_fpmath.h revision 267654
1185377Ssam/*- 2185377Ssam * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG> 3185377Ssam * All rights reserved. 4185377Ssam * 5185377Ssam * Redistribution and use in source and binary forms, with or without 6185377Ssam * modification, are permitted provided that the following conditions 7185377Ssam * are met: 8185377Ssam * 1. Redistributions of source code must retain the above copyright 9185377Ssam * notice, this list of conditions and the following disclaimer. 10185377Ssam * 2. Redistributions in binary form must reproduce the above copyright 11185377Ssam * notice, this list of conditions and the following disclaimer in the 12185377Ssam * documentation and/or other materials provided with the distribution. 13185377Ssam * 14185377Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15185377Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16185377Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17204644Srpaulo * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18185377Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19185377Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20185377Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21185377Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22185377Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23185377Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24185377Ssam * SUCH DAMAGE. 25185377Ssam * 26185377Ssam * $FreeBSD: releng/9.3/lib/libc/amd64/_fpmath.h 175402 2008-01-17 16:39:07Z bde $ 27185377Ssam */ 28185377Ssam 29185377Ssamunion IEEEl2bits { 30185377Ssam long double e; 31185377Ssam struct { 32185377Ssam unsigned int manl :32; 33185377Ssam unsigned int manh :32; 34185377Ssam unsigned int exp :15; 35185377Ssam unsigned int sign :1; 36185377Ssam unsigned int junkl :16; 37185377Ssam unsigned int junkh :32; 38185377Ssam } bits; 39185377Ssam struct { 40185377Ssam unsigned long man :64; 41185377Ssam unsigned int expsign :16; 42185377Ssam unsigned long junk :48; 43185377Ssam } xbits; 44185377Ssam}; 45185377Ssam 46185377Ssam#define LDBL_NBIT 0x80000000 47185377Ssam#define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT) 48185377Ssam 49185377Ssam#define LDBL_MANH_SIZE 32 50185377Ssam#define LDBL_MANL_SIZE 32 51185377Ssam 52185377Ssam#define LDBL_TO_ARRAY32(u, a) do { \ 53185377Ssam (a)[0] = (uint32_t)(u).bits.manl; \ 54185377Ssam (a)[1] = (uint32_t)(u).bits.manh; \ 55185377Ssam} while (0) 56185377Ssam