1 /*
2 * Copyright (C) 2016 Miklós Máté
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23 #include "main/mtypes.h"
24 #include "main/atifragshader.h"
25 #include "main/errors.h"
26 #include "program/prog_parameter.h"
27
28 #include "tgsi/tgsi_ureg.h"
29 #include "tgsi/tgsi_scan.h"
30 #include "tgsi/tgsi_transform.h"
31
32 #include "st_program.h"
33 #include "st_atifs_to_tgsi.h"
34
35 /**
36 * Intermediate state used during shader translation.
37 */
38 struct st_translate {
39 struct ureg_program *ureg;
40 struct ati_fragment_shader *atifs;
41
42 struct ureg_dst temps[MAX_PROGRAM_TEMPS];
43 struct ureg_src *constants;
44 struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS];
45 struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
46 struct ureg_src samplers[PIPE_MAX_SAMPLERS];
47
48 const ubyte *inputMapping;
49 const ubyte *outputMapping;
50
51 unsigned current_pass;
52
53 bool regs_written[MAX_NUM_PASSES_ATI][MAX_NUM_FRAGMENT_REGISTERS_ATI];
54
55 boolean error;
56 };
57
58 struct instruction_desc {
59 unsigned TGSI_opcode;
60 const char *name;
61 unsigned char arg_count;
62 };
63
64 static const struct instruction_desc inst_desc[] = {
65 {TGSI_OPCODE_MOV, "MOV", 1},
66 {TGSI_OPCODE_NOP, "UND", 0}, /* unused */
67 {TGSI_OPCODE_ADD, "ADD", 2},
68 {TGSI_OPCODE_MUL, "MUL", 2},
69 {TGSI_OPCODE_NOP, "SUB", 2},
70 {TGSI_OPCODE_DP3, "DOT3", 2},
71 {TGSI_OPCODE_DP4, "DOT4", 2},
72 {TGSI_OPCODE_MAD, "MAD", 3},
73 {TGSI_OPCODE_LRP, "LERP", 3},
74 {TGSI_OPCODE_NOP, "CND", 3},
75 {TGSI_OPCODE_NOP, "CND0", 3},
76 {TGSI_OPCODE_NOP, "DOT2_ADD", 3}
77 };
78
79 static struct ureg_dst
get_temp(struct st_translate * t,unsigned index)80 get_temp(struct st_translate *t, unsigned index)
81 {
82 if (ureg_dst_is_undef(t->temps[index]))
83 t->temps[index] = ureg_DECL_temporary(t->ureg);
84 return t->temps[index];
85 }
86
87 static struct ureg_src
apply_swizzle(struct st_translate * t,struct ureg_src src,GLuint swizzle)88 apply_swizzle(struct st_translate *t,
89 struct ureg_src src, GLuint swizzle)
90 {
91 if (swizzle == GL_SWIZZLE_STR_ATI) {
92 return src;
93 } else if (swizzle == GL_SWIZZLE_STQ_ATI) {
94 return ureg_swizzle(src,
95 TGSI_SWIZZLE_X,
96 TGSI_SWIZZLE_Y,
97 TGSI_SWIZZLE_W,
98 TGSI_SWIZZLE_Z);
99 } else {
100 struct ureg_dst tmp[2];
101 struct ureg_src imm[3];
102
103 tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
104 tmp[1] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + 1);
105 imm[0] = src;
106 imm[1] = ureg_imm4f(t->ureg, 1.0f, 1.0f, 0.0f, 0.0f);
107 imm[2] = ureg_imm4f(t->ureg, 0.0f, 0.0f, 1.0f, 1.0f);
108 ureg_insn(t->ureg, TGSI_OPCODE_MAD, &tmp[0], 1, imm, 3, 0);
109
110 if (swizzle == GL_SWIZZLE_STR_DR_ATI) {
111 imm[0] = ureg_scalar(src, TGSI_SWIZZLE_Z);
112 } else {
113 imm[0] = ureg_scalar(src, TGSI_SWIZZLE_W);
114 }
115 ureg_insn(t->ureg, TGSI_OPCODE_RCP, &tmp[1], 1, &imm[0], 1, 0);
116
117 imm[0] = ureg_src(tmp[0]);
118 imm[1] = ureg_src(tmp[1]);
119 ureg_insn(t->ureg, TGSI_OPCODE_MUL, &tmp[0], 1, imm, 2, 0);
120
121 return ureg_src(tmp[0]);
122 }
123 }
124
125 static struct ureg_src
get_source(struct st_translate * t,GLuint src_type)126 get_source(struct st_translate *t, GLuint src_type)
127 {
128 if (src_type >= GL_REG_0_ATI && src_type <= GL_REG_5_ATI) {
129 if (t->regs_written[t->current_pass][src_type - GL_REG_0_ATI]) {
130 return ureg_src(get_temp(t, src_type - GL_REG_0_ATI));
131 } else {
132 return ureg_imm1f(t->ureg, 0.0f);
133 }
134 } else if (src_type >= GL_CON_0_ATI && src_type <= GL_CON_7_ATI) {
135 return t->constants[src_type - GL_CON_0_ATI];
136 } else if (src_type == GL_ZERO) {
137 return ureg_imm1f(t->ureg, 0.0f);
138 } else if (src_type == GL_ONE) {
139 return ureg_imm1f(t->ureg, 1.0f);
140 } else if (src_type == GL_PRIMARY_COLOR_ARB) {
141 return t->inputs[t->inputMapping[VARYING_SLOT_COL0]];
142 } else if (src_type == GL_SECONDARY_INTERPOLATOR_ATI) {
143 return t->inputs[t->inputMapping[VARYING_SLOT_COL1]];
144 } else {
145 /* frontend prevents this */
146 unreachable("unknown source");
147 }
148 }
149
150 static struct ureg_src
prepare_argument(struct st_translate * t,const unsigned argId,const struct atifragshader_src_register * srcReg)151 prepare_argument(struct st_translate *t, const unsigned argId,
152 const struct atifragshader_src_register *srcReg)
153 {
154 struct ureg_src src = get_source(t, srcReg->Index);
155 struct ureg_dst arg = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + argId);
156
157 switch (srcReg->argRep) {
158 case GL_NONE:
159 break;
160 case GL_RED:
161 src = ureg_scalar(src, TGSI_SWIZZLE_X);
162 break;
163 case GL_GREEN:
164 src = ureg_scalar(src, TGSI_SWIZZLE_Y);
165 break;
166 case GL_BLUE:
167 src = ureg_scalar(src, TGSI_SWIZZLE_Z);
168 break;
169 case GL_ALPHA:
170 src = ureg_scalar(src, TGSI_SWIZZLE_W);
171 break;
172 }
173 ureg_insn(t->ureg, TGSI_OPCODE_MOV, &arg, 1, &src, 1, 0);
174
175 if (srcReg->argMod & GL_COMP_BIT_ATI) {
176 struct ureg_src modsrc[2];
177 modsrc[0] = ureg_imm1f(t->ureg, 1.0f);
178 modsrc[1] = ureg_negate(ureg_src(arg));
179
180 ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
181 }
182 if (srcReg->argMod & GL_BIAS_BIT_ATI) {
183 struct ureg_src modsrc[2];
184 modsrc[0] = ureg_src(arg);
185 modsrc[1] = ureg_imm1f(t->ureg, -0.5f);
186
187 ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
188 }
189 if (srcReg->argMod & GL_2X_BIT_ATI) {
190 struct ureg_src modsrc[2];
191 modsrc[0] = ureg_src(arg);
192 modsrc[1] = ureg_src(arg);
193
194 ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
195 }
196 if (srcReg->argMod & GL_NEGATE_BIT_ATI) {
197 struct ureg_src modsrc[2];
198 modsrc[0] = ureg_src(arg);
199 modsrc[1] = ureg_imm1f(t->ureg, -1.0f);
200
201 ureg_insn(t->ureg, TGSI_OPCODE_MUL, &arg, 1, modsrc, 2, 0);
202 }
203 return ureg_src(arg);
204 }
205
206 /* These instructions need special treatment */
207 static void
emit_special_inst(struct st_translate * t,const struct instruction_desc * desc,struct ureg_dst * dst,struct ureg_src * args,unsigned argcount)208 emit_special_inst(struct st_translate *t, const struct instruction_desc *desc,
209 struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
210 {
211 struct ureg_dst tmp[1];
212 struct ureg_src src[3];
213
214 if (!strcmp(desc->name, "SUB")) {
215 ureg_ADD(t->ureg, *dst, args[0], ureg_negate(args[1]));
216 } else if (!strcmp(desc->name, "CND")) {
217 tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + 2); /* re-purpose a3 */
218 src[0] = ureg_imm1f(t->ureg, 0.5f);
219 src[1] = ureg_negate(args[2]);
220 ureg_insn(t->ureg, TGSI_OPCODE_ADD, tmp, 1, src, 2, 0);
221 src[0] = ureg_src(tmp[0]);
222 src[1] = args[0];
223 src[2] = args[1];
224 ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3, 0);
225 } else if (!strcmp(desc->name, "CND0")) {
226 src[0] = args[2];
227 src[1] = args[1];
228 src[2] = args[0];
229 ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3, 0);
230 } else if (!strcmp(desc->name, "DOT2_ADD")) {
231 tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI); /* re-purpose a1 */
232 src[0] = args[0];
233 src[1] = args[1];
234 ureg_insn(t->ureg, TGSI_OPCODE_DP2, tmp, 1, src, 2, 0);
235 src[0] = ureg_src(tmp[0]);
236 src[1] = ureg_scalar(args[2], TGSI_SWIZZLE_Z);
237 ureg_insn(t->ureg, TGSI_OPCODE_ADD, dst, 1, src, 2, 0);
238 }
239 }
240
241 static void
emit_arith_inst(struct st_translate * t,const struct instruction_desc * desc,struct ureg_dst * dst,struct ureg_src * args,unsigned argcount)242 emit_arith_inst(struct st_translate *t,
243 const struct instruction_desc *desc,
244 struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
245 {
246 if (desc->TGSI_opcode == TGSI_OPCODE_NOP) {
247 emit_special_inst(t, desc, dst, args, argcount);
248 return;
249 }
250
251 ureg_insn(t->ureg, desc->TGSI_opcode, dst, 1, args, argcount, 0);
252 }
253
254 static void
emit_dstmod(struct st_translate * t,struct ureg_dst dst,GLuint dstMod)255 emit_dstmod(struct st_translate *t,
256 struct ureg_dst dst, GLuint dstMod)
257 {
258 float imm;
259 struct ureg_src src[3];
260 GLuint scale = dstMod & ~GL_SATURATE_BIT_ATI;
261
262 if (dstMod == GL_NONE) {
263 return;
264 }
265
266 switch (scale) {
267 case GL_2X_BIT_ATI:
268 imm = 2.0f;
269 break;
270 case GL_4X_BIT_ATI:
271 imm = 4.0f;
272 break;
273 case GL_8X_BIT_ATI:
274 imm = 8.0f;
275 break;
276 case GL_HALF_BIT_ATI:
277 imm = 0.5f;
278 break;
279 case GL_QUARTER_BIT_ATI:
280 imm = 0.25f;
281 break;
282 case GL_EIGHTH_BIT_ATI:
283 imm = 0.125f;
284 break;
285 default:
286 imm = 1.0f;
287 }
288
289 src[0] = ureg_src(dst);
290 src[1] = ureg_imm1f(t->ureg, imm);
291 if (dstMod & GL_SATURATE_BIT_ATI) {
292 dst = ureg_saturate(dst);
293 }
294 ureg_insn(t->ureg, TGSI_OPCODE_MUL, &dst, 1, src, 2, 0);
295 }
296
297 /**
298 * Compile one setup instruction to TGSI instructions.
299 */
300 static void
compile_setupinst(struct st_translate * t,const unsigned r,const struct atifs_setupinst * texinst)301 compile_setupinst(struct st_translate *t,
302 const unsigned r,
303 const struct atifs_setupinst *texinst)
304 {
305 struct ureg_dst dst[1];
306 struct ureg_src src[2];
307
308 if (!texinst->Opcode)
309 return;
310
311 dst[0] = get_temp(t, r);
312
313 GLuint pass_tex = texinst->src;
314
315 if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
316 unsigned attr = pass_tex - GL_TEXTURE0_ARB + VARYING_SLOT_TEX0;
317
318 src[0] = t->inputs[t->inputMapping[attr]];
319 } else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {
320 unsigned reg = pass_tex - GL_REG_0_ATI;
321
322 /* the frontend already validated that REG is only allowed in second pass */
323 if (t->regs_written[0][reg]) {
324 src[0] = ureg_src(t->temps[reg]);
325 } else {
326 src[0] = ureg_imm1f(t->ureg, 0.0f);
327 }
328 }
329 src[0] = apply_swizzle(t, src[0], texinst->swizzle);
330
331 if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
332 /* by default texture and sampler indexes are the same */
333 src[1] = t->samplers[r];
334 /* the texture target is still unknown, it will be fixed in the draw call */
335 ureg_tex_insn(t->ureg, TGSI_OPCODE_TEX, dst, 1, TGSI_TEXTURE_2D,
336 TGSI_RETURN_TYPE_FLOAT, NULL, 0, src, 2);
337 } else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
338 ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1, 0);
339 }
340
341 t->regs_written[t->current_pass][r] = true;
342 }
343
344 /**
345 * Compile one arithmetic operation COLOR&ALPHA pair into TGSI instructions.
346 */
347 static void
compile_instruction(struct st_translate * t,const struct atifs_instruction * inst)348 compile_instruction(struct st_translate *t,
349 const struct atifs_instruction *inst)
350 {
351 unsigned optype;
352
353 for (optype = 0; optype < 2; optype++) { /* color, alpha */
354 const struct instruction_desc *desc;
355 struct ureg_dst dst[1];
356 struct ureg_src args[3]; /* arguments for the main operation */
357 unsigned arg;
358 unsigned dstreg = inst->DstReg[optype].Index - GL_REG_0_ATI;
359
360 if (!inst->Opcode[optype])
361 continue;
362
363 desc = &inst_desc[inst->Opcode[optype] - GL_MOV_ATI];
364
365 /* prepare the arguments */
366 for (arg = 0; arg < desc->arg_count; arg++) {
367 if (arg >= inst->ArgCount[optype]) {
368 _mesa_warning(0, "Using 0 for missing argument %d of %s\n",
369 arg, desc->name);
370 args[arg] = ureg_imm1f(t->ureg, 0.0f);
371 } else {
372 args[arg] = prepare_argument(t, arg,
373 &inst->SrcReg[optype][arg]);
374 }
375 }
376
377 /* prepare dst */
378 dst[0] = get_temp(t, dstreg);
379
380 if (optype) {
381 dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_W);
382 } else {
383 GLuint dstMask = inst->DstReg[optype].dstMask;
384 if (dstMask == GL_NONE) {
385 dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XYZ);
386 } else {
387 dst[0] = ureg_writemask(dst[0], dstMask); /* the enum values match */
388 }
389 }
390
391 /* emit the main instruction */
392 emit_arith_inst(t, desc, dst, args, arg);
393
394 emit_dstmod(t, *dst, inst->DstReg[optype].dstMod);
395
396 t->regs_written[t->current_pass][dstreg] = true;
397 }
398 }
399
400 static void
finalize_shader(struct st_translate * t,unsigned numPasses)401 finalize_shader(struct st_translate *t, unsigned numPasses)
402 {
403 struct ureg_dst dst[1] = { { 0 } };
404 struct ureg_src src[1] = { { 0 } };
405
406 if (t->regs_written[numPasses-1][0]) {
407 /* copy the result into the OUT slot */
408 dst[0] = t->outputs[t->outputMapping[FRAG_RESULT_COLOR]];
409 src[0] = ureg_src(t->temps[0]);
410 ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1, 0);
411 }
412
413 /* signal the end of the program */
414 ureg_insn(t->ureg, TGSI_OPCODE_END, dst, 0, src, 0, 0);
415 }
416
417 /**
418 * Called when a new variant is needed, we need to translate
419 * the ATI fragment shader to TGSI
420 */
421 enum pipe_error
st_translate_atifs_program(struct ureg_program * ureg,struct ati_fragment_shader * atifs,struct gl_program * program,GLuint numInputs,const ubyte inputMapping[],const ubyte inputSemanticName[],const ubyte inputSemanticIndex[],const ubyte interpMode[],GLuint numOutputs,const ubyte outputMapping[],const ubyte outputSemanticName[],const ubyte outputSemanticIndex[])422 st_translate_atifs_program(
423 struct ureg_program *ureg,
424 struct ati_fragment_shader *atifs,
425 struct gl_program *program,
426 GLuint numInputs,
427 const ubyte inputMapping[],
428 const ubyte inputSemanticName[],
429 const ubyte inputSemanticIndex[],
430 const ubyte interpMode[],
431 GLuint numOutputs,
432 const ubyte outputMapping[],
433 const ubyte outputSemanticName[],
434 const ubyte outputSemanticIndex[])
435 {
436 enum pipe_error ret = PIPE_OK;
437
438 unsigned pass, i, r;
439
440 struct st_translate translate, *t;
441 t = &translate;
442 memset(t, 0, sizeof *t);
443
444 t->inputMapping = inputMapping;
445 t->outputMapping = outputMapping;
446 t->ureg = ureg;
447 t->atifs = atifs;
448
449 /*
450 * Declare input attributes.
451 */
452 for (i = 0; i < numInputs; i++) {
453 t->inputs[i] = ureg_DECL_fs_input(ureg,
454 inputSemanticName[i],
455 inputSemanticIndex[i],
456 interpMode[i]);
457 }
458
459 /*
460 * Declare output attributes:
461 * we always have numOutputs=1 and it's FRAG_RESULT_COLOR
462 */
463 t->outputs[0] = ureg_DECL_output(ureg,
464 TGSI_SEMANTIC_COLOR,
465 outputSemanticIndex[0]);
466
467 /* Emit constants and immediates. Mesa uses a single index space
468 * for these, so we put all the translated regs in t->constants.
469 */
470 if (program->Parameters) {
471 t->constants = calloc(program->Parameters->NumParameters,
472 sizeof t->constants[0]);
473 if (t->constants == NULL) {
474 ret = PIPE_ERROR_OUT_OF_MEMORY;
475 goto out;
476 }
477
478 for (i = 0; i < program->Parameters->NumParameters; i++) {
479 switch (program->Parameters->Parameters[i].Type) {
480 case PROGRAM_STATE_VAR:
481 case PROGRAM_UNIFORM:
482 t->constants[i] = ureg_DECL_constant(ureg, i);
483 break;
484 case PROGRAM_CONSTANT:
485 t->constants[i] =
486 ureg_DECL_immediate(ureg,
487 (const float*)program->Parameters->ParameterValues[i],
488 4);
489 break;
490 default:
491 break;
492 }
493 }
494 }
495
496 /* texture samplers */
497 for (i = 0; i < MAX_NUM_FRAGMENT_REGISTERS_ATI; i++) {
498 if (program->SamplersUsed & (1 << i)) {
499 t->samplers[i] = ureg_DECL_sampler(ureg, i);
500 /* the texture target is still unknown, it will be fixed in the draw call */
501 ureg_DECL_sampler_view(ureg, i, TGSI_TEXTURE_2D,
502 TGSI_RETURN_TYPE_FLOAT,
503 TGSI_RETURN_TYPE_FLOAT,
504 TGSI_RETURN_TYPE_FLOAT,
505 TGSI_RETURN_TYPE_FLOAT);
506 }
507 }
508
509 /* emit instructions */
510 for (pass = 0; pass < atifs->NumPasses; pass++) {
511 t->current_pass = pass;
512 for (r = 0; r < MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
513 struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
514 compile_setupinst(t, r, texinst);
515 }
516 for (i = 0; i < atifs->numArithInstr[pass]; i++) {
517 struct atifs_instruction *inst = &atifs->Instructions[pass][i];
518 compile_instruction(t, inst);
519 }
520 }
521
522 finalize_shader(t, atifs->NumPasses);
523
524 out:
525 free(t->constants);
526
527 if (t->error) {
528 debug_printf("%s: translate error flag set\n", __func__);
529 }
530
531 return ret;
532 }
533
534 /**
535 * Called in ProgramStringNotify, we need to fill the metadata of the
536 * gl_program attached to the ati_fragment_shader
537 */
538 void
st_init_atifs_prog(struct gl_context * ctx,struct gl_program * prog)539 st_init_atifs_prog(struct gl_context *ctx, struct gl_program *prog)
540 {
541 /* we know this is st_fragment_program, because of st_new_ati_fs() */
542 struct st_fragment_program *stfp = (struct st_fragment_program *) prog;
543 struct ati_fragment_shader *atifs = stfp->ati_fs;
544
545 unsigned pass, i, r, optype, arg;
546
547 static const gl_state_index fog_params_state[STATE_LENGTH] =
548 {STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0};
549 static const gl_state_index fog_color[STATE_LENGTH] =
550 {STATE_FOG_COLOR, 0, 0, 0, 0};
551
552 prog->info.inputs_read = 0;
553 prog->info.outputs_written = BITFIELD64_BIT(FRAG_RESULT_COLOR);
554 prog->SamplersUsed = 0;
555 prog->Parameters = _mesa_new_parameter_list();
556
557 /* fill in inputs_read, SamplersUsed, TexturesUsed */
558 for (pass = 0; pass < atifs->NumPasses; pass++) {
559 for (r = 0; r < MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
560 struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
561 GLuint pass_tex = texinst->src;
562
563 if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
564 /* mark which texcoords are used */
565 prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
566 /* by default there is 1:1 mapping between samplers and textures */
567 prog->SamplersUsed |= (1 << r);
568 /* the target is unknown here, it will be fixed in the draw call */
569 prog->TexturesUsed[r] = TEXTURE_2D_BIT;
570 } else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
571 if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
572 prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
573 }
574 }
575 }
576 }
577 for (pass = 0; pass < atifs->NumPasses; pass++) {
578 for (i = 0; i < atifs->numArithInstr[pass]; i++) {
579 struct atifs_instruction *inst = &atifs->Instructions[pass][i];
580
581 for (optype = 0; optype < 2; optype++) { /* color, alpha */
582 if (inst->Opcode[optype]) {
583 for (arg = 0; arg < inst->ArgCount[optype]; arg++) {
584 GLint index = inst->SrcReg[optype][arg].Index;
585 if (index == GL_PRIMARY_COLOR_EXT) {
586 prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_COL0);
587 } else if (index == GL_SECONDARY_INTERPOLATOR_ATI) {
588 /* note: ATI_fragment_shader.txt never specifies what
589 * GL_SECONDARY_INTERPOLATOR_ATI is, swrast uses
590 * VARYING_SLOT_COL1 for this input */
591 prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_COL1);
592 }
593 }
594 }
595 }
596 }
597 }
598 /* we may need fog */
599 prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_FOGC);
600
601 /* we always have the ATI_fs constants, and the fog params */
602 for (i = 0; i < MAX_NUM_FRAGMENT_CONSTANTS_ATI; i++) {
603 _mesa_add_parameter(prog->Parameters, PROGRAM_UNIFORM,
604 NULL, 4, GL_FLOAT, NULL, NULL);
605 }
606 _mesa_add_state_reference(prog->Parameters, fog_params_state);
607 _mesa_add_state_reference(prog->Parameters, fog_color);
608 }
609
610
611 struct tgsi_atifs_transform {
612 struct tgsi_transform_context base;
613 struct tgsi_shader_info info;
614 const struct st_fp_variant_key *key;
615 bool first_instruction_emitted;
616 unsigned fog_factor_temp;
617 };
618
619 static inline struct tgsi_atifs_transform *
tgsi_atifs_transform(struct tgsi_transform_context * tctx)620 tgsi_atifs_transform(struct tgsi_transform_context *tctx)
621 {
622 return (struct tgsi_atifs_transform *)tctx;
623 }
624
625 /* copied from st_cb_drawpixels_shader.c */
626 static void
set_src(struct tgsi_full_instruction * inst,unsigned i,unsigned file,unsigned index,unsigned x,unsigned y,unsigned z,unsigned w)627 set_src(struct tgsi_full_instruction *inst, unsigned i, unsigned file, unsigned index,
628 unsigned x, unsigned y, unsigned z, unsigned w)
629 {
630 inst->Src[i].Register.File = file;
631 inst->Src[i].Register.Index = index;
632 inst->Src[i].Register.SwizzleX = x;
633 inst->Src[i].Register.SwizzleY = y;
634 inst->Src[i].Register.SwizzleZ = z;
635 inst->Src[i].Register.SwizzleW = w;
636 if (file == TGSI_FILE_CONSTANT) {
637 inst->Src[i].Register.Dimension = 1;
638 inst->Src[i].Dimension.Index = 0;
639 }
640 }
641
642 #define SET_SRC(inst, i, file, index, x, y, z, w) \
643 set_src(inst, i, file, index, TGSI_SWIZZLE_##x, TGSI_SWIZZLE_##y, \
644 TGSI_SWIZZLE_##z, TGSI_SWIZZLE_##w)
645
646 static void
transform_decl(struct tgsi_transform_context * tctx,struct tgsi_full_declaration * decl)647 transform_decl(struct tgsi_transform_context *tctx,
648 struct tgsi_full_declaration *decl)
649 {
650 struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
651
652 if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
653 /* fix texture target */
654 unsigned newtarget = ctx->key->texture_targets[decl->Range.First];
655 if (newtarget)
656 decl->SamplerView.Resource = newtarget;
657 }
658
659 tctx->emit_declaration(tctx, decl);
660 }
661
662 static void
transform_instr(struct tgsi_transform_context * tctx,struct tgsi_full_instruction * current_inst)663 transform_instr(struct tgsi_transform_context *tctx,
664 struct tgsi_full_instruction *current_inst)
665 {
666 struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
667
668 if (ctx->first_instruction_emitted)
669 goto transform_inst;
670
671 ctx->first_instruction_emitted = true;
672
673 if (ctx->key->fog) {
674 /* add a new temp for the fog factor */
675 ctx->fog_factor_temp = ctx->info.file_max[TGSI_FILE_TEMPORARY] + 1;
676 tgsi_transform_temp_decl(tctx, ctx->fog_factor_temp);
677 }
678
679 transform_inst:
680 if (current_inst->Instruction.Opcode == TGSI_OPCODE_TEX) {
681 /* fix texture target */
682 unsigned newtarget = ctx->key->texture_targets[current_inst->Src[1].Register.Index];
683 if (newtarget)
684 current_inst->Texture.Texture = newtarget;
685
686 } else if (ctx->key->fog && current_inst->Instruction.Opcode == TGSI_OPCODE_MOV &&
687 current_inst->Dst[0].Register.File == TGSI_FILE_OUTPUT) {
688 struct tgsi_full_instruction inst;
689 unsigned i;
690 int fogc_index = -1;
691 int reg0_index = current_inst->Src[0].Register.Index;
692
693 /* find FOGC input */
694 for (i = 0; i < ctx->info.num_inputs; i++) {
695 if (ctx->info.input_semantic_name[i] == TGSI_SEMANTIC_FOG) {
696 fogc_index = i;
697 break;
698 }
699 }
700 if (fogc_index < 0) {
701 /* should never be reached, because fog coord input is always declared */
702 tctx->emit_instruction(tctx, current_inst);
703 return;
704 }
705
706 /* compute the 1 component fog factor f */
707 if (ctx->key->fog == FOG_LINEAR) {
708 /* LINEAR formula: f = (end - z) / (end - start)
709 * with optimized parameters:
710 * f = MAD(fogcoord, oparams.x, oparams.y)
711 */
712 inst = tgsi_default_full_instruction();
713 inst.Instruction.Opcode = TGSI_OPCODE_MAD;
714 inst.Instruction.NumDstRegs = 1;
715 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
716 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
717 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
718 inst.Instruction.NumSrcRegs = 3;
719 SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
720 SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, X, X, X, X);
721 SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Y, Y, Y, Y);
722 tctx->emit_instruction(tctx, &inst);
723 } else if (ctx->key->fog == FOG_EXP) {
724 /* EXP formula: f = exp(-dens * z)
725 * with optimized parameters:
726 * f = MUL(fogcoord, oparams.z); f= EX2(-f)
727 */
728 inst = tgsi_default_full_instruction();
729 inst.Instruction.Opcode = TGSI_OPCODE_MUL;
730 inst.Instruction.NumDstRegs = 1;
731 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
732 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
733 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
734 inst.Instruction.NumSrcRegs = 2;
735 SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
736 SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Z, Z, Z, Z);
737 tctx->emit_instruction(tctx, &inst);
738
739 inst = tgsi_default_full_instruction();
740 inst.Instruction.Opcode = TGSI_OPCODE_EX2;
741 inst.Instruction.NumDstRegs = 1;
742 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
743 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
744 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
745 inst.Instruction.NumSrcRegs = 1;
746 SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
747 inst.Src[0].Register.Negate = 1;
748 tctx->emit_instruction(tctx, &inst);
749 } else if (ctx->key->fog == FOG_EXP2) {
750 /* EXP2 formula: f = exp(-(dens * z)^2)
751 * with optimized parameters:
752 * f = MUL(fogcoord, oparams.w); f=MUL(f, f); f= EX2(-f)
753 */
754 inst = tgsi_default_full_instruction();
755 inst.Instruction.Opcode = TGSI_OPCODE_MUL;
756 inst.Instruction.NumDstRegs = 1;
757 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
758 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
759 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
760 inst.Instruction.NumSrcRegs = 2;
761 SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
762 SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, W, W, W, W);
763 tctx->emit_instruction(tctx, &inst);
764
765 inst = tgsi_default_full_instruction();
766 inst.Instruction.Opcode = TGSI_OPCODE_MUL;
767 inst.Instruction.NumDstRegs = 1;
768 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
769 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
770 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
771 inst.Instruction.NumSrcRegs = 2;
772 SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
773 SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
774 tctx->emit_instruction(tctx, &inst);
775
776 inst = tgsi_default_full_instruction();
777 inst.Instruction.Opcode = TGSI_OPCODE_EX2;
778 inst.Instruction.NumDstRegs = 1;
779 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
780 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
781 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
782 inst.Instruction.NumSrcRegs = 1;
783 SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
784 inst.Src[0].Register.Negate ^= 1;
785 tctx->emit_instruction(tctx, &inst);
786 }
787 /* f = saturate(f) */
788 inst = tgsi_default_full_instruction();
789 inst.Instruction.Opcode = TGSI_OPCODE_MOV;
790 inst.Instruction.NumDstRegs = 1;
791 inst.Instruction.Saturate = 1;
792 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
793 inst.Dst[0].Register.Index = ctx->fog_factor_temp;
794 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
795 inst.Instruction.NumSrcRegs = 1;
796 SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
797 tctx->emit_instruction(tctx, &inst);
798
799 /* REG0 = LRP(f, REG0, fogcolor) */
800 inst = tgsi_default_full_instruction();
801 inst.Instruction.Opcode = TGSI_OPCODE_LRP;
802 inst.Instruction.NumDstRegs = 1;
803 inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
804 inst.Dst[0].Register.Index = reg0_index;
805 inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
806 inst.Instruction.NumSrcRegs = 3;
807 SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, X, X, Y);
808 SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, reg0_index, X, Y, Z, W);
809 SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI + 1, X, Y, Z, W);
810 tctx->emit_instruction(tctx, &inst);
811 }
812
813 tctx->emit_instruction(tctx, current_inst);
814 }
815
816 /*
817 * A post-process step in the draw call to fix texture targets and
818 * insert code for fog.
819 */
820 const struct tgsi_token *
st_fixup_atifs(const struct tgsi_token * tokens,const struct st_fp_variant_key * key)821 st_fixup_atifs(const struct tgsi_token *tokens,
822 const struct st_fp_variant_key *key)
823 {
824 struct tgsi_atifs_transform ctx;
825 struct tgsi_token *newtoks;
826 int newlen;
827
828 memset(&ctx, 0, sizeof(ctx));
829 ctx.base.transform_declaration = transform_decl;
830 ctx.base.transform_instruction = transform_instr;
831 ctx.key = key;
832 tgsi_scan_shader(tokens, &ctx.info);
833
834 newlen = tgsi_num_tokens(tokens) + 30;
835 newtoks = tgsi_alloc_tokens(newlen);
836 if (!newtoks)
837 return NULL;
838
839 tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base);
840 return newtoks;
841 }
842
843