summaryrefslogtreecommitdiffstats
path: root/src/mesa/shader/slang/slang_ir.h
blob: 3c5526e3c547ad2c5a8e1b4175c15c042c064e45 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
 * Mesa 3-D graphics library
 * Version:  6.5.3
 *
 * Copyright (C) 2005-2007  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \file slang_ir.h
 * Mesa GLSL Intermediate Representation tree types and constants.
 * \author Brian Paul
 */


#ifndef SLANG_IR_H
#define SLANG_IR_H


#include "imports.h"
#include "slang_compile.h"
#include "slang_label.h"
#include "mtypes.h"


/**
 * Intermediate Representation opcodes
 */
typedef enum
{
   IR_NOP = 0,
   IR_SEQ,     /* sequence (eval left, then right) */
   IR_SCOPE,   /* new variable scope (one child) */

   IR_LABEL,   /* target of a jump or cjump */
   IR_JUMP,    /* unconditional jump */
   IR_COND,    /* conditional expression/predicate */

   IR_IF,      /* high-level IF/then/else */

   IR_BEGIN_SUB, /* begin subroutine */
   IR_END_SUB,   /* end subroutine */
   IR_RETURN,    /* return from subroutine */
   IR_CALL,      /* call subroutine */

   IR_LOOP,      /* high-level loop-begin / loop-end */
   IR_CONT,      /* continue loop */
   IR_BREAK,     /* break loop */

   IR_BREAK_IF_TRUE,
   IR_BREAK_IF_FALSE,
   IR_CONT_IF_TRUE,
   IR_CONT_IF_FALSE,

   IR_MOVE,
   IR_ADD,
   IR_SUB,
   IR_MUL,
   IR_DIV,
   IR_DOT4,
   IR_DOT3,
   IR_CROSS,   /* vec3 cross product */
   IR_LRP,
   IR_CLAMP,
   IR_MIN,
   IR_MAX,
   IR_SEQUAL,  /* Set if args are equal */
   IR_SNEQUAL, /* Set if args are not equal */
   IR_SGE,     /* Set if greater or equal */
   IR_SGT,     /* Set if greater than */
   IR_SLE,     /* Set if less or equal */
   IR_SLT,     /* Set if less than */
   IR_POW,     /* x^y */
   IR_EXP,     /* e^x */
   IR_EXP2,    /* 2^x */
   IR_LOG2,    /* log base 2 */
   IR_RSQ,     /* 1/sqrt() */
   IR_RCP,     /* reciprocol */
   IR_FLOOR,
   IR_FRAC,
   IR_ABS,     /* absolute value */
   IR_NEG,     /* negate */
   IR_DDX,     /* derivative w.r.t. X */
   IR_DDY,     /* derivative w.r.t. Y */
   IR_SIN,     /* sine */
   IR_COS,     /* cosine */
   IR_NOISE1,  /* noise(x) */
   IR_NOISE2,  /* noise(x, y) */
   IR_NOISE3,  /* noise(x, y, z) */
   IR_NOISE4,  /* noise(x, y, z, w) */
   IR_NOT,     /* logical not */

   IR_VAR,     /* variable reference */
   IR_VAR_DECL,/* var declaration */

   IR_ELEMENT, /* array element */
   IR_FIELD,   /* struct field */
   IR_SWIZZLE, /* swizzled storage access */

   IR_TEX,     /* texture lookup */
   IR_TEXB,    /* texture lookup with LOD bias */
   IR_TEXP,    /* texture lookup with projection */

   IR_FLOAT,
   IR_I_TO_F,  /* int[4] to float[4] conversion */
   IR_F_TO_I,  /* float[4] to int[4] conversion */

   IR_KILL     /* fragment kill/discard */
} slang_ir_opcode;


/**
 * Describes where data storage is allocated.
 */
struct _slang_ir_storage
{
   enum register_file File;  /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */
   GLint Index;  /**< -1 means unallocated */
   GLint Size;  /**< number of floats */
   GLuint Swizzle;
};

typedef struct _slang_ir_storage slang_ir_storage;


/**
 * Intermediate Representation (IR) tree node
 * Basically a binary tree, but IR_LRP and IR_CLAMP have three children.
 */
typedef struct slang_ir_node_
{
   slang_ir_opcode Opcode;
   struct slang_ir_node_ *Children[3];
   slang_ir_storage *Store;  /**< location of result of this operation */
   GLint InstLocation;  /**< Location of instruction emitted for this node */

   /** special fields depending on Opcode: */
   const char *Field;  /**< If Opcode == IR_FIELD */
   int FieldOffset;  /**< If Opcode == IR_FIELD */
   GLuint Writemask;  /**< If Opcode == IR_MOVE */
   GLfloat Value[4];    /**< If Opcode == IR_FLOAT */
   slang_variable *Var;  /**< If Opcode == IR_VAR or IR_VAR_DECL */
   struct slang_ir_node_ *BranchNode;  /**< Used for branching instructions */
   slang_label *Label;  /**< Used for branches */
} slang_ir_node;


#endif /* SLANG_IR_H */