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_SCOPE,   /* new variable scope (one child) */
  49    IR_LABEL,   /* target of a jump or cjump */
  50    IR_JUMP,    /* unconditional jump */
  51    IR_CJUMP0,  /* conditional jump if zero */
  52    IR_CJUMP1,  /* conditional jump if one (or non-zero) */
  53    IR_COND,    /* conditional expression */
  54    IR_IF,      /* high-level IF */
  55    IR_ELSE,    /* high-level ELSE */
  56    IR_ENDIF,   /* high-level ENDIF */
  57    IR_CALL,    /* call subroutine */
  58    IR_MOVE,
  59    IR_ADD,
  60    IR_SUB,
  61    IR_MUL,
  62    IR_DIV,
  63    IR_DOT4,
  64    IR_DOT3,
  65    IR_CROSS,   /* vec3 cross product */
  66    IR_LRP,
  67    IR_CLAMP,
  68    IR_MIN,
  69    IR_MAX,
  70    IR_SEQUAL,  /* Set if args are equal */
  71    IR_SNEQUAL, /* Set if args are not equal */
  72    IR_SGE,     /* Set if greater or equal */
  73    IR_SGT,     /* Set if greater than */
  74    IR_POW,     /* x^y */
  75    IR_EXP,     /* e^x */
  76    IR_EXP2,    /* 2^x */
  77    IR_LOG2,    /* log base 2 */
  78    IR_RSQ,     /* 1/sqrt() */
  79    IR_RCP,     /* reciprocol */
  80    IR_FLOOR,
  81    IR_FRAC,
  82    IR_ABS,     /* absolute value */
  83    IR_NEG,     /* negate */
  84    IR_DDX,     /* derivative w.r.t. X */
  85    IR_DDY,     /* derivative w.r.t. Y */
  86    IR_SIN,     /* sine */
  87    IR_COS,     /* cosine */
  88    IR_NOISE1,  /* noise(x) */
  89    IR_NOISE2,  /* noise(x, y) */
  90    IR_NOISE3,  /* noise(x, y, z) */
  91    IR_NOISE4,  /* noise(x, y, z, w) */
  92    IR_NOT,     /* logical not */
  93    IR_VAR,     /* variable reference */
  94    IR_VAR_DECL,/* var declaration */
  95    IR_ELEMENT, /* array element */
  96    IR_SWIZZLE, /* swizzled storage access */
  97    IR_TEX,     /* texture lookup */
  98    IR_TEXB,    /* texture lookup with LOD bias */
  99    IR_TEXP,    /* texture lookup with projection */
 100    IR_FLOAT,
 101    IR_FIELD,
 102    IR_I_TO_F,  /* int[4] to float[4] conversion */
 103    IR_F_TO_I,  /* float[4] to int[4] conversion */
 104    IR_KILL     /* fragment kill/discard */
 105 } slang_ir_opcode;
 106
 107
 108 /**
 109  * Describes where data storage is allocated.
 110  */
 111 struct _slang_ir_storage
 112 {
 113    enum register_file File;  /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */
 114    GLint Index;  /**< -1 means unallocated */
 115    GLint Size;  /**< number of floats */
 116    GLuint Swizzle;
 117 };
 118
 119 typedef struct _slang_ir_storage slang_ir_storage;
 120
 121
 122 /**
 123  * Intermediate Representation (IR) tree node
 124  * Basically a binary tree, but IR_LRP has three children.
 125  */
 126 typedef struct slang_ir_node_
 127 {
 128    slang_ir_opcode Opcode;
 129    struct slang_ir_node_ *Children[3];
 130    const char *Comment;
 131    const char *Target;
 132    GLuint Writemask;  /**< If Opcode == IR_MOVE */
 133    GLfloat Value[4];    /**< If Opcode == IR_FLOAT */
 134    slang_variable *Var;
 135    slang_ir_storage *Store;  /**< location of result of this operation */
 136 } slang_ir_node;
 137
 138
 139 #endif /* SLANG_IR_H */