1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1994-1997, by Sun Microsystems, Inc. 24*7c478bd9Sstevel@tonic-gate * All rights reserved. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #include "quad.h" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate /* 30*7c478bd9Sstevel@tonic-gate * _Q_ulltoq(x) returns (long double)x. 31*7c478bd9Sstevel@tonic-gate */ 32*7c478bd9Sstevel@tonic-gate union longdouble _Q_ulltoq(unsigned long long x)33*7c478bd9Sstevel@tonic-gate_Q_ulltoq(unsigned long long x) 34*7c478bd9Sstevel@tonic-gate { 35*7c478bd9Sstevel@tonic-gate union longdouble z; 36*7c478bd9Sstevel@tonic-gate unsigned int e; 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate /* test for zero */ 39*7c478bd9Sstevel@tonic-gate if (x == 0) { 40*7c478bd9Sstevel@tonic-gate Z.l.msw = Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0; 41*7c478bd9Sstevel@tonic-gate QUAD_RETURN(Z); 42*7c478bd9Sstevel@tonic-gate } 43*7c478bd9Sstevel@tonic-gate 44*7c478bd9Sstevel@tonic-gate /* find the most significant bit */ 45*7c478bd9Sstevel@tonic-gate for (e = 63; (x & (1ll << e)) == 0; e--) 46*7c478bd9Sstevel@tonic-gate ; 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate if (e > 48) { 49*7c478bd9Sstevel@tonic-gate Z.l.msw = (x >> (e - 16)) & 0xffff; 50*7c478bd9Sstevel@tonic-gate Z.l.frac2 = x >> (e - 48); 51*7c478bd9Sstevel@tonic-gate Z.l.frac3 = x << (80 - e); 52*7c478bd9Sstevel@tonic-gate } else if (e > 16) { 53*7c478bd9Sstevel@tonic-gate Z.l.msw = (x >> (e - 16)) & 0xffff; 54*7c478bd9Sstevel@tonic-gate Z.l.frac2 = x << (48 - e); 55*7c478bd9Sstevel@tonic-gate Z.l.frac3 = 0; 56*7c478bd9Sstevel@tonic-gate } else { 57*7c478bd9Sstevel@tonic-gate Z.l.msw = (x << (16 - e)) & 0xffff; 58*7c478bd9Sstevel@tonic-gate Z.l.frac2 = Z.l.frac3 = 0; 59*7c478bd9Sstevel@tonic-gate } 60*7c478bd9Sstevel@tonic-gate Z.l.frac4 = 0; 61*7c478bd9Sstevel@tonic-gate Z.l.msw |= ((e + 0x3fff) << 16); 62*7c478bd9Sstevel@tonic-gate QUAD_RETURN(Z); 63*7c478bd9Sstevel@tonic-gate } 64