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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
|
/*
* Mesa 3-D graphics library
*
* Copyright (C) 2005-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. 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 "main/imports.h"
#include "slang_compile.h"
#include "slang_label.h"
#include "main/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_COND, /* conditional expression/predicate */
IR_IF, /* high-level IF/then/else */
/* Children[0] = conditional expression */
/* Children[1] = if-true part */
/* Children[2] = if-else part, or NULL */
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 */
/* Children[0] = loop body */
/* Children[1] = loop tail code, or NULL */
IR_CONT, /* continue loop */
/* n->Parent = ptr to parent IR_LOOP Node */
IR_BREAK, /* break loop */
IR_BREAK_IF_TRUE, /**< Children[0] = the condition expression */
IR_CONT_IF_TRUE,
IR_COPY, /**< assignment/copy */
IR_MOVE, /**< assembly MOV instruction */
/* vector ops: */
IR_ADD, /**< assembly ADD instruction */
IR_SUB,
IR_MUL,
IR_DIV,
IR_DOT4,
IR_DOT3,
IR_DOT2,
IR_NRM4,
IR_NRM3,
IR_CROSS, /* vec3 cross product */
IR_LRP,
IR_CLAMP,
IR_MIN,
IR_MAX,
IR_CMP, /* = (op0 < 0) ? op1 : op2 */
IR_SEQUAL, /* Set if args are equal (vector) */
IR_SNEQUAL, /* Set if args are not equal (vector) */
IR_SGE, /* Set if greater or equal (vector) */
IR_SGT, /* Set if greater than (vector) */
IR_SLE, /* Set if less or equal (vector) */
IR_SLT, /* Set if less than (vector) */
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_EQUAL, /* boolean equality */
IR_NOTEQUAL,/* boolean inequality */
IR_NOT, /* boolean 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_TEX_SH, /* texture lookup, shadow compare */
IR_TEXB_SH, /* texture lookup with LOD bias, shadow compare */
IR_TEXP_SH, /* texture lookup with projection, shadow compare */
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/variables are stored in the various register files.
*
* In the simple case, the File, Index and Size fields indicate where
* a variable is stored. For example, a vec3 variable may be stored
* as (File=PROGRAM_TEMPORARY, Index=6, Size=3). Or, File[Index].
* Or, a program input like color may be stored as
* (File=PROGRAM_INPUT,Index=3,Size=4);
*
* For single-float values, the Swizzle field indicates which component
* of the vector contains the float.
*
* If IsIndirect is set, the storage is accessed through an indirect
* register lookup. The value in question will be located at:
* File[Index + IndirectFile[IndirectIndex]]
*
* This is primary used for indexing arrays. For example, consider this
* GLSL code:
* uniform int i;
* float a[10];
* float x = a[i];
*
* here, storage for a[i] would be described by (File=PROGRAM_TEMPORAY,
* Index=aPos, IndirectFile=PROGRAM_UNIFORM, IndirectIndex=iPos), which
* would mean TEMP[aPos + UNIFORM[iPos]]
*/
struct slang_ir_storage_
{
gl_register_file File; /**< PROGRAM_TEMPORARY, PROGRAM_INPUT, etc */
GLint Index; /**< -1 means unallocated */
GLint Size; /**< number of floats or ints */
GLuint Swizzle; /**< Swizzle AND writemask info */
GLint RefCount; /**< Used during IR tree delete */
GLboolean RelAddr; /* we'll remove this eventually */
GLboolean IsIndirect;
gl_register_file IndirectFile;
GLint IndirectIndex;
GLuint IndirectSwizzle;
GLuint TexTarget; /**< If File==PROGRAM_SAMPLER, one of TEXTURE_x_INDEX */
/** If Parent is non-null, Index is relative to parent.
* The other fields are ignored.
*/
struct slang_ir_storage_ *Parent;
};
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 */
GLfloat Value[4]; /**< If Opcode == IR_FLOAT */
slang_variable *Var; /**< If Opcode == IR_VAR or IR_VAR_DECL */
struct slang_ir_node_ *List; /**< For various linked lists */
struct slang_ir_node_ *Parent; /**< Pointer to logical parent (ie. loop) */
slang_label *Label; /**< Used for branches */
const char *Comment; /**< If Opcode == IR_COMMENT */
} slang_ir_node;
/**
* Assembly and IR info
*/
typedef struct
{
slang_ir_opcode IrOpcode;
const char *IrName;
gl_inst_opcode InstOpcode;
GLuint ResultSize, NumParams;
} slang_ir_info;
extern const slang_ir_info *
_slang_ir_info(slang_ir_opcode opcode);
extern void
_slang_init_ir_storage(slang_ir_storage *st,
gl_register_file file, GLint index, GLint size,
GLuint swizzle);
extern slang_ir_storage *
_slang_new_ir_storage(gl_register_file file, GLint index, GLint size);
extern slang_ir_storage *
_slang_new_ir_storage_swz(gl_register_file file, GLint index, GLint size,
GLuint swizzle);
extern slang_ir_storage *
_slang_new_ir_storage_relative(GLint index, GLint size,
slang_ir_storage *parent);
extern slang_ir_storage *
_slang_new_ir_storage_indirect(gl_register_file file,
GLint index,
GLint size,
gl_register_file indirectFile,
GLint indirectIndex,
GLuint indirectSwizzle);
extern slang_ir_storage *
_slang_new_ir_storage_sampler(GLint sampNum, GLuint texTarget, GLint size);
extern void
_slang_copy_ir_storage(slang_ir_storage *dst, const slang_ir_storage *src);
extern void
_slang_free_ir_tree(slang_ir_node *n);
extern void
_slang_print_ir_tree(const slang_ir_node *n, int indent);
#endif /* SLANG_IR_H */
|
