1 /* 2 Copyright (C) Intel Corp. 2006. All Rights Reserved. 3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to 4 develop this 3D driver. 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a 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, sublicense, 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 16 portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 26 **********************************************************************/ 27 /* 28 * Authors: 29 * Keith Whitwell <keith (at) tungstengraphics.com> 30 */ 31 32 33 #include "main/glheader.h" 34 #include "main/macros.h" 35 #include "main/enums.h" 36 37 #include "intel_batchbuffer.h" 38 39 #include "brw_defines.h" 40 #include "brw_context.h" 41 #include "brw_eu.h" 42 #include "brw_util.h" 43 #include "brw_sf.h" 44 45 46 /** 47 * Determine the vert_result corresponding to the given half of the given 48 * register. half=0 means the first half of a register, half=1 means the 49 * second half. 50 */ 51 static inline int vert_reg_to_vert_result(struct brw_sf_compile *c, GLuint reg, 52 int half) 53 { 54 int vue_slot = (reg + c->urb_entry_read_offset) * 2 + half; 55 return c->vue_map.slot_to_vert_result[vue_slot]; 56 } 57 58 /** 59 * Determine the register corresponding to the given vert_result. 60 */ 61 static struct brw_reg get_vert_result(struct brw_sf_compile *c, 62 struct brw_reg vert, 63 GLuint vert_result) 64 { 65 int vue_slot = c->vue_map.vert_result_to_slot[vert_result]; 66 assert (vue_slot >= c->urb_entry_read_offset); 67 GLuint off = vue_slot / 2 - c->urb_entry_read_offset; 68 GLuint sub = vue_slot % 2; 69 70 return brw_vec4_grf(vert.nr + off, sub * 4); 71 } 72 73 static bool 74 have_attr(struct brw_sf_compile *c, GLuint attr) 75 { 76 return (c->key.attrs & BITFIELD64_BIT(attr)) ? 1 : 0; 77 } 78 79 /*********************************************************************** 80 * Twoside lighting 81 */ 82 static void copy_bfc( struct brw_sf_compile *c, 83 struct brw_reg vert ) 84 { 85 struct brw_compile *p = &c->func; 86 GLuint i; 87 88 for (i = 0; i < 2; i++) { 89 if (have_attr(c, VERT_RESULT_COL0+i) && 90 have_attr(c, VERT_RESULT_BFC0+i)) 91 brw_MOV(p, 92 get_vert_result(c, vert, VERT_RESULT_COL0+i), 93 get_vert_result(c, vert, VERT_RESULT_BFC0+i)); 94 } 95 } 96 97 98 static void do_twoside_color( struct brw_sf_compile *c ) 99 { 100 struct brw_compile *p = &c->func; 101 GLuint backface_conditional = c->key.frontface_ccw ? BRW_CONDITIONAL_G : BRW_CONDITIONAL_L; 102 103 /* Already done in clip program: 104 */ 105 if (c->key.primitive == SF_UNFILLED_TRIS) 106 return; 107 108 /* XXX: What happens if BFC isn't present? This could only happen 109 * for user-supplied vertex programs, as t_vp_build.c always does 110 * the right thing. 111 */ 112 if (!(have_attr(c, VERT_RESULT_COL0) && have_attr(c, VERT_RESULT_BFC0)) && 113 !(have_attr(c, VERT_RESULT_COL1) && have_attr(c, VERT_RESULT_BFC1))) 114 return; 115 116 /* Need to use BRW_EXECUTE_4 and also do an 4-wide compare in order 117 * to get all channels active inside the IF. In the clipping code 118 * we run with NoMask, so it's not an option and we can use 119 * BRW_EXECUTE_1 for all comparisions. 120 */ 121 brw_push_insn_state(p); 122 brw_CMP(p, vec4(brw_null_reg()), backface_conditional, c->det, brw_imm_f(0)); 123 brw_IF(p, BRW_EXECUTE_4); 124 { 125 switch (c->nr_verts) { 126 case 3: copy_bfc(c, c->vert[2]); 127 case 2: copy_bfc(c, c->vert[1]); 128 case 1: copy_bfc(c, c->vert[0]); 129 } 130 } 131 brw_ENDIF(p); 132 brw_pop_insn_state(p); 133 } 134 135 136 137 /*********************************************************************** 138 * Flat shading 139 */ 140 141 #define VERT_RESULT_COLOR_BITS (BITFIELD64_BIT(VERT_RESULT_COL0) | \ 142 BITFIELD64_BIT(VERT_RESULT_COL1)) 143 144 static void copy_colors( struct brw_sf_compile *c, 145 struct brw_reg dst, 146 struct brw_reg src) 147 { 148 struct brw_compile *p = &c->func; 149 GLuint i; 150 151 for (i = VERT_RESULT_COL0; i <= VERT_RESULT_COL1; i++) { 152 if (have_attr(c,i)) 153 brw_MOV(p, 154 get_vert_result(c, dst, i), 155 get_vert_result(c, src, i)); 156 } 157 } 158 159 160 161 /* Need to use a computed jump to copy flatshaded attributes as the 162 * vertices are ordered according to y-coordinate before reaching this 163 * point, so the PV could be anywhere. 164 */ 165 static void do_flatshade_triangle( struct brw_sf_compile *c ) 166 { 167 struct brw_compile *p = &c->func; 168 struct intel_context *intel = &p->brw->intel; 169 struct brw_reg ip = brw_ip_reg(); 170 GLuint nr = _mesa_bitcount_64(c->key.attrs & VERT_RESULT_COLOR_BITS); 171 GLuint jmpi = 1; 172 173 if (!nr) 174 return; 175 176 /* Already done in clip program: 177 */ 178 if (c->key.primitive == SF_UNFILLED_TRIS) 179 return; 180 181 if (intel->gen == 5) 182 jmpi = 2; 183 184 brw_push_insn_state(p); 185 186 brw_MUL(p, c->pv, c->pv, brw_imm_d(jmpi*(nr*2+1))); 187 brw_JMPI(p, ip, ip, c->pv); 188 189 copy_colors(c, c->vert[1], c->vert[0]); 190 copy_colors(c, c->vert[2], c->vert[0]); 191 brw_JMPI(p, ip, ip, brw_imm_d(jmpi*(nr*4+1))); 192 193 copy_colors(c, c->vert[0], c->vert[1]); 194 copy_colors(c, c->vert[2], c->vert[1]); 195 brw_JMPI(p, ip, ip, brw_imm_d(jmpi*nr*2)); 196 197 copy_colors(c, c->vert[0], c->vert[2]); 198 copy_colors(c, c->vert[1], c->vert[2]); 199 200 brw_pop_insn_state(p); 201 } 202 203 204 static void do_flatshade_line( struct brw_sf_compile *c ) 205 { 206 struct brw_compile *p = &c->func; 207 struct intel_context *intel = &p->brw->intel; 208 struct brw_reg ip = brw_ip_reg(); 209 GLuint nr = _mesa_bitcount_64(c->key.attrs & VERT_RESULT_COLOR_BITS); 210 GLuint jmpi = 1; 211 212 if (!nr) 213 return; 214 215 /* Already done in clip program: 216 */ 217 if (c->key.primitive == SF_UNFILLED_TRIS) 218 return; 219 220 if (intel->gen == 5) 221 jmpi = 2; 222 223 brw_push_insn_state(p); 224 225 brw_MUL(p, c->pv, c->pv, brw_imm_d(jmpi*(nr+1))); 226 brw_JMPI(p, ip, ip, c->pv); 227 copy_colors(c, c->vert[1], c->vert[0]); 228 229 brw_JMPI(p, ip, ip, brw_imm_ud(jmpi*nr)); 230 copy_colors(c, c->vert[0], c->vert[1]); 231 232 brw_pop_insn_state(p); 233 } 234 235 236 237 /*********************************************************************** 238 * Triangle setup. 239 */ 240 241 242 static void alloc_regs( struct brw_sf_compile *c ) 243 { 244 GLuint reg, i; 245 246 /* Values computed by fixed function unit: 247 */ 248 c->pv = retype(brw_vec1_grf(1, 1), BRW_REGISTER_TYPE_D); 249 c->det = brw_vec1_grf(1, 2); 250 c->dx0 = brw_vec1_grf(1, 3); 251 c->dx2 = brw_vec1_grf(1, 4); 252 c->dy0 = brw_vec1_grf(1, 5); 253 c->dy2 = brw_vec1_grf(1, 6); 254 255 /* z and 1/w passed in seperately: 256 */ 257 c->z[0] = brw_vec1_grf(2, 0); 258 c->inv_w[0] = brw_vec1_grf(2, 1); 259 c->z[1] = brw_vec1_grf(2, 2); 260 c->inv_w[1] = brw_vec1_grf(2, 3); 261 c->z[2] = brw_vec1_grf(2, 4); 262 c->inv_w[2] = brw_vec1_grf(2, 5); 263 264 /* The vertices: 265 */ 266 reg = 3; 267 for (i = 0; i < c->nr_verts; i++) { 268 c->vert[i] = brw_vec8_grf(reg, 0); 269 reg += c->nr_attr_regs; 270 } 271 272 /* Temporaries, allocated after last vertex reg. 273 */ 274 c->inv_det = brw_vec1_grf(reg, 0); reg++; 275 c->a1_sub_a0 = brw_vec8_grf(reg, 0); reg++; 276 c->a2_sub_a0 = brw_vec8_grf(reg, 0); reg++; 277 c->tmp = brw_vec8_grf(reg, 0); reg++; 278 279 /* Note grf allocation: 280 */ 281 c->prog_data.total_grf = reg; 282 283 284 /* Outputs of this program - interpolation coefficients for 285 * rasterization: 286 */ 287 c->m1Cx = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 1, 0); 288 c->m2Cy = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 2, 0); 289 c->m3C0 = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 3, 0); 290 } 291 292 293 static void copy_z_inv_w( struct brw_sf_compile *c ) 294 { 295 struct brw_compile *p = &c->func; 296 GLuint i; 297 298 brw_push_insn_state(p); 299 300 /* Copy both scalars with a single MOV: 301 */ 302 for (i = 0; i < c->nr_verts; i++) 303 brw_MOV(p, vec2(suboffset(c->vert[i], 2)), vec2(c->z[i])); 304 305 brw_pop_insn_state(p); 306 } 307 308 309 static void invert_det( struct brw_sf_compile *c) 310 { 311 /* Looks like we invert all 8 elements just to get 1/det in 312 * position 2 !?! 313 */ 314 brw_math(&c->func, 315 c->inv_det, 316 BRW_MATH_FUNCTION_INV, 317 0, 318 c->det, 319 BRW_MATH_DATA_SCALAR, 320 BRW_MATH_PRECISION_FULL); 321 322 } 323 324 325 static bool 326 calculate_masks(struct brw_sf_compile *c, 327 GLuint reg, 328 GLushort *pc, 329 GLushort *pc_persp, 330 GLushort *pc_linear) 331 { 332 bool is_last_attr = (reg == c->nr_setup_regs - 1); 333 GLbitfield64 persp_mask; 334 GLbitfield64 linear_mask; 335 336 if (c->key.do_flat_shading) 337 persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS) | 338 BITFIELD64_BIT(VERT_RESULT_COL0) | 339 BITFIELD64_BIT(VERT_RESULT_COL1)); 340 else 341 persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS)); 342 343 if (c->key.do_flat_shading) 344 linear_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_COL0) | 345 BITFIELD64_BIT(VERT_RESULT_COL1)); 346 else 347 linear_mask = c->key.attrs; 348 349 *pc_persp = 0; 350 *pc_linear = 0; 351 *pc = 0xf; 352 353 if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0))) 354 *pc_persp = 0xf; 355 356 if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0))) 357 *pc_linear = 0xf; 358 359 /* Maybe only processs one attribute on the final round: 360 */ 361 if (vert_reg_to_vert_result(c, reg, 1) != BRW_VERT_RESULT_MAX) { 362 *pc |= 0xf0; 363 364 if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1))) 365 *pc_persp |= 0xf0; 366 367 if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1))) 368 *pc_linear |= 0xf0; 369 } 370 371 return is_last_attr; 372 } 373 374 /* Calculates the predicate control for which channels of a reg 375 * (containing 2 attrs) to do point sprite coordinate replacement on. 376 */ 377 static uint16_t 378 calculate_point_sprite_mask(struct brw_sf_compile *c, GLuint reg) 379 { 380 int vert_result1, vert_result2; 381 uint16_t pc = 0; 382 383 vert_result1 = vert_reg_to_vert_result(c, reg, 0); 384 if (vert_result1 >= VERT_RESULT_TEX0 && vert_result1 <= VERT_RESULT_TEX7) { 385 if (c->key.point_sprite_coord_replace & (1 << (vert_result1 - VERT_RESULT_TEX0))) 386 pc |= 0x0f; 387 } 388 if (vert_result1 == BRW_VERT_RESULT_PNTC) 389 pc |= 0x0f; 390 391 vert_result2 = vert_reg_to_vert_result(c, reg, 1); 392 if (vert_result2 >= VERT_RESULT_TEX0 && vert_result2 <= VERT_RESULT_TEX7) { 393 if (c->key.point_sprite_coord_replace & (1 << (vert_result2 - 394 VERT_RESULT_TEX0))) 395 pc |= 0xf0; 396 } 397 if (vert_result2 == BRW_VERT_RESULT_PNTC) 398 pc |= 0xf0; 399 400 return pc; 401 } 402 403 404 405 void brw_emit_tri_setup(struct brw_sf_compile *c, bool allocate) 406 { 407 struct brw_compile *p = &c->func; 408 GLuint i; 409 410 c->nr_verts = 3; 411 412 if (allocate) 413 alloc_regs(c); 414 415 invert_det(c); 416 copy_z_inv_w(c); 417 418 if (c->key.do_twoside_color) 419 do_twoside_color(c); 420 421 if (c->key.do_flat_shading) 422 do_flatshade_triangle(c); 423 424 425 for (i = 0; i < c->nr_setup_regs; i++) 426 { 427 /* Pair of incoming attributes: 428 */ 429 struct brw_reg a0 = offset(c->vert[0], i); 430 struct brw_reg a1 = offset(c->vert[1], i); 431 struct brw_reg a2 = offset(c->vert[2], i); 432 GLushort pc, pc_persp, pc_linear; 433 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear); 434 435 if (pc_persp) 436 { 437 brw_set_predicate_control_flag_value(p, pc_persp); 438 brw_MUL(p, a0, a0, c->inv_w[0]); 439 brw_MUL(p, a1, a1, c->inv_w[1]); 440 brw_MUL(p, a2, a2, c->inv_w[2]); 441 } 442 443 444 /* Calculate coefficients for interpolated values: 445 */ 446 if (pc_linear) 447 { 448 brw_set_predicate_control_flag_value(p, pc_linear); 449 450 brw_ADD(p, c->a1_sub_a0, a1, negate(a0)); 451 brw_ADD(p, c->a2_sub_a0, a2, negate(a0)); 452 453 /* calculate dA/dx 454 */ 455 brw_MUL(p, brw_null_reg(), c->a1_sub_a0, c->dy2); 456 brw_MAC(p, c->tmp, c->a2_sub_a0, negate(c->dy0)); 457 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det); 458 459 /* calculate dA/dy 460 */ 461 brw_MUL(p, brw_null_reg(), c->a2_sub_a0, c->dx0); 462 brw_MAC(p, c->tmp, c->a1_sub_a0, negate(c->dx2)); 463 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det); 464 } 465 466 { 467 brw_set_predicate_control_flag_value(p, pc); 468 /* start point for interpolation 469 */ 470 brw_MOV(p, c->m3C0, a0); 471 472 /* Copy m0..m3 to URB. m0 is implicitly copied from r0 in 473 * the send instruction: 474 */ 475 brw_urb_WRITE(p, 476 brw_null_reg(), 477 0, 478 brw_vec8_grf(0, 0), /* r0, will be copied to m0 */ 479 0, /* allocate */ 480 1, /* used */ 481 4, /* msg len */ 482 0, /* response len */ 483 last, /* eot */ 484 last, /* writes complete */ 485 i*4, /* offset */ 486 BRW_URB_SWIZZLE_TRANSPOSE); /* XXX: Swizzle control "SF to windower" */ 487 } 488 } 489 } 490 491 492 493 void brw_emit_line_setup(struct brw_sf_compile *c, bool allocate) 494 { 495 struct brw_compile *p = &c->func; 496 GLuint i; 497 498 499 c->nr_verts = 2; 500 501 if (allocate) 502 alloc_regs(c); 503 504 invert_det(c); 505 copy_z_inv_w(c); 506 507 if (c->key.do_flat_shading) 508 do_flatshade_line(c); 509 510 for (i = 0; i < c->nr_setup_regs; i++) 511 { 512 /* Pair of incoming attributes: 513 */ 514 struct brw_reg a0 = offset(c->vert[0], i); 515 struct brw_reg a1 = offset(c->vert[1], i); 516 GLushort pc, pc_persp, pc_linear; 517 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear); 518 519 if (pc_persp) 520 { 521 brw_set_predicate_control_flag_value(p, pc_persp); 522 brw_MUL(p, a0, a0, c->inv_w[0]); 523 brw_MUL(p, a1, a1, c->inv_w[1]); 524 } 525 526 /* Calculate coefficients for position, color: 527 */ 528 if (pc_linear) { 529 brw_set_predicate_control_flag_value(p, pc_linear); 530 531 brw_ADD(p, c->a1_sub_a0, a1, negate(a0)); 532 533 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dx0); 534 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det); 535 536 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dy0); 537 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det); 538 } 539 540 { 541 brw_set_predicate_control_flag_value(p, pc); 542 543 /* start point for interpolation 544 */ 545 brw_MOV(p, c->m3C0, a0); 546 547 /* Copy m0..m3 to URB. 548 */ 549 brw_urb_WRITE(p, 550 brw_null_reg(), 551 0, 552 brw_vec8_grf(0, 0), 553 0, /* allocate */ 554 1, /* used */ 555 4, /* msg len */ 556 0, /* response len */ 557 last, /* eot */ 558 last, /* writes complete */ 559 i*4, /* urb destination offset */ 560 BRW_URB_SWIZZLE_TRANSPOSE); 561 } 562 } 563 } 564 565 void brw_emit_point_sprite_setup(struct brw_sf_compile *c, bool allocate) 566 { 567 struct brw_compile *p = &c->func; 568 GLuint i; 569 570 c->nr_verts = 1; 571 572 if (allocate) 573 alloc_regs(c); 574 575 copy_z_inv_w(c); 576 for (i = 0; i < c->nr_setup_regs; i++) 577 { 578 struct brw_reg a0 = offset(c->vert[0], i); 579 GLushort pc, pc_persp, pc_linear, pc_coord_replace; 580 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear); 581 582 pc_coord_replace = calculate_point_sprite_mask(c, i); 583 pc_persp &= ~pc_coord_replace; 584 585 if (pc_persp) { 586 brw_set_predicate_control_flag_value(p, pc_persp); 587 brw_MUL(p, a0, a0, c->inv_w[0]); 588 } 589 590 /* Point sprite coordinate replacement: A texcoord with this 591 * enabled gets replaced with the value (x, y, 0, 1) where x and 592 * y vary from 0 to 1 across the horizontal and vertical of the 593 * point. 594 */ 595 if (pc_coord_replace) { 596 brw_set_predicate_control_flag_value(p, pc_coord_replace); 597 /* Caculate 1.0/PointWidth */ 598 brw_math(&c->func, 599 c->tmp, 600 BRW_MATH_FUNCTION_INV, 601 0, 602 c->dx0, 603 BRW_MATH_DATA_SCALAR, 604 BRW_MATH_PRECISION_FULL); 605 606 brw_set_access_mode(p, BRW_ALIGN_16); 607 608 /* dA/dx, dA/dy */ 609 brw_MOV(p, c->m1Cx, brw_imm_f(0.0)); 610 brw_MOV(p, c->m2Cy, brw_imm_f(0.0)); 611 brw_MOV(p, brw_writemask(c->m1Cx, WRITEMASK_X), c->tmp); 612 if (c->key.sprite_origin_lower_left) { 613 brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), negate(c->tmp)); 614 } else { 615 brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), c->tmp); 616 } 617 618 /* attribute constant offset */ 619 brw_MOV(p, c->m3C0, brw_imm_f(0.0)); 620 if (c->key.sprite_origin_lower_left) { 621 brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_YW), brw_imm_f(1.0)); 622 } else { 623 brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_W), brw_imm_f(1.0)); 624 } 625 626 brw_set_access_mode(p, BRW_ALIGN_1); 627 } 628 629 if (pc & ~pc_coord_replace) { 630 brw_set_predicate_control_flag_value(p, pc & ~pc_coord_replace); 631 brw_MOV(p, c->m1Cx, brw_imm_ud(0)); 632 brw_MOV(p, c->m2Cy, brw_imm_ud(0)); 633 brw_MOV(p, c->m3C0, a0); /* constant value */ 634 } 635 636 637 brw_set_predicate_control_flag_value(p, pc); 638 /* Copy m0..m3 to URB. */ 639 brw_urb_WRITE(p, 640 brw_null_reg(), 641 0, 642 brw_vec8_grf(0, 0), 643 0, /* allocate */ 644 1, /* used */ 645 4, /* msg len */ 646 0, /* response len */ 647 last, /* eot */ 648 last, /* writes complete */ 649 i*4, /* urb destination offset */ 650 BRW_URB_SWIZZLE_TRANSPOSE); 651 } 652 } 653 654 /* Points setup - several simplifications as all attributes are 655 * constant across the face of the point (point sprites excluded!) 656 */ 657 void brw_emit_point_setup(struct brw_sf_compile *c, bool allocate) 658 { 659 struct brw_compile *p = &c->func; 660 GLuint i; 661 662 c->nr_verts = 1; 663 664 if (allocate) 665 alloc_regs(c); 666 667 copy_z_inv_w(c); 668 669 brw_MOV(p, c->m1Cx, brw_imm_ud(0)); /* zero - move out of loop */ 670 brw_MOV(p, c->m2Cy, brw_imm_ud(0)); /* zero - move out of loop */ 671 672 for (i = 0; i < c->nr_setup_regs; i++) 673 { 674 struct brw_reg a0 = offset(c->vert[0], i); 675 GLushort pc, pc_persp, pc_linear; 676 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear); 677 678 if (pc_persp) 679 { 680 /* This seems odd as the values are all constant, but the 681 * fragment shader will be expecting it: 682 */ 683 brw_set_predicate_control_flag_value(p, pc_persp); 684 brw_MUL(p, a0, a0, c->inv_w[0]); 685 } 686 687 688 /* The delta values are always zero, just send the starting 689 * coordinate. Again, this is to fit in with the interpolation 690 * code in the fragment shader. 691 */ 692 { 693 brw_set_predicate_control_flag_value(p, pc); 694 695 brw_MOV(p, c->m3C0, a0); /* constant value */ 696 697 /* Copy m0..m3 to URB. 698 */ 699 brw_urb_WRITE(p, 700 brw_null_reg(), 701 0, 702 brw_vec8_grf(0, 0), 703 0, /* allocate */ 704 1, /* used */ 705 4, /* msg len */ 706 0, /* response len */ 707 last, /* eot */ 708 last, /* writes complete */ 709 i*4, /* urb destination offset */ 710 BRW_URB_SWIZZLE_TRANSPOSE); 711 } 712 } 713 } 714 715 void brw_emit_anyprim_setup( struct brw_sf_compile *c ) 716 { 717 struct brw_compile *p = &c->func; 718 struct brw_reg ip = brw_ip_reg(); 719 struct brw_reg payload_prim = brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0); 720 struct brw_reg payload_attr = get_element_ud(brw_vec1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0), 0); 721 struct brw_reg primmask; 722 int jmp; 723 struct brw_reg v1_null_ud = vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD)); 724 725 GLuint saveflag; 726 727 c->nr_verts = 3; 728 alloc_regs(c); 729 730 primmask = retype(get_element(c->tmp, 0), BRW_REGISTER_TYPE_UD); 731 732 brw_MOV(p, primmask, brw_imm_ud(1)); 733 brw_SHL(p, primmask, primmask, payload_prim); 734 735 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z); 736 brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_TRILIST) | 737 (1<<_3DPRIM_TRISTRIP) | 738 (1<<_3DPRIM_TRIFAN) | 739 (1<<_3DPRIM_TRISTRIP_REVERSE) | 740 (1<<_3DPRIM_POLYGON) | 741 (1<<_3DPRIM_RECTLIST) | 742 (1<<_3DPRIM_TRIFAN_NOSTIPPLE))); 743 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store; 744 { 745 saveflag = p->flag_value; 746 brw_push_insn_state(p); 747 brw_emit_tri_setup( c, false ); 748 brw_pop_insn_state(p); 749 p->flag_value = saveflag; 750 /* note - thread killed in subroutine, so must 751 * restore the flag which is changed when building 752 * the subroutine. fix #13240 753 */ 754 } 755 brw_land_fwd_jump(p, jmp); 756 757 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z); 758 brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_LINELIST) | 759 (1<<_3DPRIM_LINESTRIP) | 760 (1<<_3DPRIM_LINELOOP) | 761 (1<<_3DPRIM_LINESTRIP_CONT) | 762 (1<<_3DPRIM_LINESTRIP_BF) | 763 (1<<_3DPRIM_LINESTRIP_CONT_BF))); 764 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store; 765 { 766 saveflag = p->flag_value; 767 brw_push_insn_state(p); 768 brw_emit_line_setup( c, false ); 769 brw_pop_insn_state(p); 770 p->flag_value = saveflag; 771 /* note - thread killed in subroutine */ 772 } 773 brw_land_fwd_jump(p, jmp); 774 775 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z); 776 brw_AND(p, v1_null_ud, payload_attr, brw_imm_ud(1<<BRW_SPRITE_POINT_ENABLE)); 777 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store; 778 { 779 saveflag = p->flag_value; 780 brw_push_insn_state(p); 781 brw_emit_point_sprite_setup( c, false ); 782 brw_pop_insn_state(p); 783 p->flag_value = saveflag; 784 } 785 brw_land_fwd_jump(p, jmp); 786 787 brw_emit_point_setup( c, false ); 788 } 789 790 791 792 793
