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i965: bump MAX_DEPTH_TEXTURE_SAMPLES to 4/8
[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, VARYING_SLOT_COL0+i) &&
90 have_attr(c, VARYING_SLOT_BFC0+i))
91 brw_MOV(p,
92 get_vert_result(c, vert, VARYING_SLOT_COL0+i),
93 get_vert_result(c, vert, VARYING_SLOT_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, VARYING_SLOT_COL0) && have_attr(c, VARYING_SLOT_BFC0)) &&
113 !(have_attr(c, VARYING_SLOT_COL1) && have_attr(c, VARYING_SLOT_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 VARYING_SLOT_COLOR_BITS (BITFIELD64_BIT(VARYING_SLOT_COL0) | \
142 BITFIELD64_BIT(VARYING_SLOT_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 = VARYING_SLOT_COL0; i <= VARYING_SLOT_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 & VARYING_SLOT_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 & VARYING_SLOT_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(VARYING_SLOT_POS) |
338 BITFIELD64_BIT(VARYING_SLOT_COL0) |
339 BITFIELD64_BIT(VARYING_SLOT_COL1));
340 else
341 persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VARYING_SLOT_POS));
342
343 if (c->key.do_flat_shading)
344 linear_mask = c->key.attrs & ~(BITFIELD64_BIT(VARYING_SLOT_COL0) |
345 BITFIELD64_BIT(VARYING_SLOT_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_VARYING_SLOT_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 >= VARYING_SLOT_TEX0 && vert_result1 <= VARYING_SLOT_TEX7) {
385 if (c->key.point_sprite_coord_replace & (1 << (vert_result1 - VARYING_SLOT_TEX0)))
386 pc |= 0x0f;
387 }
388 if (vert_result1 == BRW_VARYING_SLOT_PNTC)
389 pc |= 0x0f;
390
391 vert_result2 = vert_reg_to_vert_result(c, reg, 1);
392 if (vert_result2 >= VARYING_SLOT_TEX0 && vert_result2 <= VARYING_SLOT_TEX7) {
393 if (c->key.point_sprite_coord_replace & (1 << (vert_result2 -
394 VARYING_SLOT_TEX0)))
395 pc |= 0xf0;
396 }
397 if (vert_result2 == BRW_VARYING_SLOT_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