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) 1986 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate */
25*0Sstevel@tonic-gate #ident "%Z%%M% %I% %E% SMI" /* SunOS-4.1 1.7 88/12/06 */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #include <sys/fpu/fpu_simulator.h>
28*0Sstevel@tonic-gate #include <sys/fpu/globals.h>
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate enum fcc_type
_fp_compare(pfpsd,px,py,strict)31*0Sstevel@tonic-gate _fp_compare(pfpsd, px, py, strict)
32*0Sstevel@tonic-gate fp_simd_type *pfpsd; /* simulator data */
33*0Sstevel@tonic-gate unpacked *px, *py;
34*0Sstevel@tonic-gate int strict;
35*0Sstevel@tonic-gate /*
36*0Sstevel@tonic-gate * 0 if quiet NaN unexceptional, 1 if
37*0Sstevel@tonic-gate * exceptional
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate {
40*0Sstevel@tonic-gate enum fcc_type cc;
41*0Sstevel@tonic-gate int n;
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate if ((px->fpclass == fp_quiet) || (py->fpclass == fp_quiet) ||
44*0Sstevel@tonic-gate (px->fpclass == fp_signaling) || (py->fpclass == fp_signaling)) {
45*0Sstevel@tonic-gate if (strict) /* NaN */
46*0Sstevel@tonic-gate fpu_set_exception(pfpsd, fp_invalid);
47*0Sstevel@tonic-gate cc = fcc_unordered;
48*0Sstevel@tonic-gate } else if ((px->fpclass == fp_zero) && (py->fpclass == fp_zero))
49*0Sstevel@tonic-gate cc = fcc_equal;
50*0Sstevel@tonic-gate /* both zeros */
51*0Sstevel@tonic-gate else if (px->sign < py->sign)
52*0Sstevel@tonic-gate cc = fcc_greater;
53*0Sstevel@tonic-gate else if (px->sign > py->sign)
54*0Sstevel@tonic-gate cc = fcc_less;
55*0Sstevel@tonic-gate else { /* signs the same, compute magnitude cc */
56*0Sstevel@tonic-gate if ((int) px->fpclass > (int) py->fpclass)
57*0Sstevel@tonic-gate cc = fcc_greater;
58*0Sstevel@tonic-gate else if ((int) px->fpclass < (int) py->fpclass)
59*0Sstevel@tonic-gate cc = fcc_less;
60*0Sstevel@tonic-gate else
61*0Sstevel@tonic-gate /* same classes */ if (px->fpclass == fp_infinity)
62*0Sstevel@tonic-gate cc = fcc_equal; /* same infinity */
63*0Sstevel@tonic-gate else if (px->exponent > py->exponent)
64*0Sstevel@tonic-gate cc = fcc_greater;
65*0Sstevel@tonic-gate else if (px->exponent < py->exponent)
66*0Sstevel@tonic-gate cc = fcc_less;
67*0Sstevel@tonic-gate else { /* equal exponents */
68*0Sstevel@tonic-gate n = fpu_cmpli(px->significand, py->significand, 4);
69*0Sstevel@tonic-gate if (n > 0) cc = fcc_greater;
70*0Sstevel@tonic-gate else if (n < 0) cc = fcc_less;
71*0Sstevel@tonic-gate else cc = fcc_equal;
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate if (px->sign)
74*0Sstevel@tonic-gate switch (cc) { /* negative numbers */
75*0Sstevel@tonic-gate case fcc_less:
76*0Sstevel@tonic-gate cc = fcc_greater;
77*0Sstevel@tonic-gate break;
78*0Sstevel@tonic-gate case fcc_greater:
79*0Sstevel@tonic-gate cc = fcc_less;
80*0Sstevel@tonic-gate break;
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate }
83*0Sstevel@tonic-gate return (cc);
84*0Sstevel@tonic-gate }
85