1/*-
2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
3 * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30// ANDROID changed:
31// - keep only little endian variants as they're the only one supported.
32// - add long double structures here instead of _fpmath.h.
33// - android uses 128 bits long doubles for LP64, so the structure and macros
34//   were reworked for the quad precision ieee representation.
35
36#ifndef _FPMATH_
37#define _FPMATH_
38
39#include <endian.h>
40
41union IEEEf2bits {
42  float f;
43  struct {
44    unsigned int man   :23;
45    unsigned int exp   :8;
46    unsigned int sign  :1;
47  } bits;
48};
49
50#define DBL_MANH_SIZE  20
51#define DBL_MANL_SIZE  32
52
53union IEEEd2bits {
54  double  d;
55  struct {
56    unsigned int manl  :32;
57    unsigned int manh  :20;
58    unsigned int exp   :11;
59    unsigned int sign  :1;
60  } bits;
61};
62
63#ifdef __LP64__
64
65union IEEEl2bits {
66  long double e;
67  struct {
68    unsigned long manl  :64;
69    unsigned long manh  :48;
70    unsigned int  exp   :15;
71    unsigned int  sign  :1;
72  } bits;
73  struct {
74    unsigned long manl     :64;
75    unsigned long manh     :48;
76    unsigned int  expsign  :16;
77  } xbits;
78};
79
80#define LDBL_NBIT  0
81#define LDBL_IMPLICIT_NBIT
82#define mask_nbit_l(u)  ((void)0)
83
84#define LDBL_MANH_SIZE  48
85#define LDBL_MANL_SIZE  64
86
87#define LDBL_TO_ARRAY32(u, a) do {           \
88  (a)[0] = (uint32_t)(u).bits.manl;          \
89  (a)[1] = (uint32_t)((u).bits.manl >> 32);  \
90  (a)[2] = (uint32_t)(u).bits.manh;          \
91  (a)[3] = (uint32_t)((u).bits.manh >> 32);  \
92} while(0)
93
94#endif // __LP64__
95
96#endif // _FPMATH_
97