2 * Copyright (c) 2015 Dag-Erling Smørgrav
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef FP16_H_INCLUDED
30 #define FP16_H_INCLUDED
32 typedef signed long long fp16_t;
34 #define ItoFP16(n) ((signed long long)(n) << 16)
35 #define FP16toI(n) ((signed long long)(n) >> 16)
38 #define FP16toF(n) ((n) / 65536.0)
43 fp16_add(fp16_t a, fp16_t b)
49 /* subtract b from a */
51 fp16_sub(fp16_t a, fp16_t b)
59 fp16_mul(fp16_t a, fp16_t b)
67 fp16_div(fp16_t a, fp16_t b)
70 return ((a << 16) / b);
74 fp16_t fp16_sqrt(fp16_t);
76 #define FP16_2PI 411774
77 #define FP16_PI 205887
78 #define FP16_PI_2 102943
79 #define FP16_PI_4 51471
82 fp16_t fp16_sin(fp16_t);
83 fp16_t fp16_cos(fp16_t);