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