lp_state_fs.c revision 9d48a621d2a0e55a76a2cfd0aea3b773e907ed50
1/************************************************************************** 2 * 3 * Copyright 2009 VMware, Inc. 4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 29/** 30 * @file 31 * Code generate the whole fragment pipeline. 32 * 33 * The fragment pipeline consists of the following stages: 34 * - triangle edge in/out testing 35 * - scissor test 36 * - stipple (TBI) 37 * - early depth test 38 * - fragment shader 39 * - alpha test 40 * - depth/stencil test (stencil TBI) 41 * - blending 42 * 43 * This file has only the glue to assemble the fragment pipeline. The actual 44 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the 45 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we 46 * muster the LLVM JIT execution engine to create a function that follows an 47 * established binary interface and that can be called from C directly. 48 * 49 * A big source of complexity here is that we often want to run different 50 * stages with different precisions and data types and precisions. For example, 51 * the fragment shader needs typically to be done in floats, but the 52 * depth/stencil test and blending is better done in the type that most closely 53 * matches the depth/stencil and color buffer respectively. 54 * 55 * Since the width of a SIMD vector register stays the same regardless of the 56 * element type, different types imply different number of elements, so we must 57 * code generate more instances of the stages with larger types to be able to 58 * feed/consume the stages with smaller types. 59 * 60 * @author Jose Fonseca <jfonseca@vmware.com> 61 */ 62 63#include <limits.h> 64#include "pipe/p_defines.h" 65#include "util/u_inlines.h" 66#include "util/u_memory.h" 67#include "util/u_format.h" 68#include "util/u_dump.h" 69#include "os/os_time.h" 70#include "pipe/p_shader_tokens.h" 71#include "draw/draw_context.h" 72#include "tgsi/tgsi_dump.h" 73#include "tgsi/tgsi_scan.h" 74#include "tgsi/tgsi_parse.h" 75#include "gallivm/lp_bld_type.h" 76#include "gallivm/lp_bld_const.h" 77#include "gallivm/lp_bld_conv.h" 78#include "gallivm/lp_bld_intr.h" 79#include "gallivm/lp_bld_logic.h" 80#include "gallivm/lp_bld_depth.h" 81#include "gallivm/lp_bld_interp.h" 82#include "gallivm/lp_bld_tgsi.h" 83#include "gallivm/lp_bld_alpha.h" 84#include "gallivm/lp_bld_blend.h" 85#include "gallivm/lp_bld_swizzle.h" 86#include "gallivm/lp_bld_flow.h" 87#include "gallivm/lp_bld_debug.h" 88#include "lp_buffer.h" 89#include "lp_context.h" 90#include "lp_debug.h" 91#include "lp_perf.h" 92#include "lp_screen.h" 93#include "lp_setup.h" 94#include "lp_state.h" 95#include "lp_tex_sample.h" 96 97 98#include <llvm-c/Analysis.h> 99 100 101static const unsigned char quad_offset_x[4] = {0, 1, 0, 1}; 102static const unsigned char quad_offset_y[4] = {0, 0, 1, 1}; 103 104 105/* 106 * Derive from the quad's upper left scalar coordinates the coordinates for 107 * all other quad pixels 108 */ 109static void 110generate_pos0(LLVMBuilderRef builder, 111 LLVMValueRef x, 112 LLVMValueRef y, 113 LLVMValueRef *x0, 114 LLVMValueRef *y0) 115{ 116 LLVMTypeRef int_elem_type = LLVMInt32Type(); 117 LLVMTypeRef int_vec_type = LLVMVectorType(int_elem_type, QUAD_SIZE); 118 LLVMTypeRef elem_type = LLVMFloatType(); 119 LLVMTypeRef vec_type = LLVMVectorType(elem_type, QUAD_SIZE); 120 LLVMValueRef x_offsets[QUAD_SIZE]; 121 LLVMValueRef y_offsets[QUAD_SIZE]; 122 unsigned i; 123 124 x = lp_build_broadcast(builder, int_vec_type, x); 125 y = lp_build_broadcast(builder, int_vec_type, y); 126 127 for(i = 0; i < QUAD_SIZE; ++i) { 128 x_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_x[i], 0); 129 y_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_y[i], 0); 130 } 131 132 x = LLVMBuildAdd(builder, x, LLVMConstVector(x_offsets, QUAD_SIZE), ""); 133 y = LLVMBuildAdd(builder, y, LLVMConstVector(y_offsets, QUAD_SIZE), ""); 134 135 *x0 = LLVMBuildSIToFP(builder, x, vec_type, ""); 136 *y0 = LLVMBuildSIToFP(builder, y, vec_type, ""); 137} 138 139 140/** 141 * Generate the depth /stencil test code. 142 */ 143static void 144generate_depth_stencil(LLVMBuilderRef builder, 145 const struct lp_fragment_shader_variant_key *key, 146 struct lp_type src_type, 147 struct lp_build_mask_context *mask, 148 LLVMValueRef stencil_refs, 149 LLVMValueRef src, 150 LLVMValueRef dst_ptr) 151{ 152 const struct util_format_description *format_desc; 153 struct lp_type dst_type; 154 155 if (!key->depth.enabled && !key->stencil[0].enabled && !key->stencil[1].enabled) 156 return; 157 158 format_desc = util_format_description(key->zsbuf_format); 159 assert(format_desc); 160 161 /* 162 * Depths are expected to be between 0 and 1, even if they are stored in 163 * floats. Setting these bits here will ensure that the lp_build_conv() call 164 * below won't try to unnecessarily clamp the incoming values. 165 */ 166 if(src_type.floating) { 167 src_type.sign = FALSE; 168 src_type.norm = TRUE; 169 } 170 else { 171 assert(!src_type.sign); 172 assert(src_type.norm); 173 } 174 175 /* Pick the depth type. */ 176 dst_type = lp_depth_type(format_desc, src_type.width*src_type.length); 177 178 /* FIXME: Cope with a depth test type with a different bit width. */ 179 assert(dst_type.width == src_type.width); 180 assert(dst_type.length == src_type.length); 181 182 /* Convert fragment Z from float to integer */ 183 lp_build_conv(builder, src_type, dst_type, &src, 1, &src, 1); 184 185 dst_ptr = LLVMBuildBitCast(builder, 186 dst_ptr, 187 LLVMPointerType(lp_build_vec_type(dst_type), 0), ""); 188 lp_build_depth_stencil_test(builder, 189 &key->depth, 190 key->stencil, 191 dst_type, 192 format_desc, 193 mask, 194 stencil_refs, 195 src, 196 dst_ptr); 197} 198 199 200/** 201 * Generate the code to do inside/outside triangle testing for the 202 * four pixels in a 2x2 quad. This will set the four elements of the 203 * quad mask vector to 0 or ~0. 204 * \param i which quad of the quad group to test, in [0,3] 205 */ 206static void 207generate_tri_edge_mask(LLVMBuilderRef builder, 208 unsigned i, 209 LLVMValueRef *mask, /* ivec4, out */ 210 LLVMValueRef c0, /* int32 */ 211 LLVMValueRef c1, /* int32 */ 212 LLVMValueRef c2, /* int32 */ 213 LLVMValueRef step0_ptr, /* ivec4 */ 214 LLVMValueRef step1_ptr, /* ivec4 */ 215 LLVMValueRef step2_ptr) /* ivec4 */ 216{ 217#define OPTIMIZE_IN_OUT_TEST 0 218#if OPTIMIZE_IN_OUT_TEST 219 struct lp_build_if_state ifctx; 220 LLVMValueRef not_draw_all; 221#endif 222 struct lp_build_flow_context *flow; 223 struct lp_type i32_type; 224 LLVMTypeRef i32vec4_type, mask_type; 225 LLVMValueRef c0_vec, c1_vec, c2_vec; 226 LLVMValueRef in_out_mask; 227 228 assert(i < 4); 229 230 /* int32 vector type */ 231 memset(&i32_type, 0, sizeof i32_type); 232 i32_type.floating = FALSE; /* values are integers */ 233 i32_type.sign = TRUE; /* values are signed */ 234 i32_type.norm = FALSE; /* values are not normalized */ 235 i32_type.width = 32; /* 32-bit int values */ 236 i32_type.length = 4; /* 4 elements per vector */ 237 238 i32vec4_type = lp_build_int32_vec4_type(); 239 240 mask_type = LLVMIntType(32 * 4); 241 242 /* 243 * Use a conditional here to do detailed pixel in/out testing. 244 * We only have to do this if c0 != INT_MIN. 245 */ 246 flow = lp_build_flow_create(builder); 247 lp_build_flow_scope_begin(flow); 248 249 { 250#if OPTIMIZE_IN_OUT_TEST 251 /* not_draw_all = (c0 != INT_MIN) */ 252 not_draw_all = LLVMBuildICmp(builder, 253 LLVMIntNE, 254 c0, 255 LLVMConstInt(LLVMInt32Type(), INT_MIN, 0), 256 ""); 257 258 in_out_mask = lp_build_const_int_vec(i32_type, ~0); 259 260 261 lp_build_flow_scope_declare(flow, &in_out_mask); 262 263 /* if (not_draw_all) {... */ 264 lp_build_if(&ifctx, flow, builder, not_draw_all); 265#endif 266 { 267 LLVMValueRef step0_vec, step1_vec, step2_vec; 268 LLVMValueRef m0_vec, m1_vec, m2_vec; 269 LLVMValueRef index, m; 270 271 /* c0_vec = {c0, c0, c0, c0} 272 * Note that we emit this code four times but LLVM optimizes away 273 * three instances of it. 274 */ 275 c0_vec = lp_build_broadcast(builder, i32vec4_type, c0); 276 c1_vec = lp_build_broadcast(builder, i32vec4_type, c1); 277 c2_vec = lp_build_broadcast(builder, i32vec4_type, c2); 278 lp_build_name(c0_vec, "edgeconst0vec"); 279 lp_build_name(c1_vec, "edgeconst1vec"); 280 lp_build_name(c2_vec, "edgeconst2vec"); 281 282 /* load step0vec, step1, step2 vec from memory */ 283 index = LLVMConstInt(LLVMInt32Type(), i, 0); 284 step0_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step0_ptr, &index, 1, ""), ""); 285 step1_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step1_ptr, &index, 1, ""), ""); 286 step2_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step2_ptr, &index, 1, ""), ""); 287 lp_build_name(step0_vec, "step0vec"); 288 lp_build_name(step1_vec, "step1vec"); 289 lp_build_name(step2_vec, "step2vec"); 290 291 /* m0_vec = step0_ptr[i] > c0_vec */ 292 m0_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step0_vec, c0_vec); 293 m1_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step1_vec, c1_vec); 294 m2_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step2_vec, c2_vec); 295 296 /* in_out_mask = m0_vec & m1_vec & m2_vec */ 297 m = LLVMBuildAnd(builder, m0_vec, m1_vec, ""); 298 in_out_mask = LLVMBuildAnd(builder, m, m2_vec, ""); 299 lp_build_name(in_out_mask, "inoutmaskvec"); 300 } 301#if OPTIMIZE_IN_OUT_TEST 302 lp_build_endif(&ifctx); 303#endif 304 305 } 306 lp_build_flow_scope_end(flow); 307 lp_build_flow_destroy(flow); 308 309 /* This is the initial alive/dead pixel mask for a quad of four pixels. 310 * It's an int[4] vector with each word set to 0 or ~0. 311 * Words will get cleared when pixels faile the Z test, etc. 312 */ 313 *mask = in_out_mask; 314} 315 316 317static LLVMValueRef 318generate_scissor_test(LLVMBuilderRef builder, 319 LLVMValueRef context_ptr, 320 const struct lp_build_interp_soa_context *interp, 321 struct lp_type type) 322{ 323 LLVMTypeRef vec_type = lp_build_vec_type(type); 324 LLVMValueRef xpos = interp->pos[0], ypos = interp->pos[1]; 325 LLVMValueRef xmin, ymin, xmax, ymax; 326 LLVMValueRef m0, m1, m2, m3, m; 327 328 /* xpos, ypos contain the window coords for the four pixels in the quad */ 329 assert(xpos); 330 assert(ypos); 331 332 /* get the current scissor bounds, convert to vectors */ 333 xmin = lp_jit_context_scissor_xmin_value(builder, context_ptr); 334 xmin = lp_build_broadcast(builder, vec_type, xmin); 335 336 ymin = lp_jit_context_scissor_ymin_value(builder, context_ptr); 337 ymin = lp_build_broadcast(builder, vec_type, ymin); 338 339 xmax = lp_jit_context_scissor_xmax_value(builder, context_ptr); 340 xmax = lp_build_broadcast(builder, vec_type, xmax); 341 342 ymax = lp_jit_context_scissor_ymax_value(builder, context_ptr); 343 ymax = lp_build_broadcast(builder, vec_type, ymax); 344 345 /* compare the fragment's position coordinates against the scissor bounds */ 346 m0 = lp_build_compare(builder, type, PIPE_FUNC_GEQUAL, xpos, xmin); 347 m1 = lp_build_compare(builder, type, PIPE_FUNC_GEQUAL, ypos, ymin); 348 m2 = lp_build_compare(builder, type, PIPE_FUNC_LESS, xpos, xmax); 349 m3 = lp_build_compare(builder, type, PIPE_FUNC_LESS, ypos, ymax); 350 351 /* AND all the masks together */ 352 m = LLVMBuildAnd(builder, m0, m1, ""); 353 m = LLVMBuildAnd(builder, m, m2, ""); 354 m = LLVMBuildAnd(builder, m, m3, ""); 355 356 lp_build_name(m, "scissormask"); 357 358 return m; 359} 360 361 362static LLVMValueRef 363build_int32_vec_const(int value) 364{ 365 struct lp_type i32_type; 366 367 memset(&i32_type, 0, sizeof i32_type); 368 i32_type.floating = FALSE; /* values are integers */ 369 i32_type.sign = TRUE; /* values are signed */ 370 i32_type.norm = FALSE; /* values are not normalized */ 371 i32_type.width = 32; /* 32-bit int values */ 372 i32_type.length = 4; /* 4 elements per vector */ 373 return lp_build_const_int_vec(i32_type, value); 374} 375 376 377 378/** 379 * Generate the fragment shader, depth/stencil test, and alpha tests. 380 * \param i which quad in the tile, in range [0,3] 381 * \param do_tri_test if 1, do triangle edge in/out testing 382 */ 383static void 384generate_fs(struct llvmpipe_context *lp, 385 struct lp_fragment_shader *shader, 386 const struct lp_fragment_shader_variant_key *key, 387 LLVMBuilderRef builder, 388 struct lp_type type, 389 LLVMValueRef context_ptr, 390 unsigned i, 391 const struct lp_build_interp_soa_context *interp, 392 struct lp_build_sampler_soa *sampler, 393 LLVMValueRef *pmask, 394 LLVMValueRef (*color)[4], 395 LLVMValueRef depth_ptr, 396 unsigned do_tri_test, 397 LLVMValueRef c0, 398 LLVMValueRef c1, 399 LLVMValueRef c2, 400 LLVMValueRef step0_ptr, 401 LLVMValueRef step1_ptr, 402 LLVMValueRef step2_ptr) 403{ 404 const struct tgsi_token *tokens = shader->base.tokens; 405 LLVMTypeRef elem_type; 406 LLVMTypeRef vec_type; 407 LLVMTypeRef int_vec_type; 408 LLVMValueRef consts_ptr; 409 LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS]; 410 LLVMValueRef z = interp->pos[2]; 411 LLVMValueRef stencil_refs; 412 struct lp_build_flow_context *flow; 413 struct lp_build_mask_context mask; 414 boolean early_depth_stencil_test; 415 unsigned attrib; 416 unsigned chan; 417 unsigned cbuf; 418 419 assert(i < 4); 420 421 stencil_refs = lp_jit_context_stencil_ref_values(builder, context_ptr); 422 423 elem_type = lp_build_elem_type(type); 424 vec_type = lp_build_vec_type(type); 425 int_vec_type = lp_build_int_vec_type(type); 426 427 consts_ptr = lp_jit_context_constants(builder, context_ptr); 428 429 flow = lp_build_flow_create(builder); 430 431 memset(outputs, 0, sizeof outputs); 432 433 lp_build_flow_scope_begin(flow); 434 435 /* Declare the color and z variables */ 436 for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { 437 for(chan = 0; chan < NUM_CHANNELS; ++chan) { 438 color[cbuf][chan] = LLVMGetUndef(vec_type); 439 lp_build_flow_scope_declare(flow, &color[cbuf][chan]); 440 } 441 } 442 lp_build_flow_scope_declare(flow, &z); 443 444 /* do triangle edge testing */ 445 if (do_tri_test) { 446 generate_tri_edge_mask(builder, i, pmask, 447 c0, c1, c2, step0_ptr, step1_ptr, step2_ptr); 448 } 449 else { 450 *pmask = build_int32_vec_const(~0); 451 } 452 453 /* 'mask' will control execution based on quad's pixel alive/killed state */ 454 lp_build_mask_begin(&mask, flow, type, *pmask); 455 456 if (key->scissor) { 457 LLVMValueRef smask = 458 generate_scissor_test(builder, context_ptr, interp, type); 459 lp_build_mask_update(&mask, smask); 460 } 461 462 early_depth_stencil_test = 463 (key->depth.enabled || key->stencil[0].enabled) && 464 !key->alpha.enabled && 465 !shader->info.uses_kill && 466 !shader->info.writes_z; 467 468 if (early_depth_stencil_test) 469 generate_depth_stencil(builder, key, 470 type, &mask, 471 stencil_refs, z, depth_ptr); 472 473 lp_build_tgsi_soa(builder, tokens, type, &mask, 474 consts_ptr, interp->pos, interp->inputs, 475 outputs, sampler); 476 477 for (attrib = 0; attrib < shader->info.num_outputs; ++attrib) { 478 for(chan = 0; chan < NUM_CHANNELS; ++chan) { 479 if(outputs[attrib][chan]) { 480 LLVMValueRef out = LLVMBuildLoad(builder, outputs[attrib][chan], ""); 481 lp_build_name(out, "output%u.%u.%c", i, attrib, "xyzw"[chan]); 482 483 switch (shader->info.output_semantic_name[attrib]) { 484 case TGSI_SEMANTIC_COLOR: 485 { 486 unsigned cbuf = shader->info.output_semantic_index[attrib]; 487 488 lp_build_name(out, "color%u.%u.%c", i, attrib, "rgba"[chan]); 489 490 /* Alpha test */ 491 /* XXX: should the alpha reference value be passed separately? */ 492 /* XXX: should only test the final assignment to alpha */ 493 if(cbuf == 0 && chan == 3) { 494 LLVMValueRef alpha = out; 495 LLVMValueRef alpha_ref_value; 496 alpha_ref_value = lp_jit_context_alpha_ref_value(builder, context_ptr); 497 alpha_ref_value = lp_build_broadcast(builder, vec_type, alpha_ref_value); 498 lp_build_alpha_test(builder, &key->alpha, type, 499 &mask, alpha, alpha_ref_value); 500 } 501 502 color[cbuf][chan] = out; 503 break; 504 } 505 506 case TGSI_SEMANTIC_POSITION: 507 if(chan == 2) 508 z = out; 509 break; 510 } 511 } 512 } 513 } 514 515 if (!early_depth_stencil_test) 516 generate_depth_stencil(builder, key, 517 type, &mask, 518 stencil_refs, z, depth_ptr); 519 520 lp_build_mask_end(&mask); 521 522 lp_build_flow_scope_end(flow); 523 524 lp_build_flow_destroy(flow); 525 526 *pmask = mask.value; 527 528} 529 530 531/** 532 * Generate color blending and color output. 533 */ 534static void 535generate_blend(const struct pipe_blend_state *blend, 536 LLVMBuilderRef builder, 537 struct lp_type type, 538 LLVMValueRef context_ptr, 539 LLVMValueRef mask, 540 LLVMValueRef *src, 541 LLVMValueRef dst_ptr) 542{ 543 struct lp_build_context bld; 544 struct lp_build_flow_context *flow; 545 struct lp_build_mask_context mask_ctx; 546 LLVMTypeRef vec_type; 547 LLVMTypeRef int_vec_type; 548 LLVMValueRef const_ptr; 549 LLVMValueRef con[4]; 550 LLVMValueRef dst[4]; 551 LLVMValueRef res[4]; 552 unsigned chan; 553 554 lp_build_context_init(&bld, builder, type); 555 556 flow = lp_build_flow_create(builder); 557 558 /* we'll use this mask context to skip blending if all pixels are dead */ 559 lp_build_mask_begin(&mask_ctx, flow, type, mask); 560 561 vec_type = lp_build_vec_type(type); 562 int_vec_type = lp_build_int_vec_type(type); 563 564 const_ptr = lp_jit_context_blend_color(builder, context_ptr); 565 const_ptr = LLVMBuildBitCast(builder, const_ptr, 566 LLVMPointerType(vec_type, 0), ""); 567 568 for(chan = 0; chan < 4; ++chan) { 569 LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0); 570 con[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, const_ptr, &index, 1, ""), ""); 571 572 dst[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dst_ptr, &index, 1, ""), ""); 573 574 lp_build_name(con[chan], "con.%c", "rgba"[chan]); 575 lp_build_name(dst[chan], "dst.%c", "rgba"[chan]); 576 } 577 578 lp_build_blend_soa(builder, blend, type, src, dst, con, res); 579 580 for(chan = 0; chan < 4; ++chan) { 581 if(blend->rt[0].colormask & (1 << chan)) { 582 LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0); 583 lp_build_name(res[chan], "res.%c", "rgba"[chan]); 584 res[chan] = lp_build_select(&bld, mask, res[chan], dst[chan]); 585 LLVMBuildStore(builder, res[chan], LLVMBuildGEP(builder, dst_ptr, &index, 1, "")); 586 } 587 } 588 589 lp_build_mask_end(&mask_ctx); 590 lp_build_flow_destroy(flow); 591} 592 593 594/** casting function to avoid compiler warnings */ 595static lp_jit_frag_func 596cast_voidptr_to_lp_jit_frag_func(void *p) 597{ 598 union { 599 void *v; 600 lp_jit_frag_func f; 601 } tmp; 602 assert(sizeof(tmp.v) == sizeof(tmp.f)); 603 tmp.v = p; 604 return tmp.f; 605} 606 607 608/** 609 * Generate the runtime callable function for the whole fragment pipeline. 610 * Note that the function which we generate operates on a block of 16 611 * pixels at at time. The block contains 2x2 quads. Each quad contains 612 * 2x2 pixels. 613 */ 614static void 615generate_fragment(struct llvmpipe_context *lp, 616 struct lp_fragment_shader *shader, 617 struct lp_fragment_shader_variant *variant, 618 unsigned do_tri_test) 619{ 620 struct llvmpipe_screen *screen = llvmpipe_screen(lp->pipe.screen); 621 const struct lp_fragment_shader_variant_key *key = &variant->key; 622 struct lp_type fs_type; 623 struct lp_type blend_type; 624 LLVMTypeRef fs_elem_type; 625 LLVMTypeRef fs_vec_type; 626 LLVMTypeRef fs_int_vec_type; 627 LLVMTypeRef blend_vec_type; 628 LLVMTypeRef blend_int_vec_type; 629 LLVMTypeRef arg_types[14]; 630 LLVMTypeRef func_type; 631 LLVMTypeRef int32_vec4_type = lp_build_int32_vec4_type(); 632 LLVMValueRef context_ptr; 633 LLVMValueRef x; 634 LLVMValueRef y; 635 LLVMValueRef a0_ptr; 636 LLVMValueRef dadx_ptr; 637 LLVMValueRef dady_ptr; 638 LLVMValueRef color_ptr_ptr; 639 LLVMValueRef depth_ptr; 640 LLVMValueRef c0, c1, c2, step0_ptr, step1_ptr, step2_ptr; 641 LLVMBasicBlockRef block; 642 LLVMBuilderRef builder; 643 LLVMValueRef x0; 644 LLVMValueRef y0; 645 struct lp_build_sampler_soa *sampler; 646 struct lp_build_interp_soa_context interp; 647 LLVMValueRef fs_mask[LP_MAX_VECTOR_LENGTH]; 648 LLVMValueRef fs_out_color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS][LP_MAX_VECTOR_LENGTH]; 649 LLVMValueRef blend_mask; 650 LLVMValueRef blend_in_color[NUM_CHANNELS]; 651 LLVMValueRef function; 652 unsigned num_fs; 653 unsigned i; 654 unsigned chan; 655 unsigned cbuf; 656 657 658 /* TODO: actually pick these based on the fs and color buffer 659 * characteristics. */ 660 661 memset(&fs_type, 0, sizeof fs_type); 662 fs_type.floating = TRUE; /* floating point values */ 663 fs_type.sign = TRUE; /* values are signed */ 664 fs_type.norm = FALSE; /* values are not limited to [0,1] or [-1,1] */ 665 fs_type.width = 32; /* 32-bit float */ 666 fs_type.length = 4; /* 4 elements per vector */ 667 num_fs = 4; /* number of quads per block */ 668 669 memset(&blend_type, 0, sizeof blend_type); 670 blend_type.floating = FALSE; /* values are integers */ 671 blend_type.sign = FALSE; /* values are unsigned */ 672 blend_type.norm = TRUE; /* values are in [0,1] or [-1,1] */ 673 blend_type.width = 8; /* 8-bit ubyte values */ 674 blend_type.length = 16; /* 16 elements per vector */ 675 676 /* 677 * Generate the function prototype. Any change here must be reflected in 678 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa. 679 */ 680 681 fs_elem_type = lp_build_elem_type(fs_type); 682 fs_vec_type = lp_build_vec_type(fs_type); 683 fs_int_vec_type = lp_build_int_vec_type(fs_type); 684 685 blend_vec_type = lp_build_vec_type(blend_type); 686 blend_int_vec_type = lp_build_int_vec_type(blend_type); 687 688 arg_types[0] = screen->context_ptr_type; /* context */ 689 arg_types[1] = LLVMInt32Type(); /* x */ 690 arg_types[2] = LLVMInt32Type(); /* y */ 691 arg_types[3] = LLVMPointerType(fs_elem_type, 0); /* a0 */ 692 arg_types[4] = LLVMPointerType(fs_elem_type, 0); /* dadx */ 693 arg_types[5] = LLVMPointerType(fs_elem_type, 0); /* dady */ 694 arg_types[6] = LLVMPointerType(LLVMPointerType(blend_vec_type, 0), 0); /* color */ 695 arg_types[7] = LLVMPointerType(fs_int_vec_type, 0); /* depth */ 696 arg_types[8] = LLVMInt32Type(); /* c0 */ 697 arg_types[9] = LLVMInt32Type(); /* c1 */ 698 arg_types[10] = LLVMInt32Type(); /* c2 */ 699 /* Note: the step arrays are built as int32[16] but we interpret 700 * them here as int32_vec4[4]. 701 */ 702 arg_types[11] = LLVMPointerType(int32_vec4_type, 0);/* step0 */ 703 arg_types[12] = LLVMPointerType(int32_vec4_type, 0);/* step1 */ 704 arg_types[13] = LLVMPointerType(int32_vec4_type, 0);/* step2 */ 705 706 func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0); 707 708 function = LLVMAddFunction(screen->module, "shader", func_type); 709 LLVMSetFunctionCallConv(function, LLVMCCallConv); 710 711 variant->function[do_tri_test] = function; 712 713 714 /* XXX: need to propagate noalias down into color param now we are 715 * passing a pointer-to-pointer? 716 */ 717 for(i = 0; i < Elements(arg_types); ++i) 718 if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind) 719 LLVMAddAttribute(LLVMGetParam(function, i), LLVMNoAliasAttribute); 720 721 context_ptr = LLVMGetParam(function, 0); 722 x = LLVMGetParam(function, 1); 723 y = LLVMGetParam(function, 2); 724 a0_ptr = LLVMGetParam(function, 3); 725 dadx_ptr = LLVMGetParam(function, 4); 726 dady_ptr = LLVMGetParam(function, 5); 727 color_ptr_ptr = LLVMGetParam(function, 6); 728 depth_ptr = LLVMGetParam(function, 7); 729 c0 = LLVMGetParam(function, 8); 730 c1 = LLVMGetParam(function, 9); 731 c2 = LLVMGetParam(function, 10); 732 step0_ptr = LLVMGetParam(function, 11); 733 step1_ptr = LLVMGetParam(function, 12); 734 step2_ptr = LLVMGetParam(function, 13); 735 736 lp_build_name(context_ptr, "context"); 737 lp_build_name(x, "x"); 738 lp_build_name(y, "y"); 739 lp_build_name(a0_ptr, "a0"); 740 lp_build_name(dadx_ptr, "dadx"); 741 lp_build_name(dady_ptr, "dady"); 742 lp_build_name(color_ptr_ptr, "color_ptr"); 743 lp_build_name(depth_ptr, "depth"); 744 lp_build_name(c0, "c0"); 745 lp_build_name(c1, "c1"); 746 lp_build_name(c2, "c2"); 747 lp_build_name(step0_ptr, "step0"); 748 lp_build_name(step1_ptr, "step1"); 749 lp_build_name(step2_ptr, "step2"); 750 751 /* 752 * Function body 753 */ 754 755 block = LLVMAppendBasicBlock(function, "entry"); 756 builder = LLVMCreateBuilder(); 757 LLVMPositionBuilderAtEnd(builder, block); 758 759 generate_pos0(builder, x, y, &x0, &y0); 760 761 lp_build_interp_soa_init(&interp, 762 shader->base.tokens, 763 key->flatshade, 764 builder, fs_type, 765 a0_ptr, dadx_ptr, dady_ptr, 766 x0, y0); 767 768 /* code generated texture sampling */ 769 sampler = lp_llvm_sampler_soa_create(key->sampler, context_ptr); 770 771 /* loop over quads in the block */ 772 for(i = 0; i < num_fs; ++i) { 773 LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0); 774 LLVMValueRef out_color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS]; 775 LLVMValueRef depth_ptr_i; 776 int cbuf; 777 778 if(i != 0) 779 lp_build_interp_soa_update(&interp, i); 780 781 depth_ptr_i = LLVMBuildGEP(builder, depth_ptr, &index, 1, ""); 782 783 generate_fs(lp, shader, key, 784 builder, 785 fs_type, 786 context_ptr, 787 i, 788 &interp, 789 sampler, 790 &fs_mask[i], /* output */ 791 out_color, 792 depth_ptr_i, 793 do_tri_test, 794 c0, c1, c2, 795 step0_ptr, step1_ptr, step2_ptr); 796 797 for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) 798 for(chan = 0; chan < NUM_CHANNELS; ++chan) 799 fs_out_color[cbuf][chan][i] = out_color[cbuf][chan]; 800 } 801 802 sampler->destroy(sampler); 803 804 /* Loop over color outputs / color buffers to do blending. 805 */ 806 for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { 807 LLVMValueRef color_ptr; 808 LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), cbuf, 0); 809 810 /* 811 * Convert the fs's output color and mask to fit to the blending type. 812 */ 813 for(chan = 0; chan < NUM_CHANNELS; ++chan) { 814 lp_build_conv(builder, fs_type, blend_type, 815 fs_out_color[cbuf][chan], num_fs, 816 &blend_in_color[chan], 1); 817 lp_build_name(blend_in_color[chan], "color%d.%c", cbuf, "rgba"[chan]); 818 } 819 820 lp_build_conv_mask(builder, fs_type, blend_type, 821 fs_mask, num_fs, 822 &blend_mask, 1); 823 824 color_ptr = LLVMBuildLoad(builder, 825 LLVMBuildGEP(builder, color_ptr_ptr, &index, 1, ""), 826 ""); 827 lp_build_name(color_ptr, "color_ptr%d", cbuf); 828 829 /* 830 * Blending. 831 */ 832 generate_blend(&key->blend, 833 builder, 834 blend_type, 835 context_ptr, 836 blend_mask, 837 blend_in_color, 838 color_ptr); 839 } 840 841 LLVMBuildRetVoid(builder); 842 843 LLVMDisposeBuilder(builder); 844 845 846 /* Verify the LLVM IR. If invalid, dump and abort */ 847#ifdef DEBUG 848 if(LLVMVerifyFunction(function, LLVMPrintMessageAction)) { 849 if (1) 850 LLVMDumpValue(function); 851 abort(); 852 } 853#endif 854 855 /* Apply optimizations to LLVM IR */ 856 if (1) 857 LLVMRunFunctionPassManager(screen->pass, function); 858 859 if (LP_DEBUG & DEBUG_JIT) { 860 /* Print the LLVM IR to stderr */ 861 LLVMDumpValue(function); 862 debug_printf("\n"); 863 } 864 865 /* 866 * Translate the LLVM IR into machine code. 867 */ 868 { 869 void *f = LLVMGetPointerToGlobal(screen->engine, function); 870 871 variant->jit_function[do_tri_test] = cast_voidptr_to_lp_jit_frag_func(f); 872 873 if (LP_DEBUG & DEBUG_ASM) 874 lp_disassemble(f); 875 } 876} 877 878 879static struct lp_fragment_shader_variant * 880generate_variant(struct llvmpipe_context *lp, 881 struct lp_fragment_shader *shader, 882 const struct lp_fragment_shader_variant_key *key) 883{ 884 struct lp_fragment_shader_variant *variant; 885 886 if (LP_DEBUG & DEBUG_JIT) { 887 unsigned i; 888 889 tgsi_dump(shader->base.tokens, 0); 890 if(key->depth.enabled) { 891 debug_printf("depth.format = %s\n", util_format_name(key->zsbuf_format)); 892 debug_printf("depth.func = %s\n", util_dump_func(key->depth.func, TRUE)); 893 debug_printf("depth.writemask = %u\n", key->depth.writemask); 894 } 895 if(key->alpha.enabled) { 896 debug_printf("alpha.func = %s\n", util_dump_func(key->alpha.func, TRUE)); 897 debug_printf("alpha.ref_value = %f\n", key->alpha.ref_value); 898 } 899 if(key->blend.logicop_enable) { 900 debug_printf("blend.logicop_func = %u\n", key->blend.logicop_func); 901 } 902 else if(key->blend.rt[0].blend_enable) { 903 debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key->blend.rt[0].rgb_func, TRUE)); 904 debug_printf("rgb_src_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].rgb_src_factor, TRUE)); 905 debug_printf("rgb_dst_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].rgb_dst_factor, TRUE)); 906 debug_printf("alpha_func = %s\n", util_dump_blend_func (key->blend.rt[0].alpha_func, TRUE)); 907 debug_printf("alpha_src_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].alpha_src_factor, TRUE)); 908 debug_printf("alpha_dst_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].alpha_dst_factor, TRUE)); 909 } 910 debug_printf("blend.colormask = 0x%x\n", key->blend.rt[0].colormask); 911 for(i = 0; i < PIPE_MAX_SAMPLERS; ++i) { 912 if(key->sampler[i].format) { 913 debug_printf("sampler[%u] = \n", i); 914 debug_printf(" .format = %s\n", 915 util_format_name(key->sampler[i].format)); 916 debug_printf(" .target = %s\n", 917 util_dump_tex_target(key->sampler[i].target, TRUE)); 918 debug_printf(" .pot = %u %u %u\n", 919 key->sampler[i].pot_width, 920 key->sampler[i].pot_height, 921 key->sampler[i].pot_depth); 922 debug_printf(" .wrap = %s %s %s\n", 923 util_dump_tex_wrap(key->sampler[i].wrap_s, TRUE), 924 util_dump_tex_wrap(key->sampler[i].wrap_t, TRUE), 925 util_dump_tex_wrap(key->sampler[i].wrap_r, TRUE)); 926 debug_printf(" .min_img_filter = %s\n", 927 util_dump_tex_filter(key->sampler[i].min_img_filter, TRUE)); 928 debug_printf(" .min_mip_filter = %s\n", 929 util_dump_tex_mipfilter(key->sampler[i].min_mip_filter, TRUE)); 930 debug_printf(" .mag_img_filter = %s\n", 931 util_dump_tex_filter(key->sampler[i].mag_img_filter, TRUE)); 932 if(key->sampler[i].compare_mode != PIPE_TEX_COMPARE_NONE) 933 debug_printf(" .compare_func = %s\n", util_dump_func(key->sampler[i].compare_func, TRUE)); 934 debug_printf(" .normalized_coords = %u\n", key->sampler[i].normalized_coords); 935 } 936 } 937 } 938 939 variant = CALLOC_STRUCT(lp_fragment_shader_variant); 940 if(!variant) 941 return NULL; 942 943 variant->shader = shader; 944 memcpy(&variant->key, key, sizeof *key); 945 946 generate_fragment(lp, shader, variant, 0); 947 generate_fragment(lp, shader, variant, 1); 948 949 /* insert new variant into linked list */ 950 variant->next = shader->variants; 951 shader->variants = variant; 952 953 return variant; 954} 955 956 957void * 958llvmpipe_create_fs_state(struct pipe_context *pipe, 959 const struct pipe_shader_state *templ) 960{ 961 struct lp_fragment_shader *shader; 962 963 shader = CALLOC_STRUCT(lp_fragment_shader); 964 if (!shader) 965 return NULL; 966 967 /* get/save the summary info for this shader */ 968 tgsi_scan_shader(templ->tokens, &shader->info); 969 970 /* we need to keep a local copy of the tokens */ 971 shader->base.tokens = tgsi_dup_tokens(templ->tokens); 972 973 return shader; 974} 975 976 977void 978llvmpipe_bind_fs_state(struct pipe_context *pipe, void *fs) 979{ 980 struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); 981 982 if (llvmpipe->fs == fs) 983 return; 984 985 draw_flush(llvmpipe->draw); 986 987 llvmpipe->fs = fs; 988 989 llvmpipe->dirty |= LP_NEW_FS; 990} 991 992 993void 994llvmpipe_delete_fs_state(struct pipe_context *pipe, void *fs) 995{ 996 struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); 997 struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen); 998 struct lp_fragment_shader *shader = fs; 999 struct lp_fragment_shader_variant *variant; 1000 1001 assert(fs != llvmpipe->fs); 1002 (void) llvmpipe; 1003 1004 /* 1005 * XXX: we need to flush the context until we have some sort of reference 1006 * counting in fragment shaders as they may still be binned 1007 */ 1008 draw_flush(llvmpipe->draw); 1009 lp_setup_flush(llvmpipe->setup, 0); 1010 1011 variant = shader->variants; 1012 while(variant) { 1013 struct lp_fragment_shader_variant *next = variant->next; 1014 unsigned i; 1015 1016 for (i = 0; i < Elements(variant->function); i++) { 1017 if (variant->function[i]) { 1018 if (variant->jit_function[i]) 1019 LLVMFreeMachineCodeForFunction(screen->engine, 1020 variant->function[i]); 1021 LLVMDeleteFunction(variant->function[i]); 1022 } 1023 } 1024 1025 FREE(variant); 1026 1027 variant = next; 1028 } 1029 1030 FREE((void *) shader->base.tokens); 1031 FREE(shader); 1032} 1033 1034 1035 1036void 1037llvmpipe_set_constant_buffer(struct pipe_context *pipe, 1038 uint shader, uint index, 1039 struct pipe_buffer *constants) 1040{ 1041 struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); 1042 unsigned size = constants ? constants->size : 0; 1043 const void *data = constants ? llvmpipe_buffer(constants)->data : NULL; 1044 1045 assert(shader < PIPE_SHADER_TYPES); 1046 assert(index == 0); 1047 1048 if(llvmpipe->constants[shader] == constants) 1049 return; 1050 1051 draw_flush(llvmpipe->draw); 1052 1053 /* note: reference counting */ 1054 pipe_buffer_reference(&llvmpipe->constants[shader], constants); 1055 1056 if(shader == PIPE_SHADER_VERTEX) { 1057 draw_set_mapped_constant_buffer(llvmpipe->draw, PIPE_SHADER_VERTEX, 0, 1058 data, size); 1059 } 1060 1061 llvmpipe->dirty |= LP_NEW_CONSTANTS; 1062} 1063 1064 1065/** 1066 * We need to generate several variants of the fragment pipeline to match 1067 * all the combinations of the contributing state atoms. 1068 * 1069 * TODO: there is actually no reason to tie this to context state -- the 1070 * generated code could be cached globally in the screen. 1071 */ 1072static void 1073make_variant_key(struct llvmpipe_context *lp, 1074 struct lp_fragment_shader *shader, 1075 struct lp_fragment_shader_variant_key *key) 1076{ 1077 unsigned i; 1078 1079 memset(key, 0, sizeof *key); 1080 1081 if (lp->framebuffer.zsbuf) { 1082 if (lp->depth_stencil->depth.enabled) { 1083 key->zsbuf_format = lp->framebuffer.zsbuf->format; 1084 memcpy(&key->depth, &lp->depth_stencil->depth, sizeof key->depth); 1085 } 1086 if (lp->depth_stencil->stencil[0].enabled) { 1087 key->zsbuf_format = lp->framebuffer.zsbuf->format; 1088 memcpy(&key->stencil, &lp->depth_stencil->stencil, sizeof key->stencil); 1089 } 1090 } 1091 1092 key->alpha.enabled = lp->depth_stencil->alpha.enabled; 1093 if(key->alpha.enabled) 1094 key->alpha.func = lp->depth_stencil->alpha.func; 1095 /* alpha.ref_value is passed in jit_context */ 1096 1097 key->flatshade = lp->rasterizer->flatshade; 1098 key->scissor = lp->rasterizer->scissor; 1099 1100 if (lp->framebuffer.nr_cbufs) { 1101 memcpy(&key->blend, lp->blend, sizeof key->blend); 1102 } 1103 1104 key->nr_cbufs = lp->framebuffer.nr_cbufs; 1105 for (i = 0; i < lp->framebuffer.nr_cbufs; i++) { 1106 const struct util_format_description *format_desc; 1107 unsigned chan; 1108 1109 format_desc = util_format_description(lp->framebuffer.cbufs[i]->format); 1110 assert(format_desc->layout == UTIL_FORMAT_COLORSPACE_RGB || 1111 format_desc->layout == UTIL_FORMAT_COLORSPACE_SRGB); 1112 1113 /* mask out color channels not present in the color buffer. 1114 * Should be simple to incorporate per-cbuf writemasks: 1115 */ 1116 for(chan = 0; chan < 4; ++chan) { 1117 enum util_format_swizzle swizzle = format_desc->swizzle[chan]; 1118 1119 if(swizzle <= UTIL_FORMAT_SWIZZLE_W) 1120 key->blend.rt[0].colormask |= (1 << chan); 1121 } 1122 } 1123 1124 for(i = 0; i < PIPE_MAX_SAMPLERS; ++i) 1125 if(shader->info.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) 1126 lp_sampler_static_state(&key->sampler[i], lp->fragment_sampler_views[i]->texture, lp->sampler[i]); 1127} 1128 1129 1130/** 1131 * Update fragment state. This is called just prior to drawing 1132 * something when some fragment-related state has changed. 1133 */ 1134void 1135llvmpipe_update_fs(struct llvmpipe_context *lp) 1136{ 1137 struct lp_fragment_shader *shader = lp->fs; 1138 struct lp_fragment_shader_variant_key key; 1139 struct lp_fragment_shader_variant *variant; 1140 boolean opaque; 1141 1142 make_variant_key(lp, shader, &key); 1143 1144 variant = shader->variants; 1145 while(variant) { 1146 if(memcmp(&variant->key, &key, sizeof key) == 0) 1147 break; 1148 1149 variant = variant->next; 1150 } 1151 1152 if (!variant) { 1153 int64_t t0, t1; 1154 int64_t dt; 1155 t0 = os_time_get(); 1156 1157 variant = generate_variant(lp, shader, &key); 1158 1159 t1 = os_time_get(); 1160 dt = t1 - t0; 1161 LP_COUNT_ADD(llvm_compile_time, dt); 1162 LP_COUNT_ADD(nr_llvm_compiles, 2); /* emit vs. omit in/out test */ 1163 } 1164 1165 shader->current = variant; 1166 1167 /* TODO: put this in the variant */ 1168 /* TODO: most of these can be relaxed, in particular the colormask */ 1169 opaque = !key.blend.logicop_enable && 1170 !key.blend.rt[0].blend_enable && 1171 key.blend.rt[0].colormask == 0xf && 1172 !key.alpha.enabled && 1173 !key.depth.enabled && 1174 !key.scissor && 1175 !shader->info.uses_kill 1176 ? TRUE : FALSE; 1177 1178 lp_setup_set_fs_functions(lp->setup, 1179 shader->current->jit_function[0], 1180 shader->current->jit_function[1], 1181 opaque); 1182} 1183