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_qtox(x) returns (long)*x.
31*7c478bd9Sstevel@tonic-gate */
32*7c478bd9Sstevel@tonic-gate long
_Qp_qtox(const union longdouble * x)33*7c478bd9Sstevel@tonic-gate _Qp_qtox(const union longdouble *x)
34*7c478bd9Sstevel@tonic-gate {
35*7c478bd9Sstevel@tonic-gate long i, round;
36*7c478bd9Sstevel@tonic-gate unsigned int xm, fsr;
37*7c478bd9Sstevel@tonic-gate
38*7c478bd9Sstevel@tonic-gate xm = x->l.msw & 0x7fffffff;
39*7c478bd9Sstevel@tonic-gate
40*7c478bd9Sstevel@tonic-gate __quad_getfsrp(&fsr);
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate /* handle nan, inf, and out-of-range cases */
43*7c478bd9Sstevel@tonic-gate if (xm >= 0x403e0000) {
44*7c478bd9Sstevel@tonic-gate if (x->l.msw == 0xc03e0000 && x->l.frac2 == 0 &&
45*7c478bd9Sstevel@tonic-gate (x->l.frac3 & 0xfffe0000) == 0) {
46*7c478bd9Sstevel@tonic-gate /* return largest negative 64 bit int */
47*7c478bd9Sstevel@tonic-gate i = 0x8000000000000000ul;
48*7c478bd9Sstevel@tonic-gate if ((x->l.frac3 & 0x1ffff) | x->l.frac4) {
49*7c478bd9Sstevel@tonic-gate /* signal inexact */
50*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
51*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, &i);
52*7c478bd9Sstevel@tonic-gate } else {
53*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA |
54*7c478bd9Sstevel@tonic-gate FSR_NXC;
55*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
56*7c478bd9Sstevel@tonic-gate }
57*7c478bd9Sstevel@tonic-gate }
58*7c478bd9Sstevel@tonic-gate return (i);
59*7c478bd9Sstevel@tonic-gate }
60*7c478bd9Sstevel@tonic-gate i = ((x->l.msw & 0x80000000)? 0x8000000000000000ul :
61*7c478bd9Sstevel@tonic-gate 0x7fffffffffffffffl);
62*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NVM) {
63*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, &i);
64*7c478bd9Sstevel@tonic-gate } else {
65*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
66*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
67*7c478bd9Sstevel@tonic-gate }
68*7c478bd9Sstevel@tonic-gate return (i);
69*7c478bd9Sstevel@tonic-gate }
70*7c478bd9Sstevel@tonic-gate if (xm < 0x3fff0000) {
71*7c478bd9Sstevel@tonic-gate i = 0l;
72*7c478bd9Sstevel@tonic-gate if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) {
73*7c478bd9Sstevel@tonic-gate /* signal inexact */
74*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
75*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, &i);
76*7c478bd9Sstevel@tonic-gate } else {
77*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
78*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
79*7c478bd9Sstevel@tonic-gate }
80*7c478bd9Sstevel@tonic-gate }
81*7c478bd9Sstevel@tonic-gate return (i);
82*7c478bd9Sstevel@tonic-gate }
83*7c478bd9Sstevel@tonic-gate
84*7c478bd9Sstevel@tonic-gate /* now x is in the range of 64 bit int */
85*7c478bd9Sstevel@tonic-gate i = 0x4000000000000000l | ((long) (xm & 0xffff) << 46) |
86*7c478bd9Sstevel@tonic-gate ((long) x->l.frac2 << 14) | (x->l.frac3 >> 18);
87*7c478bd9Sstevel@tonic-gate round = i & ((1l << (0x403d - (xm >> 16))) - 1);
88*7c478bd9Sstevel@tonic-gate i >>= (0x403d - (xm >> 16));
89*7c478bd9Sstevel@tonic-gate if (x->l.msw & 0x80000000)
90*7c478bd9Sstevel@tonic-gate i = -i;
91*7c478bd9Sstevel@tonic-gate if (round | (x->l.frac3 & 0x3ffff) | x->l.frac4) {
92*7c478bd9Sstevel@tonic-gate /* signal inexact */
93*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NXM) {
94*7c478bd9Sstevel@tonic-gate __quad_fqtox(x, &i);
95*7c478bd9Sstevel@tonic-gate } else {
96*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
97*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
98*7c478bd9Sstevel@tonic-gate }
99*7c478bd9Sstevel@tonic-gate }
100*7c478bd9Sstevel@tonic-gate return (i);
101*7c478bd9Sstevel@tonic-gate }
102