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mesa: add/update comments in _mesa_copy_buffer_subdata()
[mesa.git] / src / mesa / drivers / dri / i965 / brw_sf_emit.c
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@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 BRW_MATH_SATURATE_NONE,
318 0,
319 c->det,
320 BRW_MATH_DATA_SCALAR,
321 BRW_MATH_PRECISION_FULL);
322
323 }
324
325
326 static bool
327 calculate_masks(struct brw_sf_compile *c,
328 GLuint reg,
329 GLushort *pc,
330 GLushort *pc_persp,
331 GLushort *pc_linear)
332 {
333 bool is_last_attr = (reg == c->nr_setup_regs - 1);
334 GLbitfield64 persp_mask;
335 GLbitfield64 linear_mask;
336
337 if (c->key.do_flat_shading)
338 persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS) |
339 BITFIELD64_BIT(VERT_RESULT_COL0) |
340 BITFIELD64_BIT(VERT_RESULT_COL1));
341 else
342 persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS));
343
344 if (c->key.do_flat_shading)
345 linear_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_COL0) |
346 BITFIELD64_BIT(VERT_RESULT_COL1));
347 else
348 linear_mask = c->key.attrs;
349
350 *pc_persp = 0;
351 *pc_linear = 0;
352 *pc = 0xf;
353
354 if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0)))
355 *pc_persp = 0xf;
356
357 if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0)))
358 *pc_linear = 0xf;
359
360 /* Maybe only processs one attribute on the final round:
361 */
362 if (vert_reg_to_vert_result(c, reg, 1) != BRW_VERT_RESULT_MAX) {
363 *pc |= 0xf0;
364
365 if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1)))
366 *pc_persp |= 0xf0;
367
368 if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1)))
369 *pc_linear |= 0xf0;
370 }
371
372 return is_last_attr;
373 }
374
375 /* Calculates the predicate control for which channels of a reg
376 * (containing 2 attrs) to do point sprite coordinate replacement on.
377 */
378 static uint16_t
379 calculate_point_sprite_mask(struct brw_sf_compile *c, GLuint reg)
380 {
381 int vert_result1, vert_result2;
382 uint16_t pc = 0;
383
384 vert_result1 = vert_reg_to_vert_result(c, reg, 0);
385 if (vert_result1 >= VERT_RESULT_TEX0 && vert_result1 <= VERT_RESULT_TEX7) {
386 if (c->key.point_sprite_coord_replace & (1 << (vert_result1 - VERT_RESULT_TEX0)))
387 pc |= 0x0f;
388 }
389
390 vert_result2 = vert_reg_to_vert_result(c, reg, 1);
391 if (vert_result2 >= VERT_RESULT_TEX0 && vert_result2 <= VERT_RESULT_TEX7) {
392 if (c->key.point_sprite_coord_replace & (1 << (vert_result2 -
393 VERT_RESULT_TEX0)))
394 pc |= 0xf0;
395 }
396
397 return pc;
398 }
399
400
401
402 void brw_emit_tri_setup(struct brw_sf_compile *c, bool allocate)
403 {
404 struct brw_compile *p = &c->func;
405 GLuint i;
406
407 c->nr_verts = 3;
408
409 if (allocate)
410 alloc_regs(c);
411
412 invert_det(c);
413 copy_z_inv_w(c);
414
415 if (c->key.do_twoside_color)
416 do_twoside_color(c);
417
418 if (c->key.do_flat_shading)
419 do_flatshade_triangle(c);
420
421
422 for (i = 0; i < c->nr_setup_regs; i++)
423 {
424 /* Pair of incoming attributes:
425 */
426 struct brw_reg a0 = offset(c->vert[0], i);
427 struct brw_reg a1 = offset(c->vert[1], i);
428 struct brw_reg a2 = offset(c->vert[2], i);
429 GLushort pc, pc_persp, pc_linear;
430 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
431
432 if (pc_persp)
433 {
434 brw_set_predicate_control_flag_value(p, pc_persp);
435 brw_MUL(p, a0, a0, c->inv_w[0]);
436 brw_MUL(p, a1, a1, c->inv_w[1]);
437 brw_MUL(p, a2, a2, c->inv_w[2]);
438 }
439
440
441 /* Calculate coefficients for interpolated values:
442 */
443 if (pc_linear)
444 {
445 brw_set_predicate_control_flag_value(p, pc_linear);
446
447 brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
448 brw_ADD(p, c->a2_sub_a0, a2, negate(a0));
449
450 /* calculate dA/dx
451 */
452 brw_MUL(p, brw_null_reg(), c->a1_sub_a0, c->dy2);
453 brw_MAC(p, c->tmp, c->a2_sub_a0, negate(c->dy0));
454 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
455
456 /* calculate dA/dy
457 */
458 brw_MUL(p, brw_null_reg(), c->a2_sub_a0, c->dx0);
459 brw_MAC(p, c->tmp, c->a1_sub_a0, negate(c->dx2));
460 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
461 }
462
463 {
464 brw_set_predicate_control_flag_value(p, pc);
465 /* start point for interpolation
466 */
467 brw_MOV(p, c->m3C0, a0);
468
469 /* Copy m0..m3 to URB. m0 is implicitly copied from r0 in
470 * the send instruction:
471 */
472 brw_urb_WRITE(p,
473 brw_null_reg(),
474 0,
475 brw_vec8_grf(0, 0), /* r0, will be copied to m0 */
476 0, /* allocate */
477 1, /* used */
478 4, /* msg len */
479 0, /* response len */
480 last, /* eot */
481 last, /* writes complete */
482 i*4, /* offset */
483 BRW_URB_SWIZZLE_TRANSPOSE); /* XXX: Swizzle control "SF to windower" */
484 }
485 }
486 }
487
488
489
490 void brw_emit_line_setup(struct brw_sf_compile *c, bool allocate)
491 {
492 struct brw_compile *p = &c->func;
493 GLuint i;
494
495
496 c->nr_verts = 2;
497
498 if (allocate)
499 alloc_regs(c);
500
501 invert_det(c);
502 copy_z_inv_w(c);
503
504 if (c->key.do_flat_shading)
505 do_flatshade_line(c);
506
507 for (i = 0; i < c->nr_setup_regs; i++)
508 {
509 /* Pair of incoming attributes:
510 */
511 struct brw_reg a0 = offset(c->vert[0], i);
512 struct brw_reg a1 = offset(c->vert[1], i);
513 GLushort pc, pc_persp, pc_linear;
514 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
515
516 if (pc_persp)
517 {
518 brw_set_predicate_control_flag_value(p, pc_persp);
519 brw_MUL(p, a0, a0, c->inv_w[0]);
520 brw_MUL(p, a1, a1, c->inv_w[1]);
521 }
522
523 /* Calculate coefficients for position, color:
524 */
525 if (pc_linear) {
526 brw_set_predicate_control_flag_value(p, pc_linear);
527
528 brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
529
530 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dx0);
531 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
532
533 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dy0);
534 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
535 }
536
537 {
538 brw_set_predicate_control_flag_value(p, pc);
539
540 /* start point for interpolation
541 */
542 brw_MOV(p, c->m3C0, a0);
543
544 /* Copy m0..m3 to URB.
545 */
546 brw_urb_WRITE(p,
547 brw_null_reg(),
548 0,
549 brw_vec8_grf(0, 0),
550 0, /* allocate */
551 1, /* used */
552 4, /* msg len */
553 0, /* response len */
554 last, /* eot */
555 last, /* writes complete */
556 i*4, /* urb destination offset */
557 BRW_URB_SWIZZLE_TRANSPOSE);
558 }
559 }
560 }
561
562 void brw_emit_point_sprite_setup(struct brw_sf_compile *c, bool allocate)
563 {
564 struct brw_compile *p = &c->func;
565 GLuint i;
566
567 c->nr_verts = 1;
568
569 if (allocate)
570 alloc_regs(c);
571
572 copy_z_inv_w(c);
573 for (i = 0; i < c->nr_setup_regs; i++)
574 {
575 struct brw_reg a0 = offset(c->vert[0], i);
576 GLushort pc, pc_persp, pc_linear, pc_coord_replace;
577 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
578
579 pc_coord_replace = calculate_point_sprite_mask(c, i);
580 pc_persp &= ~pc_coord_replace;
581
582 if (pc_persp) {
583 brw_set_predicate_control_flag_value(p, pc_persp);
584 brw_MUL(p, a0, a0, c->inv_w[0]);
585 }
586
587 /* Point sprite coordinate replacement: A texcoord with this
588 * enabled gets replaced with the value (x, y, 0, 1) where x and
589 * y vary from 0 to 1 across the horizontal and vertical of the
590 * point.
591 */
592 if (pc_coord_replace) {
593 brw_set_predicate_control_flag_value(p, pc_coord_replace);
594 /* Caculate 1.0/PointWidth */
595 brw_math(&c->func,
596 c->tmp,
597 BRW_MATH_FUNCTION_INV,
598 BRW_MATH_SATURATE_NONE,
599 0,
600 c->dx0,
601 BRW_MATH_DATA_SCALAR,
602 BRW_MATH_PRECISION_FULL);
603
604 brw_set_access_mode(p, BRW_ALIGN_16);
605
606 /* dA/dx, dA/dy */
607 brw_MOV(p, c->m1Cx, brw_imm_f(0.0));
608 brw_MOV(p, c->m2Cy, brw_imm_f(0.0));
609 brw_MOV(p, brw_writemask(c->m1Cx, WRITEMASK_X), c->tmp);
610 if (c->key.sprite_origin_lower_left) {
611 brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), negate(c->tmp));
612 } else {
613 brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), c->tmp);
614 }
615
616 /* attribute constant offset */
617 brw_MOV(p, c->m3C0, brw_imm_f(0.0));
618 if (c->key.sprite_origin_lower_left) {
619 brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_YW), brw_imm_f(1.0));
620 } else {
621 brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_W), brw_imm_f(1.0));
622 }
623
624 brw_set_access_mode(p, BRW_ALIGN_1);
625 }
626
627 if (pc & ~pc_coord_replace) {
628 brw_set_predicate_control_flag_value(p, pc & ~pc_coord_replace);
629 brw_MOV(p, c->m1Cx, brw_imm_ud(0));
630 brw_MOV(p, c->m2Cy, brw_imm_ud(0));
631 brw_MOV(p, c->m3C0, a0); /* constant value */
632 }
633
634
635 brw_set_predicate_control_flag_value(p, pc);
636 /* Copy m0..m3 to URB. */
637 brw_urb_WRITE(p,
638 brw_null_reg(),
639 0,
640 brw_vec8_grf(0, 0),
641 0, /* allocate */
642 1, /* used */
643 4, /* msg len */
644 0, /* response len */
645 last, /* eot */
646 last, /* writes complete */
647 i*4, /* urb destination offset */
648 BRW_URB_SWIZZLE_TRANSPOSE);
649 }
650 }
651
652 /* Points setup - several simplifications as all attributes are
653 * constant across the face of the point (point sprites excluded!)
654 */
655 void brw_emit_point_setup(struct brw_sf_compile *c, bool allocate)
656 {
657 struct brw_compile *p = &c->func;
658 GLuint i;
659
660 c->nr_verts = 1;
661
662 if (allocate)
663 alloc_regs(c);
664
665 copy_z_inv_w(c);
666
667 brw_MOV(p, c->m1Cx, brw_imm_ud(0)); /* zero - move out of loop */
668 brw_MOV(p, c->m2Cy, brw_imm_ud(0)); /* zero - move out of loop */
669
670 for (i = 0; i < c->nr_setup_regs; i++)
671 {
672 struct brw_reg a0 = offset(c->vert[0], i);
673 GLushort pc, pc_persp, pc_linear;
674 bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
675
676 if (pc_persp)
677 {
678 /* This seems odd as the values are all constant, but the
679 * fragment shader will be expecting it:
680 */
681 brw_set_predicate_control_flag_value(p, pc_persp);
682 brw_MUL(p, a0, a0, c->inv_w[0]);
683 }
684
685
686 /* The delta values are always zero, just send the starting
687 * coordinate. Again, this is to fit in with the interpolation
688 * code in the fragment shader.
689 */
690 {
691 brw_set_predicate_control_flag_value(p, pc);
692
693 brw_MOV(p, c->m3C0, a0); /* constant value */
694
695 /* Copy m0..m3 to URB.
696 */
697 brw_urb_WRITE(p,
698 brw_null_reg(),
699 0,
700 brw_vec8_grf(0, 0),
701 0, /* allocate */
702 1, /* used */
703 4, /* msg len */
704 0, /* response len */
705 last, /* eot */
706 last, /* writes complete */
707 i*4, /* urb destination offset */
708 BRW_URB_SWIZZLE_TRANSPOSE);
709 }
710 }
711 }
712
713 void brw_emit_anyprim_setup( struct brw_sf_compile *c )
714 {
715 struct brw_compile *p = &c->func;
716 struct brw_reg ip = brw_ip_reg();
717 struct brw_reg payload_prim = brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0);
718 struct brw_reg payload_attr = get_element_ud(brw_vec1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0), 0);
719 struct brw_reg primmask;
720 int jmp;
721 struct brw_reg v1_null_ud = vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD));
722
723 GLuint saveflag;
724
725 c->nr_verts = 3;
726 alloc_regs(c);
727
728 primmask = retype(get_element(c->tmp, 0), BRW_REGISTER_TYPE_UD);
729
730 brw_MOV(p, primmask, brw_imm_ud(1));
731 brw_SHL(p, primmask, primmask, payload_prim);
732
733 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z);
734 brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_TRILIST) |
735 (1<<_3DPRIM_TRISTRIP) |
736 (1<<_3DPRIM_TRIFAN) |
737 (1<<_3DPRIM_TRISTRIP_REVERSE) |
738 (1<<_3DPRIM_POLYGON) |
739 (1<<_3DPRIM_RECTLIST) |
740 (1<<_3DPRIM_TRIFAN_NOSTIPPLE)));
741 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store;
742 {
743 saveflag = p->flag_value;
744 brw_push_insn_state(p);
745 brw_emit_tri_setup( c, false );
746 brw_pop_insn_state(p);
747 p->flag_value = saveflag;
748 /* note - thread killed in subroutine, so must
749 * restore the flag which is changed when building
750 * the subroutine. fix #13240
751 */
752 }
753 brw_land_fwd_jump(p, jmp);
754
755 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z);
756 brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_LINELIST) |
757 (1<<_3DPRIM_LINESTRIP) |
758 (1<<_3DPRIM_LINELOOP) |
759 (1<<_3DPRIM_LINESTRIP_CONT) |
760 (1<<_3DPRIM_LINESTRIP_BF) |
761 (1<<_3DPRIM_LINESTRIP_CONT_BF)));
762 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store;
763 {
764 saveflag = p->flag_value;
765 brw_push_insn_state(p);
766 brw_emit_line_setup( c, false );
767 brw_pop_insn_state(p);
768 p->flag_value = saveflag;
769 /* note - thread killed in subroutine */
770 }
771 brw_land_fwd_jump(p, jmp);
772
773 brw_set_conditionalmod(p, BRW_CONDITIONAL_Z);
774 brw_AND(p, v1_null_ud, payload_attr, brw_imm_ud(1<<BRW_SPRITE_POINT_ENABLE));
775 jmp = brw_JMPI(p, ip, ip, brw_imm_d(0)) - p->store;
776 {
777 saveflag = p->flag_value;
778 brw_push_insn_state(p);
779 brw_emit_point_sprite_setup( c, false );
780 brw_pop_insn_state(p);
781 p->flag_value = saveflag;
782 }
783 brw_land_fwd_jump(p, jmp);
784
785 brw_emit_point_setup( c, false );
786 }
787
788
789
790