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 #define _Q_cmp _Qp_cmp
33*0Sstevel@tonic-gate #endif
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate /*
36*0Sstevel@tonic-gate * _Q_cmp(x, y) returns the condition code that would result from
37*0Sstevel@tonic-gate * fcmpq *x, *y (and raises the same exceptions).
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate enum fcc_type
_Q_cmp(const union longdouble * x,const union longdouble * y)40*0Sstevel@tonic-gate _Q_cmp(const union longdouble *x, const union longdouble *y)
41*0Sstevel@tonic-gate {
42*0Sstevel@tonic-gate unsigned int xm, ym, fsr;
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate if (QUAD_ISNAN(*x) || QUAD_ISNAN(*y)) {
45*0Sstevel@tonic-gate if ((QUAD_ISNAN(*x) && !(x->l.msw & 0x8000)) ||
46*0Sstevel@tonic-gate (QUAD_ISNAN(*y) && !(y->l.msw & 0x8000))) {
47*0Sstevel@tonic-gate /* snan, signal invalid */
48*0Sstevel@tonic-gate __quad_getfsrp(&fsr);
49*0Sstevel@tonic-gate if (fsr & FSR_NVM) {
50*0Sstevel@tonic-gate __quad_fcmpq(x, y, &fsr);
51*0Sstevel@tonic-gate return ((fsr >> 10) & 3);
52*0Sstevel@tonic-gate } else {
53*0Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
54*0Sstevel@tonic-gate __quad_setfsrp(&fsr);
55*0Sstevel@tonic-gate }
56*0Sstevel@tonic-gate }
57*0Sstevel@tonic-gate return (fcc_unordered);
58*0Sstevel@tonic-gate }
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate /* ignore sign of zero */
61*0Sstevel@tonic-gate xm = x->l.msw;
62*0Sstevel@tonic-gate if (QUAD_ISZERO(*x))
63*0Sstevel@tonic-gate xm &= 0x7fffffff;
64*0Sstevel@tonic-gate ym = y->l.msw;
65*0Sstevel@tonic-gate if (QUAD_ISZERO(*y))
66*0Sstevel@tonic-gate ym &= 0x7fffffff;
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate if ((xm ^ ym) & 0x80000000) /* x and y have opposite signs */
69*0Sstevel@tonic-gate return ((ym & 0x80000000)? fcc_greater : fcc_less);
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate if (xm & 0x80000000) {
72*0Sstevel@tonic-gate if (xm > ym)
73*0Sstevel@tonic-gate return (fcc_less);
74*0Sstevel@tonic-gate if (xm < ym)
75*0Sstevel@tonic-gate return (fcc_greater);
76*0Sstevel@tonic-gate if (x->l.frac2 > y->l.frac2)
77*0Sstevel@tonic-gate return (fcc_less);
78*0Sstevel@tonic-gate if (x->l.frac2 < y->l.frac2)
79*0Sstevel@tonic-gate return (fcc_greater);
80*0Sstevel@tonic-gate if (x->l.frac3 > y->l.frac3)
81*0Sstevel@tonic-gate return (fcc_less);
82*0Sstevel@tonic-gate if (x->l.frac3 < y->l.frac3)
83*0Sstevel@tonic-gate return (fcc_greater);
84*0Sstevel@tonic-gate if (x->l.frac4 > y->l.frac4)
85*0Sstevel@tonic-gate return (fcc_less);
86*0Sstevel@tonic-gate if (x->l.frac4 < y->l.frac4)
87*0Sstevel@tonic-gate return (fcc_greater);
88*0Sstevel@tonic-gate return (fcc_equal);
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate if (xm < ym)
91*0Sstevel@tonic-gate return (fcc_less);
92*0Sstevel@tonic-gate if (xm > ym)
93*0Sstevel@tonic-gate return (fcc_greater);
94*0Sstevel@tonic-gate if (x->l.frac2 < y->l.frac2)
95*0Sstevel@tonic-gate return (fcc_less);
96*0Sstevel@tonic-gate if (x->l.frac2 > y->l.frac2)
97*0Sstevel@tonic-gate return (fcc_greater);
98*0Sstevel@tonic-gate if (x->l.frac3 < y->l.frac3)
99*0Sstevel@tonic-gate return (fcc_less);
100*0Sstevel@tonic-gate if (x->l.frac3 > y->l.frac3)
101*0Sstevel@tonic-gate return (fcc_greater);
102*0Sstevel@tonic-gate if (x->l.frac4 < y->l.frac4)
103*0Sstevel@tonic-gate return (fcc_less);
104*0Sstevel@tonic-gate if (x->l.frac4 > y->l.frac4)
105*0Sstevel@tonic-gate return (fcc_greater);
106*0Sstevel@tonic-gate return (fcc_equal);
107*0Sstevel@tonic-gate }
108