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 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 }; 49 50 #define DBL_MANH_SIZE 20 51 #define DBL_MANL_SIZE 32 52 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 }; 62 63 #ifdef __LP64__ 64 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 }; 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