1 /*
2 * Copyright (c) 2012-2015 Etnaviv Project
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 /* Misc util */
25 #ifndef H_ETNA_UTIL
26 #define H_ETNA_UTIL
27
28 #include <math.h>
29 #include "mesa/main/macros.h"
30
31 /* for conditionally setting boolean flag(s): */
32 #define COND(bool, val) ((bool) ? (val) : 0)
33
34 /* float to fixp 5.5 */
35 static inline uint32_t
etna_float_to_fixp55(float f)36 etna_float_to_fixp55(float f)
37 {
38 return S_FIXED(f, 5);
39 }
40
41 /* float to fixp 8.8 */
42 static inline uint32_t
etna_float_to_fixp88(float f)43 etna_float_to_fixp88(float f)
44 {
45 return S_FIXED(f, 8);
46 }
47
48 /* texture size to log2 in fixp 5.5 format */
49 static inline uint32_t
etna_log2_fixp55(unsigned width)50 etna_log2_fixp55(unsigned width)
51 {
52 return etna_float_to_fixp55(log2f((float)width));
53 }
54
55 /* texture size to log2 in fixp 8.8 format */
56 static inline uint32_t
etna_log2_fixp88(unsigned width)57 etna_log2_fixp88(unsigned width)
58 {
59 return etna_float_to_fixp88(log2f((float)width));
60 }
61
62 /* float to fixp 16.16 */
63 static inline uint32_t
etna_f32_to_fixp16(float f)64 etna_f32_to_fixp16(float f)
65 {
66 return S_FIXED(f, 16);
67 }
68
69 #endif
70