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 #ifdef __sparcv9
30*7c478bd9Sstevel@tonic-gate #define _Q_cmp _Qp_cmp
31*7c478bd9Sstevel@tonic-gate #endif
32*7c478bd9Sstevel@tonic-gate
33*7c478bd9Sstevel@tonic-gate /*
34*7c478bd9Sstevel@tonic-gate * _Q_cmp(x, y) returns the condition code that would result from
35*7c478bd9Sstevel@tonic-gate * fcmpq *x, *y (and raises the same exceptions).
36*7c478bd9Sstevel@tonic-gate */
37*7c478bd9Sstevel@tonic-gate enum fcc_type
_Q_cmp(const union longdouble * x,const union longdouble * y)38*7c478bd9Sstevel@tonic-gate _Q_cmp(const union longdouble *x, const union longdouble *y)
39*7c478bd9Sstevel@tonic-gate {
40*7c478bd9Sstevel@tonic-gate unsigned int xm, ym, fsr;
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate if (QUAD_ISNAN(*x) || QUAD_ISNAN(*y)) {
43*7c478bd9Sstevel@tonic-gate if ((QUAD_ISNAN(*x) && !(x->l.msw & 0x8000)) ||
44*7c478bd9Sstevel@tonic-gate (QUAD_ISNAN(*y) && !(y->l.msw & 0x8000))) {
45*7c478bd9Sstevel@tonic-gate /* snan, signal invalid */
46*7c478bd9Sstevel@tonic-gate __quad_getfsrp(&fsr);
47*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NVM) {
48*7c478bd9Sstevel@tonic-gate __quad_fcmpq(x, y, &fsr);
49*7c478bd9Sstevel@tonic-gate return ((fsr >> 10) & 3);
50*7c478bd9Sstevel@tonic-gate } else {
51*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
52*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr);
53*7c478bd9Sstevel@tonic-gate }
54*7c478bd9Sstevel@tonic-gate }
55*7c478bd9Sstevel@tonic-gate return (fcc_unordered);
56*7c478bd9Sstevel@tonic-gate }
57*7c478bd9Sstevel@tonic-gate
58*7c478bd9Sstevel@tonic-gate /* ignore sign of zero */
59*7c478bd9Sstevel@tonic-gate xm = x->l.msw;
60*7c478bd9Sstevel@tonic-gate if (QUAD_ISZERO(*x))
61*7c478bd9Sstevel@tonic-gate xm &= 0x7fffffff;
62*7c478bd9Sstevel@tonic-gate ym = y->l.msw;
63*7c478bd9Sstevel@tonic-gate if (QUAD_ISZERO(*y))
64*7c478bd9Sstevel@tonic-gate ym &= 0x7fffffff;
65*7c478bd9Sstevel@tonic-gate
66*7c478bd9Sstevel@tonic-gate if ((xm ^ ym) & 0x80000000) /* x and y have opposite signs */
67*7c478bd9Sstevel@tonic-gate return ((ym & 0x80000000)? fcc_greater : fcc_less);
68*7c478bd9Sstevel@tonic-gate
69*7c478bd9Sstevel@tonic-gate if (xm & 0x80000000) {
70*7c478bd9Sstevel@tonic-gate if (xm > ym)
71*7c478bd9Sstevel@tonic-gate return (fcc_less);
72*7c478bd9Sstevel@tonic-gate if (xm < ym)
73*7c478bd9Sstevel@tonic-gate return (fcc_greater);
74*7c478bd9Sstevel@tonic-gate if (x->l.frac2 > y->l.frac2)
75*7c478bd9Sstevel@tonic-gate return (fcc_less);
76*7c478bd9Sstevel@tonic-gate if (x->l.frac2 < y->l.frac2)
77*7c478bd9Sstevel@tonic-gate return (fcc_greater);
78*7c478bd9Sstevel@tonic-gate if (x->l.frac3 > y->l.frac3)
79*7c478bd9Sstevel@tonic-gate return (fcc_less);
80*7c478bd9Sstevel@tonic-gate if (x->l.frac3 < y->l.frac3)
81*7c478bd9Sstevel@tonic-gate return (fcc_greater);
82*7c478bd9Sstevel@tonic-gate if (x->l.frac4 > y->l.frac4)
83*7c478bd9Sstevel@tonic-gate return (fcc_less);
84*7c478bd9Sstevel@tonic-gate if (x->l.frac4 < y->l.frac4)
85*7c478bd9Sstevel@tonic-gate return (fcc_greater);
86*7c478bd9Sstevel@tonic-gate return (fcc_equal);
87*7c478bd9Sstevel@tonic-gate }
88*7c478bd9Sstevel@tonic-gate if (xm < ym)
89*7c478bd9Sstevel@tonic-gate return (fcc_less);
90*7c478bd9Sstevel@tonic-gate if (xm > ym)
91*7c478bd9Sstevel@tonic-gate return (fcc_greater);
92*7c478bd9Sstevel@tonic-gate if (x->l.frac2 < y->l.frac2)
93*7c478bd9Sstevel@tonic-gate return (fcc_less);
94*7c478bd9Sstevel@tonic-gate if (x->l.frac2 > y->l.frac2)
95*7c478bd9Sstevel@tonic-gate return (fcc_greater);
96*7c478bd9Sstevel@tonic-gate if (x->l.frac3 < y->l.frac3)
97*7c478bd9Sstevel@tonic-gate return (fcc_less);
98*7c478bd9Sstevel@tonic-gate if (x->l.frac3 > y->l.frac3)
99*7c478bd9Sstevel@tonic-gate return (fcc_greater);
100*7c478bd9Sstevel@tonic-gate if (x->l.frac4 < y->l.frac4)
101*7c478bd9Sstevel@tonic-gate return (fcc_less);
102*7c478bd9Sstevel@tonic-gate if (x->l.frac4 > y->l.frac4)
103*7c478bd9Sstevel@tonic-gate return (fcc_greater);
104*7c478bd9Sstevel@tonic-gate return (fcc_equal);
105*7c478bd9Sstevel@tonic-gate }
106