1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 1994-1997, by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include "quad.h"
30*0Sstevel@tonic-gate
31*0Sstevel@tonic-gate /*
32*0Sstevel@tonic-gate * _Qp_xtoq(pz, x) sets *pz = (long double)x.
33*0Sstevel@tonic-gate */
34*0Sstevel@tonic-gate void
_Qp_xtoq(union longdouble * pz,long x)35*0Sstevel@tonic-gate _Qp_xtoq(union longdouble *pz, long x)
36*0Sstevel@tonic-gate {
37*0Sstevel@tonic-gate unsigned int s, e;
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate /* extract the sign */
40*0Sstevel@tonic-gate s = 0;
41*0Sstevel@tonic-gate if (x < 0) {
42*0Sstevel@tonic-gate if ((unsigned long) x == 0x8000000000000000ul) {
43*0Sstevel@tonic-gate /* largest negative 64 bit int */
44*0Sstevel@tonic-gate Z.l.msw = 0xc03e0000;
45*0Sstevel@tonic-gate Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0;
46*0Sstevel@tonic-gate QUAD_RETURN(Z);
47*0Sstevel@tonic-gate }
48*0Sstevel@tonic-gate x = -x;
49*0Sstevel@tonic-gate s = 0x80000000;
50*0Sstevel@tonic-gate } else if (x == 0) {
51*0Sstevel@tonic-gate Z.l.msw = Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0;
52*0Sstevel@tonic-gate QUAD_RETURN(Z);
53*0Sstevel@tonic-gate }
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate /* find the most significant bit */
56*0Sstevel@tonic-gate for (e = 62; (x & (1l << e)) == 0; e--)
57*0Sstevel@tonic-gate ;
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate if (e > 48) {
60*0Sstevel@tonic-gate Z.l.msw = ((unsigned long) x >> (e - 16)) & 0xffff;
61*0Sstevel@tonic-gate Z.l.frac2 = (unsigned long) x >> (e - 48);
62*0Sstevel@tonic-gate Z.l.frac3 = (unsigned long) x << (80 - e);
63*0Sstevel@tonic-gate } else if (e > 16) {
64*0Sstevel@tonic-gate Z.l.msw = ((unsigned long) x >> (e - 16)) & 0xffff;
65*0Sstevel@tonic-gate Z.l.frac2 = (unsigned long) x << (48 - e);
66*0Sstevel@tonic-gate Z.l.frac3 = 0;
67*0Sstevel@tonic-gate } else {
68*0Sstevel@tonic-gate Z.l.msw = ((unsigned long) x << (16 - e)) & 0xffff;
69*0Sstevel@tonic-gate Z.l.frac2 = Z.l.frac3 = 0;
70*0Sstevel@tonic-gate }
71*0Sstevel@tonic-gate Z.l.frac4 = 0;
72*0Sstevel@tonic-gate Z.l.msw |= s | ((e + 0x3fff) << 16);
73*0Sstevel@tonic-gate QUAD_RETURN(Z);
74*0Sstevel@tonic-gate }
75