src/mesa/shader/slang/slang_ir.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 2005-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include "main/imports.h"
  27 #include "main/context.h"
  28 #include "slang_ir.h"
  29 #include "slang_mem.h"
  30 #include "shader/prog_instruction.h"
  31 #include "shader/prog_print.h"
  32
  33
  34 static const slang_ir_info IrInfo[] = {
  35    /* binary ops */
  36    { IR_ADD, "IR_ADD", OPCODE_ADD, 4, 2 },
  37    { IR_SUB, "IR_SUB", OPCODE_SUB, 4, 2 },
  38    { IR_MUL, "IR_MUL", OPCODE_MUL, 4, 2 },
  39    { IR_DIV, "IR_DIV", OPCODE_NOP, 0, 2 }, /* XXX broke */
  40    { IR_DOT4, "IR_DOT4", OPCODE_DP4, 1, 2 },
  41    { IR_DOT3, "IR_DOT3", OPCODE_DP3, 1, 2 },
  42    { IR_DOT2, "IR_DOT2", OPCODE_DP2, 1, 2 },
  43    { IR_NRM4, "IR_NRM4", OPCODE_NRM4, 1, 1 },
  44    { IR_NRM3, "IR_NRM3", OPCODE_NRM3, 1, 1 },
  45    { IR_CROSS, "IR_CROSS", OPCODE_XPD, 3, 2 },
  46    { IR_LRP, "IR_LRP", OPCODE_LRP, 4, 3 },
  47    { IR_MIN, "IR_MIN", OPCODE_MIN, 4, 2 },
  48    { IR_MAX, "IR_MAX", OPCODE_MAX, 4, 2 },
  49    { IR_CLAMP, "IR_CLAMP", OPCODE_NOP, 4, 3 }, /* special case: emit_clamp() */
  50    { IR_SEQUAL, "IR_SEQUAL", OPCODE_SEQ, 4, 2 },
  51    { IR_SNEQUAL, "IR_SNEQUAL", OPCODE_SNE, 4, 2 },
  52    { IR_SGE, "IR_SGE", OPCODE_SGE, 4, 2 },
  53    { IR_SGT, "IR_SGT", OPCODE_SGT, 4, 2 },
  54    { IR_SLE, "IR_SLE", OPCODE_SLE, 4, 2 },
  55    { IR_SLT, "IR_SLT", OPCODE_SLT, 4, 2 },
  56    { IR_POW, "IR_POW", OPCODE_POW, 1, 2 },
  57    { IR_EQUAL, "IR_EQUAL", OPCODE_NOP, 1, 2 },
  58    { IR_NOTEQUAL, "IR_NOTEQUAL", OPCODE_NOP, 1, 2 },
  59
  60    /* unary ops */
  61    { IR_MOVE, "IR_MOVE", OPCODE_MOV, 4, 1 },
  62    { IR_I_TO_F, "IR_I_TO_F", OPCODE_MOV, 4, 1 },  /* int[4] to float[4] */
  63    { IR_F_TO_I, "IR_F_TO_I", OPCODE_TRUNC, 4, 1 },
  64    { IR_EXP, "IR_EXP", OPCODE_EXP, 1, 1 },
  65    { IR_EXP2, "IR_EXP2", OPCODE_EX2, 1, 1 },
  66    { IR_LOG2, "IR_LOG2", OPCODE_LG2, 1, 1 },
  67    { IR_RSQ, "IR_RSQ", OPCODE_RSQ, 1, 1 },
  68    { IR_RCP, "IR_RCP", OPCODE_RCP, 1, 1 },
  69    { IR_FLOOR, "IR_FLOOR", OPCODE_FLR, 4, 1 },
  70    { IR_FRAC, "IR_FRAC", OPCODE_FRC, 4, 1 },
  71    { IR_ABS, "IR_ABS", OPCODE_ABS, 4, 1 },
  72    { IR_NEG, "IR_NEG", OPCODE_NOP, 4, 1 }, /* special case: emit_negation() */
  73    { IR_DDX, "IR_DDX", OPCODE_DDX, 4, 1 },
  74    { IR_DDY, "IR_DDY", OPCODE_DDY, 4, 1 },
  75    { IR_SIN, "IR_SIN", OPCODE_SIN, 1, 1 },
  76    { IR_COS, "IR_COS", OPCODE_COS, 1, 1 },
  77    { IR_NOISE1, "IR_NOISE1", OPCODE_NOISE1, 1, 1 },
  78    { IR_NOISE2, "IR_NOISE2", OPCODE_NOISE2, 1, 1 },
  79    { IR_NOISE3, "IR_NOISE3", OPCODE_NOISE3, 1, 1 },
  80    { IR_NOISE4, "IR_NOISE4", OPCODE_NOISE4, 1, 1 },
  81
  82    /* other */
  83    { IR_SEQ, "IR_SEQ", OPCODE_NOP, 0, 0 },
  84    { IR_SCOPE, "IR_SCOPE", OPCODE_NOP, 0, 0 },
  85    { IR_LABEL, "IR_LABEL", OPCODE_NOP, 0, 0 },
  86    { IR_IF, "IR_IF", OPCODE_NOP, 0, 0 },
  87    { IR_KILL, "IR_KILL", OPCODE_NOP, 0, 0 },
  88    { IR_COND, "IR_COND", OPCODE_NOP, 0, 0 },
  89    { IR_CALL, "IR_CALL", OPCODE_NOP, 0, 0 },
  90    { IR_COPY, "IR_COPY", OPCODE_NOP, 0, 1 },
  91    { IR_NOT, "IR_NOT", OPCODE_NOP, 1, 1 },
  92    { IR_VAR, "IR_VAR", OPCODE_NOP, 0, 0 },
  93    { IR_VAR_DECL, "IR_VAR_DECL", OPCODE_NOP, 0, 0 },
  94    { IR_TEX, "IR_TEX", OPCODE_TEX, 4, 1 },
  95    { IR_TEXB, "IR_TEXB", OPCODE_TXB, 4, 1 },
  96    { IR_TEXP, "IR_TEXP", OPCODE_TXP, 4, 1 },
  97    { IR_FLOAT, "IR_FLOAT", OPCODE_NOP, 0, 0 }, /* float literal */
  98    { IR_FIELD, "IR_FIELD", OPCODE_NOP, 0, 0 },
  99    { IR_ELEMENT, "IR_ELEMENT", OPCODE_NOP, 0, 0 },
 100    { IR_SWIZZLE, "IR_SWIZZLE", OPCODE_NOP, 0, 0 },
 101    { IR_NOP, "IR_NOP", OPCODE_NOP, 0, 0 },
 102    { 0, NULL, 0, 0, 0 }
 103 };
 104
 105
 106 const slang_ir_info *
 107 _slang_ir_info(slang_ir_opcode opcode)
 108 {
 109    GLuint i;
 110    for (i = 0; IrInfo[i].IrName; i++) {
 111       if (IrInfo[i].IrOpcode == opcode) {
 112          return IrInfo + i;
 113       }
 114    }
 115    return NULL;
 116 }
 117
 118
 119 void
 120 _slang_init_ir_storage(slang_ir_storage *st,
 121                        enum register_file file, GLint index, GLint size,
 122                        GLuint swizzle)
 123 {
 124    st->File = file;
 125    st->Index = index;
 126    st->Size = size;
 127    st->Swizzle = swizzle;
 128    st->Parent = NULL;
 129    st->IsIndirect = GL_FALSE;
 130 }
 131
 132
 133 /**
 134  * Return a new slang_ir_storage object.
 135  */
 136 slang_ir_storage *
 137 _slang_new_ir_storage(enum register_file file, GLint index, GLint size)
 138 {
 139    slang_ir_storage *st;
 140    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 141    if (st) {
 142       st->File = file;
 143       st->Index = index;
 144       st->Size = size;
 145       st->Swizzle = SWIZZLE_NOOP;
 146       st->Parent = NULL;
 147       st->IsIndirect = GL_FALSE;
 148    }
 149    return st;
 150 }
 151
 152
 153 /**
 154  * Return a new slang_ir_storage object.
 155  */
 156 slang_ir_storage *
 157 _slang_new_ir_storage_swz(enum register_file file, GLint index, GLint size,
 158                           GLuint swizzle)
 159 {
 160    slang_ir_storage *st;
 161    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 162    if (st) {
 163       st->File = file;
 164       st->Index = index;
 165       st->Size = size;
 166       st->Swizzle = swizzle;
 167       st->Parent = NULL;
 168       st->IsIndirect = GL_FALSE;
 169    }
 170    return st;
 171 }
 172
 173
 174 /**
 175  * Return a new slang_ir_storage object.
 176  */
 177 slang_ir_storage *
 178 _slang_new_ir_storage_relative(GLint index, GLint size,
 179                                slang_ir_storage *parent)
 180 {
 181    slang_ir_storage *st;
 182    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 183    if (st) {
 184       st->File = PROGRAM_UNDEFINED;
 185       st->Index = index;
 186       st->Size = size;
 187       st->Swizzle = SWIZZLE_NOOP;
 188       st->Parent = parent;
 189       st->IsIndirect = GL_FALSE;
 190    }
 191    return st;
 192 }
 193
 194
 195 slang_ir_storage *
 196 _slang_new_ir_storage_indirect(enum register_file file,
 197                                GLint index,
 198                                GLint size,
 199                                enum register_file indirectFile,
 200                                GLint indirectIndex,
 201                                GLuint indirectSwizzle)
 202 {
 203    slang_ir_storage *st;
 204    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 205    if (st) {
 206       st->File = file;
 207       st->Index = index;
 208       st->Size = size;
 209       st->Swizzle = SWIZZLE_NOOP;
 210       st->IsIndirect = GL_TRUE;
 211       st->IndirectFile = indirectFile;
 212       st->IndirectIndex = indirectIndex;
 213       st->IndirectSwizzle = indirectSwizzle;
 214    }
 215    return st;
 216 }
 217
 218
 219 /* XXX temporary function */
 220 void
 221 _slang_copy_ir_storage(slang_ir_storage *dst, const slang_ir_storage *src)
 222 {
 223    *dst = *src;
 224    dst->Parent = NULL;
 225 }
 226
 227
 228
 229 static const char *
 230 _slang_ir_name(slang_ir_opcode opcode)
 231 {
 232    return _slang_ir_info(opcode)->IrName;
 233 }
 234
 235
 236
 237 #if 0 /* no longer needed with mempool */
 238 /**
 239  * Since many IR nodes might point to the same IR storage info, we need
 240  * to be careful when deleting things.
 241  * Before deleting an IR tree, traverse it and do refcounting on the
 242  * IR storage nodes.  Use the refcount info during delete to free things
 243  * properly.
 244  */
 245 static void
 246 _slang_refcount_storage(slang_ir_node *n)
 247 {
 248    GLuint i;
 249    if (!n)
 250       return;
 251    if (n->Store)
 252       n->Store->RefCount++;
 253    for (i = 0; i < 3; i++)
 254       _slang_refcount_storage(n->Children[i]);
 255 }
 256 #endif
 257
 258
 259 static void
 260 _slang_free_ir(slang_ir_node *n)
 261 {
 262    GLuint i;
 263    if (!n)
 264       return;
 265
 266 #if 0
 267    if (n->Store) {
 268       n->Store->RefCount--;
 269       if (n->Store->RefCount == 0) {
 270          _slang_free(n->Store);
 271          n->Store = NULL;
 272       }
 273    }
 274 #endif
 275
 276    for (i = 0; i < 3; i++)
 277       _slang_free_ir(n->Children[i]);
 278    /* Do not free n->List since it's a child elsewhere */
 279    _slang_free(n);
 280 }
 281
 282
 283 /**
 284  * Recursively free an IR tree.
 285  */
 286 void
 287 _slang_free_ir_tree(slang_ir_node *n)
 288 {
 289 #if 0
 290    _slang_refcount_storage(n);
 291 #endif
 292    _slang_free_ir(n);
 293 }
 294
 295
 296 static const char *
 297 storage_string(const slang_ir_storage *st)
 298 {
 299    static const char *files[] = {
 300       "TEMP",
 301       "LOCAL_PARAM",
 302       "ENV_PARAM",
 303       "STATE",
 304       "INPUT",
 305       "OUTPUT",
 306       "NAMED_PARAM",
 307       "CONSTANT",
 308       "UNIFORM",
 309       "VARYING",
 310       "WRITE_ONLY",
 311       "ADDRESS",
 312       "SAMPLER",
 313       "UNDEFINED"
 314    };
 315    static char s[100];
 316    assert(Elements(files) == PROGRAM_FILE_MAX);
 317 #if 0
 318    if (st->Size == 1)
 319       sprintf(s, "%s[%d]", files[st->File], st->Index);
 320    else
 321       sprintf(s, "%s[%d..%d]", files[st->File], st->Index,
 322               st->Index + st->Size - 1);
 323 #endif
 324    assert(st->File < (GLint) (sizeof(files) / sizeof(files[0])));
 325    sprintf(s, "%s[%d]", files[st->File], st->Index);
 326    return s;
 327 }
 328
 329
 330 static void
 331 spaces(int n)
 332 {
 333    while (n-- > 0) {
 334       printf(" ");
 335    }
 336 }
 337
 338
 339 void
 340 _slang_print_ir_tree(const slang_ir_node *n, int indent)
 341 {
 342 #define IND 0
 343
 344    if (!n)
 345       return;
 346 #if !IND
 347    if (n->Opcode != IR_SEQ)
 348 #else
 349       printf("%3d:", indent);
 350 #endif
 351       spaces(indent);
 352
 353    switch (n->Opcode) {
 354    case IR_SEQ:
 355 #if IND
 356       printf("SEQ  at %p\n", (void*) n);
 357 #endif
 358       assert(n->Children[0]);
 359       assert(n->Children[1]);
 360       _slang_print_ir_tree(n->Children[0], indent + IND);
 361       _slang_print_ir_tree(n->Children[1], indent + IND);
 362       break;
 363    case IR_SCOPE:
 364       printf("NEW SCOPE\n");
 365       assert(!n->Children[1]);
 366       _slang_print_ir_tree(n->Children[0], indent + 3);
 367       break;
 368    case IR_COPY:
 369       printf("COPY\n");
 370       _slang_print_ir_tree(n->Children[0], indent+3);
 371       _slang_print_ir_tree(n->Children[1], indent+3);
 372       break;
 373    case IR_LABEL:
 374       printf("LABEL: %s\n", n->Label->Name);
 375       break;
 376    case IR_COND:
 377       printf("COND\n");
 378       _slang_print_ir_tree(n->Children[0], indent + 3);
 379       break;
 380
 381    case IR_IF:
 382       printf("IF \n");
 383       _slang_print_ir_tree(n->Children[0], indent+3);
 384       spaces(indent);
 385       printf("THEN\n");
 386       _slang_print_ir_tree(n->Children[1], indent+3);
 387       if (n->Children[2]) {
 388          spaces(indent);
 389          printf("ELSE\n");
 390          _slang_print_ir_tree(n->Children[2], indent+3);
 391       }
 392       spaces(indent);
 393       printf("ENDIF\n");
 394       break;
 395
 396    case IR_BEGIN_SUB:
 397       printf("BEGIN_SUB\n");
 398       break;
 399    case IR_END_SUB:
 400       printf("END_SUB\n");
 401       break;
 402    case IR_RETURN:
 403       printf("RETURN\n");
 404       break;
 405    case IR_CALL:
 406       printf("CALL %s\n", n->Label->Name);
 407       break;
 408
 409    case IR_LOOP:
 410       printf("LOOP\n");
 411       _slang_print_ir_tree(n->Children[0], indent+3);
 412       if (n->Children[1]) {
 413          spaces(indent);
 414          printf("TAIL:\n");
 415          _slang_print_ir_tree(n->Children[1], indent+3);
 416       }
 417       spaces(indent);
 418       printf("ENDLOOP\n");
 419       break;
 420    case IR_CONT:
 421       printf("CONT\n");
 422       break;
 423    case IR_BREAK:
 424       printf("BREAK\n");
 425       break;
 426    case IR_BREAK_IF_TRUE:
 427       printf("BREAK_IF_TRUE\n");
 428       _slang_print_ir_tree(n->Children[0], indent+3);
 429       break;
 430    case IR_CONT_IF_TRUE:
 431       printf("CONT_IF_TRUE\n");
 432       _slang_print_ir_tree(n->Children[0], indent+3);
 433       break;
 434
 435    case IR_VAR:
 436       printf("VAR %s%s at %s  store %p\n",
 437              (n->Var ? (char *) n->Var->a_name : "TEMP"),
 438              _mesa_swizzle_string(n->Store->Swizzle, 0, 0),
 439              storage_string(n->Store), (void*) n->Store);
 440       break;
 441    case IR_VAR_DECL:
 442       printf("VAR_DECL %s (%p) at %s  store %p\n",
 443              (n->Var ? (char *) n->Var->a_name : "TEMP"),
 444              (void*) n->Var, storage_string(n->Store),
 445              (void*) n->Store);
 446       break;
 447    case IR_FIELD:
 448       printf("FIELD %s of\n", n->Field);
 449       _slang_print_ir_tree(n->Children[0], indent+3);
 450       break;
 451    case IR_FLOAT:
 452       printf("FLOAT %g %g %g %g\n",
 453              n->Value[0], n->Value[1], n->Value[2], n->Value[3]);
 454       break;
 455    case IR_I_TO_F:
 456       printf("INT_TO_FLOAT\n");
 457       _slang_print_ir_tree(n->Children[0], indent+3);
 458       break;
 459    case IR_F_TO_I:
 460       printf("FLOAT_TO_INT\n");
 461       _slang_print_ir_tree(n->Children[0], indent+3);
 462       break;
 463    case IR_SWIZZLE:
 464       printf("SWIZZLE %s of  (store %p) \n",
 465              _mesa_swizzle_string(n->Store->Swizzle, 0, 0), (void*) n->Store);
 466       _slang_print_ir_tree(n->Children[0], indent + 3);
 467       break;
 468    default:
 469       printf("%s (%p, %p)  (store %p)\n", _slang_ir_name(n->Opcode),
 470              (void*) n->Children[0], (void*) n->Children[1], (void*) n->Store);
 471       _slang_print_ir_tree(n->Children[0], indent+3);
 472       _slang_print_ir_tree(n->Children[1], indent+3);
 473    }
 474 }