1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#ifndef _HALF_FLOAT_H_
26#define _HALF_FLOAT_H_
27
28#include <stdbool.h>
29#include <stdint.h>
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35#define FP16_ONE     0x3C00
36#define FP16_ZERO    0
37
38uint16_t _mesa_float_to_half(float val);
39float _mesa_half_to_float(uint16_t val);
40uint8_t _mesa_half_to_unorm8(uint16_t v);
41uint16_t _mesa_uint16_div_64k_to_half(uint16_t v);
42
43static inline bool
44_mesa_half_is_negative(uint16_t h)
45{
46   return !!(h & 0x8000);
47}
48
49
50#ifdef __cplusplus
51} /* extern C */
52#endif
53
54#endif /* _HALF_FLOAT_H_ */
55