2 * Mesa 3-D graphics library
5 * Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
27 * Mesa GLSL Intermediate Representation tree types and constants.
37 #include "slang_compile.h"
42 * Intermediate Representation opcode
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 */
65 IR_CROSS
, /* vec3 cross product */
68 IR_SEQUAL
, /* Set if args are equal */
69 IR_SNEQUAL
, /* Set if args are not equal */
70 IR_SGE
, /* Set if greater or equal */
71 IR_SGT
, /* Set if greater than */
75 IR_LOG2
, /* log base 2 */
76 IR_RSQ
, /* 1/sqrt() */
77 IR_RCP
, /* reciprocol */
80 IR_ABS
, /* absolute value */
82 IR_DDX
, /* derivative w.r.t. X */
83 IR_DDY
, /* derivative w.r.t. Y */
86 IR_NOT
, /* logical not */
87 IR_VAR
, /* variable reference */
88 IR_VAR_DECL
,/* var declaration */
89 IR_ELEMENT
, /* array element */
90 IR_SWIZZLE
, /* swizzled storage access */
91 IR_TEX
, /* texture lookup */
92 IR_TEXB
, /* texture lookup with LOD bias */
93 IR_TEXP
, /* texture lookup with projection */
96 IR_I_TO_F
, /* int[4] to float[4] conversion */
97 IR_F_TO_I
, /* float[4] to int[4] conversion */
98 IR_KILL
/* fragment kill/discard */
103 * Describes where data storage is allocated.
107 enum register_file File
; /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */
108 GLint Index
; /**< -1 means unallocated */
109 GLint Size
; /**< number of floats */
115 * Intermediate Representation (IR) tree node
117 typedef struct slang_ir_node_
119 slang_ir_opcode Opcode
;
120 struct slang_ir_node_
*Children
[2];
123 GLuint Writemask
; /**< If Opcode == IR_MOVE */
124 GLfloat Value
[4]; /**< If Opcode == IR_FLOAT */
126 slang_ir_storage
*Store
; /**< location of result of this operation */
130 #endif /* SLANG_IR_H */