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 #ifdef __sparcv9
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate /*
34*0Sstevel@tonic-gate * _Qp_dtoq(pz, x) sets *pz = (long double)x.
35*0Sstevel@tonic-gate */
36*0Sstevel@tonic-gate void
_Qp_dtoq(union longdouble * pz,double x)37*0Sstevel@tonic-gate _Qp_dtoq(union longdouble *pz, double x)
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate #else
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate /*
42*0Sstevel@tonic-gate * _Q_dtoq(x) returns (long double)x.
43*0Sstevel@tonic-gate */
44*0Sstevel@tonic-gate union longdouble
45*0Sstevel@tonic-gate _Q_dtoq(double x)
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate #endif /* __sparcv9 */
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate {
50*0Sstevel@tonic-gate #ifndef __sparcv9
51*0Sstevel@tonic-gate union longdouble z;
52*0Sstevel@tonic-gate #endif
53*0Sstevel@tonic-gate union xdouble u;
54*0Sstevel@tonic-gate unsigned int m, lhi, llo, fsr;
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate /* extract the exponent */
57*0Sstevel@tonic-gate u.d = x;
58*0Sstevel@tonic-gate m = ((u.l.hi & 0x7ff00000) >> 4) + 0x3c000000;
59*0Sstevel@tonic-gate if (m == 0x3c000000) {
60*0Sstevel@tonic-gate /* x is zero or denormal */
61*0Sstevel@tonic-gate if ((u.l.hi & 0xfffff) | u.l.lo) {
62*0Sstevel@tonic-gate /* x is denormal, normalize it */
63*0Sstevel@tonic-gate m = 0x3c010000;
64*0Sstevel@tonic-gate lhi = u.l.hi & 0xfffff;
65*0Sstevel@tonic-gate llo = u.l.lo;
66*0Sstevel@tonic-gate do {
67*0Sstevel@tonic-gate lhi = (lhi << 1) | (llo >> 31);
68*0Sstevel@tonic-gate llo <<= 1;
69*0Sstevel@tonic-gate m -= 0x10000;
70*0Sstevel@tonic-gate } while ((lhi & 0x7ff00000) == 0);
71*0Sstevel@tonic-gate u.l.hi = (u.l.hi & 0x80000000) | lhi;
72*0Sstevel@tonic-gate u.l.lo = llo;
73*0Sstevel@tonic-gate } else {
74*0Sstevel@tonic-gate m = 0;
75*0Sstevel@tonic-gate }
76*0Sstevel@tonic-gate } else if (m == 0x43ff0000) {
77*0Sstevel@tonic-gate /* x is inf or nan */
78*0Sstevel@tonic-gate m = 0x7fff0000;
79*0Sstevel@tonic-gate if (((u.l.hi & 0x7ffff) | u.l.lo) && (u.l.hi & 0x80000) == 0) {
80*0Sstevel@tonic-gate /* snan, signal invalid */
81*0Sstevel@tonic-gate __quad_getfsrp(&fsr);
82*0Sstevel@tonic-gate if (fsr & FSR_NVM) {
83*0Sstevel@tonic-gate __quad_fdtoq(&x, &Z);
84*0Sstevel@tonic-gate QUAD_RETURN(Z);
85*0Sstevel@tonic-gate } else {
86*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
87*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
88*0Sstevel@tonic-gate }
89*0Sstevel@tonic-gate u.l.hi |= 0x80000;
90*0Sstevel@tonic-gate }
91*0Sstevel@tonic-gate }
92*0Sstevel@tonic-gate Z.l.msw = m | (u.l.hi & 0x80000000) | ((u.l.hi & 0xffff0) >> 4);
93*0Sstevel@tonic-gate Z.l.frac2 = (u.l.hi << 28) | (u.l.lo >> 4);
94*0Sstevel@tonic-gate Z.l.frac3 = u.l.lo << 28;
95*0Sstevel@tonic-gate Z.l.frac4 = 0;
96*0Sstevel@tonic-gate QUAD_RETURN(Z);
97*0Sstevel@tonic-gate }
98