src/gallium/drivers/r300/r300_fs.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *                Joakim Sindholt <opensource@zhasha.com>
   4  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * on the rights to use, copy, modify, merge, publish, distribute, sub
  10  * license, and/or sell copies of the Software, and to permit persons to whom
  11  * the Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  23  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  24
  25 #include "util/u_math.h"
  26 #include "util/u_memory.h"
  27
  28 #include "tgsi/tgsi_dump.h"
  29 #include "tgsi/tgsi_ureg.h"
  30
  31 #include "r300_cb.h"
  32 #include "r300_context.h"
  33 #include "r300_emit.h"
  34 #include "r300_screen.h"
  35 #include "r300_fs.h"
  36 #include "r300_reg.h"
  37 #include "r300_tgsi_to_rc.h"
  38
  39 #include "radeon_code.h"
  40 #include "radeon_compiler.h"
  41
  42 /* Convert info about FS input semantics to r300_shader_semantics. */
  43 void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
  44                                 struct r300_shader_semantics* fs_inputs)
  45 {
  46     int i;
  47     unsigned index;
  48
  49     r300_shader_semantics_reset(fs_inputs);
  50
  51     for (i = 0; i < info->num_inputs; i++) {
  52         index = info->input_semantic_index[i];
  53
  54         switch (info->input_semantic_name[i]) {
  55             case TGSI_SEMANTIC_COLOR:
  56                 assert(index < ATTR_COLOR_COUNT);
  57                 fs_inputs->color[index] = i;
  58                 break;
  59
  60             case TGSI_SEMANTIC_GENERIC:
  61                 assert(index < ATTR_GENERIC_COUNT);
  62                 fs_inputs->generic[index] = i;
  63                 break;
  64
  65             case TGSI_SEMANTIC_FOG:
  66                 assert(index == 0);
  67                 fs_inputs->fog = i;
  68                 break;
  69
  70             case TGSI_SEMANTIC_POSITION:
  71                 assert(index == 0);
  72                 fs_inputs->wpos = i;
  73                 break;
  74
  75             case TGSI_SEMANTIC_FACE:
  76                 assert(index == 0);
  77                 fs_inputs->face = i;
  78                 break;
  79
  80             default:
  81                 fprintf(stderr, "r300: FP: Unknown input semantic: %i\n",
  82                         info->input_semantic_name[i]);
  83         }
  84     }
  85 }
  86
  87 static void find_output_registers(struct r300_fragment_program_compiler * compiler,
  88                                   struct r300_fragment_shader_code *shader)
  89 {
  90     unsigned i, colorbuf_count = 0;
  91
  92     /* Mark the outputs as not present initially */
  93     compiler->OutputColor[0] = shader->info.num_outputs;
  94     compiler->OutputColor[1] = shader->info.num_outputs;
  95     compiler->OutputColor[2] = shader->info.num_outputs;
  96     compiler->OutputColor[3] = shader->info.num_outputs;
  97     compiler->OutputDepth = shader->info.num_outputs;
  98
  99     /* Now see where they really are. */
 100     for(i = 0; i < shader->info.num_outputs; ++i) {
 101         switch(shader->info.output_semantic_name[i]) {
 102             case TGSI_SEMANTIC_COLOR:
 103                 compiler->OutputColor[colorbuf_count] = i;
 104                 colorbuf_count++;
 105                 break;
 106             case TGSI_SEMANTIC_POSITION:
 107                 compiler->OutputDepth = i;
 108                 break;
 109         }
 110     }
 111 }
 112
 113 static void allocate_hardware_inputs(
 114     struct r300_fragment_program_compiler * c,
 115     void (*allocate)(void * data, unsigned input, unsigned hwreg),
 116     void * mydata)
 117 {
 118     struct r300_shader_semantics* inputs =
 119         (struct r300_shader_semantics*)c->UserData;
 120     int i, reg = 0;
 121
 122     /* Allocate input registers. */
 123     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 124         if (inputs->color[i] != ATTR_UNUSED) {
 125             allocate(mydata, inputs->color[i], reg++);
 126         }
 127     }
 128     if (inputs->face != ATTR_UNUSED) {
 129         allocate(mydata, inputs->face, reg++);
 130     }
 131     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
 132         if (inputs->generic[i] != ATTR_UNUSED) {
 133             allocate(mydata, inputs->generic[i], reg++);
 134         }
 135     }
 136     if (inputs->fog != ATTR_UNUSED) {
 137         allocate(mydata, inputs->fog, reg++);
 138     }
 139     if (inputs->wpos != ATTR_UNUSED) {
 140         allocate(mydata, inputs->wpos, reg++);
 141     }
 142 }
 143
 144 static void get_external_state(
 145     struct r300_context* r300,
 146     struct r300_fragment_program_external_state* state)
 147 {
 148     struct r300_textures_state *texstate = r300->textures_state.state;
 149     unsigned i;
 150     unsigned char *swizzle;
 151
 152     for (i = 0; i < texstate->sampler_state_count; i++) {
 153         struct r300_sampler_state* s = texstate->sampler_states[i];
 154
 155         if (!s) {
 156             continue;
 157         }
 158
 159         if (s->state.compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
 160             state->unit[i].compare_mode_enabled = 1;
 161
 162             /* Pass depth texture swizzling to the compiler. */
 163             if (texstate->sampler_views[i]) {
 164                 swizzle = texstate->sampler_views[i]->swizzle;
 165
 166                 state->unit[i].depth_texture_swizzle =
 167                     RC_MAKE_SWIZZLE(swizzle[0], swizzle[1],
 168                                     swizzle[2], swizzle[3]);
 169             } else {
 170                 state->unit[i].depth_texture_swizzle = RC_SWIZZLE_XYZW;
 171             }
 172
 173             /* Fortunately, no need to translate this. */
 174             state->unit[i].texture_compare_func = s->state.compare_func;
 175         }
 176
 177         state->unit[i].non_normalized_coords = !s->state.normalized_coords;
 178
 179         if (texstate->sampler_views[i]) {
 180             struct r300_texture *t;
 181             t = (struct r300_texture*)texstate->sampler_views[i]->base.texture;
 182
 183             /* XXX this should probably take into account STR, not just S. */
 184             if (t->desc.is_npot) {
 185                 switch (s->state.wrap_s) {
 186                     case PIPE_TEX_WRAP_REPEAT:
 187                         state->unit[i].wrap_mode = RC_WRAP_REPEAT;
 188                         state->unit[i].fake_npot = TRUE;
 189                         break;
 190
 191                     case PIPE_TEX_WRAP_MIRROR_REPEAT:
 192                         state->unit[i].wrap_mode = RC_WRAP_MIRRORED_REPEAT;
 193                         state->unit[i].fake_npot = TRUE;
 194                         break;
 195
 196                     case PIPE_TEX_WRAP_MIRROR_CLAMP:
 197                     case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
 198                     case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
 199                         state->unit[i].wrap_mode = RC_WRAP_MIRRORED_CLAMP;
 200                         state->unit[i].fake_npot = TRUE;
 201                         break;
 202
 203                     default:
 204                         state->unit[i].wrap_mode = RC_WRAP_NONE;
 205                         break;
 206                 }
 207             }
 208         }
 209     }
 210 }
 211
 212 static void r300_translate_fragment_shader(
 213     struct r300_context* r300,
 214     struct r300_fragment_shader_code* shader,
 215     const struct tgsi_token *tokens);
 216
 217 static void r300_dummy_fragment_shader(
 218     struct r300_context* r300,
 219     struct r300_fragment_shader_code* shader)
 220 {
 221     struct pipe_shader_state state;
 222     struct ureg_program *ureg;
 223     struct ureg_dst out;
 224     struct ureg_src imm;
 225
 226     /* Make a simple fragment shader which outputs (0, 0, 0, 1) */
 227     ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 228     out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 229     imm = ureg_imm4f(ureg, 0, 0, 0, 1);
 230
 231     ureg_MOV(ureg, out, imm);
 232     ureg_END(ureg);
 233
 234     state.tokens = ureg_finalize(ureg);
 235
 236     shader->dummy = TRUE;
 237     r300_translate_fragment_shader(r300, shader, state.tokens);
 238
 239     ureg_destroy(ureg);
 240 }
 241
 242 static void r300_emit_fs_code_to_buffer(
 243     struct r300_context *r300,
 244     struct r300_fragment_shader_code *shader)
 245 {
 246     struct rX00_fragment_program_code *generic_code = &shader->code;
 247     unsigned imm_count = shader->immediates_count;
 248     unsigned imm_first = shader->externals_count;
 249     unsigned imm_end = generic_code->constants.Count;
 250     struct rc_constant *constants = generic_code->constants.Constants;
 251     unsigned i;
 252     CB_LOCALS;
 253
 254     if (r300->screen->caps.is_r500) {
 255         struct r500_fragment_program_code *code = &generic_code->code.r500;
 256
 257         shader->cb_code_size = 19 +
 258                                ((code->inst_end + 1) * 6) +
 259                                imm_count * 7 +
 260                                code->int_constant_count * 2;
 261
 262         NEW_CB(shader->cb_code, shader->cb_code_size);
 263         OUT_CB_REG(R500_US_CONFIG, R500_ZERO_TIMES_ANYTHING_EQUALS_ZERO);
 264         OUT_CB_REG(R500_US_PIXSIZE, code->max_temp_idx);
 265         OUT_CB_REG(R500_US_FC_CTRL, code->us_fc_ctrl);
 266         for(i = 0; i < code->int_constant_count; i++){
 267                 OUT_CB_REG(R500_US_FC_INT_CONST_0 + (i * 4),
 268                                                 code->int_constants[i]);
 269         }
 270         OUT_CB_REG(R500_US_CODE_RANGE,
 271                    R500_US_CODE_RANGE_ADDR(0) | R500_US_CODE_RANGE_SIZE(code->inst_end));
 272         OUT_CB_REG(R500_US_CODE_OFFSET, 0);
 273         OUT_CB_REG(R500_US_CODE_ADDR,
 274                    R500_US_CODE_START_ADDR(0) | R500_US_CODE_END_ADDR(code->inst_end));
 275
 276         OUT_CB_REG(R500_GA_US_VECTOR_INDEX, R500_GA_US_VECTOR_INDEX_TYPE_INSTR);
 277         OUT_CB_ONE_REG(R500_GA_US_VECTOR_DATA, (code->inst_end + 1) * 6);
 278         for (i = 0; i <= code->inst_end; i++) {
 279             OUT_CB(code->inst[i].inst0);
 280             OUT_CB(code->inst[i].inst1);
 281             OUT_CB(code->inst[i].inst2);
 282             OUT_CB(code->inst[i].inst3);
 283             OUT_CB(code->inst[i].inst4);
 284             OUT_CB(code->inst[i].inst5);
 285         }
 286
 287         /* Emit immediates. */
 288         if (imm_count) {
 289             for(i = imm_first; i < imm_end; ++i) {
 290                 if (constants[i].Type == RC_CONSTANT_IMMEDIATE) {
 291                     const float *data = constants[i].u.Immediate;
 292
 293                     OUT_CB_REG(R500_GA_US_VECTOR_INDEX,
 294                                R500_GA_US_VECTOR_INDEX_TYPE_CONST |
 295                                (i & R500_GA_US_VECTOR_INDEX_MASK));
 296                     OUT_CB_ONE_REG(R500_GA_US_VECTOR_DATA, 4);
 297                     OUT_CB_TABLE(data, 4);
 298                 }
 299             }
 300         }
 301     } else { /* r300 */
 302         struct r300_fragment_program_code *code = &generic_code->code.r300;
 303
 304         shader->cb_code_size = 19 +
 305                                (r300->screen->caps.is_r400 ? 2 : 0) +
 306                                code->alu.length * 4 +
 307                                (code->tex.length ? (1 + code->tex.length) : 0) +
 308                                imm_count * 5;
 309
 310         NEW_CB(shader->cb_code, shader->cb_code_size);
 311
 312         if (r300->screen->caps.is_r400)
 313             OUT_CB_REG(R400_US_CODE_BANK, 0);
 314
 315         OUT_CB_REG(R300_US_CONFIG, code->config);
 316         OUT_CB_REG(R300_US_PIXSIZE, code->pixsize);
 317         OUT_CB_REG(R300_US_CODE_OFFSET, code->code_offset);
 318
 319         OUT_CB_REG_SEQ(R300_US_CODE_ADDR_0, 4);
 320         OUT_CB_TABLE(code->code_addr, 4);
 321
 322         OUT_CB_REG_SEQ(R300_US_ALU_RGB_INST_0, code->alu.length);
 323         for (i = 0; i < code->alu.length; i++)
 324             OUT_CB(code->alu.inst[i].rgb_inst);
 325
 326         OUT_CB_REG_SEQ(R300_US_ALU_RGB_ADDR_0, code->alu.length);
 327         for (i = 0; i < code->alu.length; i++)
 328             OUT_CB(code->alu.inst[i].rgb_addr);
 329
 330         OUT_CB_REG_SEQ(R300_US_ALU_ALPHA_INST_0, code->alu.length);
 331         for (i = 0; i < code->alu.length; i++)
 332             OUT_CB(code->alu.inst[i].alpha_inst);
 333
 334         OUT_CB_REG_SEQ(R300_US_ALU_ALPHA_ADDR_0, code->alu.length);
 335         for (i = 0; i < code->alu.length; i++)
 336             OUT_CB(code->alu.inst[i].alpha_addr);
 337
 338         if (code->tex.length) {
 339             OUT_CB_REG_SEQ(R300_US_TEX_INST_0, code->tex.length);
 340             OUT_CB_TABLE(code->tex.inst, code->tex.length);
 341         }
 342
 343         /* Emit immediates. */
 344         if (imm_count) {
 345             for(i = imm_first; i < imm_end; ++i) {
 346                 if (constants[i].Type == RC_CONSTANT_IMMEDIATE) {
 347                     const float *data = constants[i].u.Immediate;
 348
 349                     OUT_CB_REG_SEQ(R300_PFS_PARAM_0_X + i * 16, 4);
 350                     OUT_CB(pack_float24(data[0]));
 351                     OUT_CB(pack_float24(data[1]));
 352                     OUT_CB(pack_float24(data[2]));
 353                     OUT_CB(pack_float24(data[3]));
 354                 }
 355             }
 356         }
 357     }
 358
 359     OUT_CB_REG(R300_FG_DEPTH_SRC, shader->fg_depth_src);
 360     OUT_CB_REG(R300_US_W_FMT, shader->us_out_w);
 361     END_CB;
 362 }
 363
 364 static void r300_translate_fragment_shader(
 365     struct r300_context* r300,
 366     struct r300_fragment_shader_code* shader,
 367     const struct tgsi_token *tokens)
 368 {
 369     struct r300_fragment_program_compiler compiler;
 370     struct tgsi_to_rc ttr;
 371     int wpos, face;
 372     unsigned i;
 373
 374     tgsi_scan_shader(tokens, &shader->info);
 375     r300_shader_read_fs_inputs(&shader->info, &shader->inputs);
 376
 377     wpos = shader->inputs.wpos;
 378     face = shader->inputs.face;
 379
 380     /* Setup the compiler. */
 381     memset(&compiler, 0, sizeof(compiler));
 382     rc_init(&compiler.Base);
 383     compiler.Base.Debug = DBG_ON(r300, DBG_FP);
 384
 385     compiler.code = &shader->code;
 386     compiler.state = shader->compare_state;
 387     compiler.Base.is_r500 = r300->screen->caps.is_r500;
 388     compiler.Base.max_temp_regs = compiler.Base.is_r500 ? 128 : 32;
 389     compiler.Base.remove_unused_constants = TRUE;
 390     compiler.AllocateHwInputs = &allocate_hardware_inputs;
 391     compiler.UserData = &shader->inputs;
 392
 393     find_output_registers(&compiler, shader);
 394
 395     if (compiler.Base.Debug) {
 396         DBG(r300, DBG_FP, "r300: Initial fragment program\n");
 397         tgsi_dump(tokens, 0);
 398     }
 399
 400     /* Translate TGSI to our internal representation */
 401     ttr.compiler = &compiler.Base;
 402     ttr.info = &shader->info;
 403     ttr.use_half_swizzles = TRUE;
 404
 405     r300_tgsi_to_rc(&ttr, tokens);
 406
 407     /**
 408      * Transform the program to support WPOS.
 409      *
 410      * Introduce a small fragment at the start of the program that will be
 411      * the only code that directly reads the WPOS input.
 412      * All other code pieces that reference that input will be rewritten
 413      * to read from a newly allocated temporary. */
 414     if (wpos != ATTR_UNUSED) {
 415         /* Moving the input to some other reg is not really necessary. */
 416         rc_transform_fragment_wpos(&compiler.Base, wpos, wpos, TRUE);
 417     }
 418
 419     if (face != ATTR_UNUSED) {
 420         rc_transform_fragment_face(&compiler.Base, face);
 421     }
 422
 423     /* Invoke the compiler */
 424     r3xx_compile_fragment_program(&compiler);
 425
 426     /* Shaders with zero instructions are invalid,
 427      * use the dummy shader instead. */
 428     if (shader->code.code.r500.inst_end == -1) {
 429         rc_destroy(&compiler.Base);
 430         r300_dummy_fragment_shader(r300, shader);
 431         return;
 432     }
 433
 434     if (compiler.Base.Error) {
 435         fprintf(stderr, "r300 FP: Compiler Error:\n%sUsing a dummy shader"
 436                 " instead.\n", compiler.Base.ErrorMsg);
 437
 438         if (shader->dummy) {
 439             fprintf(stderr, "r300 FP: Cannot compile the dummy shader! "
 440                     "Giving up...\n");
 441             abort();
 442         }
 443
 444         rc_destroy(&compiler.Base);
 445         r300_dummy_fragment_shader(r300, shader);
 446         return;
 447     }
 448
 449     /* Initialize numbers of constants for each type. */
 450     shader->externals_count = 0;
 451     for (i = 0;
 452          i < shader->code.constants.Count &&
 453          shader->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
 454         shader->externals_count = i+1;
 455     }
 456     shader->immediates_count = 0;
 457     shader->rc_state_count = 0;
 458
 459     for (i = shader->externals_count; i < shader->code.constants.Count; i++) {
 460         switch (shader->code.constants.Constants[i].Type) {
 461             case RC_CONSTANT_IMMEDIATE:
 462                 ++shader->immediates_count;
 463                 break;
 464             case RC_CONSTANT_STATE:
 465                 ++shader->rc_state_count;
 466                 break;
 467             default:
 468                 assert(0);
 469         }
 470     }
 471
 472     /* Setup shader depth output. */
 473     if (shader->code.writes_depth) {
 474         shader->fg_depth_src = R300_FG_DEPTH_SRC_SHADER;
 475         shader->us_out_w = R300_W_FMT_W24 | R300_W_SRC_US;
 476     } else {
 477         shader->fg_depth_src = R300_FG_DEPTH_SRC_SCAN;
 478         shader->us_out_w = R300_W_FMT_W0 | R300_W_SRC_US;
 479     }
 480
 481     /* And, finally... */
 482     rc_destroy(&compiler.Base);
 483
 484     /* Build the command buffer. */
 485     r300_emit_fs_code_to_buffer(r300, shader);
 486 }
 487
 488 boolean r300_pick_fragment_shader(struct r300_context* r300)
 489 {
 490     struct r300_fragment_shader* fs = r300_fs(r300);
 491     struct r300_fragment_program_external_state state = {{{ 0 }}};
 492     struct r300_fragment_shader_code* ptr;
 493
 494     get_external_state(r300, &state);
 495
 496     if (!fs->first) {
 497         /* Build the fragment shader for the first time. */
 498         fs->first = fs->shader = CALLOC_STRUCT(r300_fragment_shader_code);
 499
 500         memcpy(&fs->shader->compare_state, &state,
 501             sizeof(struct r300_fragment_program_external_state));
 502         r300_translate_fragment_shader(r300, fs->shader, fs->state.tokens);
 503         return TRUE;
 504
 505     } else {
 506         /* Check if the currently-bound shader has been compiled
 507          * with the texture-compare state we need. */
 508         if (memcmp(&fs->shader->compare_state, &state, sizeof(state)) != 0) {
 509             /* Search for the right shader. */
 510             ptr = fs->first;
 511             while (ptr) {
 512                 if (memcmp(&ptr->compare_state, &state, sizeof(state)) == 0) {
 513                     if (fs->shader != ptr) {
 514                         fs->shader = ptr;
 515                         return TRUE;
 516                     }
 517                     /* The currently-bound one is OK. */
 518                     return FALSE;
 519                 }
 520                 ptr = ptr->next;
 521             }
 522
 523             /* Not found, gotta compile a new one. */
 524             ptr = CALLOC_STRUCT(r300_fragment_shader_code);
 525             ptr->next = fs->first;
 526             fs->first = fs->shader = ptr;
 527
 528             ptr->compare_state = state;
 529             r300_translate_fragment_shader(r300, ptr, fs->state.tokens);
 530             return TRUE;
 531         }
 532     }
 533
 534     return FALSE;
 535 }