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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 |
86 | /* a<b .. -1 |
| 87 | * a=b .. 0 |
87 | * a=b .. 0 |
| 88 | * a>b .. 1 |
88 | * a>b .. 1 |
| 89 | * */ |
89 | * */ |
| 90 | 90 | ||
| 91 | int __cmpsf2(double a, double b) |
91 | int __cmpsf2(double a, double b) |
| 92 | { |
92 | { |
| 93 | float32 fa,fb; |
93 | float32 fa,fb; |
| 94 | fa.f=a; |
94 | fa.f=a; |
| 95 | fb.f=b; |
95 | fb.f=b; |
| 96 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
96 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
| 97 | return 1; /* no special constant for unordered - maybe signaled? */ |
97 | return 1; /* no special constant for unordered - maybe signaled? */ |
| 98 | }; |
98 | }; |
| 99 | 99 | ||
| 100 | 100 | ||
| 101 | if (isFloat32eq(fa,fb)) { |
101 | if (isFloat32eq(fa,fb)) { |
| 102 | return 0; |
102 | return 0; |
| 103 | }; |
103 | }; |
| 104 | 104 | ||
| 105 | if (isFloat32lt(fa,fb)) { |
105 | if (isFloat32lt(fa,fb)) { |
| 106 | return -1; |
106 | return -1; |
| 107 | }; |
107 | }; |
| 108 | return 1; |
108 | return 1; |
| 109 | } |
109 | } |
| 110 | 110 | ||
| 111 | int __unordsf2(float a, float b) |
111 | int __unordsf2(float a, float b) |
| 112 | { |
112 | { |
| 113 | float32 fa,fb; |
113 | float32 fa,fb; |
| 114 | fa.f=a; |
114 | fa.f=a; |
| 115 | fb.f=b; |
115 | fb.f=b; |
| 116 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
116 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
| 117 | }; |
117 | }; |
| 118 | 118 | ||
| 119 | /** |
119 | /** |
| 120 | * @return zero, if neither argument is a NaN and are equal |
120 | * @return zero, if neither argument is a NaN and are equal |
| 121 | * */ |
121 | * */ |
| 122 | int __eqsf2(float a, float b) |
122 | int __eqsf2(float a, float b) |
| 123 | { |
123 | { |
| 124 | float32 fa,fb; |
124 | float32 fa,fb; |
| 125 | fa.f=a; |
125 | fa.f=a; |
| 126 | fb.f=b; |
126 | fb.f=b; |
| 127 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
127 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
| 128 | /* TODO: sigNaNs*/ |
128 | /* TODO: sigNaNs*/ |
| 129 | return 1; |
129 | return 1; |
| 130 | }; |
130 | }; |
| 131 | return isFloat32eq(fa,fb)-1; |
131 | return isFloat32eq(fa,fb)-1; |
| 132 | }; |
132 | }; |
| 133 | 133 | ||
| 134 | /* strange behavior, but it was in gcc documentation */ |
134 | /* strange behavior, but it was in gcc documentation */ |
| 135 | int __nesf2(float a, float b) |
135 | int __nesf2(float a, float b) |
| 136 | { |
136 | { |
| 137 | return __eqsf2(a,b); |
137 | return __eqsf2(a,b); |
| 138 | }; |
138 | }; |
| - | 139 | ||
| - | 140 | /* return value >= 0 if a>=b and neither is NaN */ |
|
| - | 141 | int __gesf2(float a, float b) |
|
| - | 142 | { |
|
| - | 143 | float32 fa,fb; |
|
| - | 144 | fa.f=a; |
|
| - | 145 | fb.f=b; |
|
| - | 146 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
| - | 147 | /* TODO: sigNaNs*/ |
|
| - | 148 | return 1; |
|
| - | 149 | }; |
|
| - | 150 | ||
| - | 151 | if (isFloat32eq(fa,fb)) { |
|
| - | 152 | return 0; |
|
| - | 153 | }; |
|
| - | 154 | ||
| - | 155 | if (isFloat32gt(fa,fb)) { |
|
| - | 156 | return 1; |
|
| - | 157 | }; |
|
| - | 158 | ||
| - | 159 | return -1; |
|
| - | 160 | } |
|
| - | 161 | ||
| - | 162 | /** Return negative value, if a<b and neither is NaN*/ |
|
| - | 163 | int __ltsf2(float a, float b) |
|
| - | 164 | { |
|
| - | 165 | float32 fa,fb; |
|
| - | 166 | fa.f=a; |
|
| - | 167 | fb.f=b; |
|
| - | 168 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
| - | 169 | /* TODO: sigNaNs*/ |
|
| - | 170 | return 1; |
|
| - | 171 | }; |
|
| - | 172 | if (isFloat32lt(fa, fb)) { |
|
| - | 173 | return -1; |
|
| - | 174 | }; |
|
| - | 175 | return 0; |
|
| - | 176 | } |
|
| - | 177 | ||
| - | 178 | /* return value <= 0 if a<=b and neither is NaN */ |
|
| - | 179 | int __lesf2(float a, float b) |
|
| - | 180 | { |
|
| - | 181 | float32 fa,fb; |
|
| - | 182 | fa.f=a; |
|
| - | 183 | fb.f=b; |
|
| - | 184 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
| - | 185 | /* TODO: sigNaNs*/ |
|
| - | 186 | return 1; |
|
| - | 187 | }; |
|
| - | 188 | ||
| - | 189 | if (isFloat32eq(fa,fb)) { |
|
| - | 190 | return 0; |
|
| - | 191 | }; |
|
| - | 192 | ||
| - | 193 | if (isFloat32lt(fa,fb)) { |
|
| - | 194 | return -1; |
|
| - | 195 | }; |
|
| - | 196 | ||
| - | 197 | return 1; |
|
| - | 198 | } |
|
| - | 199 | ||
| - | 200 | /** Return positive value, if a>b and neither is NaN*/ |
|
| - | 201 | int __ltsf2(float a, float b) |
|
| - | 202 | { |
|
| - | 203 | float32 fa,fb; |
|
| - | 204 | fa.f=a; |
|
| - | 205 | fb.f=b; |
|
| - | 206 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
|
| - | 207 | /* TODO: sigNaNs*/ |
|
| - | 208 | return 1; |
|
| - | 209 | }; |
|
| - | 210 | if (isFloat32gt(fa, fb)) { |
|
| - | 211 | return 1; |
|
| - | 212 | }; |
|
| - | 213 | return 0; |
|
| - | 214 | } |
|
| - | 215 | ||
| 139 | /* Other functions */ |
216 | /* Other functions */ |
| 140 | 217 | ||
| 141 | 218 | ||