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
|
/**************************************************************************
*
* Copyright 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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
* Helper arithmetic functions.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#ifndef LP_BLD_ARIT_H
#define LP_BLD_ARIT_H
#include <llvm-c/Core.h>
#define LP_MAX_VECTOR_LENGTH 16
/*
* Types
*/
enum lp_type_kind {
LP_TYPE_INTEGER = 0,
LP_TYPE_FLOAT = 1,
LP_TYPE_FIXED = 2
};
/**
* The LLVM type system can't conveniently express all the things we care about
* on the types used for intermediate computations, such as signed vs unsigned,
* normalized values, or fixed point.
*/
union lp_type {
struct {
/**
* Integer. floating-point, or fixed point as established by the
* lp_build_type_kind enum above.
*/
unsigned kind:2;
/**
* Whether it can represent negative values or not.
*
* Floating point values
*/
unsigned sign:1;
/**
* Whether values are normalized to fit [0, 1] interval, or [-1, 1] interval for
* signed types.
*
* For integer types
*
* It makes no sense to use this with fixed point values.
*/
unsigned norm:1;
/**
* Element width.
*
* For fixed point values, the fixed point is assumed to be at half the width.
*/
unsigned width:14;
/**
* Vector length.
*
* width*length should be a power of two greater or equal to height.
*
* Several functions can only cope with vectors of length up to
* LP_MAX_VECTOR_LENGTH, so you may need to increase that value if you
* want to represent bigger vectors.
*/
unsigned length:14;
};
uint32_t value;
};
LLVMTypeRef
lp_build_elem_type(union lp_type type);
LLVMTypeRef
lp_build_vec_type(union lp_type type);
boolean
lp_check_elem_type(union lp_type type, LLVMTypeRef elem_type);
boolean
lp_check_vec_type(union lp_type type, LLVMTypeRef vec_type);
/*
* Constants
*/
LLVMValueRef
lp_build_const_aos(union lp_type type,
double r, double g, double b, double a,
const unsigned char *swizzle);
/*
* Basic arithmetic
*/
LLVMValueRef
lp_build_add(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero);
LLVMValueRef
lp_build_sub(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero);
LLVMValueRef
lp_build_mul(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero,
LLVMValueRef one);
LLVMValueRef
lp_build_min(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b);
LLVMValueRef
lp_build_max(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b);
/*
* Satured arithmetic
*/
LLVMValueRef
lp_build_add_sat(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero,
LLVMValueRef one);
LLVMValueRef
lp_build_sub_sat(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero,
LLVMValueRef one);
LLVMValueRef
lp_build_min_sat(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero,
LLVMValueRef one);
LLVMValueRef
lp_build_max_sat(LLVMBuilderRef builder,
LLVMValueRef a,
LLVMValueRef b,
LLVMValueRef zero,
LLVMValueRef one);
#endif /* !LP_BLD_ARIT_H */
|
