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Merge branch 'llvm-cliptest-viewport'
[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->ctx->FragmentProgram._Current; \
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->ctx->FragmentProgram._Current;
308 GLuint regsUsed = 0xffff0000;
309 GLint i;
310
311 for (i = program->Base.NumInstructions - 1; i >= 0; i--) {
312 struct prog_instruction *inst = &program->Base.Instructions[i];
313 int opArgs = _mesa_num_inst_src_regs(inst->Opcode);
314 int a;
315
316 /* Register is written to: unmark as live for this and preceeding ops */
317 if (inst->DstReg.File == PROGRAM_TEMPORARY)
318 regsUsed &= ~(1 << inst->DstReg.Index);
319
320 for (a = 0; a < opArgs; a++) {
321 /* Register is read from: mark as live for this and preceeding ops */
322 if (inst->SrcReg[a].File == PROGRAM_TEMPORARY)
323 regsUsed |= 1 << inst->SrcReg[a].Index;
324 }
325
326 p->usedRegs[i] = regsUsed;
327 }
328 }
329
330 static GLuint get_live_regs( struct i915_fragment_program *p,
331 const struct prog_instruction *inst )
332 {
333 const struct gl_fragment_program *program = p->ctx->FragmentProgram._Current;
334 GLuint nr = inst - program->Base.Instructions;
335
336 return p->usedRegs[nr];
337 }
338
339
340 /* Possible concerns:
341 *
342 * SIN, COS -- could use another taylor step?
343 * LIT -- results seem a little different to sw mesa
344 * LOG -- different to mesa on negative numbers, but this is conformant.
345 *
346 * Parse failures -- Mesa doesn't currently give a good indication
347 * internally whether a particular program string parsed or not. This
348 * can lead to confusion -- hopefully we cope with it ok now.
349 *
350 */
351 static void
352 upload_program(struct i915_fragment_program *p)
353 {
354 const struct gl_fragment_program *program =
355 p->ctx->FragmentProgram._Current;
356 const struct prog_instruction *inst = program->Base.Instructions;
357
358 if (INTEL_DEBUG & DEBUG_WM)
359 _mesa_print_program(&program->Base);
360
361 /* Is this a parse-failed program? Ensure a valid program is
362 * loaded, as the flagging of an error isn't sufficient to stop
363 * this being uploaded to hardware.
364 */
365 if (inst[0].Opcode == OPCODE_END) {
366 GLuint tmp = i915_get_utemp(p);
367 i915_emit_arith(p,
368 A0_MOV,
369 UREG(REG_TYPE_OC, 0),
370 A0_DEST_CHANNEL_ALL, 0,
371 swizzle(tmp, ONE, ZERO, ONE, ONE), 0, 0);
372 return;
373 }
374
375 if (program->Base.NumInstructions > I915_MAX_INSN) {
376 i915_program_error(p, "Exceeded max instructions (%d out of %d)",
377 program->Base.NumInstructions, I915_MAX_INSN);
378 return;
379 }
380
381 /* Not always needed:
382 */
383 calc_live_regs(p);
384
385 while (1) {
386 GLuint src0, src1, src2, flags;
387 GLuint tmp = 0, dst, consts0 = 0, consts1 = 0;
388
389 switch (inst->Opcode) {
390 case OPCODE_ABS:
391 src0 = src_vector(p, &inst->SrcReg[0], program);
392 i915_emit_arith(p,
393 A0_MAX,
394 get_result_vector(p, inst),
395 get_result_flags(inst), 0,
396 src0, negate(src0, 1, 1, 1, 1), 0);
397 break;
398
399 case OPCODE_ADD:
400 EMIT_2ARG_ARITH(A0_ADD);
401 break;
402
403 case OPCODE_CMP:
404 src0 = src_vector(p, &inst->SrcReg[0], program);
405 src1 = src_vector(p, &inst->SrcReg[1], program);
406 src2 = src_vector(p, &inst->SrcReg[2], program);
407 i915_emit_arith(p, A0_CMP, get_result_vector(p, inst), get_result_flags(inst), 0, src0, src2, src1); /* NOTE: order of src2, src1 */
408 break;
409
410 case OPCODE_COS:
411 src0 = src_vector(p, &inst->SrcReg[0], program);
412 tmp = i915_get_utemp(p);
413 consts0 = i915_emit_const4fv(p, sin_quad_constants[0]);
414 consts1 = i915_emit_const4fv(p, sin_quad_constants[1]);
415
416 /* Reduce range from repeating about [-pi,pi] to [-1,1] */
417 i915_emit_arith(p,
418 A0_MAD,
419 tmp, A0_DEST_CHANNEL_X, 0,
420 src0,
421 swizzle(consts1, Z, ZERO, ZERO, ZERO), /* 1/(2pi) */
422 swizzle(consts0, W, ZERO, ZERO, ZERO)); /* .75 */
423
424 i915_emit_arith(p, A0_FRC, tmp, A0_DEST_CHANNEL_X, 0, tmp, 0, 0);
425
426 i915_emit_arith(p,
427 A0_MAD,
428 tmp, A0_DEST_CHANNEL_X, 0,
429 tmp,
430 swizzle(consts0, X, ZERO, ZERO, ZERO), /* 2 */
431 swizzle(consts0, Y, ZERO, ZERO, ZERO)); /* -1 */
432
433 /* Compute COS with the same calculation used for SIN, but a
434 * different source range has been mapped to [-1,1] this time.
435 */
436
437 /* tmp.y = abs(tmp.x); {x, abs(x), 0, 0} */
438 i915_emit_arith(p,
439 A0_MAX,
440 tmp, A0_DEST_CHANNEL_Y, 0,
441 swizzle(tmp, ZERO, X, ZERO, ZERO),
442 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
443 0);
444
445 /* tmp.y = tmp.y * tmp.x; {x, x * abs(x), 0, 0} */
446 i915_emit_arith(p,
447 A0_MUL,
448 tmp, A0_DEST_CHANNEL_Y, 0,
449 swizzle(tmp, ZERO, X, ZERO, ZERO),
450 tmp,
451 0);
452
453 /* tmp.x = tmp.xy DP sin_quad_constants[2].xy */
454 i915_emit_arith(p,
455 A0_DP3,
456 tmp, A0_DEST_CHANNEL_X, 0,
457 tmp,
458 swizzle(consts1, X, Y, ZERO, ZERO),
459 0);
460
461 /* tmp.x now contains a first approximation (y). Now, weight it
462 * against tmp.y**2 to get closer.
463 */
464 i915_emit_arith(p,
465 A0_MAX,
466 tmp, A0_DEST_CHANNEL_Y, 0,
467 swizzle(tmp, ZERO, X, ZERO, ZERO),
468 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
469 0);
470
471 /* tmp.y = tmp.x * tmp.y - tmp.x; {y, y * abs(y) - y, 0, 0} */
472 i915_emit_arith(p,
473 A0_MAD,
474 tmp, A0_DEST_CHANNEL_Y, 0,
475 swizzle(tmp, ZERO, X, ZERO, ZERO),
476 swizzle(tmp, ZERO, Y, ZERO, ZERO),
477 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0));
478
479 /* result = .2225 * tmp.y + tmp.x =.2225(y * abs(y) - y) + y= */
480 i915_emit_arith(p,
481 A0_MAD,
482 get_result_vector(p, inst),
483 get_result_flags(inst), 0,
484 swizzle(consts1, W, W, W, W),
485 swizzle(tmp, Y, Y, Y, Y),
486 swizzle(tmp, X, X, X, X));
487 break;
488
489 case OPCODE_DP2:
490 src0 = src_vector(p, &inst->SrcReg[0], program);
491 src1 = src_vector(p, &inst->SrcReg[1], program);
492 i915_emit_arith(p,
493 A0_DP3,
494 get_result_vector(p, inst),
495 get_result_flags(inst), 0,
496 swizzle(src0, X, Y, ZERO, ZERO),
497 swizzle(src1, X, Y, ZERO, ZERO),
498 0);
499 break;
500
501 case OPCODE_DP3:
502 EMIT_2ARG_ARITH(A0_DP3);
503 break;
504
505 case OPCODE_DP4:
506 EMIT_2ARG_ARITH(A0_DP4);
507 break;
508
509 case OPCODE_DPH:
510 src0 = src_vector(p, &inst->SrcReg[0], program);
511 src1 = src_vector(p, &inst->SrcReg[1], program);
512
513 i915_emit_arith(p,
514 A0_DP4,
515 get_result_vector(p, inst),
516 get_result_flags(inst), 0,
517 swizzle(src0, X, Y, Z, ONE), src1, 0);
518 break;
519
520 case OPCODE_DST:
521 src0 = src_vector(p, &inst->SrcReg[0], program);
522 src1 = src_vector(p, &inst->SrcReg[1], program);
523
524 /* result[0] = 1 * 1;
525 * result[1] = a[1] * b[1];
526 * result[2] = a[2] * 1;
527 * result[3] = 1 * b[3];
528 */
529 i915_emit_arith(p,
530 A0_MUL,
531 get_result_vector(p, inst),
532 get_result_flags(inst), 0,
533 swizzle(src0, ONE, Y, Z, ONE),
534 swizzle(src1, ONE, Y, ONE, W), 0);
535 break;
536
537 case OPCODE_EX2:
538 src0 = src_vector(p, &inst->SrcReg[0], program);
539
540 i915_emit_arith(p,
541 A0_EXP,
542 get_result_vector(p, inst),
543 get_result_flags(inst), 0,
544 swizzle(src0, X, X, X, X), 0, 0);
545 break;
546
547 case OPCODE_FLR:
548 EMIT_1ARG_ARITH(A0_FLR);
549 break;
550
551 case OPCODE_TRUNC:
552 EMIT_1ARG_ARITH(A0_TRC);
553 break;
554
555 case OPCODE_FRC:
556 EMIT_1ARG_ARITH(A0_FRC);
557 break;
558
559 case OPCODE_KIL:
560 src0 = src_vector(p, &inst->SrcReg[0], program);
561 tmp = i915_get_utemp(p);
562
563 i915_emit_texld(p, get_live_regs(p, inst),
564 tmp, A0_DEST_CHANNEL_ALL, /* use a dummy dest reg */
565 0, src0, T0_TEXKILL);
566 break;
567
568 case OPCODE_KIL_NV:
569 if (inst->DstReg.CondMask == COND_TR) {
570 tmp = i915_get_utemp(p);
571
572 i915_emit_texld(p, get_live_regs(p, inst),
573 tmp, A0_DEST_CHANNEL_ALL,
574 0, /* use a dummy dest reg */
575 swizzle(tmp, ONE, ONE, ONE, ONE), /* always */
576 T0_TEXKILL);
577 } else {
578 p->error = 1;
579 i915_program_error(p, "Unsupported KIL_NV condition code: %d",
580 inst->DstReg.CondMask);
581 }
582 break;
583
584 case OPCODE_LG2:
585 src0 = src_vector(p, &inst->SrcReg[0], program);
586
587 i915_emit_arith(p,
588 A0_LOG,
589 get_result_vector(p, inst),
590 get_result_flags(inst), 0,
591 swizzle(src0, X, X, X, X), 0, 0);
592 break;
593
594 case OPCODE_LIT:
595 src0 = src_vector(p, &inst->SrcReg[0], program);
596 tmp = i915_get_utemp(p);
597
598 /* tmp = max( a.xyzw, a.00zw )
599 * XXX: Clamp tmp.w to -128..128
600 * tmp.y = log(tmp.y)
601 * tmp.y = tmp.w * tmp.y
602 * tmp.y = exp(tmp.y)
603 * result = cmp (a.11-x1, a.1x01, a.1xy1 )
604 */
605 i915_emit_arith(p, A0_MAX, tmp, A0_DEST_CHANNEL_ALL, 0,
606 src0, swizzle(src0, ZERO, ZERO, Z, W), 0);
607
608 i915_emit_arith(p, A0_LOG, tmp, A0_DEST_CHANNEL_Y, 0,
609 swizzle(tmp, Y, Y, Y, Y), 0, 0);
610
611 i915_emit_arith(p, A0_MUL, tmp, A0_DEST_CHANNEL_Y, 0,
612 swizzle(tmp, ZERO, Y, ZERO, ZERO),
613 swizzle(tmp, ZERO, W, ZERO, ZERO), 0);
614
615 i915_emit_arith(p, A0_EXP, tmp, A0_DEST_CHANNEL_Y, 0,
616 swizzle(tmp, Y, Y, Y, Y), 0, 0);
617
618 i915_emit_arith(p, A0_CMP,
619 get_result_vector(p, inst),
620 get_result_flags(inst), 0,
621 negate(swizzle(tmp, ONE, ONE, X, ONE), 0, 0, 1, 0),
622 swizzle(tmp, ONE, X, ZERO, ONE),
623 swizzle(tmp, ONE, X, Y, ONE));
624
625 break;
626
627 case OPCODE_LRP:
628 src0 = src_vector(p, &inst->SrcReg[0], program);
629 src1 = src_vector(p, &inst->SrcReg[1], program);
630 src2 = src_vector(p, &inst->SrcReg[2], program);
631 flags = get_result_flags(inst);
632 tmp = i915_get_utemp(p);
633
634 /* b*a + c*(1-a)
635 *
636 * b*a + c - ca
637 *
638 * tmp = b*a + c,
639 * result = (-c)*a + tmp
640 */
641 i915_emit_arith(p, A0_MAD, tmp,
642 flags & A0_DEST_CHANNEL_ALL, 0, src1, src0, src2);
643
644 i915_emit_arith(p, A0_MAD,
645 get_result_vector(p, inst),
646 flags, 0, negate(src2, 1, 1, 1, 1), src0, tmp);
647 break;
648
649 case OPCODE_MAD:
650 EMIT_3ARG_ARITH(A0_MAD);
651 break;
652
653 case OPCODE_MAX:
654 EMIT_2ARG_ARITH(A0_MAX);
655 break;
656
657 case OPCODE_MIN:
658 src0 = src_vector(p, &inst->SrcReg[0], program);
659 src1 = src_vector(p, &inst->SrcReg[1], program);
660 tmp = i915_get_utemp(p);
661 flags = get_result_flags(inst);
662
663 i915_emit_arith(p,
664 A0_MAX,
665 tmp, flags & A0_DEST_CHANNEL_ALL, 0,
666 negate(src0, 1, 1, 1, 1),
667 negate(src1, 1, 1, 1, 1), 0);
668
669 i915_emit_arith(p,
670 A0_MOV,
671 get_result_vector(p, inst),
672 flags, 0, negate(tmp, 1, 1, 1, 1), 0, 0);
673 break;
674
675 case OPCODE_MOV:
676 EMIT_1ARG_ARITH(A0_MOV);
677 break;
678
679 case OPCODE_MUL:
680 EMIT_2ARG_ARITH(A0_MUL);
681 break;
682
683 case OPCODE_POW:
684 src0 = src_vector(p, &inst->SrcReg[0], program);
685 src1 = src_vector(p, &inst->SrcReg[1], program);
686 tmp = i915_get_utemp(p);
687 flags = get_result_flags(inst);
688
689 /* XXX: masking on intermediate values, here and elsewhere.
690 */
691 i915_emit_arith(p,
692 A0_LOG,
693 tmp, A0_DEST_CHANNEL_X, 0,
694 swizzle(src0, X, X, X, X), 0, 0);
695
696 i915_emit_arith(p, A0_MUL, tmp, A0_DEST_CHANNEL_X, 0, tmp, src1, 0);
697
698
699 i915_emit_arith(p,
700 A0_EXP,
701 get_result_vector(p, inst),
702 flags, 0, swizzle(tmp, X, X, X, X), 0, 0);
703
704 break;
705
706 case OPCODE_RCP:
707 src0 = src_vector(p, &inst->SrcReg[0], program);
708
709 i915_emit_arith(p,
710 A0_RCP,
711 get_result_vector(p, inst),
712 get_result_flags(inst), 0,
713 swizzle(src0, X, X, X, X), 0, 0);
714 break;
715
716 case OPCODE_RSQ:
717
718 src0 = src_vector(p, &inst->SrcReg[0], program);
719
720 i915_emit_arith(p,
721 A0_RSQ,
722 get_result_vector(p, inst),
723 get_result_flags(inst), 0,
724 swizzle(src0, X, X, X, X), 0, 0);
725 break;
726
727 case OPCODE_SCS:
728 src0 = src_vector(p, &inst->SrcReg[0], program);
729 tmp = i915_get_utemp(p);
730
731 /*
732 * t0.xy = MUL x.xx11, x.x1111 ; x^2, x, 1, 1
733 * t0 = MUL t0.xyxy t0.xx11 ; x^4, x^3, x^2, x
734 * t1 = MUL t0.xyyw t0.yz11 ; x^7 x^5 x^3 x
735 * scs.x = DP4 t1, sin_constants
736 * t1 = MUL t0.xxz1 t0.z111 ; x^6 x^4 x^2 1
737 * scs.y = DP4 t1, cos_constants
738 */
739 i915_emit_arith(p,
740 A0_MUL,
741 tmp, A0_DEST_CHANNEL_XY, 0,
742 swizzle(src0, X, X, ONE, ONE),
743 swizzle(src0, X, ONE, ONE, ONE), 0);
744
745 i915_emit_arith(p,
746 A0_MUL,
747 tmp, A0_DEST_CHANNEL_ALL, 0,
748 swizzle(tmp, X, Y, X, Y),
749 swizzle(tmp, X, X, ONE, ONE), 0);
750
751 if (inst->DstReg.WriteMask & WRITEMASK_Y) {
752 GLuint tmp1;
753
754 if (inst->DstReg.WriteMask & WRITEMASK_X)
755 tmp1 = i915_get_utemp(p);
756 else
757 tmp1 = tmp;
758
759 i915_emit_arith(p,
760 A0_MUL,
761 tmp1, A0_DEST_CHANNEL_ALL, 0,
762 swizzle(tmp, X, Y, Y, W),
763 swizzle(tmp, X, Z, ONE, ONE), 0);
764
765 i915_emit_arith(p,
766 A0_DP4,
767 get_result_vector(p, inst),
768 A0_DEST_CHANNEL_Y, 0,
769 swizzle(tmp1, W, Z, Y, X),
770 i915_emit_const4fv(p, sin_constants), 0);
771 }
772
773 if (inst->DstReg.WriteMask & WRITEMASK_X) {
774 i915_emit_arith(p,
775 A0_MUL,
776 tmp, A0_DEST_CHANNEL_XYZ, 0,
777 swizzle(tmp, X, X, Z, ONE),
778 swizzle(tmp, Z, ONE, ONE, ONE), 0);
779
780 i915_emit_arith(p,
781 A0_DP4,
782 get_result_vector(p, inst),
783 A0_DEST_CHANNEL_X, 0,
784 swizzle(tmp, ONE, Z, Y, X),
785 i915_emit_const4fv(p, cos_constants), 0);
786 }
787 break;
788
789 case OPCODE_SEQ:
790 tmp = i915_get_utemp(p);
791 flags = get_result_flags(inst);
792 dst = get_result_vector(p, inst);
793
794 /* dst = src1 >= src2 */
795 i915_emit_arith(p,
796 A0_SGE,
797 dst,
798 flags, 0,
799 src_vector(p, &inst->SrcReg[0], program),
800 src_vector(p, &inst->SrcReg[1], program),
801 0);
802 /* tmp = src1 <= src2 */
803 i915_emit_arith(p,
804 A0_SGE,
805 tmp,
806 flags, 0,
807 negate(src_vector(p, &inst->SrcReg[0], program),
808 1, 1, 1, 1),
809 negate(src_vector(p, &inst->SrcReg[1], program),
810 1, 1, 1, 1),
811 0);
812 /* dst = tmp && dst */
813 i915_emit_arith(p,
814 A0_MUL,
815 dst,
816 flags, 0,
817 dst,
818 tmp,
819 0);
820 break;
821
822 case OPCODE_SIN:
823 src0 = src_vector(p, &inst->SrcReg[0], program);
824 tmp = i915_get_utemp(p);
825 consts0 = i915_emit_const4fv(p, sin_quad_constants[0]);
826 consts1 = i915_emit_const4fv(p, sin_quad_constants[1]);
827
828 /* Reduce range from repeating about [-pi,pi] to [-1,1] */
829 i915_emit_arith(p,
830 A0_MAD,
831 tmp, A0_DEST_CHANNEL_X, 0,
832 src0,
833 swizzle(consts1, Z, ZERO, ZERO, ZERO), /* 1/(2pi) */
834 swizzle(consts0, Z, ZERO, ZERO, ZERO)); /* .5 */
835
836 i915_emit_arith(p, A0_FRC, tmp, A0_DEST_CHANNEL_X, 0, tmp, 0, 0);
837
838 i915_emit_arith(p,
839 A0_MAD,
840 tmp, A0_DEST_CHANNEL_X, 0,
841 tmp,
842 swizzle(consts0, X, ZERO, ZERO, ZERO), /* 2 */
843 swizzle(consts0, Y, ZERO, ZERO, ZERO)); /* -1 */
844
845 /* Compute sin using a quadratic and quartic. It gives continuity
846 * that repeating the Taylor series lacks every 2*pi, and has
847 * reduced error.
848 *
849 * The idea was described at:
850 * http://www.devmaster.net/forums/showthread.php?t=5784
851 */
852
853 /* tmp.y = abs(tmp.x); {x, abs(x), 0, 0} */
854 i915_emit_arith(p,
855 A0_MAX,
856 tmp, A0_DEST_CHANNEL_Y, 0,
857 swizzle(tmp, ZERO, X, ZERO, ZERO),
858 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
859 0);
860
861 /* tmp.y = tmp.y * tmp.x; {x, x * abs(x), 0, 0} */
862 i915_emit_arith(p,
863 A0_MUL,
864 tmp, A0_DEST_CHANNEL_Y, 0,
865 swizzle(tmp, ZERO, X, ZERO, ZERO),
866 tmp,
867 0);
868
869 /* tmp.x = tmp.xy DP sin_quad_constants[2].xy */
870 i915_emit_arith(p,
871 A0_DP3,
872 tmp, A0_DEST_CHANNEL_X, 0,
873 tmp,
874 swizzle(consts1, X, Y, ZERO, ZERO),
875 0);
876
877 /* tmp.x now contains a first approximation (y). Now, weight it
878 * against tmp.y**2 to get closer.
879 */
880 i915_emit_arith(p,
881 A0_MAX,
882 tmp, A0_DEST_CHANNEL_Y, 0,
883 swizzle(tmp, ZERO, X, ZERO, ZERO),
884 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0),
885 0);
886
887 /* tmp.y = tmp.x * tmp.y - tmp.x; {y, y * abs(y) - y, 0, 0} */
888 i915_emit_arith(p,
889 A0_MAD,
890 tmp, A0_DEST_CHANNEL_Y, 0,
891 swizzle(tmp, ZERO, X, ZERO, ZERO),
892 swizzle(tmp, ZERO, Y, ZERO, ZERO),
893 negate(swizzle(tmp, ZERO, X, ZERO, ZERO), 0, 1, 0, 0));
894
895 /* result = .2225 * tmp.y + tmp.x =.2225(y * abs(y) - y) + y= */
896 i915_emit_arith(p,
897 A0_MAD,
898 get_result_vector(p, inst),
899 get_result_flags(inst), 0,
900 swizzle(consts1, W, W, W, W),
901 swizzle(tmp, Y, Y, Y, Y),
902 swizzle(tmp, X, X, X, X));
903
904 break;
905
906 case OPCODE_SGE:
907 EMIT_2ARG_ARITH(A0_SGE);
908 break;
909
910 case OPCODE_SGT:
911 i915_emit_arith(p,
912 A0_SLT,
913 get_result_vector( p, inst ),
914 get_result_flags( inst ), 0,
915 negate(src_vector( p, &inst->SrcReg[0], program),
916 1, 1, 1, 1),
917 negate(src_vector( p, &inst->SrcReg[1], program),
918 1, 1, 1, 1),
919 0);
920 break;
921
922 case OPCODE_SLE:
923 i915_emit_arith(p,
924 A0_SGE,
925 get_result_vector( p, inst ),
926 get_result_flags( inst ), 0,
927 negate(src_vector( p, &inst->SrcReg[0], program),
928 1, 1, 1, 1),
929 negate(src_vector( p, &inst->SrcReg[1], program),
930 1, 1, 1, 1),
931 0);
932 break;
933
934 case OPCODE_SLT:
935 EMIT_2ARG_ARITH(A0_SLT);
936 break;
937
938 case OPCODE_SNE:
939 tmp = i915_get_utemp(p);
940 flags = get_result_flags(inst);
941 dst = get_result_vector(p, inst);
942
943 /* dst = src1 < src2 */
944 i915_emit_arith(p,
945 A0_SLT,
946 dst,
947 flags, 0,
948 src_vector(p, &inst->SrcReg[0], program),
949 src_vector(p, &inst->SrcReg[1], program),
950 0);
951 /* tmp = src1 > src2 */
952 i915_emit_arith(p,
953 A0_SLT,
954 tmp,
955 flags, 0,
956 negate(src_vector(p, &inst->SrcReg[0], program),
957 1, 1, 1, 1),
958 negate(src_vector(p, &inst->SrcReg[1], program),
959 1, 1, 1, 1),
960 0);
961 /* dst = tmp || dst */
962 i915_emit_arith(p,
963 A0_ADD,
964 dst,
965 flags | A0_DEST_SATURATE, 0,
966 dst,
967 tmp,
968 0);
969 break;
970
971 case OPCODE_SSG:
972 dst = get_result_vector(p, inst);
973 flags = get_result_flags(inst);
974 src0 = src_vector(p, &inst->SrcReg[0], program);
975 tmp = i915_get_utemp(p);
976
977 /* tmp = (src < 0.0) */
978 i915_emit_arith(p,
979 A0_SLT,
980 tmp,
981 flags, 0,
982 src0,
983 swizzle(src0, ZERO, ZERO, ZERO, ZERO),
984 0);
985
986 /* dst = (0.0 < src) */
987 i915_emit_arith(p,
988 A0_SLT,
989 dst,
990 flags, 0,
991 swizzle(src0, ZERO, ZERO, ZERO, ZERO),
992 src0,
993 0);
994
995 /* dst = (src > 0.0) - (src < 0.0) */
996 i915_emit_arith(p,
997 A0_ADD,
998 dst,
999 flags, 0,
1000 dst,
1001 negate(tmp, 1, 1, 1, 1),
1002 0);
1003
1004 break;
1005
1006 case OPCODE_SUB:
1007 src0 = src_vector(p, &inst->SrcReg[0], program);
1008 src1 = src_vector(p, &inst->SrcReg[1], program);
1009
1010 i915_emit_arith(p,
1011 A0_ADD,
1012 get_result_vector(p, inst),
1013 get_result_flags(inst), 0,
1014 src0, negate(src1, 1, 1, 1, 1), 0);
1015 break;
1016
1017 case OPCODE_SWZ:
1018 EMIT_1ARG_ARITH(A0_MOV); /* extended swizzle handled natively */
1019 break;
1020
1021 case OPCODE_TEX:
1022 EMIT_TEX(T0_TEXLD);
1023 break;
1024
1025 case OPCODE_TXB:
1026 EMIT_TEX(T0_TEXLDB);
1027 break;
1028
1029 case OPCODE_TXP:
1030 EMIT_TEX(T0_TEXLDP);
1031 break;
1032
1033 case OPCODE_XPD:
1034 /* Cross product:
1035 * result.x = src0.y * src1.z - src0.z * src1.y;
1036 * result.y = src0.z * src1.x - src0.x * src1.z;
1037 * result.z = src0.x * src1.y - src0.y * src1.x;
1038 * result.w = undef;
1039 */
1040 src0 = src_vector(p, &inst->SrcReg[0], program);
1041 src1 = src_vector(p, &inst->SrcReg[1], program);
1042 tmp = i915_get_utemp(p);
1043
1044 i915_emit_arith(p,
1045 A0_MUL,
1046 tmp, A0_DEST_CHANNEL_ALL, 0,
1047 swizzle(src0, Z, X, Y, ONE),
1048 swizzle(src1, Y, Z, X, ONE), 0);
1049
1050 i915_emit_arith(p,
1051 A0_MAD,
1052 get_result_vector(p, inst),
1053 get_result_flags(inst), 0,
1054 swizzle(src0, Y, Z, X, ONE),
1055 swizzle(src1, Z, X, Y, ONE),
1056 negate(tmp, 1, 1, 1, 0));
1057 break;
1058
1059 case OPCODE_END:
1060 return;
1061
1062 case OPCODE_BGNLOOP:
1063 case OPCODE_BGNSUB:
1064 case OPCODE_BRA:
1065 case OPCODE_BRK:
1066 case OPCODE_CAL:
1067 case OPCODE_CONT:
1068 case OPCODE_DDX:
1069 case OPCODE_DDY:
1070 case OPCODE_ELSE:
1071 case OPCODE_ENDIF:
1072 case OPCODE_ENDLOOP:
1073 case OPCODE_ENDSUB:
1074 case OPCODE_IF:
1075 case OPCODE_RET:
1076 p->error = 1;
1077 i915_program_error(p, "Unsupported opcode: %s",
1078 _mesa_opcode_string(inst->Opcode));
1079 return;
1080
1081 case OPCODE_EXP:
1082 case OPCODE_LOG:
1083 /* These opcodes are claimed as GLSL, NV_vp, and ARB_vp in
1084 * prog_instruction.h, but apparently GLSL doesn't ever emit them.
1085 * Instead, it translates to EX2 or LG2.
1086 */
1087 case OPCODE_TXD:
1088 case OPCODE_TXL:
1089 /* These opcodes are claimed by GLSL in prog_instruction.h, but
1090 * only NV_vp/fp appears to emit them.
1091 */
1092 default:
1093 i915_program_error(p, "bad opcode: %s",
1094 _mesa_opcode_string(inst->Opcode));
1095 return;
1096 }
1097
1098 inst++;
1099 i915_release_utemps(p);
1100 }
1101 }
1102
1103 /* Rather than trying to intercept and jiggle depth writes during
1104 * emit, just move the value into its correct position at the end of
1105 * the program:
1106 */
1107 static void
1108 fixup_depth_write(struct i915_fragment_program *p)
1109 {
1110 if (p->depth_written) {
1111 GLuint depth = UREG(REG_TYPE_OD, 0);
1112
1113 i915_emit_arith(p,
1114 A0_MOV,
1115 depth, A0_DEST_CHANNEL_W, 0,
1116 swizzle(depth, X, Y, Z, Z), 0, 0);
1117 }
1118 }
1119
1120
1121 static void
1122 check_wpos(struct i915_fragment_program *p)
1123 {
1124 GLuint inputs = p->FragProg.Base.InputsRead;
1125 GLint i;
1126
1127 p->wpos_tex = -1;
1128
1129 for (i = 0; i < p->ctx->Const.MaxTextureCoordUnits; i++) {
1130 if (inputs & (FRAG_BIT_TEX(i) | FRAG_BIT_VAR(i)))
1131 continue;
1132 else if (inputs & FRAG_BIT_WPOS) {
1133 p->wpos_tex = i;
1134 inputs &= ~FRAG_BIT_WPOS;
1135 }
1136 }
1137
1138 if (inputs & FRAG_BIT_WPOS) {
1139 i915_program_error(p, "No free texcoord for wpos value");
1140 }
1141 }
1142
1143
1144 static void
1145 translate_program(struct i915_fragment_program *p)
1146 {
1147 struct i915_context *i915 = I915_CONTEXT(p->ctx);
1148
1149 if (INTEL_DEBUG & DEBUG_WM) {
1150 printf("fp:\n");
1151 _mesa_print_program(&p->ctx->FragmentProgram._Current->Base);
1152 printf("\n");
1153 }
1154
1155 i915_init_program(i915, p);
1156 check_wpos(p);
1157 upload_program(p);
1158 fixup_depth_write(p);
1159 i915_fini_program(p);
1160
1161 if (INTEL_DEBUG & DEBUG_WM) {
1162 printf("i915:\n");
1163 i915_disassemble_program(i915->state.Program, i915->state.ProgramSize);
1164 }
1165
1166 p->translated = 1;
1167 }
1168
1169
1170 static void
1171 track_params(struct i915_fragment_program *p)
1172 {
1173 GLint i;
1174
1175 if (p->nr_params)
1176 _mesa_load_state_parameters(p->ctx, p->FragProg.Base.Parameters);
1177
1178 for (i = 0; i < p->nr_params; i++) {
1179 GLint reg = p->param[i].reg;
1180 COPY_4V(p->constant[reg], p->param[i].values);
1181 }
1182
1183 p->params_uptodate = 1;
1184 p->on_hardware = 0; /* overkill */
1185 }
1186
1187
1188 static void
1189 i915BindProgram(struct gl_context * ctx, GLenum target, struct gl_program *prog)
1190 {
1191 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1192 struct i915_context *i915 = I915_CONTEXT(ctx);
1193 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1194
1195 if (i915->current_program == p)
1196 return;
1197
1198 if (i915->current_program) {
1199 i915->current_program->on_hardware = 0;
1200 i915->current_program->params_uptodate = 0;
1201 }
1202
1203 i915->current_program = p;
1204
1205 assert(p->on_hardware == 0);
1206 assert(p->params_uptodate == 0);
1207
1208 }
1209 }
1210
1211 static struct gl_program *
1212 i915NewProgram(struct gl_context * ctx, GLenum target, GLuint id)
1213 {
1214 switch (target) {
1215 case GL_VERTEX_PROGRAM_ARB:
1216 return _mesa_init_vertex_program(ctx, CALLOC_STRUCT(gl_vertex_program),
1217 target, id);
1218
1219 case GL_FRAGMENT_PROGRAM_ARB:{
1220 struct i915_fragment_program *prog =
1221 CALLOC_STRUCT(i915_fragment_program);
1222 if (prog) {
1223 i915_init_program(I915_CONTEXT(ctx), prog);
1224
1225 return _mesa_init_fragment_program(ctx, &prog->FragProg,
1226 target, id);
1227 }
1228 else
1229 return NULL;
1230 }
1231
1232 default:
1233 /* Just fallback:
1234 */
1235 return _mesa_new_program(ctx, target, id);
1236 }
1237 }
1238
1239 static void
1240 i915DeleteProgram(struct gl_context * ctx, struct gl_program *prog)
1241 {
1242 if (prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
1243 struct i915_context *i915 = I915_CONTEXT(ctx);
1244 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1245
1246 if (i915->current_program == p)
1247 i915->current_program = 0;
1248 }
1249
1250 _mesa_delete_program(ctx, prog);
1251 }
1252
1253
1254 static GLboolean
1255 i915IsProgramNative(struct gl_context * ctx, GLenum target, struct gl_program *prog)
1256 {
1257 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1258 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1259
1260 if (!p->translated)
1261 translate_program(p);
1262
1263 return !p->error;
1264 }
1265 else
1266 return GL_TRUE;
1267 }
1268
1269 static GLboolean
1270 i915ProgramStringNotify(struct gl_context * ctx,
1271 GLenum target, struct gl_program *prog)
1272 {
1273 if (target == GL_FRAGMENT_PROGRAM_ARB) {
1274 struct i915_fragment_program *p = (struct i915_fragment_program *) prog;
1275 p->translated = 0;
1276
1277 /* Hack: make sure fog is correctly enabled according to this
1278 * fragment program's fog options.
1279 */
1280 if (p->FragProg.FogOption) {
1281 /* add extra instructions to do fog, then turn off FogOption field */
1282 _mesa_append_fog_code(ctx, &p->FragProg);
1283 p->FragProg.FogOption = GL_NONE;
1284 }
1285 }
1286
1287 (void) _tnl_program_string(ctx, target, prog);
1288
1289 /* XXX check if program is legal, within limits */
1290 return GL_TRUE;
1291 }
1292
1293 void
1294 i915_update_program(struct gl_context *ctx)
1295 {
1296 struct intel_context *intel = intel_context(ctx);
1297 struct i915_context *i915 = i915_context(&intel->ctx);
1298 struct i915_fragment_program *fp =
1299 (struct i915_fragment_program *) ctx->FragmentProgram._Current;
1300
1301 if (i915->current_program != fp) {
1302 if (i915->current_program) {
1303 i915->current_program->on_hardware = 0;
1304 i915->current_program->params_uptodate = 0;
1305 }
1306
1307 i915->current_program = fp;
1308 }
1309
1310 if (!fp->translated)
1311 translate_program(fp);
1312
1313 FALLBACK(&i915->intel, I915_FALLBACK_PROGRAM, fp->error);
1314 }
1315
1316 void
1317 i915ValidateFragmentProgram(struct i915_context *i915)
1318 {
1319 struct gl_context *ctx = &i915->intel.ctx;
1320 struct intel_context *intel = intel_context(ctx);
1321 TNLcontext *tnl = TNL_CONTEXT(ctx);
1322 struct vertex_buffer *VB = &tnl->vb;
1323
1324 struct i915_fragment_program *p =
1325 (struct i915_fragment_program *) ctx->FragmentProgram._Current;
1326
1327 const GLuint inputsRead = p->FragProg.Base.InputsRead;
1328 GLuint s4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_VFMT_MASK;
1329 GLuint s2 = S2_TEXCOORD_NONE;
1330 int i, offset = 0;
1331
1332 /* Important:
1333 */
1334 VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
1335
1336 if (!p->translated)
1337 translate_program(p);
1338
1339 intel->vertex_attr_count = 0;
1340 intel->wpos_offset = 0;
1341 intel->wpos_size = 0;
1342 intel->coloroffset = 0;
1343 intel->specoffset = 0;
1344
1345 if (inputsRead & FRAG_BITS_TEX_ANY) {
1346 EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, S4_VFMT_XYZW, 16);
1347 }
1348 else {
1349 EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_3F_VIEWPORT, S4_VFMT_XYZ, 12);
1350 }
1351
1352 if (inputsRead & FRAG_BIT_COL0) {
1353 intel->coloroffset = offset / 4;
1354 EMIT_ATTR(_TNL_ATTRIB_COLOR0, EMIT_4UB_4F_BGRA, S4_VFMT_COLOR, 4);
1355 }
1356
1357 if (inputsRead & FRAG_BIT_COL1) {
1358 intel->specoffset = offset / 4;
1359 EMIT_ATTR(_TNL_ATTRIB_COLOR1, EMIT_4UB_4F_BGRA, S4_VFMT_SPEC_FOG, 4);
1360 }
1361
1362 if ((inputsRead & FRAG_BIT_FOGC) || i915->vertex_fog != I915_FOG_NONE) {
1363 EMIT_ATTR(_TNL_ATTRIB_FOG, EMIT_1F, S4_VFMT_FOG_PARAM, 4);
1364 }
1365
1366 for (i = 0; i < p->ctx->Const.MaxTextureCoordUnits; i++) {
1367 if (inputsRead & FRAG_BIT_TEX(i)) {
1368 int sz = VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]->size;
1369
1370 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1371 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(sz));
1372
1373 EMIT_ATTR(_TNL_ATTRIB_TEX0 + i, EMIT_SZ(sz), 0, sz * 4);
1374 }
1375 else if (inputsRead & FRAG_BIT_VAR(i)) {
1376 int sz = VB->AttribPtr[_TNL_ATTRIB_GENERIC0 + i]->size;
1377
1378 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1379 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(sz));
1380
1381 EMIT_ATTR(_TNL_ATTRIB_GENERIC0 + i, EMIT_SZ(sz), 0, sz * 4);
1382 }
1383 else if (i == p->wpos_tex) {
1384
1385 /* If WPOS is required, duplicate the XYZ position data in an
1386 * unused texture coordinate:
1387 */
1388 s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
1389 s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(3));
1390
1391 intel->wpos_offset = offset;
1392 intel->wpos_size = 3 * sizeof(GLuint);
1393
1394 EMIT_PAD(intel->wpos_size);
1395 }
1396 }
1397
1398 if (s2 != i915->state.Ctx[I915_CTXREG_LIS2] ||
1399 s4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
1400 int k;
1401
1402 I915_STATECHANGE(i915, I915_UPLOAD_CTX);
1403
1404 /* Must do this *after* statechange, so as not to affect
1405 * buffered vertices reliant on the old state:
1406 */
1407 intel->vertex_size = _tnl_install_attrs(&intel->ctx,
1408 intel->vertex_attrs,
1409 intel->vertex_attr_count,
1410 intel->ViewportMatrix.m, 0);
1411
1412 intel->vertex_size >>= 2;
1413
1414 i915->state.Ctx[I915_CTXREG_LIS2] = s2;
1415 i915->state.Ctx[I915_CTXREG_LIS4] = s4;
1416
1417 k = intel->vtbl.check_vertex_size(intel, intel->vertex_size);
1418 assert(k);
1419 }
1420
1421 if (!p->params_uptodate)
1422 track_params(p);
1423
1424 if (!p->on_hardware)
1425 i915_upload_program(i915, p);
1426 }
1427
1428 void
1429 i915InitFragProgFuncs(struct dd_function_table *functions)
1430 {
1431 functions->BindProgram = i915BindProgram;
1432 functions->NewProgram = i915NewProgram;
1433 functions->DeleteProgram = i915DeleteProgram;
1434 functions->IsProgramNative = i915IsProgramNative;
1435 functions->ProgramStringNotify = i915ProgramStringNotify;
1436 }