size;
803 unsigned writemask = decl->Declaration.UsageMask;
804 first = decl->Range.First;
805 last = decl->Range.Last;
806 decl_size = 4 * ((last - first) + 1);
807
808 if (decl->Declaration.Array) {
809 unsigned id = decl->Array.ArrayID - 1;
810 unsigned array_size;
811
812 writemask &= ctx->temp_arrays[id].writemask;
813 ctx->temp_arrays[id].writemask = writemask;
814 array_size = ((last - first) + 1) * util_bitcount(writemask);
815
816 /* If the array has more than 16 elements, store it
817 * in memory using an alloca that spans the entire
818 * array.
819 *
820 * Otherwise, store each array element individually.
821 * We will then generate vectors (per-channel, up to
822 * <16 x float> if the usagemask is a single bit) for
823 * indirect addressing.
824 *
825 * Note that 16 is the number of vector elements that
826 * LLVM will store in a register, so theoretically an
827 * array with up to 4 * 16 = 64 elements could be
828 * handled this way, but whether that's a good idea
829 * depends on VGPR register pressure elsewhere.
830 *
831 * FIXME: We shouldn't need to have the non-alloca
832 * code path for arrays. LLVM should be smart enough to
833 * promote allocas into registers when profitable.
834 *
835 * LLVM 3.8 crashes with this.
836 */
837 if ((HAVE_LLVM >= 0x0309 && array_size > 16) ||
838 /* TODO: VGPR indexing is buggy on GFX9. */
839 ctx->screen->b.chip_class == GFX9) {
840 array_alloca = LLVMBuildAlloca(builder,
841 LLVMArrayType(bld_base->base.vec_type,
842 array_size), "array");
843 ctx->temp_array_allocas[id] = array_alloca;
844 }
845 }
846
847 if (!ctx->temps_count) {
848 ctx->temps_count = bld_base->info->file_max[TGSI_FILE_TEMPORARY] + 1;
849 ctx->temps = MALLOC(TGSI_NUM_CHANNELS * ctx->temps_count * sizeof(LLVMValueRef));
850 }
851 if (!array_alloca) {
852 for (i = 0; i < decl_size; ++i) {
853 #ifdef DEBUG
854 snprintf(name, sizeof(name), "TEMP%d.%c",
855 first + i / 4, "xyzw"[i % 4]);
856 #endif
857 ctx->temps[first * TGSI_NUM_CHANNELS + i] =
858 lp_build_alloca_undef(bld_base->base.gallivm,
859 bld_base->base.vec_type,
860 name);
861 }
862 } else {
863 LLVMValueRef idxs[2] = {
864 bld_base->uint_bld.zero,
865 NULL
866 };
867 unsigned j = 0;
868
869 if (writemask != TGSI_WRITEMASK_XYZW &&
870 !ctx->undef_alloca) {
871 /* Create a dummy alloca. We use it so that we
872 * have a pointer that is safe to load from if
873 * a shader ever reads from a channel that
874 * it never writes to.
875 */
876 ctx->undef_alloca = lp_build_alloca_undef(
877 bld_base->base.gallivm,
878 bld_base->base.vec_type, "undef");
879 }
880
881 for (i = 0; i < decl_size; ++i) {
882 LLVMValueRef ptr;
883 if (writemask & (1 << (i % 4))) {
884 #ifdef DEBUG
885 snprintf(name, sizeof(name), "TEMP%d.%c",
886 first + i / 4, "xyzw"[i % 4]);
887 #endif
888 idxs[1] = lp_build_const_int32(bld_base->base.gallivm, j);
889 ptr = LLVMBuildGEP(builder, array_alloca, idxs, 2, name);
890 j++;
891 } else {
892 ptr = ctx->undef_alloca;
893 }
894 ctx->temps[first * TGSI_NUM_CHANNELS + i] = ptr;
895 }
896 }
897 break;
898 }
899 case TGSI_FILE_INPUT:
900 {
901 unsigned idx;
902 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
903 if (ctx->load_input &&
904 ctx->input_decls[idx].Declaration.File != TGSI_FILE_INPUT) {
905 ctx->input_decls[idx] = *decl;
906 ctx->input_decls[idx].Range.First = idx;
907 ctx->input_decls[idx].Range.Last = idx;
908 ctx->input_decls[idx].Semantic.Index += idx - decl->Range.First;
909
910 if (si_preload_fs_inputs(ctx) ||
911 bld_base->info->processor != PIPE_SHADER_FRAGMENT)
912 ctx->load_input(ctx, idx, &ctx->input_decls[idx],
913 &ctx->inputs[idx * 4]);
914 }
915 }
916 }
917 break;
918
919 case TGSI_FILE_SYSTEM_VALUE:
920 {
921 unsigned idx;
922 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
923 ctx->load_system_value(ctx, idx, decl);
924 }
925 }
926 break;
927
928 case TGSI_FILE_OUTPUT:
929 {
930 char name[16] = "";
931 unsigned idx;
932 for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) {
933 unsigned chan;
934 assert(idx < RADEON_LLVM_MAX_OUTPUTS);
935 if (ctx->outputs[idx][0])
936 continue;
937 for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
938 #ifdef DEBUG
939 snprintf(name, sizeof(name), "OUT%d.%c",
940 idx, "xyzw"[chan % 4]);
941 #endif
942 ctx->outputs[idx][chan] = lp_build_alloca_undef(
943 &ctx->gallivm,
944 ctx->bld_base.base.elem_type, name);
945 }
946 }
947 break;
948 }
949
950 case TGSI_FILE_MEMORY:
951 ctx->declare_memory_region(ctx, decl);
952 break;
953
954 default:
955 break;
956 }
957 }
958
959 void si_llvm_emit_store(struct lp_build_tgsi_context *bld_base,
960 const struct tgsi_full_instruction *inst,
961 const struct tgsi_opcode_info *info,
962 LLVMValueRef dst[4])
963 {
964 struct si_shader_context *ctx = si_shader_context(bld_base);
965 struct gallivm_state *gallivm = ctx->bld_base.base.gallivm;
966 const struct tgsi_full_dst_register *reg = &inst->Dst[0];
967 LLVMBuilderRef builder = ctx->bld_base.base.gallivm->builder;
968 LLVMValueRef temp_ptr, temp_ptr2 = NULL;
969 unsigned chan, chan_index;
970 bool is_vec_store = false;
971 enum tgsi_opcode_type dtype = tgsi_opcode_infer_dst_type(inst->Instruction.Opcode);
972
973 if (dst[0]) {
974 LLVMTypeKind k = LLVMGetTypeKind(LLVMTypeOf(dst[0]));
975 is_vec_store = (k == LLVMVectorTypeKind);
976 }
977
978 if (is_vec_store) {
979 LLVMValueRef values[4] = {};
980 TGSI_FOR_EACH_DST0_ENABLED_CHANNEL(inst, chan) {
981 LLVMValueRef index = lp_build_const_int32(gallivm, chan);
982 values[chan] = LLVMBuildExtractElement(gallivm->builder,
983 dst[0], index, "");
984 }
985 bld_base->emit_store(bld_base, inst, info, values);
986 return;
987 }
988
989 TGSI_FOR_EACH_DST0_ENABLED_CHANNEL( inst, chan_index ) {
990 LLVMValueRef value = dst[chan_index];
991
992 if (tgsi_type_is_64bit(dtype) && (chan_index == 1 || chan_index == 3))
993 continue;
994 if (inst->Instruction.Saturate)
995 value = ac_build_clamp(&ctx->ac, value);
996
997 if (reg->Register.File == TGSI_FILE_ADDRESS) {
998 temp_ptr = ctx->addrs[reg->Register.Index][chan_index];
999 LLVMBuildStore(builder, value, temp_ptr);
1000 continue;
1001 }
1002
1003 if (!tgsi_type_is_64bit(dtype))
1004 value = bitcast(bld_base, TGSI_TYPE_FLOAT, value);
1005
1006 if (reg->Register.Indirect) {
1007 unsigned file = reg->Register.File;
1008 unsigned reg_index = reg->Register.Index;
1009 store_value_to_array(bld_base, value, file, chan_index,
1010 reg_index, &reg->Indirect);
1011 } else {
1012 switch(reg->Register.File) {
1013 case TGSI_FILE_OUTPUT:
1014 temp_ptr = ctx->outputs[reg->Register.Index][chan_index];
1015 if (tgsi_type_is_64bit(dtype))
1016 temp_ptr2 = ctx->outputs[reg->Register.Index][chan_index + 1];
1017 break;
1018
1019 case TGSI_FILE_TEMPORARY:
1020 {
1021 if (reg->Register.Index >= ctx->temps_count)
1022 continue;
1023
1024 temp_ptr = ctx->temps[ TGSI_NUM_CHANNELS * reg->Register.Index + chan_index];
1025 if (tgsi_type_is_64bit(dtype))
1026 temp_ptr2 = ctx->temps[ TGSI_NUM_CHANNELS * reg->Register.Index + chan_index + 1];
1027
1028 break;
1029 }
1030 default:
1031 return;
1032 }
1033 if (!tgsi_type_is_64bit(dtype))
1034 LLVMBuildStore(builder, value, temp_ptr);
1035 else {
1036 LLVMValueRef ptr = LLVMBuildBitCast(builder, value,
1037 LLVMVectorType(LLVMIntTypeInContext(bld_base->base.gallivm->context, 32), 2), "");
1038 LLVMValueRef val2;
1039 value = LLVMBuildExtractElement(builder, ptr,
1040 bld_base->uint_bld.zero, "");
1041 val2 = LLVMBuildExtractElement(builder, ptr,
1042 bld_base->uint_bld.one, "");
1043
1044 LLVMBuildStore(builder, bitcast(bld_base, TGSI_TYPE_FLOAT, value), temp_ptr);
1045 LLVMBuildStore(builder, bitcast(bld_base, TGSI_TYPE_FLOAT, val2), temp_ptr2);
1046 }
1047 }
1048 }
1049 }
1050
1051 static void set_basicblock_name(LLVMBasicBlockRef bb, const char *base, int pc)
1052 {
1053 char buf[32];
1054 /* Subtract 1 so that the number shown is that of the corresponding
1055 * opcode in the TGSI dump, e.g. an if block has the same suffix as
1056 * the instruction number of the corresponding TGSI IF.
1057 */
1058 snprintf(buf, sizeof(buf), "%s%d", base, pc - 1);
1059 LLVMSetValueName(LLVMBasicBlockAsValue(bb), buf);
1060 }
1061
1062 /* Append a basic block at the level of the parent flow.
1063 */
1064 static LLVMBasicBlockRef append_basic_block(struct si_shader_context *ctx,
1065 const char *name)
1066 {
1067 struct gallivm_state *gallivm = &ctx->gallivm;
1068
1069 assert(ctx->flow_depth >= 1);
1070
1071 if (ctx->flow_depth >= 2) {
1072 struct si_llvm_flow *flow = &ctx->flow[ctx->flow_depth - 2];
1073
1074 return LLVMInsertBasicBlockInContext(gallivm->context,
1075 flow->next_block, name);
1076 }
1077
1078 return LLVMAppendBasicBlockInContext(gallivm->context, ctx->main_fn, name);
1079 }
1080
1081 /* Emit a branch to the given default target for the current block if
1082 * applicable -- that is, if the current block does not already contain a
1083 * branch from a break or continue.
1084 */
1085 static void emit_default_branch(LLVMBuilderRef builder, LLVMBasicBlockRef target)
1086 {
1087 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder)))
1088 LLVMBuildBr(builder, target);
1089 }
1090
1091 static void bgnloop_emit(const struct lp_build_tgsi_action *action,
1092 struct lp_build_tgsi_context *bld_base,
1093 struct lp_build_emit_data *emit_data)
1094 {
1095 struct si_shader_context *ctx = si_shader_context(bld_base);
1096 struct gallivm_state *gallivm = bld_base->base.gallivm;
1097 struct si_llvm_flow *flow = push_flow(ctx);
1098 flow->loop_entry_block = append_basic_block(ctx, "LOOP");
1099 flow->next_block = append_basic_block(ctx, "ENDLOOP");
1100 set_basicblock_name(flow->loop_entry_block, "loop", bld_base->pc);
1101 LLVMBuildBr(gallivm->builder, flow->loop_entry_block);
1102 LLVMPositionBuilderAtEnd(gallivm->builder, flow->loop_entry_block);
1103 }
1104
1105 static void brk_emit(const struct lp_build_tgsi_action *action,
1106 struct lp_build_tgsi_context *bld_base,
1107 struct lp_build_emit_data *emit_data)
1108 {
1109 struct si_shader_context *ctx = si_shader_context(bld_base);
1110 struct gallivm_state *gallivm = bld_base->base.gallivm;
1111 struct si_llvm_flow *flow = get_innermost_loop(ctx);
1112
1113 LLVMBuildBr(gallivm->builder, flow->next_block);
1114 }
1115
1116 static void cont_emit(const struct lp_build_tgsi_action *action,
1117 struct lp_build_tgsi_context *bld_base,
1118 struct lp_build_emit_data *emit_data)
1119 {
1120 struct si_shader_context *ctx = si_shader_context(bld_base);
1121 struct gallivm_state *gallivm = bld_base->base.gallivm;
1122 struct si_llvm_flow *flow = get_innermost_loop(ctx);
1123
1124 LLVMBuildBr(gallivm->builder, flow->loop_entry_block);
1125 }
1126
1127 static void else_emit(const struct lp_build_tgsi_action *action,
1128 struct lp_build_tgsi_context *bld_base,
1129 struct lp_build_emit_data *emit_data)
1130 {
1131 struct si_shader_context *ctx = si_shader_context(bld_base);
1132 struct gallivm_state *gallivm = bld_base->base.gallivm;
1133 struct si_llvm_flow *current_branch = get_current_flow(ctx);
1134 LLVMBasicBlockRef endif_block;
1135
1136 assert(!current_branch->loop_entry_block);
1137
1138 endif_block = append_basic_block(ctx, "ENDIF");
1139 emit_default_branch(gallivm->builder, endif_block);
1140
1141 LLVMPositionBuilderAtEnd(gallivm->builder, current_branch->next_block);
1142 set_basicblock_name(current_branch->next_block, "else", bld_base->pc);
1143
1144 current_branch->next_block = endif_block;
1145 }
1146
1147 static void endif_emit(const struct lp_build_tgsi_action *action,
1148 struct lp_build_tgsi_context *bld_base,
1149 struct lp_build_emit_data *emit_data)
1150 {
1151 struct si_shader_context *ctx = si_shader_context(bld_base);
1152 struct gallivm_state *gallivm = bld_base->base.gallivm;
1153 struct si_llvm_flow *current_branch = get_current_flow(ctx);
1154
1155 assert(!current_branch->loop_entry_block);
1156
1157 emit_default_branch(gallivm->builder, current_branch->next_block);
1158 LLVMPositionBuilderAtEnd(gallivm->builder, current_branch->next_block);
1159 set_basicblock_name(current_branch->next_block, "endif", bld_base->pc);
1160
1161 ctx->flow_depth--;
1162 }
1163
1164 static void endloop_emit(const struct lp_build_tgsi_action *action,
1165 struct lp_build_tgsi_context *bld_base,
1166 struct lp_build_emit_data *emit_data)
1167 {
1168 struct si_shader_context *ctx = si_shader_context(bld_base);
1169 struct gallivm_state *gallivm = bld_base->base.gallivm;
1170 struct si_llvm_flow *current_loop = get_current_flow(ctx);
1171
1172 assert(current_loop->loop_entry_block);
1173
1174 emit_default_branch(gallivm->builder, current_loop->loop_entry_block);
1175
1176 LLVMPositionBuilderAtEnd(gallivm->builder, current_loop->next_block);
1177 set_basicblock_name(current_loop->next_block, "endloop", bld_base->pc);
1178 ctx->flow_depth--;
1179 }
1180
1181 static void if_cond_emit(const struct lp_build_tgsi_action *action,
1182 struct lp_build_tgsi_context *bld_base,
1183 struct lp_build_emit_data *emit_data,
1184 LLVMValueRef cond)
1185 {
1186 struct si_shader_context *ctx = si_shader_context(bld_base);
1187 struct gallivm_state *gallivm = bld_base->base.gallivm;
1188 struct si_llvm_flow *flow = push_flow(ctx);
1189 LLVMBasicBlockRef if_block;
1190
1191 if_block = append_basic_block(ctx, "IF");
1192 flow->next_block = append_basic_block(ctx, "ELSE");
1193 set_basicblock_name(if_block, "if", bld_base->pc);
1194 LLVMBuildCondBr(gallivm->builder, cond, if_block, flow->next_block);
1195 LLVMPositionBuilderAtEnd(gallivm->builder, if_block);
1196 }
1197
1198 static void if_emit(const struct lp_build_tgsi_action *action,
1199 struct lp_build_tgsi_context *bld_base,
1200 struct lp_build_emit_data *emit_data)
1201 {
1202 struct gallivm_state *gallivm = bld_base->base.gallivm;
1203 LLVMValueRef cond;
1204
1205 cond = LLVMBuildFCmp(gallivm->builder, LLVMRealUNE,
1206 emit_data->args[0],
1207 bld_base->base.zero, "");
1208
1209 if_cond_emit(action, bld_base, emit_data, cond);
1210 }
1211
1212 static void uif_emit(const struct lp_build_tgsi_action *action,
1213 struct lp_build_tgsi_context *bld_base,
1214 struct lp_build_emit_data *emit_data)
1215 {
1216 struct gallivm_state *gallivm = bld_base->base.gallivm;
1217 LLVMValueRef cond;
1218
1219 cond = LLVMBuildICmp(gallivm->builder, LLVMIntNE,
1220 bitcast(bld_base, TGSI_TYPE_UNSIGNED, emit_data->args[0]),
1221 bld_base->int_bld.zero, "");
1222
1223 if_cond_emit(action, bld_base, emit_data, cond);
1224 }
1225
1226 static void emit_immediate(struct lp_build_tgsi_context *bld_base,
1227 const struct tgsi_full_immediate *imm)
1228 {
1229 unsigned i;
1230 struct si_shader_context *ctx = si_shader_context(bld_base);
1231
1232 for (i = 0; i < 4; ++i) {
1233 ctx->imms[ctx->imms_num * TGSI_NUM_CHANNELS + i] =
1234 LLVMConstInt(bld_base->uint_bld.elem_type, imm->u[i].Uint, false );
1235 }
1236
1237 ctx->imms_num++;
1238 }
1239
1240 void si_llvm_context_init(struct si_shader_context *ctx,
1241 struct si_screen *sscreen,
1242 struct si_shader *shader,
1243 LLVMTargetMachineRef tm,
1244 const struct tgsi_shader_info *info,
1245 const struct tgsi_token *tokens)
1246 {
1247 struct lp_type type;
1248
1249 /* Initialize the gallivm object:
1250 * We are only using the module, context, and builder fields of this struct.
1251 * This should be enough for us to be able to pass our gallivm struct to the
1252 * helper functions in the gallivm module.
1253 */
1254 memset(ctx, 0, sizeof(*ctx));
1255 ctx->shader = shader;
1256 ctx->screen = sscreen;
1257 ctx->tm = tm;
1258 ctx->type = info ? info->processor : -1;
1259
1260 ctx->gallivm.context = LLVMContextCreate();
1261 ctx->gallivm.module = LLVMModuleCreateWithNameInContext("tgsi",
1262 ctx->gallivm.context);
1263 LLVMSetTarget(ctx->gallivm.module, "amdgcn--");
1264
1265 #if HAVE_LLVM >= 0x0309
1266 LLVMTargetDataRef data_layout = LLVMCreateTargetDataLayout(tm);
1267 char *data_layout_str = LLVMCopyStringRepOfTargetData(data_layout);
1268 LLVMSetDataLayout(ctx->gallivm.module, data_layout_str);
1269 LLVMDisposeTargetData(data_layout);
1270 LLVMDisposeMessage(data_layout_str);
1271 #endif
1272
1273 bool unsafe_fpmath = (sscreen->b.debug_flags & DBG_UNSAFE_MATH) != 0;
1274 enum lp_float_mode float_mode =
1275 unsafe_fpmath ? LP_FLOAT_MODE_UNSAFE_FP_MATH :
1276 LP_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH;
1277
1278 ctx->gallivm.builder = lp_create_builder(ctx->gallivm.context,
1279 float_mode);
1280
1281 ac_llvm_context_init(&ctx->ac, ctx->gallivm.context);
1282 ctx->ac.module = ctx->gallivm.module;
1283 ctx->ac.builder = ctx->gallivm.builder;
1284
1285 struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
1286
1287 bld_base->info = info;
1288
1289 if (info && info->array_max[TGSI_FILE_TEMPORARY] > 0) {
1290 int size = info->array_max[TGSI_FILE_TEMPORARY];
1291
1292 ctx->temp_arrays = CALLOC(size, sizeof(ctx->temp_arrays[0]));
1293 ctx->temp_array_allocas = CALLOC(size, sizeof(ctx->temp_array_allocas[0]));
1294
1295 if (tokens)
1296 tgsi_scan_arrays(tokens, TGSI_FILE_TEMPORARY, size,
1297 ctx->temp_arrays);
1298 }
1299
1300 if (info && info->file_max[TGSI_FILE_IMMEDIATE] >= 0) {
1301 int size = info->file_max[TGSI_FILE_IMMEDIATE] + 1;
1302 ctx->imms = MALLOC(size * TGSI_NUM_CHANNELS * sizeof(LLVMValueRef));
1303 }
1304
1305 type.floating = true;
1306 type.fixed = false;
1307 type.sign = true;
1308 type.norm = false;
1309 type.width = 32;
1310 type.length = 1;
1311
1312 lp_build_context_init(&bld_base->base, &ctx->gallivm, type);
1313 lp_build_context_init(&ctx->bld_base.uint_bld, &ctx->gallivm, lp_uint_type(type));
1314 lp_build_context_init(&ctx->bld_base.int_bld, &ctx->gallivm, lp_int_type(type));
1315 type.width *= 2;
1316 lp_build_context_init(&ctx->bld_base.dbl_bld, &ctx->gallivm, type);
1317 lp_build_context_init(&ctx->bld_base.uint64_bld, &ctx->gallivm, lp_uint_type(type));
1318 lp_build_context_init(&ctx->bld_base.int64_bld, &ctx->gallivm, lp_int_type(type));
1319
1320 bld_base->soa = 1;
1321 bld_base->emit_store = si_llvm_emit_store;
1322 bld_base->emit_swizzle = emit_swizzle;
1323 bld_base->emit_declaration = emit_declaration;
1324 bld_base->emit_immediate = emit_immediate;
1325
1326 bld_base->emit_fetch_funcs[TGSI_FILE_IMMEDIATE] = si_llvm_emit_fetch;
1327 bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = si_llvm_emit_fetch;
1328 bld_base->emit_fetch_funcs[TGSI_FILE_TEMPORARY] = si_llvm_emit_fetch;
1329 bld_base->emit_fetch_funcs[TGSI_FILE_OUTPUT] = si_llvm_emit_fetch;
1330 bld_base->emit_fetch_funcs[TGSI_FILE_SYSTEM_VALUE] = fetch_system_value;
1331
1332 /* metadata allowing 2.5 ULP */
1333 ctx->fpmath_md_kind = LLVMGetMDKindIDInContext(ctx->gallivm.context,
1334 "fpmath", 6);
1335 LLVMValueRef arg = lp_build_const_float(&ctx->gallivm, 2.5);
1336 ctx->fpmath_md_2p5_ulp = LLVMMDNodeInContext(ctx->gallivm.context,
1337 &arg, 1);
1338
1339 bld_base->op_actions[TGSI_OPCODE_BGNLOOP].emit = bgnloop_emit;
1340 bld_base->op_actions[TGSI_OPCODE_BRK].emit = brk_emit;
1341 bld_base->op_actions[TGSI_OPCODE_CONT].emit = cont_emit;
1342 bld_base->op_actions[TGSI_OPCODE_IF].emit = if_emit;
1343 bld_base->op_actions[TGSI_OPCODE_UIF].emit = uif_emit;
1344 bld_base->op_actions[TGSI_OPCODE_ELSE].emit = else_emit;
1345 bld_base->op_actions[TGSI_OPCODE_ENDIF].emit = endif_emit;
1346 bld_base->op_actions[TGSI_OPCODE_ENDLOOP].emit = endloop_emit;
1347
1348 si_shader_context_init_alu(&ctx->bld_base);
1349
1350 ctx->voidt = LLVMVoidTypeInContext(ctx->gallivm.context);
1351 ctx->i1 = LLVMInt1TypeInContext(ctx->gallivm.context);
1352 ctx->i8 = LLVMInt8TypeInContext(ctx->gallivm.context);
1353 ctx->i32 = LLVMInt32TypeInContext(ctx->gallivm.context);
1354 ctx->i64 = LLVMInt64TypeInContext(ctx->gallivm.context);
1355 ctx->i128 = LLVMIntTypeInContext(ctx->gallivm.context, 128);
1356 ctx->f32 = LLVMFloatTypeInContext(ctx->gallivm.context);
1357 ctx->v16i8 = LLVMVectorType(ctx->i8, 16);
1358 ctx->v2i32 = LLVMVectorType(ctx->i32, 2);
1359 ctx->v4i32 = LLVMVectorType(ctx->i32, 4);
1360 ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
1361 ctx->v8i32 = LLVMVectorType(ctx->i32, 8);
1362
1363 ctx->i32_0 = LLVMConstInt(ctx->i32, 0, 0);
1364 ctx->i32_1 = LLVMConstInt(ctx->i32, 1, 0);
1365 }
1366
1367 void si_llvm_create_func(struct si_shader_context *ctx,
1368 const char *name,
1369 LLVMTypeRef *return_types, unsigned num_return_elems,
1370 LLVMTypeRef *ParamTypes, unsigned ParamCount)
1371 {
1372 LLVMTypeRef main_fn_type, ret_type;
1373 LLVMBasicBlockRef main_fn_body;
1374
1375 if (num_return_elems)
1376 ret_type = LLVMStructTypeInContext(ctx->gallivm.context,
1377 return_types,
1378 num_return_elems, true);
1379 else
1380 ret_type = LLVMVoidTypeInContext(ctx->gallivm.context);
1381
1382 /* Setup the function */
1383 ctx->return_type = ret_type;
1384 main_fn_type = LLVMFunctionType(ret_type, ParamTypes, ParamCount, 0);
1385 ctx->main_fn = LLVMAddFunction(ctx->gallivm.module, name, main_fn_type);
1386 main_fn_body = LLVMAppendBasicBlockInContext(ctx->gallivm.context,
1387 ctx->main_fn, "main_body");
1388 LLVMPositionBuilderAtEnd(ctx->gallivm.builder, main_fn_body);
1389 }
1390
1391 void si_llvm_finalize_module(struct si_shader_context *ctx,
1392 bool run_verifier)
1393 {
1394 struct gallivm_state *gallivm = ctx->bld_base.base.gallivm;
1395 const char *triple = LLVMGetTarget(gallivm->module);
1396 LLVMTargetLibraryInfoRef target_library_info;
1397
1398 /* Create the pass manager */
1399 gallivm->passmgr = LLVMCreatePassManager();
1400
1401 target_library_info = gallivm_create_target_library_info(triple);
1402 LLVMAddTargetLibraryInfo(target_library_info, gallivm->passmgr);
1403
1404 if (run_verifier)
1405 LLVMAddVerifierPass(gallivm->passmgr);
1406
1407 LLVMAddAlwaysInlinerPass(gallivm->passmgr);
1408
1409 /* This pass should eliminate all the load and store instructions */
1410 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
1411
1412 /* Add some optimization passes */
1413 LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
1414 LLVMAddLICMPass(gallivm->passmgr);
1415 LLVMAddAggressiveDCEPass(gallivm->passmgr);
1416 LLVMAddCFGSimplificationPass(gallivm->passmgr);
1417 LLVMAddInstructionCombiningPass(gallivm->passmgr);
1418
1419 /* Run the pass */
1420 LLVMRunPassManager(gallivm->passmgr, ctx->gallivm.module);
1421
1422 LLVMDisposeBuilder(gallivm->builder);
1423 LLVMDisposePassManager(gallivm->passmgr);
1424 gallivm_dispose_target_library_info(target_library_info);
1425 }
1426
1427 void si_llvm_dispose(struct si_shader_context *ctx)
1428 {
1429 LLVMDisposeModule(ctx->bld_base.base.gallivm->module);
1430 LLVMContextDispose(ctx->bld_base.base.gallivm->context);
1431 FREE(ctx->temp_arrays);
1432 ctx->temp_arrays = NULL;
1433 FREE(ctx->temp_array_allocas);
1434 ctx->temp_array_allocas = NULL;
1435 FREE(ctx->temps);
1436 ctx->temps = NULL;
1437 ctx->temps_count = 0;
1438 FREE(ctx->imms);
1439 ctx->imms = NULL;
1440 ctx->imms_num = 0;
1441 FREE(ctx->flow);
1442 ctx->flow = NULL;
1443 ctx->flow_depth_max = 0;
1444 }