1 /************************************************************************** 2 * 3 * Copyright 2010 VMware. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 29 #include "util/u_math.h" 30 #include "util/u_memory.h" 31 #include "util/u_simple_list.h" 32 #include "os/os_time.h" 33 #include "gallivm/lp_bld_arit.h" 34 #include "gallivm/lp_bld_const.h" 35 #include "gallivm/lp_bld_debug.h" 36 #include "gallivm/lp_bld_init.h" 37 #include "gallivm/lp_bld_logic.h" 38 #include "gallivm/lp_bld_intr.h" 39 #include "gallivm/lp_bld_flow.h" 40 #include "gallivm/lp_bld_type.h" 41 42 #include "lp_perf.h" 43 #include "lp_debug.h" 44 #include "lp_flush.h" 45 #include "lp_screen.h" 46 #include "lp_context.h" 47 #include "lp_state.h" 48 #include "lp_state_fs.h" 49 #include "lp_state_setup.h" 50 51 52 53 /* currently organized to interpolate full float[4] attributes even 54 * when some elements are unused. Later, can pack vertex data more 55 * closely. 56 */ 57 58 59 struct lp_setup_args 60 { 61 /* Function arguments: 62 */ 63 LLVMValueRef v0; 64 LLVMValueRef v1; 65 LLVMValueRef v2; 66 LLVMValueRef facing; /* boolean */ 67 LLVMValueRef a0; 68 LLVMValueRef dadx; 69 LLVMValueRef dady; 70 71 /* Derived: 72 */ 73 LLVMValueRef x0_center; 74 LLVMValueRef y0_center; 75 LLVMValueRef dy20_ooa; 76 LLVMValueRef dy01_ooa; 77 LLVMValueRef dx20_ooa; 78 LLVMValueRef dx01_ooa; 79 }; 80 81 82 83 static LLVMTypeRef 84 type4f(struct gallivm_state *gallivm) 85 { 86 return LLVMVectorType(LLVMFloatTypeInContext(gallivm->context), 4); 87 } 88 89 90 /* Equivalent of _mm_setr_ps(a,b,c,d) 91 */ 92 static LLVMValueRef 93 vec4f(struct gallivm_state *gallivm, 94 LLVMValueRef a, LLVMValueRef b, LLVMValueRef c, LLVMValueRef d, 95 const char *name) 96 { 97 LLVMBuilderRef bld = gallivm->builder; 98 LLVMValueRef i0 = lp_build_const_int32(gallivm, 0); 99 LLVMValueRef i1 = lp_build_const_int32(gallivm, 1); 100 LLVMValueRef i2 = lp_build_const_int32(gallivm, 2); 101 LLVMValueRef i3 = lp_build_const_int32(gallivm, 3); 102 103 LLVMValueRef res = LLVMGetUndef(type4f(gallivm)); 104 105 res = LLVMBuildInsertElement(bld, res, a, i0, ""); 106 res = LLVMBuildInsertElement(bld, res, b, i1, ""); 107 res = LLVMBuildInsertElement(bld, res, c, i2, ""); 108 res = LLVMBuildInsertElement(bld, res, d, i3, name); 109 110 return res; 111 } 112 113 /* Equivalent of _mm_set1_ps(a) 114 */ 115 static LLVMValueRef 116 vec4f_from_scalar(struct gallivm_state *gallivm, 117 LLVMValueRef a, 118 const char *name) 119 { 120 LLVMBuilderRef bld = gallivm->builder; 121 LLVMValueRef res = LLVMGetUndef(type4f(gallivm)); 122 int i; 123 124 for(i = 0; i < 4; ++i) { 125 LLVMValueRef index = lp_build_const_int32(gallivm, i); 126 res = LLVMBuildInsertElement(bld, res, a, index, i == 3 ? name : ""); 127 } 128 129 return res; 130 } 131 132 static void 133 store_coef(struct gallivm_state *gallivm, 134 struct lp_setup_args *args, 135 unsigned slot, 136 LLVMValueRef a0, 137 LLVMValueRef dadx, 138 LLVMValueRef dady) 139 { 140 LLVMBuilderRef builder = gallivm->builder; 141 LLVMValueRef idx = lp_build_const_int32(gallivm, slot); 142 143 LLVMBuildStore(builder, 144 a0, 145 LLVMBuildGEP(builder, args->a0, &idx, 1, "")); 146 147 LLVMBuildStore(builder, 148 dadx, 149 LLVMBuildGEP(builder, args->dadx, &idx, 1, "")); 150 151 LLVMBuildStore(builder, 152 dady, 153 LLVMBuildGEP(builder, args->dady, &idx, 1, "")); 154 } 155 156 157 158 static void 159 emit_constant_coef4(struct gallivm_state *gallivm, 160 struct lp_setup_args *args, 161 unsigned slot, 162 LLVMValueRef vert) 163 { 164 LLVMValueRef zero = lp_build_const_float(gallivm, 0.0); 165 LLVMValueRef zerovec = vec4f_from_scalar(gallivm, zero, "zero"); 166 store_coef(gallivm, args, slot, vert, zerovec, zerovec); 167 } 168 169 170 171 /** 172 * Setup the fragment input attribute with the front-facing value. 173 * \param frontface is the triangle front facing? 174 */ 175 static void 176 emit_facing_coef(struct gallivm_state *gallivm, 177 struct lp_setup_args *args, 178 unsigned slot ) 179 { 180 LLVMBuilderRef builder = gallivm->builder; 181 LLVMTypeRef float_type = LLVMFloatTypeInContext(gallivm->context); 182 LLVMValueRef a0_0 = args->facing; 183 LLVMValueRef a0_0f = LLVMBuildSIToFP(builder, a0_0, float_type, ""); 184 LLVMValueRef zero = lp_build_const_float(gallivm, 0.0); 185 LLVMValueRef a0 = vec4f(gallivm, a0_0f, zero, zero, zero, "facing"); 186 LLVMValueRef zerovec = vec4f_from_scalar(gallivm, zero, "zero"); 187 188 store_coef(gallivm, args, slot, a0, zerovec, zerovec); 189 } 190 191 192 static LLVMValueRef 193 vert_attrib(struct gallivm_state *gallivm, 194 LLVMValueRef vert, 195 int attr, 196 int elem, 197 const char *name) 198 { 199 LLVMBuilderRef b = gallivm->builder; 200 LLVMValueRef idx[2]; 201 idx[0] = lp_build_const_int32(gallivm, attr); 202 idx[1] = lp_build_const_int32(gallivm, elem); 203 return LLVMBuildLoad(b, LLVMBuildGEP(b, vert, idx, 2, ""), name); 204 } 205 206 207 static void 208 lp_twoside(struct gallivm_state *gallivm, 209 struct lp_setup_args *args, 210 const struct lp_setup_variant_key *key, 211 int bcolor_slot, 212 LLVMValueRef attribv[3]) 213 { 214 LLVMBuilderRef b = gallivm->builder; 215 LLVMValueRef a0_back, a1_back, a2_back; 216 LLVMValueRef idx2 = lp_build_const_int32(gallivm, bcolor_slot); 217 218 LLVMValueRef facing = args->facing; 219 LLVMValueRef front_facing = LLVMBuildICmp(b, LLVMIntEQ, facing, lp_build_const_int32(gallivm, 0), ""); /** need i1 for if condition */ 220 221 a0_back = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v0, &idx2, 1, ""), "v0a_back"); 222 a1_back = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v1, &idx2, 1, ""), "v1a_back"); 223 a2_back = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v2, &idx2, 1, ""), "v2a_back"); 224 225 /* Possibly swap the front and back attrib values, 226 * 227 * Prefer select to if so we don't have to worry about phis or 228 * allocas. 229 */ 230 attribv[0] = LLVMBuildSelect(b, front_facing, a0_back, attribv[0], ""); 231 attribv[1] = LLVMBuildSelect(b, front_facing, a1_back, attribv[1], ""); 232 attribv[2] = LLVMBuildSelect(b, front_facing, a2_back, attribv[2], ""); 233 234 } 235 236 static void 237 lp_do_offset_tri(struct gallivm_state *gallivm, 238 struct lp_setup_args *args, 239 const struct lp_setup_variant_key *key, 240 LLVMValueRef inv_det, 241 LLVMValueRef dxyz01, 242 LLVMValueRef dxyz20, 243 LLVMValueRef attribv[3]) 244 { 245 LLVMBuilderRef b = gallivm->builder; 246 struct lp_build_context bld; 247 LLVMValueRef zoffset, mult; 248 LLVMValueRef z0_new, z1_new, z2_new; 249 LLVMValueRef dzdxdzdy, dzdx, dzdy, dzxyz20, dyzzx01, dyzzx01_dzxyz20, dzx01_dyz20; 250 LLVMValueRef z0z1, z0z1z2; 251 LLVMValueRef max, max_value, res12; 252 LLVMValueRef shuffles[4]; 253 LLVMTypeRef shuf_type = LLVMInt32TypeInContext(gallivm->context); 254 LLVMValueRef onei = lp_build_const_int32(gallivm, 1); 255 LLVMValueRef zeroi = lp_build_const_int32(gallivm, 0); 256 LLVMValueRef twoi = lp_build_const_int32(gallivm, 2); 257 LLVMValueRef threei = lp_build_const_int32(gallivm, 3); 258 259 /* (res12) = cross(e,f).xy */ 260 shuffles[0] = twoi; 261 shuffles[1] = zeroi; 262 shuffles[2] = onei; 263 shuffles[3] = twoi; 264 dzxyz20 = LLVMBuildShuffleVector(b, dxyz20, dxyz20, LLVMConstVector(shuffles, 4), ""); 265 266 shuffles[0] = onei; 267 shuffles[1] = twoi; 268 shuffles[2] = twoi; 269 shuffles[3] = zeroi; 270 dyzzx01 = LLVMBuildShuffleVector(b, dxyz01, dxyz01, LLVMConstVector(shuffles, 4), ""); 271 272 dyzzx01_dzxyz20 = LLVMBuildFMul(b, dzxyz20, dyzzx01, "dyzzx01_dzxyz20"); 273 274 shuffles[0] = twoi; 275 shuffles[1] = threei; 276 shuffles[2] = LLVMGetUndef(shuf_type); 277 shuffles[3] = LLVMGetUndef(shuf_type); 278 dzx01_dyz20 = LLVMBuildShuffleVector(b, dyzzx01_dzxyz20, dyzzx01_dzxyz20, 279 LLVMConstVector(shuffles, 4), ""); 280 281 res12 = LLVMBuildFSub(b, dyzzx01_dzxyz20, dzx01_dyz20, "res12"); 282 283 /* dzdx = fabsf(res1 * inv_det), dydx = fabsf(res2 * inv_det)*/ 284 lp_build_context_init(&bld, gallivm, lp_type_float_vec(32, 128)); 285 dzdxdzdy = LLVMBuildFMul(b, res12, inv_det, "dzdxdzdy"); 286 dzdxdzdy = lp_build_abs(&bld, dzdxdzdy); 287 288 dzdx = LLVMBuildExtractElement(b, dzdxdzdy, zeroi, ""); 289 dzdy = LLVMBuildExtractElement(b, dzdxdzdy, onei, ""); 290 291 /* zoffset = offset->units + MAX2(dzdx, dzdy) * offset->scale */ 292 max = LLVMBuildFCmp(b, LLVMRealUGT, dzdx, dzdy, ""); 293 max_value = LLVMBuildSelect(b, max, dzdx, dzdy, "max"); 294 295 mult = LLVMBuildFMul(b, max_value, lp_build_const_float(gallivm, key->scale), ""); 296 zoffset = LLVMBuildFAdd(b, lp_build_const_float(gallivm, key->units), mult, "zoffset"); 297 298 /* yuck */ 299 shuffles[0] = twoi; 300 shuffles[1] = lp_build_const_int32(gallivm, 6); 301 shuffles[2] = LLVMGetUndef(shuf_type); 302 shuffles[3] = LLVMGetUndef(shuf_type); 303 z0z1 = LLVMBuildShuffleVector(b, attribv[0], attribv[1], LLVMConstVector(shuffles, 4), ""); 304 shuffles[0] = zeroi; 305 shuffles[1] = onei; 306 shuffles[2] = lp_build_const_int32(gallivm, 6); 307 shuffles[3] = LLVMGetUndef(shuf_type); 308 z0z1z2 = LLVMBuildShuffleVector(b, z0z1, attribv[2], LLVMConstVector(shuffles, 4), ""); 309 zoffset = vec4f_from_scalar(gallivm, zoffset, ""); 310 311 /* clamp and do offset */ 312 z0z1z2 = lp_build_clamp(&bld, LLVMBuildFAdd(b, z0z1z2, zoffset, ""), bld.zero, bld.one); 313 314 /* insert into args->a0.z, a1.z, a2.z: 315 */ 316 z0_new = LLVMBuildExtractElement(b, z0z1z2, zeroi, ""); 317 z1_new = LLVMBuildExtractElement(b, z0z1z2, onei, ""); 318 z2_new = LLVMBuildExtractElement(b, z0z1z2, twoi, ""); 319 attribv[0] = LLVMBuildInsertElement(b, attribv[0], z0_new, twoi, ""); 320 attribv[1] = LLVMBuildInsertElement(b, attribv[1], z1_new, twoi, ""); 321 attribv[2] = LLVMBuildInsertElement(b, attribv[2], z2_new, twoi, ""); 322 } 323 324 static void 325 load_attribute(struct gallivm_state *gallivm, 326 struct lp_setup_args *args, 327 const struct lp_setup_variant_key *key, 328 unsigned vert_attr, 329 LLVMValueRef attribv[3]) 330 { 331 LLVMBuilderRef b = gallivm->builder; 332 LLVMValueRef idx = lp_build_const_int32(gallivm, vert_attr); 333 334 /* Load the vertex data 335 */ 336 attribv[0] = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v0, &idx, 1, ""), "v0a"); 337 attribv[1] = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v1, &idx, 1, ""), "v1a"); 338 attribv[2] = LLVMBuildLoad(b, LLVMBuildGEP(b, args->v2, &idx, 1, ""), "v2a"); 339 340 341 /* Potentially modify it according to twoside, etc: 342 */ 343 if (key->twoside) { 344 if (vert_attr == key->color_slot && key->bcolor_slot >= 0) 345 lp_twoside(gallivm, args, key, key->bcolor_slot, attribv); 346 else if (vert_attr == key->spec_slot && key->bspec_slot >= 0) 347 lp_twoside(gallivm, args, key, key->bspec_slot, attribv); 348 } 349 } 350 351 static void 352 emit_coef4( struct gallivm_state *gallivm, 353 struct lp_setup_args *args, 354 unsigned slot, 355 LLVMValueRef a0, 356 LLVMValueRef a1, 357 LLVMValueRef a2) 358 { 359 LLVMBuilderRef b = gallivm->builder; 360 LLVMValueRef dy20_ooa = args->dy20_ooa; 361 LLVMValueRef dy01_ooa = args->dy01_ooa; 362 LLVMValueRef dx20_ooa = args->dx20_ooa; 363 LLVMValueRef dx01_ooa = args->dx01_ooa; 364 LLVMValueRef x0_center = args->x0_center; 365 LLVMValueRef y0_center = args->y0_center; 366 367 LLVMValueRef da01 = LLVMBuildFSub(b, a0, a1, "da01"); 368 LLVMValueRef da20 = LLVMBuildFSub(b, a2, a0, "da20"); 369 370 /* Calculate dadx (vec4f) 371 */ 372 LLVMValueRef da01_dy20_ooa = LLVMBuildFMul(b, da01, dy20_ooa, "da01_dy20_ooa"); 373 LLVMValueRef da20_dy01_ooa = LLVMBuildFMul(b, da20, dy01_ooa, "da20_dy01_ooa"); 374 LLVMValueRef dadx = LLVMBuildFSub(b, da01_dy20_ooa, da20_dy01_ooa, "dadx"); 375 376 /* Calculate dady (vec4f) 377 */ 378 LLVMValueRef da01_dx20_ooa = LLVMBuildFMul(b, da01, dx20_ooa, "da01_dx20_ooa"); 379 LLVMValueRef da20_dx01_ooa = LLVMBuildFMul(b, da20, dx01_ooa, "da20_dx01_ooa"); 380 LLVMValueRef dady = LLVMBuildFSub(b, da20_dx01_ooa, da01_dx20_ooa, "dady"); 381 382 /* Calculate a0 - the attribute value at the origin 383 */ 384 LLVMValueRef dadx_x0 = LLVMBuildFMul(b, dadx, x0_center, "dadx_x0"); 385 LLVMValueRef dady_y0 = LLVMBuildFMul(b, dady, y0_center, "dady_y0"); 386 LLVMValueRef attr_v0 = LLVMBuildFAdd(b, dadx_x0, dady_y0, "attr_v0"); 387 LLVMValueRef attr_0 = LLVMBuildFSub(b, a0, attr_v0, "attr_0"); 388 389 store_coef(gallivm, args, slot, attr_0, dadx, dady); 390 } 391 392 393 static void 394 emit_linear_coef( struct gallivm_state *gallivm, 395 struct lp_setup_args *args, 396 unsigned slot, 397 LLVMValueRef attribv[3]) 398 { 399 /* nothing to do anymore */ 400 emit_coef4(gallivm, 401 args, slot, 402 attribv[0], 403 attribv[1], 404 attribv[2]); 405 } 406 407 408 /** 409 * Compute a0, dadx and dady for a perspective-corrected interpolant, 410 * for a triangle. 411 * We basically multiply the vertex value by 1/w before computing 412 * the plane coefficients (a0, dadx, dady). 413 * Later, when we compute the value at a particular fragment position we'll 414 * divide the interpolated value by the interpolated W at that fragment. 415 */ 416 static void 417 apply_perspective_corr( struct gallivm_state *gallivm, 418 struct lp_setup_args *args, 419 unsigned slot, 420 LLVMValueRef attribv[3]) 421 { 422 LLVMBuilderRef b = gallivm->builder; 423 424 /* premultiply by 1/w (v[0][3] is always 1/w): 425 */ 426 LLVMValueRef v0_oow = vec4f_from_scalar(gallivm, vert_attrib(gallivm, args->v0, 0, 3, ""), "v0_oow"); 427 LLVMValueRef v1_oow = vec4f_from_scalar(gallivm, vert_attrib(gallivm, args->v1, 0, 3, ""), "v1_oow"); 428 LLVMValueRef v2_oow = vec4f_from_scalar(gallivm, vert_attrib(gallivm, args->v2, 0, 3, ""), "v2_oow"); 429 430 attribv[0] = LLVMBuildFMul(b, attribv[0], v0_oow, "v0_oow_v0a"); 431 attribv[1] = LLVMBuildFMul(b, attribv[1], v1_oow, "v1_oow_v1a"); 432 attribv[2] = LLVMBuildFMul(b, attribv[2], v2_oow, "v2_oow_v2a"); 433 } 434 435 436 static void 437 emit_position_coef( struct gallivm_state *gallivm, 438 struct lp_setup_args *args, 439 int slot, 440 LLVMValueRef attribv[3]) 441 { 442 emit_linear_coef(gallivm, args, slot, attribv); 443 } 444 445 446 /** 447 * Applys cylindrical wrapping to vertex attributes if enabled. 448 * Input coordinates must be in [0, 1] range, otherwise results are undefined. 449 * 450 * @param cyl_wrap TGSI_CYLINDRICAL_WRAP_x flags 451 */ 452 static void 453 emit_apply_cyl_wrap(struct gallivm_state *gallivm, 454 struct lp_setup_args *args, 455 uint cyl_wrap, 456 LLVMValueRef attribv[3]) 457 458 { 459 LLVMBuilderRef builder = gallivm->builder; 460 struct lp_type type = lp_float32_vec4_type(); 461 LLVMTypeRef float_vec_type = lp_build_vec_type(gallivm, type); 462 LLVMValueRef pos_half; 463 LLVMValueRef neg_half; 464 LLVMValueRef cyl_mask; 465 LLVMValueRef offset; 466 LLVMValueRef delta; 467 LLVMValueRef one; 468 469 if (!cyl_wrap) 470 return; 471 472 /* Constants */ 473 pos_half = lp_build_const_vec(gallivm, type, +0.5f); 474 neg_half = lp_build_const_vec(gallivm, type, -0.5f); 475 cyl_mask = lp_build_const_mask_aos(gallivm, type, cyl_wrap); 476 477 one = lp_build_const_vec(gallivm, type, 1.0f); 478 one = LLVMBuildBitCast(builder, one, lp_build_int_vec_type(gallivm, type), ""); 479 one = LLVMBuildAnd(builder, one, cyl_mask, ""); 480 481 /* Edge v0 -> v1 */ 482 delta = LLVMBuildFSub(builder, attribv[1], attribv[0], ""); 483 484 offset = lp_build_compare(gallivm, type, PIPE_FUNC_GREATER, delta, pos_half); 485 offset = LLVMBuildAnd(builder, offset, one, ""); 486 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 487 attribv[0] = LLVMBuildFAdd(builder, attribv[0], offset, ""); 488 489 offset = lp_build_compare(gallivm, type, PIPE_FUNC_LESS, delta, neg_half); 490 offset = LLVMBuildAnd(builder, offset, one, ""); 491 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 492 attribv[1] = LLVMBuildFAdd(builder, attribv[1], offset, ""); 493 494 /* Edge v1 -> v2 */ 495 delta = LLVMBuildFSub(builder, attribv[2], attribv[1], ""); 496 497 offset = lp_build_compare(gallivm, type, PIPE_FUNC_GREATER, delta, pos_half); 498 offset = LLVMBuildAnd(builder, offset, one, ""); 499 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 500 attribv[1] = LLVMBuildFAdd(builder, attribv[1], offset, ""); 501 502 offset = lp_build_compare(gallivm, type, PIPE_FUNC_LESS, delta, neg_half); 503 offset = LLVMBuildAnd(builder, offset, one, ""); 504 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 505 attribv[2] = LLVMBuildFAdd(builder, attribv[2], offset, ""); 506 507 /* Edge v2 -> v0 */ 508 delta = LLVMBuildFSub(builder, attribv[0], attribv[2], ""); 509 510 offset = lp_build_compare(gallivm, type, PIPE_FUNC_GREATER, delta, pos_half); 511 offset = LLVMBuildAnd(builder, offset, one, ""); 512 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 513 attribv[2] = LLVMBuildFAdd(builder, attribv[2], offset, ""); 514 515 offset = lp_build_compare(gallivm, type, PIPE_FUNC_LESS, delta, neg_half); 516 offset = LLVMBuildAnd(builder, offset, one, ""); 517 offset = LLVMBuildBitCast(builder, offset, float_vec_type, ""); 518 attribv[0] = LLVMBuildFAdd(builder, attribv[0], offset, ""); 519 } 520 521 522 /** 523 * Compute the inputs-> dadx, dady, a0 values. 524 */ 525 static void 526 emit_tri_coef( struct gallivm_state *gallivm, 527 const struct lp_setup_variant_key *key, 528 struct lp_setup_args *args) 529 { 530 unsigned slot; 531 532 LLVMValueRef attribs[3]; 533 534 /* setup interpolation for all the remaining attributes: 535 */ 536 for (slot = 0; slot < key->num_inputs; slot++) { 537 switch (key->inputs[slot].interp) { 538 case LP_INTERP_CONSTANT: 539 load_attribute(gallivm, args, key, key->inputs[slot].src_index, attribs); 540 if (key->flatshade_first) { 541 emit_constant_coef4(gallivm, args, slot+1, attribs[0]); 542 } 543 else { 544 emit_constant_coef4(gallivm, args, slot+1, attribs[2]); 545 } 546 break; 547 548 case LP_INTERP_LINEAR: 549 load_attribute(gallivm, args, key, key->inputs[slot].src_index, attribs); 550 emit_apply_cyl_wrap(gallivm, args, key->inputs[slot].cyl_wrap, attribs); 551 emit_linear_coef(gallivm, args, slot+1, attribs); 552 break; 553 554 case LP_INTERP_PERSPECTIVE: 555 load_attribute(gallivm, args, key, key->inputs[slot].src_index, attribs); 556 emit_apply_cyl_wrap(gallivm, args, key->inputs[slot].cyl_wrap, attribs); 557 apply_perspective_corr(gallivm, args, slot+1, attribs); 558 emit_linear_coef(gallivm, args, slot+1, attribs); 559 break; 560 561 case LP_INTERP_POSITION: 562 /* 563 * The generated pixel interpolators will pick up the coeffs from 564 * slot 0. 565 */ 566 break; 567 568 case LP_INTERP_FACING: 569 emit_facing_coef(gallivm, args, slot+1); 570 break; 571 572 default: 573 assert(0); 574 } 575 } 576 } 577 578 579 /* XXX: generic code: 580 */ 581 static void 582 set_noalias(LLVMBuilderRef builder, 583 LLVMValueRef function, 584 const LLVMTypeRef *arg_types, 585 int nr_args) 586 { 587 int i; 588 for(i = 0; i < nr_args; ++i) 589 if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind) 590 LLVMAddAttribute(LLVMGetParam(function, i), 591 LLVMNoAliasAttribute); 592 } 593 594 static void 595 init_args(struct gallivm_state *gallivm, 596 const struct lp_setup_variant_key *key, 597 struct lp_setup_args *args) 598 { 599 LLVMBuilderRef b = gallivm->builder; 600 LLVMTypeRef shuf_type = LLVMInt32TypeInContext(gallivm->context); 601 LLVMValueRef onef = lp_build_const_float(gallivm, 1.0); 602 LLVMValueRef onei = lp_build_const_int32(gallivm, 1); 603 LLVMValueRef zeroi = lp_build_const_int32(gallivm, 0); 604 LLVMValueRef pixel_center, xy0_center, dxy01, dxy20, dyx20; 605 LLVMValueRef e, f, ef, ooa; 606 LLVMValueRef shuffles[4]; 607 LLVMValueRef attr_pos[3]; 608 struct lp_type typef4 = lp_type_float_vec(32, 128); 609 610 /* The internal position input is in slot zero: 611 */ 612 load_attribute(gallivm, args, key, 0, attr_pos); 613 614 pixel_center = lp_build_const_vec(gallivm, typef4, 615 key->pixel_center_half ? 0.5 : 0.0); 616 617 /* 618 * xy are first two elems in v0a/v1a/v2a but just use vec4 arit 619 * also offset_tri uses actually xyz in them 620 */ 621 xy0_center = LLVMBuildFSub(b, attr_pos[0], pixel_center, "xy0_center" ); 622 623 dxy01 = LLVMBuildFSub(b, attr_pos[0], attr_pos[1], "dxy01"); 624 dxy20 = LLVMBuildFSub(b, attr_pos[2], attr_pos[0], "dxy20"); 625 626 shuffles[0] = onei; 627 shuffles[1] = zeroi; 628 shuffles[2] = LLVMGetUndef(shuf_type); 629 shuffles[3] = LLVMGetUndef(shuf_type); 630 631 dyx20 = LLVMBuildShuffleVector(b, dxy20, dxy20, LLVMConstVector(shuffles, 4), ""); 632 633 ef = LLVMBuildFMul(b, dxy01, dyx20, "ef"); 634 e = LLVMBuildExtractElement(b, ef, zeroi, ""); 635 f = LLVMBuildExtractElement(b, ef, onei, ""); 636 637 ooa = LLVMBuildFDiv(b, onef, LLVMBuildFSub(b, e, f, ""), "ooa"); 638 639 ooa = vec4f_from_scalar(gallivm, ooa, ""); 640 641 /* tri offset calc shares a lot of arithmetic, do it here */ 642 if (key->scale != 0.0f || key->units != 0.0f) { 643 lp_do_offset_tri(gallivm, args, key, ooa, dxy01, dxy20, attr_pos); 644 } 645 646 dxy20 = LLVMBuildFMul(b, dxy20, ooa, ""); 647 dxy01 = LLVMBuildFMul(b, dxy01, ooa, ""); 648 649 args->dy20_ooa = lp_build_extract_broadcast(gallivm, typef4, typef4, dxy20, onei); 650 args->dy01_ooa = lp_build_extract_broadcast(gallivm, typef4, typef4, dxy01, onei); 651 652 args->dx20_ooa = lp_build_extract_broadcast(gallivm, typef4, typef4, dxy20, zeroi); 653 args->dx01_ooa = lp_build_extract_broadcast(gallivm, typef4, typef4, dxy01, zeroi); 654 655 args->x0_center = lp_build_extract_broadcast(gallivm, typef4, typef4, xy0_center, zeroi); 656 args->y0_center = lp_build_extract_broadcast(gallivm, typef4, typef4, xy0_center, onei); 657 658 /* might want to merge that with other coef emit in the future */ 659 emit_position_coef(gallivm, args, 0, attr_pos); 660 } 661 662 /** 663 * Generate the runtime callable function for the coefficient calculation. 664 * 665 */ 666 static struct lp_setup_variant * 667 generate_setup_variant(struct lp_setup_variant_key *key, 668 struct llvmpipe_context *lp) 669 { 670 struct lp_setup_variant *variant = NULL; 671 struct gallivm_state *gallivm; 672 struct lp_setup_args args; 673 char func_name[256]; 674 LLVMTypeRef vec4f_type; 675 LLVMTypeRef func_type; 676 LLVMTypeRef arg_types[7]; 677 LLVMBasicBlockRef block; 678 LLVMBuilderRef builder; 679 int64_t t0 = 0, t1; 680 681 if (0) 682 goto fail; 683 684 variant = CALLOC_STRUCT(lp_setup_variant); 685 if (variant == NULL) 686 goto fail; 687 688 variant->gallivm = gallivm = gallivm_create(); 689 if (!variant->gallivm) { 690 goto fail; 691 } 692 693 builder = gallivm->builder; 694 695 if (LP_DEBUG & DEBUG_COUNTERS) { 696 t0 = os_time_get(); 697 } 698 699 memcpy(&variant->key, key, key->size); 700 variant->list_item_global.base = variant; 701 702 util_snprintf(func_name, sizeof(func_name), "fs%u_setup%u", 703 0, 704 variant->no); 705 706 /* Currently always deal with full 4-wide vertex attributes from 707 * the vertices. 708 */ 709 710 vec4f_type = LLVMVectorType(LLVMFloatTypeInContext(gallivm->context), 4); 711 712 arg_types[0] = LLVMPointerType(vec4f_type, 0); /* v0 */ 713 arg_types[1] = LLVMPointerType(vec4f_type, 0); /* v1 */ 714 arg_types[2] = LLVMPointerType(vec4f_type, 0); /* v2 */ 715 arg_types[3] = LLVMInt32TypeInContext(gallivm->context); /* facing */ 716 arg_types[4] = LLVMPointerType(vec4f_type, 0); /* a0, aligned */ 717 arg_types[5] = LLVMPointerType(vec4f_type, 0); /* dadx, aligned */ 718 arg_types[6] = LLVMPointerType(vec4f_type, 0); /* dady, aligned */ 719 720 func_type = LLVMFunctionType(LLVMVoidTypeInContext(gallivm->context), 721 arg_types, Elements(arg_types), 0); 722 723 variant->function = LLVMAddFunction(gallivm->module, func_name, func_type); 724 if (!variant->function) 725 goto fail; 726 727 LLVMSetFunctionCallConv(variant->function, LLVMCCallConv); 728 729 args.v0 = LLVMGetParam(variant->function, 0); 730 args.v1 = LLVMGetParam(variant->function, 1); 731 args.v2 = LLVMGetParam(variant->function, 2); 732 args.facing = LLVMGetParam(variant->function, 3); 733 args.a0 = LLVMGetParam(variant->function, 4); 734 args.dadx = LLVMGetParam(variant->function, 5); 735 args.dady = LLVMGetParam(variant->function, 6); 736 737 lp_build_name(args.v0, "in_v0"); 738 lp_build_name(args.v1, "in_v1"); 739 lp_build_name(args.v2, "in_v2"); 740 lp_build_name(args.facing, "in_facing"); 741 lp_build_name(args.a0, "out_a0"); 742 lp_build_name(args.dadx, "out_dadx"); 743 lp_build_name(args.dady, "out_dady"); 744 745 /* 746 * Function body 747 */ 748 block = LLVMAppendBasicBlockInContext(gallivm->context, 749 variant->function, "entry"); 750 LLVMPositionBuilderAtEnd(builder, block); 751 752 set_noalias(builder, variant->function, arg_types, Elements(arg_types)); 753 init_args(gallivm, &variant->key, &args); 754 emit_tri_coef(gallivm, &variant->key, &args); 755 756 LLVMBuildRetVoid(builder); 757 758 gallivm_verify_function(gallivm, variant->function); 759 760 gallivm_compile_module(gallivm); 761 762 variant->jit_function = (lp_jit_setup_triangle) 763 gallivm_jit_function(gallivm, variant->function); 764 if (!variant->jit_function) 765 goto fail; 766 767 /* 768 * Update timing information: 769 */ 770 if (LP_DEBUG & DEBUG_COUNTERS) { 771 t1 = os_time_get(); 772 LP_COUNT_ADD(llvm_compile_time, t1 - t0); 773 LP_COUNT_ADD(nr_llvm_compiles, 1); 774 } 775 776 return variant; 777 778 fail: 779 if (variant) { 780 if (variant->function) { 781 gallivm_free_function(gallivm, 782 variant->function, 783 variant->jit_function); 784 } 785 if (variant->gallivm) { 786 gallivm_destroy(variant->gallivm); 787 } 788 FREE(variant); 789 } 790 791 return NULL; 792 } 793 794 795 796 static void 797 lp_make_setup_variant_key(struct llvmpipe_context *lp, 798 struct lp_setup_variant_key *key) 799 { 800 struct lp_fragment_shader *fs = lp->fs; 801 unsigned i; 802 803 assert(sizeof key->inputs[0] == sizeof(uint)); 804 805 key->num_inputs = fs->info.base.num_inputs; 806 key->flatshade_first = lp->rasterizer->flatshade_first; 807 key->pixel_center_half = lp->rasterizer->gl_rasterization_rules; 808 key->twoside = lp->rasterizer->light_twoside; 809 key->size = Offset(struct lp_setup_variant_key, 810 inputs[key->num_inputs]); 811 812 key->color_slot = lp->color_slot [0]; 813 key->bcolor_slot = lp->bcolor_slot[0]; 814 key->spec_slot = lp->color_slot [1]; 815 key->bspec_slot = lp->bcolor_slot[1]; 816 assert(key->color_slot == lp->color_slot [0]); 817 assert(key->bcolor_slot == lp->bcolor_slot[0]); 818 assert(key->spec_slot == lp->color_slot [1]); 819 assert(key->bspec_slot == lp->bcolor_slot[1]); 820 821 key->units = (float) (lp->rasterizer->offset_units * lp->mrd); 822 key->scale = lp->rasterizer->offset_scale; 823 key->pad = 0; 824 memcpy(key->inputs, fs->inputs, key->num_inputs * sizeof key->inputs[0]); 825 for (i = 0; i < key->num_inputs; i++) { 826 if (key->inputs[i].interp == LP_INTERP_COLOR) { 827 if (lp->rasterizer->flatshade) 828 key->inputs[i].interp = LP_INTERP_CONSTANT; 829 else 830 key->inputs[i].interp = LP_INTERP_PERSPECTIVE; 831 } 832 } 833 834 } 835 836 837 static void 838 remove_setup_variant(struct llvmpipe_context *lp, 839 struct lp_setup_variant *variant) 840 { 841 if (gallivm_debug & GALLIVM_DEBUG_IR) { 842 debug_printf("llvmpipe: del setup_variant #%u total %u\n", 843 variant->no, lp->nr_setup_variants); 844 } 845 846 if (variant->function) { 847 gallivm_free_function(variant->gallivm, 848 variant->function, 849 variant->jit_function); 850 } 851 852 if (variant->gallivm) { 853 gallivm_destroy(variant->gallivm); 854 } 855 856 remove_from_list(&variant->list_item_global); 857 lp->nr_setup_variants--; 858 FREE(variant); 859 } 860 861 862 863 /* When the number of setup variants exceeds a threshold, cull a 864 * fraction (currently a quarter) of them. 865 */ 866 static void 867 cull_setup_variants(struct llvmpipe_context *lp) 868 { 869 struct pipe_context *pipe = &lp->pipe; 870 int i; 871 872 /* 873 * XXX: we need to flush the context until we have some sort of reference 874 * counting in fragment shaders as they may still be binned 875 * Flushing alone might not be sufficient we need to wait on it too. 876 */ 877 llvmpipe_finish(pipe, __FUNCTION__); 878 879 for (i = 0; i < LP_MAX_SETUP_VARIANTS / 4; i++) { 880 struct lp_setup_variant_list_item *item; 881 if (is_empty_list(&lp->setup_variants_list)) { 882 break; 883 } 884 item = last_elem(&lp->setup_variants_list); 885 assert(item); 886 assert(item->base); 887 remove_setup_variant(lp, item->base); 888 } 889 } 890 891 892 /** 893 * Update fragment/vertex shader linkage state. This is called just 894 * prior to drawing something when some fragment-related state has 895 * changed. 896 */ 897 void 898 llvmpipe_update_setup(struct llvmpipe_context *lp) 899 { 900 struct lp_setup_variant_key *key = &lp->setup_variant.key; 901 struct lp_setup_variant *variant = NULL; 902 struct lp_setup_variant_list_item *li; 903 904 lp_make_setup_variant_key(lp, key); 905 906 foreach(li, &lp->setup_variants_list) { 907 if(li->base->key.size == key->size && 908 memcmp(&li->base->key, key, key->size) == 0) { 909 variant = li->base; 910 break; 911 } 912 } 913 914 if (variant) { 915 move_to_head(&lp->setup_variants_list, &variant->list_item_global); 916 } 917 else { 918 if (lp->nr_setup_variants >= LP_MAX_SETUP_VARIANTS) { 919 cull_setup_variants(lp); 920 } 921 922 variant = generate_setup_variant(key, lp); 923 if (variant) { 924 insert_at_head(&lp->setup_variants_list, &variant->list_item_global); 925 lp->nr_setup_variants++; 926 llvmpipe_variant_count++; 927 } 928 } 929 930 lp_setup_set_setup_variant(lp->setup, 931 variant); 932 } 933 934 void 935 lp_delete_setup_variants(struct llvmpipe_context *lp) 936 { 937 struct lp_setup_variant_list_item *li; 938 li = first_elem(&lp->setup_variants_list); 939 while(!at_end(&lp->setup_variants_list, li)) { 940 struct lp_setup_variant_list_item *next = next_elem(li); 941 remove_setup_variant(lp, li->base); 942 li = next; 943 } 944 } 945 946 void 947 lp_dump_setup_coef( const struct lp_setup_variant_key *key, 948 const float (*sa0)[4], 949 const float (*sdadx)[4], 950 const float (*sdady)[4]) 951 { 952 int i, slot; 953 954 for (i = 0; i < TGSI_NUM_CHANNELS; i++) { 955 float a0 = sa0 [0][i]; 956 float dadx = sdadx[0][i]; 957 float dady = sdady[0][i]; 958 959 debug_printf("POS.%c: a0 = %f, dadx = %f, dady = %f\n", 960 "xyzw"[i], 961 a0, dadx, dady); 962 } 963 964 for (slot = 0; slot < key->num_inputs; slot++) { 965 unsigned usage_mask = key->inputs[slot].usage_mask; 966 for (i = 0; i < TGSI_NUM_CHANNELS; i++) { 967 if (usage_mask & (1 << i)) { 968 float a0 = sa0 [1 + slot][i]; 969 float dadx = sdadx[1 + slot][i]; 970 float dady = sdady[1 + slot][i]; 971 972 debug_printf("IN[%u].%c: a0 = %f, dadx = %f, dady = %f\n", 973 slot, 974 "xyzw"[i], 975 a0, dadx, dady); 976 } 977 } 978 } 979 } 980
