2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License, Version 1.0 only
2N/A * (the "License"). You may not use this file except in compliance
2N/A * with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A/*
2N/A * Copyright (c) 1994-1997, by Sun Microsystems, Inc.
2N/A * All rights reserved.
2N/A */
2N/A
2N/A#pragma ident "%Z%%M% %I% %E% SMI"
2N/A
2N/A#include "quad.h"
2N/A
2N/A/*
2N/A * _Q_lltoq(x) returns (long double)x.
2N/A */
2N/Aunion longdouble
2N/A_Q_lltoq(long long x)
2N/A{
2N/A union longdouble z;
2N/A unsigned int s, e;
2N/A
2N/A /* extract the sign */
2N/A s = 0;
2N/A if (x < 0) {
2N/A if ((unsigned long long) x == 0x8000000000000000ull) {
2N/A /* largest negative 64 bit int */
2N/A Z.l.msw = 0xc03e0000;
2N/A Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0;
2N/A QUAD_RETURN(Z);
2N/A }
2N/A x = -x;
2N/A s = 0x80000000;
2N/A } else if (x == 0) {
2N/A Z.l.msw = Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0;
2N/A QUAD_RETURN(Z);
2N/A }
2N/A
2N/A /* find the most significant bit */
2N/A for (e = 62; (x & (1ll << e)) == 0; e--)
2N/A ;
2N/A
2N/A if (e > 48) {
2N/A Z.l.msw = ((unsigned long long) x >> (e - 16)) & 0xffff;
2N/A Z.l.frac2 = (unsigned long long) x >> (e - 48);
2N/A Z.l.frac3 = (unsigned long long) x << (80 - e);
2N/A } else if (e > 16) {
2N/A Z.l.msw = ((unsigned long long) x >> (e - 16)) & 0xffff;
2N/A Z.l.frac2 = (unsigned long long) x << (48 - e);
2N/A Z.l.frac3 = 0;
2N/A } else {
2N/A Z.l.msw = ((unsigned long long) x << (16 - e)) & 0xffff;
2N/A Z.l.frac2 = Z.l.frac3 = 0;
2N/A }
2N/A Z.l.frac4 = 0;
2N/A Z.l.msw |= s | ((e + 0x3fff) << 16);
2N/A QUAD_RETURN(Z);
2N/A}