src/mesa/shader/slang/slang_ir.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.3
   4  *
   5  * Copyright (C) 2005-2007  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  * \file slang_ir.h
  27  * Mesa GLSL Intermediate Representation tree types and constants.
  28  * \author Brian Paul
  29  */
  30
  31
  32 #ifndef SLANG_IR_H
  33 #define SLANG_IR_H
  34
  35
  36 #include "imports.h"
  37 #include "slang_compile.h"
  38 #include "mtypes.h"
  39
  40
  41 /**
  42  * Intermediate Representation opcode
  43  */
  44 typedef enum
  45 {
  46    IR_NOP = 0,
  47    IR_SEQ,     /* sequence (eval left, then right) */
  48    IR_LABEL,   /* target of a jump or cjump */
  49    IR_JUMP,    /* unconditional jump */
  50    IR_CJUMP,   /* conditional jump */
  51    IR_COND,    /* conditional expression */
  52    IR_CALL,    /* call subroutine */
  53    IR_MOVE,
  54    IR_ADD,
  55    IR_SUB,
  56    IR_MUL,
  57    IR_DIV,
  58    IR_DOT4,
  59    IR_DOT3,
  60    IR_CROSS,   /* vec3 cross product */
  61    IR_MIN,
  62    IR_MAX,
  63    IR_SEQUAL,  /* Set if not equal */
  64    IR_SNEQUAL, /* Set if equal */
  65    IR_SGE,     /* Set if greater or equal */
  66    IR_SGT,     /* Set if greater than */
  67    IR_POW,     /* x^y */
  68    IR_EXP,     /* e^x */
  69    IR_EXP2,    /* 2^x */
  70    IR_LOG2,    /* log base 2 */
  71    IR_RSQ,     /* 1/sqrt() */
  72    IR_RCP,     /* reciprocol */
  73    IR_FLOOR,
  74    IR_FRAC,
  75    IR_ABS,     /* absolute value */
  76    IR_NEG,     /* negate */
  77    IR_DDX,     /* derivative w.r.t. X */
  78    IR_DDY,     /* derivative w.r.t. Y */
  79    IR_SIN,     /* sine */
  80    IR_COS,     /* cosine */
  81    IR_NOT,     /* logical not */
  82    IR_VAR,     /* variable reference */
  83    IR_VAR_DECL,/* var declaration */
  84    IR_TEX,     /* texture lookup */
  85    IR_TEXB,    /* texture lookup with LOD bias */
  86    IR_TEXP,    /* texture lookup with projection */
  87    IR_FLOAT,
  88    IR_FIELD,
  89    IR_I_TO_F
  90 } slang_ir_opcode;
  91
  92
  93 /**
  94  * Describes where data storage is allocated.
  95  */
  96 typedef struct
  97 {
  98    enum register_file File;  /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */
  99    GLint Index;  /**< -1 means unallocated */
 100    GLint Size;  /**< number of floats */
 101 } slang_ir_storage;
 102
 103
 104 /**
 105  * Intermediate Representation (IR) tree node
 106  */
 107 typedef struct slang_ir_node_
 108 {
 109    slang_ir_opcode Opcode;
 110    struct slang_ir_node_ *Children[2];
 111    const char *Comment;
 112    const char *Target;
 113    GLuint Swizzle;
 114    GLuint Writemask;  /**< If Opcode == IR_MOVE */
 115    GLfloat Value[4];    /**< If Opcode == IR_FLOAT */
 116    slang_variable *Var;
 117    slang_ir_storage *Store;
 118 } slang_ir_node;
 119
 120
 121 #endif /* SLANG_IR_H */