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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Josef Cejka |
2 | * Copyright (C) 2005 Josef Cejka |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include<softfloat.h> |
29 | #include<softfloat.h> |
30 | #include<sftypes.h> |
30 | #include<sftypes.h> |
31 | #include<arithmetic.h> |
31 | #include<arithmetic.h> |
32 | #include<conversion.h> |
32 | #include<conversion.h> |
33 | #include<comparison.h> |
33 | #include<comparison.h> |
34 | #include<other.h> |
34 | #include<other.h> |
35 | 35 | ||
36 | /* Arithmetic functions */ |
36 | /* Arithmetic functions */ |
37 | 37 | ||
38 | float __addsf3(float a, float b) |
38 | float __addsf3(float a, float b) |
39 | { |
39 | { |
40 | float32 fa, fb; |
40 | float32 fa, fb; |
41 | fa.f=a; |
41 | fa.f=a; |
42 | fb.f=b; |
42 | fb.f=b; |
43 | if (fa.parts.sign!=fb.parts.sign) { |
43 | if (fa.parts.sign!=fb.parts.sign) { |
44 | if (fa.parts.sign) { |
44 | if (fa.parts.sign) { |
45 | fa.parts.sign=0; |
45 | fa.parts.sign=0; |
46 | return subFloat32(fb,fa).f; |
46 | return subFloat32(fb,fa).f; |
47 | }; |
47 | }; |
48 | fb.parts.sign=0; |
48 | fb.parts.sign=0; |
49 | return subFloat32(fa,fb).f; |
49 | return subFloat32(fa,fb).f; |
50 | } |
50 | } |
51 | return addFloat32(fa,fb).f; |
51 | return addFloat32(fa,fb).f; |
52 | }; |
52 | }; |
53 | 53 | ||
54 | float __subsf3(float a, float b) |
54 | float __subsf3(float a, float b) |
55 | { |
55 | { |
56 | float32 fa, fb; |
56 | float32 fa, fb; |
57 | fa.f=a; |
57 | fa.f=a; |
58 | fb.f=b; |
58 | fb.f=b; |
59 | if (fa.parts.sign!=fb.parts.sign) { |
59 | if (fa.parts.sign!=fb.parts.sign) { |
60 | fb.parts.sign!=fb.parts.sign; |
60 | fb.parts.sign!=fb.parts.sign; |
61 | return addFloat32(fa,fb).f; |
61 | return addFloat32(fa,fb).f; |
62 | } |
62 | } |
63 | return subFloat32(fa,fb).f; |
63 | return subFloat32(fa,fb).f; |
64 | }; |
64 | }; |
65 | 65 | ||
66 | float __negsf2(float a) |
66 | float __negsf2(float a) |
67 | { |
67 | { |
68 | float32 fa; |
68 | float32 fa; |
69 | fa.f=a; |
69 | fa.f=a; |
70 | fa.parts.sign=!fa.parts.sign; |
70 | fa.parts.sign=!fa.parts.sign; |
71 | return fa.f; |
71 | return fa.f; |
72 | }; |
72 | }; |
73 | 73 | ||
74 | double __negdf2(double a) |
74 | double __negdf2(double a) |
75 | { |
75 | { |
76 | float64 fa; |
76 | float64 fa; |
77 | fa.d=a; |
77 | fa.d=a; |
78 | fa.parts.sign=!fa.parts.sign; |
78 | fa.parts.sign=!fa.parts.sign; |
79 | return fa.d; |
79 | return fa.d; |
80 | }; |
80 | }; |
81 | 81 | ||
82 | /* Conversion functions */ |
82 | /* Conversion functions */ |
83 | 83 | ||
84 | /* Comparison functions */ |
84 | /* Comparison functions */ |
85 | 85 | ||
- | 86 | /* a<b .. -1 |
|
- | 87 | * a=b .. 0 |
|
- | 88 | * a>b .. 1 |
|
- | 89 | * */ |
|
- | 90 | ||
- | 91 | int __cmpsf2(double a, double b) |
|
- | 92 | { |
|
- | 93 | float32 fa,fb; |
|
- | 94 | fa.f=a; |
|
- | 95 | fb.f=b; |
|
- | 96 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
- | 97 | return 1; /* no special constant for unordered - maybe signaled? */ |
|
- | 98 | }; |
|
- | 99 | ||
- | 100 | ||
- | 101 | if (isFloat32eq(fa,fb)) { |
|
- | 102 | return 0; |
|
- | 103 | }; |
|
- | 104 | ||
- | 105 | if (isFloat32lt(fa,fb)) { |
|
- | 106 | return -1; |
|
- | 107 | }; |
|
- | 108 | return 1; |
|
- | 109 | } |
|
- | 110 | ||
- | 111 | int __unordsf2(float a, float b) |
|
- | 112 | { |
|
- | 113 | float32 fa,fb; |
|
- | 114 | fa.f=a; |
|
- | 115 | fb.f=b; |
|
- | 116 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
|
- | 117 | }; |
|
- | 118 | ||
- | 119 | /** |
|
- | 120 | * @return zero, if neither argument is a NaN and are equal |
|
- | 121 | * */ |
|
- | 122 | int __eqsf2(float a, float b) |
|
- | 123 | { |
|
- | 124 | float32 fa,fb; |
|
- | 125 | fa.f=a; |
|
- | 126 | fb.f=b; |
|
- | 127 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
- | 128 | /* TODO: sigNaNs*/ |
|
- | 129 | return 1; |
|
- | 130 | }; |
|
- | 131 | return isFloat32eq(fa,fb)-1; |
|
- | 132 | }; |
|
- | 133 | ||
- | 134 | /* strange behavior, but it was in gcc documentation */ |
|
- | 135 | int __nesf2(float a, float b) |
|
- | 136 | { |
|
- | 137 | return __eqsf2(a,b); |
|
- | 138 | }; |
|
86 | /* Other functions */ |
139 | /* Other functions */ |
87 | 140 | ||
88 | 141 |