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 */
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.
36 #ifndef _FPMATH_
37 #define _FPMATH_
39 #include <endian.h>
41 union IEEEf2bits {
42 float f;
43 struct {
44 unsigned int man :23;
45 unsigned int exp :8;
46 unsigned int sign :1;
47 } bits;
48 };
50 #define DBL_MANH_SIZE 20
51 #define DBL_MANL_SIZE 32
53 union 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 };
63 #ifdef __LP64__
65 union 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 };
80 #define LDBL_NBIT 0
81 #define LDBL_IMPLICIT_NBIT
82 #define mask_nbit_l(u) ((void)0)
84 #define LDBL_MANH_SIZE 48
85 #define LDBL_MANL_SIZE 64
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)
94 #endif // __LP64__
96 #endif // _FPMATH_