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_print.h"
  31
  32
  33 static const slang_ir_info IrInfo[] = {
  34    /* binary ops */
  35    { IR_ADD, "IR_ADD", OPCODE_ADD, 4, 2 },
  36    { IR_SUB, "IR_SUB", OPCODE_SUB, 4, 2 },
  37    { IR_MUL, "IR_MUL", OPCODE_MUL, 4, 2 },
  38    { IR_DIV, "IR_DIV", OPCODE_NOP, 0, 2 }, /* XXX broke */
  39    { IR_DOT4, "IR_DOT_4", OPCODE_DP4, 1, 2 },
  40    { IR_DOT3, "IR_DOT_3", OPCODE_DP3, 1, 2 },
  41    { IR_CROSS, "IR_CROSS", OPCODE_XPD, 3, 2 },
  42    { IR_LRP, "IR_LRP", OPCODE_LRP, 4, 3 },
  43    { IR_MIN, "IR_MIN", OPCODE_MIN, 4, 2 },
  44    { IR_MAX, "IR_MAX", OPCODE_MAX, 4, 2 },
  45    { IR_CLAMP, "IR_CLAMP", OPCODE_NOP, 4, 3 }, /* special case: emit_clamp() */
  46    { IR_SEQUAL, "IR_SEQUAL", OPCODE_SEQ, 4, 2 },
  47    { IR_SNEQUAL, "IR_SNEQUAL", OPCODE_SNE, 4, 2 },
  48    { IR_SGE, "IR_SGE", OPCODE_SGE, 4, 2 },
  49    { IR_SGT, "IR_SGT", OPCODE_SGT, 4, 2 },
  50    { IR_SLE, "IR_SLE", OPCODE_SLE, 4, 2 },
  51    { IR_SLT, "IR_SLT", OPCODE_SLT, 4, 2 },
  52    { IR_POW, "IR_POW", OPCODE_POW, 1, 2 },
  53    { IR_EQUAL, "IR_EQUAL", OPCODE_NOP, 1, 2 },
  54    { IR_NOTEQUAL, "IR_NOTEQUAL", OPCODE_NOP, 1, 2 },
  55
  56    /* unary ops */
  57    { IR_MOVE, "IR_MOVE", OPCODE_MOV, 4, 1 },
  58    { IR_I_TO_F, "IR_I_TO_F", OPCODE_MOV, 4, 1 },  /* int[4] to float[4] */
  59    { IR_F_TO_I, "IR_F_TO_I", OPCODE_INT, 4, 1 }, /* 4 floats to 4 ints */
  60    { IR_EXP, "IR_EXP", OPCODE_EXP, 1, 1 },
  61    { IR_EXP2, "IR_EXP2", OPCODE_EX2, 1, 1 },
  62    { IR_LOG2, "IR_LOG2", OPCODE_LG2, 1, 1 },
  63    { IR_RSQ, "IR_RSQ", OPCODE_RSQ, 1, 1 },
  64    { IR_RCP, "IR_RCP", OPCODE_RCP, 1, 1 },
  65    { IR_FLOOR, "IR_FLOOR", OPCODE_FLR, 4, 1 },
  66    { IR_FRAC, "IR_FRAC", OPCODE_FRC, 4, 1 },
  67    { IR_ABS, "IR_ABS", OPCODE_ABS, 4, 1 },
  68    { IR_NEG, "IR_NEG", OPCODE_NOP, 4, 1 }, /* special case: emit_negation() */
  69    { IR_DDX, "IR_DDX", OPCODE_DDX, 4, 1 },
  70    { IR_DDY, "IR_DDY", OPCODE_DDY, 4, 1 },
  71    { IR_SIN, "IR_SIN", OPCODE_SIN, 1, 1 },
  72    { IR_COS, "IR_COS", OPCODE_COS, 1, 1 },
  73    { IR_NOISE1, "IR_NOISE1", OPCODE_NOISE1, 1, 1 },
  74    { IR_NOISE2, "IR_NOISE2", OPCODE_NOISE2, 1, 1 },
  75    { IR_NOISE3, "IR_NOISE3", OPCODE_NOISE3, 1, 1 },
  76    { IR_NOISE4, "IR_NOISE4", OPCODE_NOISE4, 1, 1 },
  77
  78    /* other */
  79    { IR_SEQ, "IR_SEQ", OPCODE_NOP, 0, 0 },
  80    { IR_SCOPE, "IR_SCOPE", OPCODE_NOP, 0, 0 },
  81    { IR_LABEL, "IR_LABEL", OPCODE_NOP, 0, 0 },
  82    { IR_IF, "IR_IF", OPCODE_NOP, 0, 0 },
  83    { IR_KILL, "IR_KILL", OPCODE_NOP, 0, 0 },
  84    { IR_COND, "IR_COND", OPCODE_NOP, 0, 0 },
  85    { IR_CALL, "IR_CALL", OPCODE_NOP, 0, 0 },
  86    { IR_COPY, "IR_COPY", OPCODE_NOP, 0, 1 },
  87    { IR_NOT, "IR_NOT", OPCODE_NOP, 1, 1 },
  88    { IR_VAR, "IR_VAR", OPCODE_NOP, 0, 0 },
  89    { IR_VAR_DECL, "IR_VAR_DECL", OPCODE_NOP, 0, 0 },
  90    { IR_TEX, "IR_TEX", OPCODE_TEX, 4, 1 },
  91    { IR_TEXB, "IR_TEXB", OPCODE_TXB, 4, 1 },
  92    { IR_TEXP, "IR_TEXP", OPCODE_TXP, 4, 1 },
  93    { IR_FLOAT, "IR_FLOAT", OPCODE_NOP, 0, 0 }, /* float literal */
  94    { IR_FIELD, "IR_FIELD", OPCODE_NOP, 0, 0 },
  95    { IR_ELEMENT, "IR_ELEMENT", OPCODE_NOP, 0, 0 },
  96    { IR_SWIZZLE, "IR_SWIZZLE", OPCODE_NOP, 0, 0 },
  97    { IR_NOP, "IR_NOP", OPCODE_NOP, 0, 0 },
  98    { 0, NULL, 0, 0, 0 }
  99 };
 100
 101
 102 const slang_ir_info *
 103 _slang_ir_info(slang_ir_opcode opcode)
 104 {
 105    GLuint i;
 106    for (i = 0; IrInfo[i].IrName; i++) {
 107       if (IrInfo[i].IrOpcode == opcode) {
 108          return IrInfo + i;
 109       }
 110    }
 111    return NULL;
 112 }
 113
 114
 115 /**
 116  * Return a new slang_ir_storage object.
 117  */
 118 slang_ir_storage *
 119 _slang_new_ir_storage(enum register_file file, GLint index, GLint size)
 120 {
 121    slang_ir_storage *st;
 122    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 123    if (st) {
 124       st->File = file;
 125       st->Index = index;
 126       st->Size = size;
 127       st->Swizzle = SWIZZLE_NOOP;
 128       st->Parent = NULL;
 129    }
 130    return st;
 131 }
 132
 133
 134 /**
 135  * Return a new slang_ir_storage object.
 136  */
 137 slang_ir_storage *
 138 _slang_new_ir_storage_swz(enum register_file file, GLint index, GLint size,
 139                           GLuint swizzle)
 140 {
 141    slang_ir_storage *st;
 142    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 143    if (st) {
 144       st->File = file;
 145       st->Index = index;
 146       st->Size = size;
 147       st->Swizzle = swizzle;
 148       st->Parent = NULL;
 149    }
 150    return st;
 151 }
 152
 153
 154 /**
 155  * Return a new slang_ir_storage object.
 156  */
 157 slang_ir_storage *
 158 _slang_new_ir_storage_relative(GLint index, GLint size,
 159                                slang_ir_storage *parent)
 160 {
 161    slang_ir_storage *st;
 162    st = (slang_ir_storage *) _slang_alloc(sizeof(slang_ir_storage));
 163    if (st) {
 164       st->File = PROGRAM_UNDEFINED;
 165       st->Index = index;
 166       st->Size = size;
 167       st->Swizzle = SWIZZLE_NOOP;
 168       st->Parent = parent;
 169    }
 170    return st;
 171 }
 172
 173
 174
 175 static const char *
 176 _slang_ir_name(slang_ir_opcode opcode)
 177 {
 178    return _slang_ir_info(opcode)->IrName;
 179 }
 180
 181
 182
 183 #if 0 /* no longer needed with mempool */
 184 /**
 185  * Since many IR nodes might point to the same IR storage info, we need
 186  * to be careful when deleting things.
 187  * Before deleting an IR tree, traverse it and do refcounting on the
 188  * IR storage nodes.  Use the refcount info during delete to free things
 189  * properly.
 190  */
 191 static void
 192 _slang_refcount_storage(slang_ir_node *n)
 193 {
 194    GLuint i;
 195    if (!n)
 196       return;
 197    if (n->Store)
 198       n->Store->RefCount++;
 199    for (i = 0; i < 3; i++)
 200       _slang_refcount_storage(n->Children[i]);
 201 }
 202 #endif
 203
 204
 205 static void
 206 _slang_free_ir(slang_ir_node *n)
 207 {
 208    GLuint i;
 209    if (!n)
 210       return;
 211
 212 #if 0
 213    if (n->Store) {
 214       n->Store->RefCount--;
 215       if (n->Store->RefCount == 0) {
 216          _slang_free(n->Store);
 217          n->Store = NULL;
 218       }
 219    }
 220 #endif
 221
 222    for (i = 0; i < 3; i++)
 223       _slang_free_ir(n->Children[i]);
 224    /* Do not free n->List since it's a child elsewhere */
 225    _slang_free(n);
 226 }
 227
 228
 229 /**
 230  * Recursively free an IR tree.
 231  */
 232 void
 233 _slang_free_ir_tree(slang_ir_node *n)
 234 {
 235 #if 0
 236    _slang_refcount_storage(n);
 237 #endif
 238    _slang_free_ir(n);
 239 }
 240
 241
 242
 243 static const char *
 244 writemask_string(GLuint writemask)
 245 {
 246    static char s[6];
 247    GLuint i, j = 0;
 248    s[j++] = '.';
 249    for (i = 0; i < 4; i++) {
 250       if (writemask & (1 << i))
 251          s[j++] = "xyzw"[i];
 252    }
 253    s[j] = 0;
 254    return s;
 255 }
 256
 257
 258 static const char *
 259 storage_string(const slang_ir_storage *st)
 260 {
 261    static const char *files[] = {
 262       "TEMP",
 263       "LOCAL_PARAM",
 264       "ENV_PARAM",
 265       "STATE",
 266       "INPUT",
 267       "OUTPUT",
 268       "NAMED_PARAM",
 269       "CONSTANT",
 270       "UNIFORM",
 271       "VARYING",
 272       "WRITE_ONLY",
 273       "ADDRESS",
 274       "SAMPLER",
 275       "UNDEFINED"
 276    };
 277    static char s[100];
 278    assert(Elements(files) == PROGRAM_FILE_MAX);
 279 #if 0
 280    if (st->Size == 1)
 281       sprintf(s, "%s[%d]", files[st->File], st->Index);
 282    else
 283       sprintf(s, "%s[%d..%d]", files[st->File], st->Index,
 284               st->Index + st->Size - 1);
 285 #endif
 286    assert(st->File < (GLint) (sizeof(files) / sizeof(files[0])));
 287    sprintf(s, "%s[%d]", files[st->File], st->Index);
 288    return s;
 289 }
 290
 291
 292 static void
 293 spaces(int n)
 294 {
 295    while (n-- > 0) {
 296       printf(" ");
 297    }
 298 }
 299
 300
 301 void
 302 _slang_print_ir_tree(const slang_ir_node *n, int indent)
 303 {
 304 #define IND 0
 305
 306    if (!n)
 307       return;
 308 #if !IND
 309    if (n->Opcode != IR_SEQ)
 310 #else
 311       printf("%3d:", indent);
 312 #endif
 313       spaces(indent);
 314
 315    switch (n->Opcode) {
 316    case IR_SEQ:
 317 #if IND
 318       printf("SEQ  at %p\n", (void*) n);
 319 #endif
 320       assert(n->Children[0]);
 321       assert(n->Children[1]);
 322       _slang_print_ir_tree(n->Children[0], indent + IND);
 323       _slang_print_ir_tree(n->Children[1], indent + IND);
 324       break;
 325    case IR_SCOPE:
 326       printf("NEW SCOPE\n");
 327       assert(!n->Children[1]);
 328       _slang_print_ir_tree(n->Children[0], indent + 3);
 329       break;
 330    case IR_COPY:
 331       printf("COPY (writemask = %s)\n", writemask_string(n->Writemask));
 332       _slang_print_ir_tree(n->Children[0], indent+3);
 333       _slang_print_ir_tree(n->Children[1], indent+3);
 334       break;
 335    case IR_LABEL:
 336       printf("LABEL: %s\n", n->Label->Name);
 337       break;
 338    case IR_COND:
 339       printf("COND\n");
 340       _slang_print_ir_tree(n->Children[0], indent + 3);
 341       break;
 342
 343    case IR_IF:
 344       printf("IF \n");
 345       _slang_print_ir_tree(n->Children[0], indent+3);
 346       spaces(indent);
 347       printf("THEN\n");
 348       _slang_print_ir_tree(n->Children[1], indent+3);
 349       if (n->Children[2]) {
 350          spaces(indent);
 351          printf("ELSE\n");
 352          _slang_print_ir_tree(n->Children[2], indent+3);
 353       }
 354       spaces(indent);
 355       printf("ENDIF\n");
 356       break;
 357
 358    case IR_BEGIN_SUB:
 359       printf("BEGIN_SUB\n");
 360       break;
 361    case IR_END_SUB:
 362       printf("END_SUB\n");
 363       break;
 364    case IR_RETURN:
 365       printf("RETURN\n");
 366       break;
 367    case IR_CALL:
 368       printf("CALL %s\n", n->Label->Name);
 369       break;
 370
 371    case IR_LOOP:
 372       printf("LOOP\n");
 373       _slang_print_ir_tree(n->Children[0], indent+3);
 374       if (n->Children[1]) {
 375          spaces(indent);
 376          printf("TAIL:\n");
 377          _slang_print_ir_tree(n->Children[1], indent+3);
 378       }
 379       spaces(indent);
 380       printf("ENDLOOP\n");
 381       break;
 382    case IR_CONT:
 383       printf("CONT\n");
 384       break;
 385    case IR_BREAK:
 386       printf("BREAK\n");
 387       break;
 388    case IR_BREAK_IF_TRUE:
 389       printf("BREAK_IF_TRUE\n");
 390       _slang_print_ir_tree(n->Children[0], indent+3);
 391       break;
 392    case IR_CONT_IF_TRUE:
 393       printf("CONT_IF_TRUE\n");
 394       _slang_print_ir_tree(n->Children[0], indent+3);
 395       break;
 396
 397    case IR_VAR:
 398       printf("VAR %s%s at %s  store %p\n",
 399              (n->Var ? (char *) n->Var->a_name : "TEMP"),
 400              _mesa_swizzle_string(n->Store->Swizzle, 0, 0),
 401              storage_string(n->Store), (void*) n->Store);
 402       break;
 403    case IR_VAR_DECL:
 404       printf("VAR_DECL %s (%p) at %s  store %p\n",
 405              (n->Var ? (char *) n->Var->a_name : "TEMP"),
 406              (void*) n->Var, storage_string(n->Store),
 407              (void*) n->Store);
 408       break;
 409    case IR_FIELD:
 410       printf("FIELD %s of\n", n->Field);
 411       _slang_print_ir_tree(n->Children[0], indent+3);
 412       break;
 413    case IR_FLOAT:
 414       printf("FLOAT %g %g %g %g\n",
 415              n->Value[0], n->Value[1], n->Value[2], n->Value[3]);
 416       break;
 417    case IR_I_TO_F:
 418       printf("INT_TO_FLOAT\n");
 419       _slang_print_ir_tree(n->Children[0], indent+3);
 420       break;
 421    case IR_F_TO_I:
 422       printf("FLOAT_TO_INT\n");
 423       _slang_print_ir_tree(n->Children[0], indent+3);
 424       break;
 425    case IR_SWIZZLE:
 426       printf("SWIZZLE %s of  (store %p) \n",
 427              _mesa_swizzle_string(n->Store->Swizzle, 0, 0), (void*) n->Store);
 428       _slang_print_ir_tree(n->Children[0], indent + 3);
 429       break;
 430    default:
 431       printf("%s (%p, %p)  (store %p)\n", _slang_ir_name(n->Opcode),
 432              (void*) n->Children[0], (void*) n->Children[1], (void*) n->Store);
 433       _slang_print_ir_tree(n->Children[0], indent+3);
 434       _slang_print_ir_tree(n->Children[1], indent+3);
 435    }
 436 }