Branch data Line data Source code
1 : : /*-
2 : : * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
3 : : * All rights reserved.
4 : : *
5 : : * Redistribution and use in source and binary forms, with or without
6 : : * modification, are permitted provided that the following conditions
7 : : * are met:
8 : : * 1. Redistributions of source code must retain the above copyright
9 : : * notice, this list of conditions and the following disclaimer.
10 : : * 2. Redistributions in binary form must reproduce the above copyright
11 : : * notice, this list of conditions and the following disclaimer in the
12 : : * documentation and/or other materials provided with the distribution.
13 : : *
14 : : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 : : * SUCH DAMAGE.
25 : : *
26 : : */
27 : :
28 : : #include <openlibm_math.h>
29 : : #include "math_private.h"
30 : : #include "fpmath.h"
31 : :
32 : : OLM_DLLEXPORT int
33 : 7 : __fpclassifyd(double d)
34 : : {
35 : : union IEEEd2bits u;
36 : :
37 : 7 : u.d = d;
38 [ + + ]: 7 : if (u.bits.exp == 2047) {
39 [ + - + + ]: 3 : if (u.bits.manl == 0 && u.bits.manh == 0) {
40 : 2 : return FP_INFINITE;
41 : : } else {
42 : 1 : return FP_NAN;
43 : : }
44 [ + + ]: 4 : } else if (u.bits.exp != 0) {
45 : 2 : return FP_NORMAL;
46 [ + - + - ]: 2 : } else if (u.bits.manl == 0 && u.bits.manh == 0) {
47 : 2 : return FP_ZERO;
48 : : } else {
49 : 0 : return FP_SUBNORMAL;
50 : : }
51 : : }
52 : :
53 : :
54 : : OLM_DLLEXPORT int
55 : 5 : __fpclassifyf(float f)
56 : : {
57 : : union IEEEf2bits u;
58 : :
59 : 5 : u.f = f;
60 [ + + ]: 5 : if (u.bits.exp == 255) {
61 [ + + ]: 3 : if (u.bits.man == 0) {
62 : 2 : return FP_INFINITE;
63 : : } else {
64 : 1 : return FP_NAN;
65 : : }
66 [ - + ]: 2 : } else if (u.bits.exp != 0) {
67 : 0 : return FP_NORMAL;
68 [ + - ]: 2 : } else if (u.bits.man == 0) {
69 : 2 : return FP_ZERO;
70 : : } else {
71 : 0 : return FP_SUBNORMAL;
72 : : }
73 : : }
74 : :
75 : : #ifdef OLM_LONG_DOUBLE
76 : : OLM_DLLEXPORT int
77 : 0 : __fpclassifyl(long double e)
78 : : {
79 : : union IEEEl2bits u;
80 : :
81 : 0 : u.e = e;
82 : 0 : mask_nbit_l(u);
83 [ # # ]: 0 : if (u.bits.exp == 32767) {
84 [ # # # # ]: 0 : if (u.bits.manl == 0 && u.bits.manh == 0) {
85 : 0 : return FP_INFINITE;
86 : : } else {
87 : 0 : return FP_NAN;
88 : : }
89 [ # # ]: 0 : } else if (u.bits.exp != 0) {
90 : 0 : return FP_NORMAL;
91 [ # # # # ]: 0 : } else if (u.bits.manl == 0 && u.bits.manh == 0) {
92 : 0 : return FP_ZERO;
93 : : } else {
94 : 0 : return FP_SUBNORMAL;
95 : : }
96 : : }
97 : : #endif
98 : :
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