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 * _Qp_qtoux(x) returns (unsigned long)*x.
31*7c478bd9Sstevel@tonic-gate */
32*7c478bd9Sstevel@tonic-gate unsigned long
_Qp_qtoux(const union longdouble * x)33*7c478bd9Sstevel@tonic-gate _Qp_qtoux(const union longdouble *x)
34*7c478bd9Sstevel@tonic-gate {
35*7c478bd9Sstevel@tonic-gate union longdouble z;
36*7c478bd9Sstevel@tonic-gate unsigned long i, round;
37*7c478bd9Sstevel@tonic-gate unsigned int xm, fsr;
38*7c478bd9Sstevel@tonic-gate
39*7c478bd9Sstevel@tonic-gate xm = x->l.msw & 0x7fffffff;
40*7c478bd9Sstevel@tonic-gate
41*7c478bd9Sstevel@tonic-gate __quad_getfsrp(&fsr);
42*7c478bd9Sstevel@tonic-gate
43*7c478bd9Sstevel@tonic-gate /* handle nan, inf, and out-of-range cases */
44*7c478bd9Sstevel@tonic-gate if (xm >= 0x403e0000) {
45*7c478bd9Sstevel@tonic-gate if (x->l.msw < 0x403f0000) {
46*7c478bd9Sstevel@tonic-gate i = 0x8000000000000000ul |
47*7c478bd9Sstevel@tonic-gate ((long) (xm & 0xffff) << 47) |
48*7c478bd9Sstevel@tonic-gate ((long) x->l.frac2 << 15) | (x->l.frac3 >> 17);
49*7c478bd9Sstevel@tonic-gate if ((x->l.frac3 & 0x1ffff) | x->l.frac4) {
50*7c478bd9Sstevel@tonic-gate /* signal inexact */
51*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
52*7c478bd9Sstevel@tonic-gate /* z = x - 2^63 */
53*7c478bd9Sstevel@tonic-gate if (xm & 0xffff ||
54*7c478bd9Sstevel@tonic-gate x->l.frac2 & 0xffff0000) {
55*7c478bd9Sstevel@tonic-gate z.l.msw = xm & 0xffff;
56*7c478bd9Sstevel@tonic-gate z.l.frac2 = x->l.frac2;
57*7c478bd9Sstevel@tonic-gate z.l.frac3 = x->l.frac3;
58*7c478bd9Sstevel@tonic-gate z.l.frac4 = x->l.frac4;
59*7c478bd9Sstevel@tonic-gate } else if (x->l.frac2 & 0xffff ||
60*7c478bd9Sstevel@tonic-gate x->l.frac3 & 0xffff0000) {
61*7c478bd9Sstevel@tonic-gate z.l.msw = x->l.frac2;
62*7c478bd9Sstevel@tonic-gate z.l.frac2 = x->l.frac3;
63*7c478bd9Sstevel@tonic-gate z.l.frac3 = x->l.frac4;
64*7c478bd9Sstevel@tonic-gate z.l.frac4 = 0;
65*7c478bd9Sstevel@tonic-gate } else if (x->l.frac3 & 0xffff ||
66*7c478bd9Sstevel@tonic-gate x->l.frac4 & 0xffff0000) {
67*7c478bd9Sstevel@tonic-gate z.l.msw = x->l.frac3;
68*7c478bd9Sstevel@tonic-gate z.l.frac2 = x->l.frac4;
69*7c478bd9Sstevel@tonic-gate z.l.frac3 = z.l.frac4 = 0;
70*7c478bd9Sstevel@tonic-gate } else {
71*7c478bd9Sstevel@tonic-gate z.l.msw = x->l.frac4;
72*7c478bd9Sstevel@tonic-gate z.l.frac2 = z.l.frac3 =
73*7c478bd9Sstevel@tonic-gate z.l.frac4 = 0;
74*7c478bd9Sstevel@tonic-gate }
75*7c478bd9Sstevel@tonic-gate xm = 0x403e;
76*7c478bd9Sstevel@tonic-gate while ((z.l.msw & 0x10000) == 0) {
77*7c478bd9Sstevel@tonic-gate z.l.msw = (z.l.msw << 1) |
78*7c478bd9Sstevel@tonic-gate (z.l.frac2 >> 31);
79*7c478bd9Sstevel@tonic-gate z.l.frac2 = (z.l.frac2 << 1) |
80*7c478bd9Sstevel@tonic-gate (z.l.frac3 >> 31);
81*7c478bd9Sstevel@tonic-gate z.l.frac3 = (z.l.frac3 << 1) |
82*7c478bd9Sstevel@tonic-gate (z.l.frac4 >> 31);
83*7c478bd9Sstevel@tonic-gate z.l.frac4 <<= 1;
84*7c478bd9Sstevel@tonic-gate xm--;
85*7c478bd9Sstevel@tonic-gate }
86*7c478bd9Sstevel@tonic-gate z.l.msw |= (xm << 16);
87*7c478bd9Sstevel@tonic-gate __quad_fqtox(&z, (long *)&i);
88*7c478bd9Sstevel@tonic-gate i |= 0x8000000000000000ul;
89*7c478bd9Sstevel@tonic-gate } else {
90*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA |
91*7c478bd9Sstevel@tonic-gate FSR_NXC;
92*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
93*7c478bd9Sstevel@tonic-gate }
94*7c478bd9Sstevel@tonic-gate }
95*7c478bd9Sstevel@tonic-gate return (i);
96*7c478bd9Sstevel@tonic-gate }
97*7c478bd9Sstevel@tonic-gate if (x->l.msw == 0xc03e0000 && x->l.frac2 == 0 &&
98*7c478bd9Sstevel@tonic-gate (x->l.frac3 & 0xfffe0000) == 0) {
99*7c478bd9Sstevel@tonic-gate /* return largest negative 64 bit int */
100*7c478bd9Sstevel@tonic-gate i = 0x8000000000000000ul;
101*7c478bd9Sstevel@tonic-gate if ((x->l.frac3 & 0x1ffff) | x->l.frac4) {
102*7c478bd9Sstevel@tonic-gate /* signal inexact */
103*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
104*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, (long *)&i);
105*7c478bd9Sstevel@tonic-gate } else {
106*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA |
107*7c478bd9Sstevel@tonic-gate FSR_NXC;
108*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
109*7c478bd9Sstevel@tonic-gate }
110*7c478bd9Sstevel@tonic-gate }
111*7c478bd9Sstevel@tonic-gate return (i);
112*7c478bd9Sstevel@tonic-gate }
113*7c478bd9Sstevel@tonic-gate i = 0x7fffffffffffffffl;
114*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NVM) {
115*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, (long *)&i);
116*7c478bd9Sstevel@tonic-gate } else {
117*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
118*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
119*7c478bd9Sstevel@tonic-gate }
120*7c478bd9Sstevel@tonic-gate return (i);
121*7c478bd9Sstevel@tonic-gate }
122*7c478bd9Sstevel@tonic-gate if (xm < 0x3fff0000) {
123*7c478bd9Sstevel@tonic-gate i = 0l;
124*7c478bd9Sstevel@tonic-gate if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) {
125*7c478bd9Sstevel@tonic-gate /* signal inexact */
126*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
127*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, (long *)&i);
128*7c478bd9Sstevel@tonic-gate } else {
129*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
130*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
131*7c478bd9Sstevel@tonic-gate }
132*7c478bd9Sstevel@tonic-gate }
133*7c478bd9Sstevel@tonic-gate return (i);
134*7c478bd9Sstevel@tonic-gate }
135*7c478bd9Sstevel@tonic-gate
136*7c478bd9Sstevel@tonic-gate /* now x is in the range of long */
137*7c478bd9Sstevel@tonic-gate i = 0x4000000000000000l | ((long) (xm & 0xffff) << 46) |
138*7c478bd9Sstevel@tonic-gate ((long) x->l.frac2 << 14) | (x->l.frac3 >> 18);
139*7c478bd9Sstevel@tonic-gate round = i & ((1l << (0x403d - (xm >> 16))) - 1);
140*7c478bd9Sstevel@tonic-gate i >>= (0x403d - (xm >> 16));
141*7c478bd9Sstevel@tonic-gate if (x->l.msw & 0x80000000)
142*7c478bd9Sstevel@tonic-gate i = -i;
143*7c478bd9Sstevel@tonic-gate if (round | (x->l.frac3 & 0x3ffff) | x->l.frac4) {
144*7c478bd9Sstevel@tonic-gate /* signal inexact */
145*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
146*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, (long *)&i);
147*7c478bd9Sstevel@tonic-gate } else {
148*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
149*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
150*7c478bd9Sstevel@tonic-gate }
151*7c478bd9Sstevel@tonic-gate }
152*7c478bd9Sstevel@tonic-gate return (i);
153*7c478bd9Sstevel@tonic-gate }
154