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Merge remote branch 'origin/master' into pipe-video
[mesa.git] / src / mesa / drivers / dri / i915 / i915_fragprog.c
1 /**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 #include "main/glheader.h"
29 #include "main/macros.h"
30 #include "main/enums.h"
31
32 #include "program/prog_instruction.h"
33 #include "program/prog_parameter.h"
34 #include "program/program.h"
35 #include "program/programopt.h"
36 #include "program/prog_print.h"
37
38 #include "tnl/tnl.h"
39 #include "tnl/t_context.h"
40
41 #include "intel_batchbuffer.h"
42
43 #include "i915_reg.h"
44 #include "i915_context.h"
45 #include "i915_program.h"
46
47 static const GLfloat sin_quad_constants[2][4] = {
48 {
49 2.0,
50 -1.0,
51 .5,
52 .75
53 },
54 {
55 4.0,
56 -4.0,
57 1.0 / (2.0 * M_PI),
58 .2225
59 }
60 };
61
62 static const GLfloat sin_constants[4] = { 1.0,
63 -1.0 / (3 * 2 * 1),
64 1.0 / (5 * 4 * 3 * 2 * 1),
65 -1.0 / (7 * 6 * 5 * 4 * 3 * 2 * 1)
66 };
67
68 /* 1, -1/2!, 1/4!, -1/6! */
69 static const GLfloat cos_constants[4] = { 1.0,
70 -1.0 / (2 * 1),
71 1.0 / (4 * 3 * 2 * 1),
72 -1.0 / (6 * 5 * 4 * 3 * 2 * 1)
73 };
74
75 /**
76 * Retrieve a ureg for the given source register. Will emit
77 * constants, apply swizzling and negation as needed.
78 */
79 static GLuint
80 src_vector(struct i915_fragment_program *p,
81 const struct prog_src_register *source,
82 const struct gl_fragment_program *program)
83 {
84 GLuint src;
85
86 switch (source->File) {
87
88 /* Registers:
89 */
90 case PROGRAM_TEMPORARY:
91 if (source->Index >= I915_MAX_TEMPORARY) {
92 i915_program_error(p, "Exceeded max temporary reg: %d/%d",
93 source->Index, I915_MAX_TEMPORARY);
94 return 0;
95 }
96 src = UREG(REG_TYPE_R, source->Index);
97 break;
98 case PROGRAM_INPUT:
99 switch (source->Index) {
100 case FRAG_ATTRIB_WPOS:
101 src = i915_emit_decl(p, REG_TYPE_T, p->wpos_tex, D0_CHANNEL_ALL);
102 break;
103 case FRAG_ATTRIB_COL0:
104 src = i915_emit_decl(p, REG_TYPE_T, T_DIFFUSE, D0_CHANNEL_ALL);
105 break;
106 case FRAG_ATTRIB_COL1:
107 src = i915_emit_decl(p, REG_TYPE_T, T_SPECULAR, D0_CHANNEL_XYZ);
108 src = swizzle(src, X, Y, Z, ONE);
109 break;
110 case FRAG_ATTRIB_FOGC:
111 src = i915_emit_decl(p, REG_TYPE_T, T_FOG_W, D0_CHANNEL_W);
112 src = swizzle(src, W, ZERO, ZERO, ONE);
113 break;
114 case FRAG_ATTRIB_TEX0:
115 case FRAG_ATTRIB_TEX1:
116 case FRAG_ATTRIB_TEX2:
117 case FRAG_ATTRIB_TEX3:
118 case FRAG_ATTRIB_TEX4:
119 case FRAG_ATTRIB_TEX5:
120 case FRAG_ATTRIB_TEX6:
121 case FRAG_ATTRIB_TEX7:
122 src = i915_emit_decl(p, REG_TYPE_T,
123 T_TEX0 + (source->Index - FRAG_ATTRIB_TEX0),
124 D0_CHANNEL_ALL);
125 break;
126
127 case FRAG_ATTRIB_VAR0:
128 case FRAG_ATTRIB_VAR0 + 1:
129 case FRAG_ATTRIB_VAR0 + 2:
130 case FRAG_ATTRIB_VAR0 + 3:
131 case FRAG_ATTRIB_VAR0 + 4:
132 case FRAG_ATTRIB_VAR0 + 5:
133 case FRAG_ATTRIB_VAR0 + 6:
134 case FRAG_ATTRIB_VAR0 + 7:
135 src = i915_emit_decl(p, REG_TYPE_T,
136 T_TEX0 + (source->Index - FRAG_ATTRIB_VAR0),
137 D0_CHANNEL_ALL);
138 break;
139
140 default:
141 i915_program_error(p, "Bad source->Index: %d", source->Index);
142 return 0;
143 }
144 break;
145
146 case PROGRAM_OUTPUT:
147 switch (source->Index) {
148 case FRAG_RESULT_COLOR:
149 src = UREG(REG_TYPE_OC, 0);
150 break;
151 case FRAG_RESULT_DEPTH:
152 src = UREG(REG_TYPE_OD, 0);
153 break;
154 default:
155 i915_program_error(p, "Bad source->Index: %d", source->Index);
156 return 0;
157 }
158 break;
159
160 /* Various paramters and env values. All emitted to
161 * hardware as program constants.
162 */
163 case PROGRAM_LOCAL_PARAM:
164 src = i915_emit_param4fv(p, program->Base.LocalParams[source->Index]);
165 break;
166
167 case PROGRAM_ENV_PARAM:
168 src =
169 i915_emit_param4fv(p,
170 p->ctx->FragmentProgram.Parameters[source->
171 Index]);
172 break;
173
174 case PROGRAM_CONSTANT:
175 case PROGRAM_STATE_VAR:
176 case PROGRAM_NAMED_PARAM:
177 case PROGRAM_UNIFORM:
178 src =
179 i915_emit_param4fv(p,
180 program->Base.Parameters->ParameterValues[source->
181 Index]);
182 break;
183
184 default:
185 i915_program_error(p, "Bad source->File: %d", source->File);
186 return 0;
187 }
188
189 src = swizzle(src,
190 GET_SWZ(source->Swizzle, 0),
191 GET_SWZ(source->Swizzle, 1),
192 GET_SWZ(source->Swizzle, 2), GET_SWZ(source->Swizzle, 3));
193
194 if (source->Negate)
195 src = negate(src,
196 GET_BIT(source->Negate, 0),
197 GET_BIT(source->Negate, 1),
198 GET_BIT(source->Negate, 2),
199 GET_BIT(source->Negate, 3));
200
201 return src;
202 }
203
204
205 static GLuint
206 get_result_vector(struct i915_fragment_program *p,
207 const struct prog_instruction *inst)
208 {
209 switch (inst->DstReg.File) {
210 case PROGRAM_OUTPUT:
211 switch (inst->DstReg.Index) {
212 case FRAG_RESULT_COLOR:
213 return UREG(REG_TYPE_OC, 0);
214 case FRAG_RESULT_DEPTH:
215 p->depth_written = 1;
216 return UREG(REG_TYPE_OD, 0);
217 default:
218 i915_program_error(p, "Bad inst->DstReg.Index: %d",
219 inst->DstReg.Index);
220 return 0;
221 }
222 case PROGRAM_TEMPORARY:
223 return UREG(REG_TYPE_R, inst->DstReg.Index);
224 default:
225 i915_program_error(p, "Bad inst->DstReg.File: %d", inst->DstReg.File);
226 return 0;
227 }
228 }
229
230 static GLuint
231 get_result_flags(const struct prog_instruction *inst)
232 {
233 GLuint flags = 0;
234
235 if (inst->SaturateMode == SATURATE_ZERO_ONE)
236 flags |= A0_DEST_SATURATE;
237 if (inst->DstReg.WriteMask & WRITEMASK_X)
238 flags |= A0_DEST_CHANNEL_X;
239 if (inst->DstReg.WriteMask & WRITEMASK_Y)
240 flags |= A0_DEST_CHANNEL_Y;
241 if (inst->DstReg.WriteMask & WRITEMASK_Z)
242 flags |= A0_DEST_CHANNEL_Z;
243 if (inst->DstReg.WriteMask & WRITEMASK_W)
244 flags |= A0_DEST_CHANNEL_W;
245
246 return flags;
247 }
248
249 static GLuint
250 translate_tex_src_target(struct i915_fragment_program *p, GLubyte bit)
251 {
252 switch (bit) {
253 case TEXTURE_1D_INDEX:
254 return D0_SAMPLE_TYPE_2D;
255 case TEXTURE_2D_INDEX:
256 return D0_SAMPLE_TYPE_2D;
257 case TEXTURE_RECT_INDEX:
258 return D0_SAMPLE_TYPE_2D;
259 case TEXTURE_3D_INDEX:
260 return D0_SAMPLE_TYPE_VOLUME;
261 case TEXTURE_CUBE_INDEX:
262 return D0_SAMPLE_TYPE_CUBE;
263 default:
264 i915_program_error(p, "TexSrcBit: %d", bit);
265 return 0;
266 }
267 }
268
269 #define EMIT_TEX( OP ) \
270 do { \
271 GLuint dim = translate_tex_src_target( p, inst->TexSrcTarget ); \
272 const struct gl_fragment_program *program = &p->FragProg; \
273 GLuint unit = program->Base.SamplerUnits[inst->TexSrcUnit]; \
274 GLuint sampler = i915_emit_decl(p, REG_TYPE_S, \
275 unit, dim); \
276 GLuint coord = src_vector( p, &inst->SrcReg[0], program); \
277 /* Texel lookup */ \
278 \
279 i915_emit_texld( p, get_live_regs(p, inst), \
280 get_result_vector( p, inst ), \
281 get_result_flags( inst ), \
282 sampler, \
283 coord, \
284 OP); \
285 } while (0)
286
287 #define EMIT_ARITH( OP, N ) \
288 do { \
289 i915_emit_arith( p, \
290 OP, \
291 get_result_vector( p, inst ), \
292 get_result_flags( inst ), 0, \
293 (N<1)?0:src_vector( p, &inst->SrcReg[0], program), \
294 (N<2)?0:src_vector( p, &inst->SrcReg[1], program), \
295 (N<3)?0:src_vector( p, &inst->SrcReg[2], program)); \
296 } while (0)
297
298 #define EMIT_1ARG_ARITH( OP ) EMIT_ARITH( OP, 1 )
299 #define EMIT_2ARG_ARITH( OP ) EMIT_ARITH( OP, 2 )
300 #define EMIT_3ARG_ARITH( OP ) EMIT_ARITH( OP, 3 )
301
302 /*
303 * TODO: consider moving this into core
304 */
305 static void calc_live_regs( struct i915_fragment_program *p )
306 {
307 const struct gl_fragment_program *program = &p->FragProg;
308 GLuint regsUsed = 0xffff0000;
309 uint8_t live_components[16] = { 0, };
310 GLint i;
311
312 for (i = program->Base.NumInstructions - 1; i >= 0; i--) {
313 struct prog_instruction *inst = &program->Base.Instructions[i];
314 int opArgs = _mesa_num_inst_src_regs(inst->Opcode);
315 int a;
316
317 /* Register is written to: unmark as live for this and preceeding ops */
318 if (inst->DstReg.File == PROGRAM_TEMPORARY) {
319 live_components[inst->DstReg.Index] &= ~inst->DstReg.WriteMask;
320 if (live_components[inst->DstReg.Index] == 0)
321 regsUsed &= ~(1 << inst->DstReg.Index);
322 }
323
324 for (a = 0; a < opArgs; a++) {
325 /* Register is read from: mark as live for this and preceeding ops */
326 if (inst->SrcReg[a].File == PROGRAM_TEMPORARY) {
327 unsigned c;
328
329 regsUsed |= 1 << inst->SrcReg[a].Index;
330
331 for (c = 0; c < 4; c++) {
332 const unsigned field = GET_SWZ(inst->SrcReg[a].Swizzle, c);
333
334 if (field <= SWIZZLE_W)
335 live_components[inst->SrcReg[a].Index] |= (1U << field);
336 }
337 }
338 }
339
340 p->usedRegs[i] = regsUsed;
341 }
342 }
343
344 static GLuint get_live_regs( struct i915_fragment_program *p,
345 const struct prog_instruction *inst )
346 {
347 const struct gl_fragment_program *program = &p->FragProg;
348 GLuint nr = inst - program->Base.Instructions;
349
350 return p->usedRegs[nr];
351 }
352
353
354 /* Possible concerns:
355 *
356 * SIN, COS -- could use another taylor step?
357 * LIT -- results seem a little different to sw mesa
358 * LOG -- different to mesa on negative numbers, but this is conformant.
359 *
360 * Parse failures -- Mesa doesn't currently give a good indication
361 * internally whether a particular program string parsed or not. This
362 * can lead to confusion -- hopefully we cope with it ok now.
363 *
364 */
365 static void
366 upload_program(struct i915_fragment_program *p)
367 {
368 const struct gl_fragment_program *program = &p->FragProg;
369 const struct prog_instruction *inst = program->Base.Instructions;
370
371 if (INTEL_DEBUG & DEBUG_WM)
372 _mesa_print_program(&program->Base);
373
374 /* Is this a parse-failed program? Ensure a valid program is
375 * loaded, as the flagging of an error isn't sufficient to stop
376 * this being uploaded to hardware.
377 */
378 if (inst[0].Opcode == OPCODE_END) {
379 GLuint tmp = i915_get_utemp(p);
380 i915_emit_arith(p,
381 A0_MOV,
382 UREG(REG_TYPE_OC, 0),
383 A0_DEST_CHANNEL_ALL, 0,
384 swizzle(tmp, ONE, ZERO, ONE, ONE), 0, 0);
385 return;
386 }
387
388 if (program->Base.NumInstructions > I915_MAX_INSN) {
389 i915_program_error(p, "Exceeded max instructions (%d out of %d)",
390 program->Base.NumInstructions, I915_MAX_INSN);
391 return;
392 }
393
394 /* Not always needed:
395 */
396 calc_live_regs(p);
397
398 while (1) {
399 GLuint src0, src1, src2, flags;
400 GLuint tmp = 0, dst, consts0 = 0, consts1 = 0;
401
402 switch (inst->Opcode) {
403 case OPCODE_ABS:
404 src0 = src_vector(p, &inst->SrcReg[0], program);
405 i915_emit_arith(p,
406 A0_MAX,
407 get_result_vector(p, inst),
408 get_result_flags(inst), 0,
409 src0, negate(src0, 1, 1, 1, 1), 0);
410 break;
411
412 case OPCODE_ADD:
413 EMIT_2ARG_ARITH(A0_ADD);
414 break;
415
416 case OPCODE_CMP:
417 src0 = src_vector(p, &inst->SrcReg[0], program);
418 src1 = src_vector(p, &inst->SrcReg[1], program);
419 src2 = src_vector(p, &inst->SrcReg[2], program);
420 i915_emit_arith(p, A0_CMP, get_result_vector(p, inst), get_result_flags(inst), 0, src0, src2, src1); /* NOTE: order of src2, src1 */
421 break;
422
423 case OPCODE_COS:
424 src0 = src_vector(p, &inst->SrcReg[0], program);
425 tmp = i915_get_utemp(p);
426 consts0 = i915_emit_const4fv(p, sin_quad_constants[0]);
427 consts1 = i915_emit_const4fv(p, sin_quad_constants[1]);
428
429 /* Reduce range from repeating about [-pi,pi] to [-1,1] */
430 i915_emit_arith(p,
431 A0_MAD,
432 tmp, A0_DEST_CHANNEL_X, 0,
433 src0,
434 swizzle(consts1, Z, ZERO, ZERO, ZERO), /* 1/(2pi) */
435 swizzle(consts0, W, ZERO, ZERO, ZERO)); /* .75 */
436
437 i915_emit_arith(p, A0_FRC, tmp, A0_DEST_CHANNEL_X, 0, tmp, 0, 0);
438
439 i915_emit_arith(p,
440 A0_MAD,
441 tmp, A0_DEST_CHANNEL_X, 0,
442 tmp,
443 swizzle(consts0, X, ZERO, ZERO, ZERO), /* 2 */
444 swizzle(consts0, Y, ZERO, ZERO, ZERO)); /* -1 */
445
446 /* Compute COS with the same calculation used for SIN, but a
447 * different source range has been mapped to [-1,1] this time.
448 */
449
450 /* tmp.y = abs(tmp.x); {x, abs(x), 0, 0} */
451 i915_emit_arith(p,
452 A0_MAX,
453 tmp, A0_DEST_CHANNEL_Y, 0,
454 swizzle(tmp, ZERO, X, ZERO, ZERO),
455 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
456 0);
457
458 /* tmp.y = tmp.y * tmp.x; {x, x * abs(x), 0, 0} */
459 i915_emit_arith(p,
460 A0_MUL,
461 tmp, A0_DEST_CHANNEL_Y, 0,
462 swizzle(tmp, ZERO, X, ZERO, ZERO),
463 tmp,
464 0);
465
466 /* tmp.x = tmp.xy DP sin_quad_constants[2].xy */
467 i915_emit_arith(p,
468 A0_DP3,
469 tmp, A0_DEST_CHANNEL_X, 0,
470 tmp,
471 swizzle(consts1, X, Y, ZERO, ZERO),
472 0);
473
474 /* tmp.x now contains a first approximation (y). Now, weight it
475 * against tmp.y**2 to get closer.
476 */
477 i915_emit_arith(p,
478 A0_MAX,
479 tmp, A0_DEST_CHANNEL_Y, 0,
480 swizzle(tmp, ZERO, X, ZERO, ZERO),
481 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
482 0);
483
484 /* tmp.y = tmp.x * tmp.y - tmp.x; {y, y * abs(y) - y, 0, 0} */
485 i915_emit_arith(p,
486 A0_MAD,
487 tmp, A0_DEST_CHANNEL_Y, 0,
488 swizzle(tmp, ZERO, X, ZERO, ZERO),
489 swizzle(tmp, ZERO, Y, ZERO, ZERO),
490 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0));
491
492 /* result = .2225 * tmp.y + tmp.x =.2225(y * abs(y) - y) + y= */
493 i915_emit_arith(p,
494 A0_MAD,
495 get_result_vector(p, inst),
496 get_result_flags(inst), 0,
497 swizzle(consts1, W, W, W, W),
498 swizzle(tmp, Y, Y, Y, Y),
499 swizzle(tmp, X, X, X, X));
500 break;
501
502 case OPCODE_DP2:
503 src0 = src_vector(p, &inst->SrcReg[0], program);
504 src1 = src_vector(p, &inst->SrcReg[1], program);
505 i915_emit_arith(p,
506 A0_DP3,
507 get_result_vector(p, inst),
508 get_result_flags(inst), 0,
509 swizzle(src0, X, Y, ZERO, ZERO),
510 swizzle(src1, X, Y, ZERO, ZERO),
511 0);
512 break;
513
514 case OPCODE_DP3:
515 EMIT_2ARG_ARITH(A0_DP3);
516 break;
517
518 case OPCODE_DP4:
519 EMIT_2ARG_ARITH(A0_DP4);
520 break;
521
522 case OPCODE_DPH:
523 src0 = src_vector(p, &inst->SrcReg[0], program);
524 src1 = src_vector(p, &inst->SrcReg[1], program);
525
526 i915_emit_arith(p,
527 A0_DP4,
528 get_result_vector(p, inst),
529 get_result_flags(inst), 0,
530 swizzle(src0, X, Y, Z, ONE), src1, 0);
531 break;
532
533 case OPCODE_DST:
534 src0 = src_vector(p, &inst->SrcReg[0], program);
535 src1 = src_vector(p, &inst->SrcReg[1], program);
536
537 /* result[0] = 1 * 1;
538 * result[1] = a[1] * b[1];
539 * result[2] = a[2] * 1;
540 * result[3] = 1 * b[3];
541 */
542 i915_emit_arith(p,
543 A0_MUL,
544 get_result_vector(p, inst),
545 get_result_flags(inst), 0,
546 swizzle(src0, ONE, Y, Z, ONE),
547 swizzle(src1, ONE, Y, ONE, W), 0);
548 break;
549
550 case OPCODE_EX2:
551 src0 = src_vector(p, &inst->SrcReg[0], program);
552
553 i915_emit_arith(p,
554 A0_EXP,
555 get_result_vector(p, inst),
556 get_result_flags(inst), 0,
557 swizzle(src0, X, X, X, X), 0, 0);
558 break;
559
560 case OPCODE_FLR:
561 EMIT_1ARG_ARITH(A0_FLR);
562 break;
563
564 case OPCODE_TRUNC:
565 EMIT_1ARG_ARITH(A0_TRC);
566 break;
567
568 case OPCODE_FRC:
569 EMIT_1ARG_ARITH(A0_FRC);
570 break;
571
572 case OPCODE_KIL:
573 src0 = src_vector(p, &inst->SrcReg[0], program);
574 tmp = i915_get_utemp(p);
575
576 i915_emit_texld(p, get_live_regs(p, inst),
577 tmp, A0_DEST_CHANNEL_ALL, /* use a dummy dest reg */
578 0, src0, T0_TEXKILL);
579 break;
580
581 case OPCODE_KIL_NV:
582 if (inst->DstReg.CondMask == COND_TR) {
583 tmp = i915_get_utemp(p);
584
585 /* The KIL instruction discards the fragment if any component of
586 * the source is < 0. Emit an immediate operand of {-1}.xywz.
587 */
588 i915_emit_texld(p, get_live_regs(p, inst),
589 tmp, A0_DEST_CHANNEL_ALL,
590 0, /* use a dummy dest reg */
591 negate(swizzle(tmp, ONE, ONE, ONE, ONE),
592 1, 1, 1, 1),
593 T0_TEXKILL);
594 } else {
595 p->error = 1;
596 i915_program_error(p, "Unsupported KIL_NV condition code: %d",
597 inst->DstReg.CondMask);
598 }
599 break;
600
601 case OPCODE_LG2:
602 src0 = src_vector(p, &inst->SrcReg[0], program);
603
604 i915_emit_arith(p,
605 A0_LOG,
606 get_result_vector(p, inst),
607 get_result_flags(inst), 0,
608 swizzle(src0, X, X, X, X), 0, 0);
609 break;
610
611 case OPCODE_LIT:
612 src0 = src_vector(p, &inst->SrcReg[0], program);
613 tmp = i915_get_utemp(p);
614
615 /* tmp = max( a.xyzw, a.00zw )
616 * XXX: Clamp tmp.w to -128..128
617 * tmp.y = log(tmp.y)
618 * tmp.y = tmp.w * tmp.y
619 * tmp.y = exp(tmp.y)
620 * result = cmp (a.11-x1, a.1x01, a.1xy1 )
621 */
622 i915_emit_arith(p, A0_MAX, tmp, A0_DEST_CHANNEL_ALL, 0,
623 src0, swizzle(src0, ZERO, ZERO, Z, W), 0);
624
625 i915_emit_arith(p, A0_LOG, tmp, A0_DEST_CHANNEL_Y, 0,
626 swizzle(tmp, Y, Y, Y, Y), 0, 0);
627
628 i915_emit_arith(p, A0_MUL, tmp, A0_DEST_CHANNEL_Y, 0,
629 swizzle(tmp, ZERO, Y, ZERO, ZERO),
630 swizzle(tmp, ZERO, W, ZERO, ZERO), 0);
631
632 i915_emit_arith(p, A0_EXP, tmp, A0_DEST_CHANNEL_Y, 0,
633 swizzle(tmp, Y, Y, Y, Y), 0, 0);
634
635 i915_emit_arith(p, A0_CMP,
636 get_result_vector(p, inst),
637 get_result_flags(inst), 0,
638 negate(swizzle(tmp, ONE, ONE, X, ONE), 0, 0, 1, 0),
639 swizzle(tmp, ONE, X, ZERO, ONE),
640 swizzle(tmp, ONE, X, Y, ONE));
641
642 break;
643
644 case OPCODE_LRP:
645 src0 = src_vector(p, &inst->SrcReg[0], program);
646 src1 = src_vector(p, &inst->SrcReg[1], program);
647 src2 = src_vector(p, &inst->SrcReg[2], program);
648 flags = get_result_flags(inst);
649 tmp = i915_get_utemp(p);
650
651 /* b*a + c*(1-a)
652 *
653 * b*a + c - ca
654 *
655 * tmp = b*a + c,
656 * result = (-c)*a + tmp
657 */
658 i915_emit_arith(p, A0_MAD, tmp,
659 flags & A0_DEST_CHANNEL_ALL, 0, src1, src0, src2);
660
661 i915_emit_arith(p, A0_MAD,
662 get_result_vector(p, inst),
663 flags, 0, negate(src2, 1, 1, 1, 1), src0, tmp);
664 break;
665
666 case OPCODE_MAD:
667 EMIT_3ARG_ARITH(A0_MAD);
668 break;
669
670 case OPCODE_MAX:
671 EMIT_2ARG_ARITH(A0_MAX);
672 break;
673
674 case OPCODE_MIN:
675 src0 = src_vector(p, &inst->SrcReg[0], program);
676 src1 = src_vector(p, &inst->SrcReg[1], program);
677 tmp = i915_get_utemp(p);
678 flags = get_result_flags(inst);
679
680 i915_emit_arith(p,
681 A0_MAX,
682 tmp, flags & A0_DEST_CHANNEL_ALL, 0,
683 negate(src0, 1, 1, 1, 1),
684 negate(src1, 1, 1, 1, 1), 0);
685
686 i915_emit_arith(p,
687 A0_MOV,
688 get_result_vector(p, inst),
689 flags, 0, negate(tmp, 1, 1, 1, 1), 0, 0);
690 break;
691
692 case OPCODE_MOV:
693 EMIT_1ARG_ARITH(A0_MOV);
694 break;
695
696 case OPCODE_MUL:
697 EMIT_2ARG_ARITH(A0_MUL);
698 break;
699
700 case OPCODE_POW:
701 src0 = src_vector(p, &inst->SrcReg[0], program);
702 src1 = src_vector(p, &inst->SrcReg[1], program);
703 tmp = i915_get_utemp(p);
704 flags = get_result_flags(inst);
705
706 /* XXX: masking on intermediate values, here and elsewhere.
707 */
708 i915_emit_arith(p,
709 A0_LOG,
710 tmp, A0_DEST_CHANNEL_X, 0,
711 swizzle(src0, X, X, X, X), 0, 0);
712
713 i915_emit_arith(p, A0_MUL, tmp, A0_DEST_CHANNEL_X, 0, tmp, src1, 0);
714
715
716 i915_emit_arith(p,
717 A0_EXP,
718 get_result_vector(p, inst),
719 flags, 0, swizzle(tmp, X, X, X, X), 0, 0);
720
721 break;
722
723 case OPCODE_RCP:
724 src0 = src_vector(p, &inst->SrcReg[0], program);
725
726 i915_emit_arith(p,
727 A0_RCP,
728 get_result_vector(p, inst),
729 get_result_flags(inst), 0,
730 swizzle(src0, X, X, X, X), 0, 0);
731 break;
732
733 case OPCODE_RSQ:
734
735 src0 = src_vector(p, &inst->SrcReg[0], program);
736
737 i915_emit_arith(p,
738 A0_RSQ,
739 get_result_vector(p, inst),
740 get_result_flags(inst), 0,
741 swizzle(src0, X, X, X, X), 0, 0);
742 break;
743
744 case OPCODE_SCS:
745 src0 = src_vector(p, &inst->SrcReg[0], program);
746 tmp = i915_get_utemp(p);
747
748 /*
749 * t0.xy = MUL x.xx11, x.x1111 ; x^2, x, 1, 1
750 * t0 = MUL t0.xyxy t0.xx11 ; x^4, x^3, x^2, x
751 * t1 = MUL t0.xyyw t0.yz11 ; x^7 x^5 x^3 x
752 * scs.x = DP4 t1, sin_constants
753 * t1 = MUL t0.xxz1 t0.z111 ; x^6 x^4 x^2 1
754 * scs.y = DP4 t1, cos_constants
755 */
756 i915_emit_arith(p,
757 A0_MUL,
758 tmp, A0_DEST_CHANNEL_XY, 0,
759 swizzle(src0, X, X, ONE, ONE),
760 swizzle(src0, X, ONE, ONE, ONE), 0);
761
762 i915_emit_arith(p,
763 A0_MUL,
764 tmp, A0_DEST_CHANNEL_ALL, 0,
765 swizzle(tmp, X, Y, X, Y),
766 swizzle(tmp, X, X, ONE, ONE), 0);
767
768 if (inst->DstReg.WriteMask & WRITEMASK_Y) {
769 GLuint tmp1;
770
771 if (inst->DstReg.WriteMask & WRITEMASK_X)
772 tmp1 = i915_get_utemp(p);
773 else
774 tmp1 = tmp;
775
776 i915_emit_arith(p,
777 A0_MUL,
778 tmp1, A0_DEST_CHANNEL_ALL, 0,
779 swizzle(tmp, X, Y, Y, W),
780 swizzle(tmp, X, Z, ONE, ONE), 0);
781
782 i915_emit_arith(p,
783 A0_DP4,
784 get_result_vector(p, inst),
785 A0_DEST_CHANNEL_Y, 0,
786 swizzle(tmp1, W, Z, Y, X),
787 i915_emit_const4fv(p, sin_constants), 0);
788 }
789
790 if (inst->DstReg.WriteMask & WRITEMASK_X) {
791 i915_emit_arith(p,
792 A0_MUL,
793 tmp, A0_DEST_CHANNEL_XYZ, 0,
794 swizzle(tmp, X, X, Z, ONE),
795 swizzle(tmp, Z, ONE, ONE, ONE), 0);
796
797 i915_emit_arith(p,
798 A0_DP4,
799 get_result_vector(p, inst),
800 A0_DEST_CHANNEL_X, 0,
801 swizzle(tmp, ONE, Z, Y, X),
802 i915_emit_const4fv(p, cos_constants), 0);
803 }
804 break;
805
806 case OPCODE_SEQ:
807 tmp = i915_get_utemp(p);
808 flags = get_result_flags(inst);
809 dst = get_result_vector(p, inst);
810
811 /* tmp = src1 >= src2 */
812 i915_emit_arith(p,
813 A0_SGE,
814 tmp,
815 flags, 0,
816 src_vector(p, &inst->SrcReg[0], program),
817 src_vector(p, &inst->SrcReg[1], program),
818 0);
819 /* dst = src1 <= src2 */
820 i915_emit_arith(p,
821 A0_SGE,
822 dst,
823 flags, 0,
824 negate(src_vector(p, &inst->SrcReg[0], program),
825 1, 1, 1, 1),
826 negate(src_vector(p, &inst->SrcReg[1], program),
827 1, 1, 1, 1),
828 0);
829 /* dst = tmp && dst */
830 i915_emit_arith(p,
831 A0_MUL,
832 dst,
833 flags, 0,
834 dst,
835 tmp,
836 0);
837 break;
838
839 case OPCODE_SIN:
840 src0 = src_vector(p, &inst->SrcReg[0], program);
841 tmp = i915_get_utemp(p);
842 consts0 = i915_emit_const4fv(p, sin_quad_constants[0]);
843 consts1 = i915_emit_const4fv(p, sin_quad_constants[1]);
844
845 /* Reduce range from repeating about [-pi,pi] to [-1,1] */
846 i915_emit_arith(p,
847 A0_MAD,
848 tmp, A0_DEST_CHANNEL_X, 0,
849 src0,
850 swizzle(consts1, Z, ZERO, ZERO, ZERO), /* 1/(2pi) */
851 swizzle(consts0, Z, ZERO, ZERO, ZERO)); /* .5 */
852
853 i915_emit_arith(p, A0_FRC, tmp, A0_DEST_CHANNEL_X, 0, tmp, 0, 0);
854
855 i915_emit_arith(p,
856 A0_MAD,
857 tmp, A0_DEST_CHANNEL_X, 0,
858 tmp,
859 swizzle(consts0, X, ZERO, ZERO, ZERO), /* 2 */
860 swizzle(consts0, Y, ZERO, ZERO, ZERO)); /* -1 */
861
862 /* Compute sin using a quadratic and quartic. It gives continuity
863 * that repeating the Taylor series lacks every 2*pi, and has
864 * reduced error.
865 *
866 * The idea was described at:
867 * http://www.devmaster.net/forums/showthread.php?t=5784
868 */
869
870 /* tmp.y = abs(tmp.x); {x, abs(x), 0, 0} */
871 i915_emit_arith(p,
872 A0_MAX,
873 tmp, A0_DEST_CHANNEL_Y, 0,
874 swizzle(tmp, ZERO, X, ZERO, ZERO),
875 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
876 0);
877
878 /* tmp.y = tmp.y * tmp.x; {x, x * abs(x), 0, 0} */
879 i915_emit_arith(p,
880 A0_MUL,
881 tmp, A0_DEST_CHANNEL_Y, 0,
882 swizzle(tmp, ZERO, X, ZERO, ZERO),
883 tmp,
884 0);
885
886 /* tmp.x = tmp.xy DP sin_quad_constants[2].xy */
887 i915_emit_arith(p,
888 A0_DP3,
889 tmp, A0_DEST_CHANNEL_X, 0,
890 tmp,
891 swizzle(consts1, X, Y, ZERO, ZERO),
892 0);
893
894 /* tmp.x now contains a first approximation (y). Now, weight it
895 * against tmp.y**2 to get closer.
896 */
897 i915_emit_arith(p,
898 A0_MAX,
899 tmp, A0_DEST_CHANNEL_Y, 0,
900 swizzle(tmp, ZERO, X, ZERO, ZERO),
901 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
902 0);
903
904 /* tmp.y = tmp.x * tmp.y - tmp.x; {y, y * abs(y) - y, 0, 0} */
905 i915_emit_arith(p,
906 A0_MAD,
907 tmp, A0_DEST_CHANNEL_Y, 0,
908 swizzle(tmp, ZERO, X, ZERO, ZERO),
909 swizzle(tmp, ZERO, Y, ZERO, ZERO),
910 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0));
911
912 /* result = .2225 * tmp.y + tmp.x =.2225(y * abs(y) - y) + y= */
913 i915_emit_arith(p,
914 A0_MAD,
915 get_result_vector(p, inst),
916 get_result_flags(inst), 0,
917 swizzle(consts1, W, W, W, W),
918 swizzle(tmp, Y, Y, Y, Y),
919 swizzle(tmp, X, X, X, X));
920
921 break;
922
923 case OPCODE_SGE:
924 EMIT_2ARG_ARITH(A0_SGE);
925 break;
926
927 case OPCODE_SGT:
928 i915_emit_arith(p,
929 A0_SLT,
930 get_result_vector( p, inst ),
931 get_result_flags( inst ), 0,
932 negate(src_vector( p, &inst->SrcReg[0], program),
933 1, 1, 1, 1),
934 negate(src_vector( p, &inst->SrcReg[1], program),
935 1, 1, 1, 1),
936 0);
937 break;
938
939 case OPCODE_SLE:
940 i915_emit_arith(p,
941 A0_SGE,
942 get_result_vector( p, inst ),
943 get_result_flags( inst ), 0,
944 negate(src_vector( p, &inst->SrcReg[0], program),
945 1, 1, 1, 1),
946 negate(src_vector( p, &inst->SrcReg[1], program),
947 1, 1, 1, 1),
948 0);
949 break;
950
951 case OPCODE_SLT:
952 EMIT_2ARG_ARITH(A0_SLT);
953 break;
954
955 case OPCODE_SNE:
956 tmp = i915_get_utemp(p);
957 flags = get_result_flags(inst);
958 dst = get_result_vector(p, inst);
959
960 /* tmp = src1 < src2 */
961 i915_emit_arith(p,
962 A0_SLT,
963 tmp,
964 flags, 0,
965 src_vector(p, &inst->SrcReg[0], program),
966 src_vector(p, &inst->SrcReg[1], program),
967 0);
968 /* dst = src1 > src2 */
969 i915_emit_arith(p,
970 A0_SLT,
971 dst,
972 flags, 0,
973 negate(src_vector(p, &inst->SrcReg[0], program),
974 1, 1, 1, 1),
975 negate(src_vector(p, &inst->SrcReg[1], program),
976 1, 1, 1, 1),
977 0);
978 /* dst = tmp || dst */
979 i915_emit_arith(p,
980 A0_ADD,
981 dst,
982 flags | A0_DEST_SATURATE, 0,
983 dst,
984 tmp,
985 0);
986 break;
987
988 case OPCODE_SSG:
989 dst = get_result_vector(p, inst);
990 flags = get_result_flags(inst);
991 src0 = src_vector(p, &inst->SrcReg[0], program);
992 tmp = i915_get_utemp(p);
993
994 /* tmp = (src < 0.0) */
995 i915_emit_arith(p,
996 A0_SLT,
997 tmp,
998 flags, 0,
999 src0,
1000 swizzle(src0, ZERO, ZERO, ZERO, ZERO),
1001 0);
1002
1003 /* dst = (0.0 < src) */
1004 i915_emit_arith(p,
1005 A0_SLT,
1006 dst,
1007 flags, 0,
1008 swizzle(src0, ZERO, ZERO, ZERO, ZERO),
1009 src0,
1010 0);
1011
1012 /* dst = (src > 0.0) - (src < 0.0) */
1013 i915_emit_arith(p,
1014 A0_ADD,
1015 dst,
1016 flags, 0,
1017 dst,
1018 negate(tmp, 1, 1, 1, 1),
1019 0);
1020
1021 break;
1022
1023 case OPCODE_SUB:
1024 src0 = src_vector(p, &inst->SrcReg[0], program);
1025 src1 = src_vector(p, &inst->SrcReg[1], program);
1026
1027 i915_emit_arith(p,
1028 A0_ADD,
1029 get_result_vector(p, inst),
1030 get_result_flags(inst), 0,
1031 src0, negate(src1, 1, 1, 1, 1), 0);
1032 break;
1033
1034 case OPCODE_SWZ:
1035 EMIT_1ARG_ARITH(A0_MOV); /* extended swizzle handled natively */
1036 break;
1037
1038 case OPCODE_TEX:
1039 EMIT_TEX(T0_TEXLD);
1040 break;
1041
1042 case OPCODE_TXB:
1043 EMIT_TEX(T0_TEXLDB);
1044 break;
1045
1046 case OPCODE_TXP:
1047 EMIT_TEX(T0_TEXLDP);
1048 break;
1049
1050 case OPCODE_XPD:
1051 /* Cross product:
1052 * result.x = src0.y * src1.z - src0.z * src1.y;
1053 * result.y = src0.z * src1.x - src0.x * src1.z;
1054 * result.z = src0.x * src1.y - src0.y * src1.x;
1055 * result.w = undef;
1056 */
1057 src0 = src_vector(p, &inst->SrcReg[0], program);
1058 src1 = src_vector(p, &inst->SrcReg[1], program);
1059 tmp = i915_get_utemp(p);
1060
1061 i915_emit_arith(p,
1062 A0_MUL,
1063 tmp, A0_DEST_CHANNEL_ALL, 0,
1064 swizzle(src0, Z, X, Y, ONE),
1065 swizzle(src1, Y, Z, X, ONE), 0);
1066
1067 i915_emit_arith(p,
1068 A0_MAD,
1069 get_result_vector(p, inst),
1070 get_result_flags(inst), 0,
1071 swizzle(src0, Y, Z, X, ONE),
1072 swizzle(src1, Z, X, Y, ONE),
1073 negate(tmp, 1, 1, 1, 0));
1074 break;
1075
1076 case OPCODE_END:
1077 return;
1078
1079 case OPCODE_BGNLOOP:
1080 case OPCODE_BGNSUB:
1081 case OPCODE_BRA:
1082 case OPCODE_BRK:
1083 case OPCODE_CAL:
1084 case OPCODE_CONT:
1085 case OPCODE_DDX:
1086 case OPCODE_DDY:
1087 case OPCODE_ELSE:
1088 case OPCODE_ENDIF:
1089 case OPCODE_ENDLOOP:
1090 case OPCODE_ENDSUB:
1091 case OPCODE_IF:
1092 case OPCODE_RET:
1093 p->error = 1;
1094 i915_program_error(p, "Unsupported opcode: %s",
1095 _mesa_opcode_string(inst->Opcode));
1096 return;
1097
1098 case OPCODE_EXP:
1099 case OPCODE_LOG:
1100 /* These opcodes are claimed as GLSL, NV_vp, and ARB_vp in
1101 * prog_instruction.h, but apparently GLSL doesn't ever emit them.
1102 * Instead, it translates to EX2 or LG2.
1103 */
1104 case OPCODE_TXD:
1105 case OPCODE_TXL:
1106 /* These opcodes are claimed by GLSL in prog_instruction.h, but
1107 * only NV_vp/fp appears to emit them.
1108 */
1109 default:
1110 i915_program_error(p, "bad opcode: %s",
1111 _mesa_opcode_string(inst->Opcode));
1112 return;
1113 }
1114
1115 inst++;
1116 i915_release_utemps(p);
1117 }
1118 }
1119
1120 /* Rather than trying to intercept and jiggle depth writes during
1121 * emit, just move the value into its correct position at the end of
1122 * the program:
1123 */
1124 static void
1125 fixup_depth_write(struct i915_fragment_program *p)
1126 {
1127 if (p->depth_written) {
1128 GLuint depth = UREG(REG_TYPE_OD, 0);
1129
1130 i915_emit_arith(p,
1131 A0_MOV,
1132 depth, A0_DEST_CHANNEL_W, 0,
1133 swizzle(depth, X, Y, Z, Z), 0, 0);
1134 }
1135 }
1136
1137
1138 static void
1139 check_wpos(struct i915_fragment_program *p)
1140 {
1141 GLuint inputs = p->FragProg.Base.InputsRead;
1142 GLint i;
1143
1144 p->wpos_tex = -1;
1145
1146 for (i = 0; i < p->ctx->Const.MaxTextureCoordUnits; i++) {
1147 if (inputs & (FRAG_BIT_TEX(i) | FRAG_BIT_VAR(i)))
1148 continue;
1149 else if (inputs & FRAG_BIT_WPOS) {
1150 p->wpos_tex = i;
1151 inputs &= ~FRAG_BIT_WPOS;
1152 }
1153 }
1154
1155 if (inputs & FRAG_BIT_WPOS) {
1156 i915_program_error(p, "No free texcoord for wpos value");
1157 }
1158 }
1159
1160
1161 static void
1162 translate_program(struct i915_fragment_program *p)
1163 {
1164 struct i915_context *i915 = I915_CONTEXT(p->ctx);
1165
1166 if (INTEL_DEBUG & DEBUG_WM) {
1167 printf("fp:\n");
1168 _mesa_print_program(&p->FragProg.Base);
1169 printf("\n");
1170 }
1171
1172 i915_init_program(i915, p);
1173 check_wpos(p);
1174 upload_program(p);
1175 fixup_depth_write(p);
1176 i915_fini_program(p);
1177
1178 p->translated = 1;
1179 }
1180
1181
1182 static void
1183 track_params(struct i915_fragment_program *p)
1184 {
1185 GLint i;
1186
1187 if (p->nr_params)
1188 _mesa_load_state_parameters(p->ctx, p->FragProg.Base.Parameters);
1189
1190 for (i = 0; i < p->nr_params; i++) {
1191 GLint reg = p->param[i].reg;
1192 COPY_4V(p->constant[reg], p->param[i].values);
1193 }
1194
1195 p->params_uptodate = 1;
1196 p->on_hardware = 0; /* overkill */
1197 }
1198
1199
1200 static void
1201 i915BindProgram(struct gl_context * ctx, GLenum target, struct gl_program *prog)
1202 {
1203 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1204 struct i915_context *i915 = I915_CONTEXT(ctx);
1205 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1206
1207 if (i915->current_program == p)
1208 return;
1209
1210 if (i915->current_program) {
1211 i915->current_program->on_hardware = 0;
1212 i915->current_program->params_uptodate = 0;
1213 }
1214
1215 i915->current_program = p;
1216
1217 assert(p->on_hardware == 0);
1218 assert(p->params_uptodate == 0);
1219
1220 }
1221 }
1222
1223 static struct gl_program *
1224 i915NewProgram(struct gl_context * ctx, GLenum target, GLuint id)
1225 {
1226 switch (target) {
1227 case GL_VERTEX_PROGRAM_ARB:
1228 return _mesa_init_vertex_program(ctx, CALLOC_STRUCT(gl_vertex_program),
1229 target, id);
1230
1231 case GL_FRAGMENT_PROGRAM_ARB:{
1232 struct i915_fragment_program *prog =
1233 CALLOC_STRUCT(i915_fragment_program);
1234 if (prog) {
1235 i915_init_program(I915_CONTEXT(ctx), prog);
1236
1237 return _mesa_init_fragment_program(ctx, &prog->FragProg,
1238 target, id);
1239 }
1240 else
1241 return NULL;
1242 }
1243
1244 default:
1245 /* Just fallback:
1246 */
1247 return _mesa_new_program(ctx, target, id);
1248 }
1249 }
1250
1251 static void
1252 i915DeleteProgram(struct gl_context * ctx, struct gl_program *prog)
1253 {
1254 if (prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
1255 struct i915_context *i915 = I915_CONTEXT(ctx);
1256 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1257
1258 if (i915->current_program == p)
1259 i915->current_program = 0;
1260 }
1261
1262 _mesa_delete_program(ctx, prog);
1263 }
1264
1265
1266 static GLboolean
1267 i915IsProgramNative(struct gl_context * ctx, GLenum target, struct gl_program *prog)
1268 {
1269 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1270 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1271
1272 if (!p->translated)
1273 translate_program(p);
1274
1275 return !p->error;
1276 }
1277 else
1278 return GL_TRUE;
1279 }
1280
1281 static GLboolean
1282 i915ProgramStringNotify(struct gl_context * ctx,
1283 GLenum target, struct gl_program *prog)
1284 {
1285 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1286 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1287 p->translated = 0;
1288
1289 /* Hack: make sure fog is correctly enabled according to this
1290 * fragment program's fog options.
1291 */
1292 if (p->FragProg.FogOption) {
1293 /* add extra instructions to do fog, then turn off FogOption field */
1294 _mesa_append_fog_code(ctx, &p->FragProg);
1295 p->FragProg.FogOption = GL_NONE;
1296 }
1297 }
1298
1299 (void) _tnl_program_string(ctx, target, prog);
1300
1301 /* XXX check if program is legal, within limits */
1302 return GL_TRUE;
1303 }
1304
1305 void
1306 i915_update_program(struct gl_context *ctx)
1307 {
1308 struct intel_context *intel = intel_context(ctx);
1309 struct i915_context *i915 = i915_context(&intel->ctx);
1310 struct i915_fragment_program *fp =
1311 (struct i915_fragment_program *) ctx->FragmentProgram._Current;
1312
1313 if (i915->current_program != fp) {
1314 if (i915->current_program) {
1315 i915->current_program->on_hardware = 0;
1316 i915->current_program->params_uptodate = 0;
1317 }
1318
1319 i915->current_program = fp;
1320 }
1321
1322 if (!fp->translated)
1323 translate_program(fp);
1324
1325 FALLBACK(&i915->intel, I915_FALLBACK_PROGRAM, fp->error);
1326 }
1327
1328 void
1329 i915ValidateFragmentProgram(struct i915_context *i915)
1330 {
1331 struct gl_context *ctx = &i915->intel.ctx;
1332 struct intel_context *intel = intel_context(ctx);
1333 TNLcontext *tnl = TNL_CONTEXT(ctx);
1334 struct vertex_buffer *VB = &tnl->vb;
1335
1336 struct i915_fragment_program *p =
1337 (struct i915_fragment_program *) ctx->FragmentProgram._Current;
1338
1339 const GLuint inputsRead = p->FragProg.Base.InputsRead;
1340 GLuint s4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_VFMT_MASK;
1341 GLuint s2 = S2_TEXCOORD_NONE;
1342 int i, offset = 0;
1343
1344 /* Important:
1345 */
1346 VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
1347
1348 if (!p->translated)
1349 translate_program(p);
1350
1351 intel->vertex_attr_count = 0;
1352 intel->wpos_offset = 0;
1353 intel->wpos_size = 0;
1354 intel->coloroffset = 0;
1355 intel->specoffset = 0;
1356
1357 if (inputsRead & FRAG_BITS_TEX_ANY) {
1358 EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, S4_VFMT_XYZW, 16);
1359 }
1360 else {
1361 EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_3F_VIEWPORT, S4_VFMT_XYZ, 12);
1362 }
1363
1364 if (inputsRead & FRAG_BIT_COL0) {
1365 intel->coloroffset = offset / 4;
1366 EMIT_ATTR(_TNL_ATTRIB_COLOR0, EMIT_4UB_4F_BGRA, S4_VFMT_COLOR, 4);
1367 }
1368
1369 if (inputsRead & FRAG_BIT_COL1) {
1370 intel->specoffset = offset / 4;
1371 EMIT_ATTR(_TNL_ATTRIB_COLOR1, EMIT_4UB_4F_BGRA, S4_VFMT_SPEC_FOG, 4);
1372 }
1373
1374 if ((inputsRead & FRAG_BIT_FOGC) || i915->vertex_fog != I915_FOG_NONE) {
1375 EMIT_ATTR(_TNL_ATTRIB_FOG, EMIT_1F, S4_VFMT_FOG_PARAM, 4);
1376 }
1377
1378 for (i = 0; i < p->ctx->Const.MaxTextureCoordUnits; i++) {
1379 if (inputsRead & FRAG_BIT_TEX(i)) {
1380 int sz = VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]->size;
1381
1382 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1383 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(sz));
1384
1385 EMIT_ATTR(_TNL_ATTRIB_TEX0 + i, EMIT_SZ(sz), 0, sz * 4);
1386 }
1387 else if (inputsRead & FRAG_BIT_VAR(i)) {
1388 int sz = VB->AttribPtr[_TNL_ATTRIB_GENERIC0 + i]->size;
1389
1390 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1391 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(sz));
1392
1393 EMIT_ATTR(_TNL_ATTRIB_GENERIC0 + i, EMIT_SZ(sz), 0, sz * 4);
1394 }
1395 else if (i == p->wpos_tex) {
1396
1397 /* If WPOS is required, duplicate the XYZ position data in an
1398 * unused texture coordinate:
1399 */
1400 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1401 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(3));
1402
1403 intel->wpos_offset = offset;
1404 intel->wpos_size = 3 * sizeof(GLuint);
1405
1406 EMIT_PAD(intel->wpos_size);
1407 }
1408 }
1409
1410 if (s2 != i915->state.Ctx[I915_CTXREG_LIS2] ||
1411 s4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
1412 int k;
1413
1414 I915_STATECHANGE(i915, I915_UPLOAD_CTX);
1415
1416 /* Must do this *after* statechange, so as not to affect
1417 * buffered vertices reliant on the old state:
1418 */
1419 intel->vertex_size = _tnl_install_attrs(&intel->ctx,
1420 intel->vertex_attrs,
1421 intel->vertex_attr_count,
1422 intel->ViewportMatrix.m, 0);
1423
1424 assert(intel->prim.current_offset == intel->prim.start_offset);
1425 intel->prim.start_offset = (intel->prim.current_offset + intel->vertex_size-1) / intel->vertex_size * intel->vertex_size;
1426 intel->prim.current_offset = intel->prim.start_offset;
1427
1428 intel->vertex_size >>= 2;
1429
1430 i915->state.Ctx[I915_CTXREG_LIS2] = s2;
1431 i915->state.Ctx[I915_CTXREG_LIS4] = s4;
1432
1433 k = intel->vtbl.check_vertex_size(intel, intel->vertex_size);
1434 assert(k);
1435 }
1436
1437 if (!p->params_uptodate)
1438 track_params(p);
1439
1440 if (!p->on_hardware)
1441 i915_upload_program(i915, p);
1442
1443 if (INTEL_DEBUG & DEBUG_WM) {
1444 printf("i915:\n");
1445 i915_disassemble_program(i915->state.Program, i915->state.ProgramSize);
1446 }
1447 }
1448
1449 void
1450 i915InitFragProgFuncs(struct dd_function_table *functions)
1451 {
1452 functions->BindProgram = i915BindProgram;
1453 functions->NewProgram = i915NewProgram;
1454 functions->DeleteProgram = i915DeleteProgram;
1455 functions->IsProgramNative = i915IsProgramNative;
1456 functions->ProgramStringNotify = i915ProgramStringNotify;
1457 }