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_qtox(x) returns (long)*x.
33*0Sstevel@tonic-gate */
34*0Sstevel@tonic-gate long
_Qp_qtox(const union longdouble * x)35*0Sstevel@tonic-gate _Qp_qtox(const union longdouble *x)
36*0Sstevel@tonic-gate {
37*0Sstevel@tonic-gate long i, round;
38*0Sstevel@tonic-gate unsigned int xm, fsr;
39*0Sstevel@tonic-gate
40*0Sstevel@tonic-gate xm = x->l.msw & 0x7fffffff;
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate __quad_getfsrp(&fsr);
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate /* handle nan, inf, and out-of-range cases */
45*0Sstevel@tonic-gate if (xm >= 0x403e0000) {
46*0Sstevel@tonic-gate if (x->l.msw == 0xc03e0000 && x->l.frac2 == 0 &&
47*0Sstevel@tonic-gate (x->l.frac3 & 0xfffe0000) == 0) {
48*0Sstevel@tonic-gate /* return largest negative 64 bit int */
49*0Sstevel@tonic-gate i = 0x8000000000000000ul;
50*0Sstevel@tonic-gate if ((x->l.frac3 & 0x1ffff) | x->l.frac4) {
51*0Sstevel@tonic-gate /* signal inexact */
52*0Sstevel@tonic-gate if (fsr & FSR_NXM) {
53*0Sstevel@tonic-gate __quad_fqtox(x, &i);
54*0Sstevel@tonic-gate } else {
55*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA |
56*0Sstevel@tonic-gate FSR_NXC;
57*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
58*0Sstevel@tonic-gate }
59*0Sstevel@tonic-gate }
60*0Sstevel@tonic-gate return (i);
61*0Sstevel@tonic-gate }
62*0Sstevel@tonic-gate i = ((x->l.msw & 0x80000000)? 0x8000000000000000ul :
63*0Sstevel@tonic-gate 0x7fffffffffffffffl);
64*0Sstevel@tonic-gate if (fsr & FSR_NVM) {
65*0Sstevel@tonic-gate __quad_fqtox(x, &i);
66*0Sstevel@tonic-gate } else {
67*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
68*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate return (i);
71*0Sstevel@tonic-gate }
72*0Sstevel@tonic-gate if (xm < 0x3fff0000) {
73*0Sstevel@tonic-gate i = 0l;
74*0Sstevel@tonic-gate if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) {
75*0Sstevel@tonic-gate /* signal inexact */
76*0Sstevel@tonic-gate if (fsr & FSR_NXM) {
77*0Sstevel@tonic-gate __quad_fqtox(x, &i);
78*0Sstevel@tonic-gate } else {
79*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
80*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate }
83*0Sstevel@tonic-gate return (i);
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate
86*0Sstevel@tonic-gate /* now x is in the range of 64 bit int */
87*0Sstevel@tonic-gate i = 0x4000000000000000l | ((long) (xm & 0xffff) << 46) |
88*0Sstevel@tonic-gate ((long) x->l.frac2 << 14) | (x->l.frac3 >> 18);
89*0Sstevel@tonic-gate round = i & ((1l << (0x403d - (xm >> 16))) - 1);
90*0Sstevel@tonic-gate i >>= (0x403d - (xm >> 16));
91*0Sstevel@tonic-gate if (x->l.msw & 0x80000000)
92*0Sstevel@tonic-gate i = -i;
93*0Sstevel@tonic-gate if (round | (x->l.frac3 & 0x3ffff) | x->l.frac4) {
94*0Sstevel@tonic-gate /* signal inexact */
95*0Sstevel@tonic-gate if (fsr & FSR_NXM) {
96*0Sstevel@tonic-gate __quad_fqtox(x, &i);
97*0Sstevel@tonic-gate } else {
98*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC;
99*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate }
102*0Sstevel@tonic-gate return (i);
103*0Sstevel@tonic-gate }
104