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comparison druntime/src/compiler/dmd/typeinfo/ti_float.d @ 1458:e0b2d67cfe7c

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Added druntime (this should be removed once it works).
author Robert Clipsham <robert@octarineparrot.com>
date Tue, 02 Jun 2009 17:43:06 +0100
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1456:7b218ec1044f 1458:e0b2d67cfe7c
1 /**
2 * TypeInfo support code.
3 *
4 * Copyright: Copyright Digital Mars 2004 - 2009.
5 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
6 * Authors: Walter Bright
7 *
8 * Copyright Digital Mars 2004 - 2009.
9 * Distributed under the Boost Software License, Version 1.0.
10 * (See accompanying file LICENSE_1_0.txt or copy at
11 * http://www.boost.org/LICENSE_1_0.txt)
12 */
13 module rt.typeinfo.ti_float;
14
15 // float
16
17 class TypeInfo_f : TypeInfo
18 {
19 override string toString() { return "float"; }
20
21 override hash_t getHash(in void* p)
22 {
23 return *cast(uint *)p;
24 }
25
26 static equals_t _equals(float f1, float f2)
27 {
28 return f1 == f2 ||
29 (f1 !<>= f1 && f2 !<>= f2);
30 }
31
32 static int _compare(float d1, float d2)
33 {
34 if (d1 !<>= d2) // if either are NaN
35 {
36 if (d1 !<>= d1)
37 { if (d2 !<>= d2)
38 return 0;
39 return -1;
40 }
41 return 1;
42 }
43 return (d1 == d2) ? 0 : ((d1 < d2) ? -1 : 1);
44 }
45
46 override equals_t equals(in void* p1, in void* p2)
47 {
48 return _equals(*cast(float *)p1, *cast(float *)p2);
49 }
50
51 override int compare(in void* p1, in void* p2)
52 {
53 return _compare(*cast(float *)p1, *cast(float *)p2);
54 }
55
56 override size_t tsize()
57 {
58 return float.sizeof;
59 }
60
61 override void swap(void *p1, void *p2)
62 {
63 float t;
64
65 t = *cast(float *)p1;
66 *cast(float *)p1 = *cast(float *)p2;
67 *cast(float *)p2 = t;
68 }
69
70 override void[] init()
71 { static immutable float r;
72
73 return (cast(float *)&r)[0 .. 1];
74 }
75 }