1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1994-1997, by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "quad.h"
#ifdef __sparcv9
#define _Q_cmpe _Qp_cmpe
#endif
/*
* _Q_cmpe(x, y) returns the condition code that would result from
* fcmpeq *x, *y (and raises the same exceptions).
*/
enum fcc_type
_Q_cmpe(const union longdouble *x, const union longdouble *y)
{
unsigned int xm, ym, fsr;
if (QUAD_ISNAN(*x) || QUAD_ISNAN(*y)) {
/* nan, signal invalid */
__quad_getfsrp(&fsr);
if (fsr & FSR_NVM) {
__quad_fcmpeq(x, y, &fsr);
return ((fsr >> 10) & 3);
} else {
fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC;
__quad_setfsrp(&fsr);
}
return (fcc_unordered);
}
/* ignore sign of zero */
xm = x->l.msw;
if (QUAD_ISZERO(*x))
xm &= 0x7fffffff;
ym = y->l.msw;
if (QUAD_ISZERO(*y))
ym &= 0x7fffffff;
if ((xm ^ ym) & 0x80000000) /* x and y have opposite signs */
return ((ym & 0x80000000)? fcc_greater : fcc_less);
if (xm & 0x80000000) {
if (xm > ym)
return (fcc_less);
if (xm < ym)
return (fcc_greater);
if (x->l.frac2 > y->l.frac2)
return (fcc_less);
if (x->l.frac2 < y->l.frac2)
return (fcc_greater);
if (x->l.frac3 > y->l.frac3)
return (fcc_less);
if (x->l.frac3 < y->l.frac3)
return (fcc_greater);
if (x->l.frac4 > y->l.frac4)
return (fcc_less);
if (x->l.frac4 < y->l.frac4)
return (fcc_greater);
return (fcc_equal);
}
if (xm < ym)
return (fcc_less);
if (xm > ym)
return (fcc_greater);
if (x->l.frac2 < y->l.frac2)
return (fcc_less);
if (x->l.frac2 > y->l.frac2)
return (fcc_greater);
if (x->l.frac3 < y->l.frac3)
return (fcc_less);
if (x->l.frac3 > y->l.frac3)
return (fcc_greater);
if (x->l.frac4 < y->l.frac4)
return (fcc_less);
if (x->l.frac4 > y->l.frac4)
return (fcc_greater);
return (fcc_equal);
}
|
