2 * Copyright (c) 2012-2015 Etnaviv Project
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:
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
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.
30 /* for conditionally setting boolean flag(s): */
31 #define COND(bool, val) ((bool) ? (val) : 0)
33 #define foreach_bit(b, mask) \
34 for (uint32_t _m = (mask); _m && ({(b) = u_bit_scan(&_m); 1;});)
36 /* align to a value divisable by granularity >= value, works only for powers of two */
37 static inline uint32_t
38 etna_align_up(uint32_t value
, uint32_t granularity
)
40 return (value
+ (granularity
- 1)) & (~(granularity
- 1));
43 /* clamped float [0.0 .. 1.0] -> [0 .. 255] */
45 etna_cfloat_to_uint8(float f
)
50 if (f
>= (1.0f
- 1.0f
/ 256.0f
))
56 /* clamped float [0.0 .. 1.0] -> [0 .. (1<<bits)-1] */
57 static inline uint32_t
58 etna_cfloat_to_uintN(float f
, int bits
)
63 if (f
>= (1.0f
- 1.0f
/ (1 << bits
)))
64 return (1 << bits
) - 1;
66 return f
* (1 << bits
);
70 #define RCPLOG2 (1.4426950408889634f)
72 /* float to fixp 5.5 */
73 static inline uint32_t
74 etna_float_to_fixp55(float f
)
82 return (int32_t)(f
* 32.0f
+ 0.5f
);
85 /* float to fixp 8.8 */
86 static inline uint32_t
87 etna_float_to_fixp88(float f
)
89 if (f
>= (32767.0 - 1.0f
) / 256.0f
)
95 return (int32_t)(f
* 256.0f
+ 0.5f
);
98 /* texture size to log2 in fixp 5.5 format */
99 static inline uint32_t
100 etna_log2_fixp55(unsigned width
)
102 return etna_float_to_fixp55(logf((float)width
) * RCPLOG2
);
105 /* texture size to log2 in fixp 8.8 format */
106 static inline uint32_t
107 etna_log2_fixp88(unsigned width
)
109 return etna_float_to_fixp88(logf((float)width
) * RCPLOG2
);
112 /* float to fixp 16.16 */
113 static inline uint32_t
114 etna_f32_to_fixp16(float f
)
116 if (f
>= (32768.0f
- 1.0f
/ 65536.0f
))
122 return (int32_t)(f
* 65536.0f
+ 0.5f
);