1 /*- 2 * Copyright (c) 2003 Mike Barcroft <mike (at) FreeBSD.org> 3 * Copyright (c) 2002 David Schultz <das (at) 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 #pragma once 37 38 #include <endian.h> 39 40 union IEEEf2bits { 41 float f; 42 struct { 43 unsigned int man :23; 44 unsigned int exp :8; 45 unsigned int sign :1; 46 } bits; 47 }; 48 49 #define DBL_MANH_SIZE 20 50 #define DBL_MANL_SIZE 32 51 52 union IEEEd2bits { 53 double d; 54 struct { 55 unsigned int manl :32; 56 unsigned int manh :20; 57 unsigned int exp :11; 58 unsigned int sign :1; 59 } bits; 60 }; 61 62 #ifdef __LP64__ 63 64 union IEEEl2bits { 65 long double e; 66 struct { 67 unsigned long manl :64; 68 unsigned long manh :48; 69 unsigned int exp :15; 70 unsigned int sign :1; 71 } bits; 72 struct { 73 unsigned long manl :64; 74 unsigned long manh :48; 75 unsigned int expsign :16; 76 } xbits; 77 }; 78 79 #define LDBL_NBIT 0 80 #define LDBL_IMPLICIT_NBIT 81 #define mask_nbit_l(u) ((void)0) 82 83 #define LDBL_MANH_SIZE 48 84 #define LDBL_MANL_SIZE 64 85 86 #define LDBL_TO_ARRAY32(u, a) do { \ 87 (a)[0] = (uint32_t)(u).bits.manl; \ 88 (a)[1] = (uint32_t)((u).bits.manl >> 32); \ 89 (a)[2] = (uint32_t)(u).bits.manh; \ 90 (a)[3] = (uint32_t)((u).bits.manh >> 32); \ 91 } while(0) 92 93 #endif // __LP64__ 94
