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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 __mulsf3(float a, float b) |
|
- | 67 | { |
|
- | 68 | float32 fa, fb; |
|
- | 69 | fa.f=a; |
|
- | 70 | fb.f=b; |
|
- | 71 | return mulFloat32(fa, fb).f; |
|
- | 72 | } |
|
- | 73 | ||
66 | float __negsf2(float a) |
74 | float __negsf2(float a) |
67 | { |
75 | { |
68 | float32 fa; |
76 | float32 fa; |
69 | fa.f=a; |
77 | fa.f=a; |
70 | fa.parts.sign=!fa.parts.sign; |
78 | fa.parts.sign=!fa.parts.sign; |
71 | return fa.f; |
79 | return fa.f; |
72 | }; |
80 | }; |
73 | 81 | ||
74 | double __negdf2(double a) |
82 | double __negdf2(double a) |
75 | { |
83 | { |
76 | float64 fa; |
84 | float64 fa; |
77 | fa.d=a; |
85 | fa.d=a; |
78 | fa.parts.sign=!fa.parts.sign; |
86 | fa.parts.sign=!fa.parts.sign; |
79 | return fa.d; |
87 | return fa.d; |
80 | }; |
88 | }; |
81 | 89 | ||
82 | /* Conversion functions */ |
90 | /* Conversion functions */ |
83 | 91 | ||
84 | /* Comparison functions */ |
92 | /* Comparison functions */ |
85 | 93 | ||
86 | /* a<b .. -1 |
94 | /* a<b .. -1 |
87 | * a=b .. 0 |
95 | * a=b .. 0 |
88 | * a>b .. 1 |
96 | * a>b .. 1 |
89 | * */ |
97 | * */ |
90 | 98 | ||
91 | int __cmpsf2(float a, float b) |
99 | int __cmpsf2(float a, float b) |
92 | { |
100 | { |
93 | float32 fa,fb; |
101 | float32 fa,fb; |
94 | fa.f=a; |
102 | fa.f=a; |
95 | fb.f=b; |
103 | fb.f=b; |
96 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
104 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
97 | return 1; /* no special constant for unordered - maybe signaled? */ |
105 | return 1; /* no special constant for unordered - maybe signaled? */ |
98 | }; |
106 | }; |
99 | 107 | ||
100 | 108 | ||
101 | if (isFloat32eq(fa,fb)) { |
109 | if (isFloat32eq(fa,fb)) { |
102 | return 0; |
110 | return 0; |
103 | }; |
111 | }; |
104 | 112 | ||
105 | if (isFloat32lt(fa,fb)) { |
113 | if (isFloat32lt(fa,fb)) { |
106 | return -1; |
114 | return -1; |
107 | }; |
115 | }; |
108 | return 1; |
116 | return 1; |
109 | } |
117 | } |
110 | 118 | ||
111 | int __unordsf2(float a, float b) |
119 | int __unordsf2(float a, float b) |
112 | { |
120 | { |
113 | float32 fa,fb; |
121 | float32 fa,fb; |
114 | fa.f=a; |
122 | fa.f=a; |
115 | fb.f=b; |
123 | fb.f=b; |
116 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
124 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
117 | }; |
125 | }; |
118 | 126 | ||
119 | /** |
127 | /** |
120 | * @return zero, if neither argument is a NaN and are equal |
128 | * @return zero, if neither argument is a NaN and are equal |
121 | * */ |
129 | * */ |
122 | int __eqsf2(float a, float b) |
130 | int __eqsf2(float a, float b) |
123 | { |
131 | { |
124 | float32 fa,fb; |
132 | float32 fa,fb; |
125 | fa.f=a; |
133 | fa.f=a; |
126 | fb.f=b; |
134 | fb.f=b; |
127 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
135 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
128 | /* TODO: sigNaNs*/ |
136 | /* TODO: sigNaNs*/ |
129 | return 1; |
137 | return 1; |
130 | }; |
138 | }; |
131 | return isFloat32eq(fa,fb)-1; |
139 | return isFloat32eq(fa,fb)-1; |
132 | }; |
140 | }; |
133 | 141 | ||
134 | /* strange behavior, but it was in gcc documentation */ |
142 | /* strange behavior, but it was in gcc documentation */ |
135 | int __nesf2(float a, float b) |
143 | int __nesf2(float a, float b) |
136 | { |
144 | { |
137 | return __eqsf2(a,b); |
145 | return __eqsf2(a,b); |
138 | }; |
146 | }; |
139 | 147 | ||
140 | /* return value >= 0 if a>=b and neither is NaN */ |
148 | /* return value >= 0 if a>=b and neither is NaN */ |
141 | int __gesf2(float a, float b) |
149 | int __gesf2(float a, float b) |
142 | { |
150 | { |
143 | float32 fa,fb; |
151 | float32 fa,fb; |
144 | fa.f=a; |
152 | fa.f=a; |
145 | fb.f=b; |
153 | fb.f=b; |
146 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
154 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
147 | /* TODO: sigNaNs*/ |
155 | /* TODO: sigNaNs*/ |
148 | return -1; |
156 | return -1; |
149 | }; |
157 | }; |
150 | 158 | ||
151 | if (isFloat32eq(fa,fb)) { |
159 | if (isFloat32eq(fa,fb)) { |
152 | return 0; |
160 | return 0; |
153 | }; |
161 | }; |
154 | 162 | ||
155 | if (isFloat32gt(fa,fb)) { |
163 | if (isFloat32gt(fa,fb)) { |
156 | return 1; |
164 | return 1; |
157 | }; |
165 | }; |
158 | 166 | ||
159 | return -1; |
167 | return -1; |
160 | } |
168 | } |
161 | 169 | ||
162 | /** Return negative value, if a<b and neither is NaN*/ |
170 | /** Return negative value, if a<b and neither is NaN*/ |
163 | int __ltsf2(float a, float b) |
171 | int __ltsf2(float a, float b) |
164 | { |
172 | { |
165 | float32 fa,fb; |
173 | float32 fa,fb; |
166 | fa.f=a; |
174 | fa.f=a; |
167 | fb.f=b; |
175 | fb.f=b; |
168 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
176 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
169 | /* TODO: sigNaNs*/ |
177 | /* TODO: sigNaNs*/ |
170 | return 1; |
178 | return 1; |
171 | }; |
179 | }; |
172 | if (isFloat32lt(fa, fb)) { |
180 | if (isFloat32lt(fa, fb)) { |
173 | return -1; |
181 | return -1; |
174 | }; |
182 | }; |
175 | return 0; |
183 | return 0; |
176 | } |
184 | } |
177 | 185 | ||
178 | /* return value <= 0 if a<=b and neither is NaN */ |
186 | /* return value <= 0 if a<=b and neither is NaN */ |
179 | int __lesf2(float a, float b) |
187 | int __lesf2(float a, float b) |
180 | { |
188 | { |
181 | float32 fa,fb; |
189 | float32 fa,fb; |
182 | fa.f=a; |
190 | fa.f=a; |
183 | fb.f=b; |
191 | fb.f=b; |
184 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
192 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
185 | /* TODO: sigNaNs*/ |
193 | /* TODO: sigNaNs*/ |
186 | return 1; |
194 | return 1; |
187 | }; |
195 | }; |
188 | 196 | ||
189 | if (isFloat32eq(fa,fb)) { |
197 | if (isFloat32eq(fa,fb)) { |
190 | return 0; |
198 | return 0; |
191 | }; |
199 | }; |
192 | 200 | ||
193 | if (isFloat32lt(fa,fb)) { |
201 | if (isFloat32lt(fa,fb)) { |
194 | return -1; |
202 | return -1; |
195 | }; |
203 | }; |
196 | 204 | ||
197 | return 1; |
205 | return 1; |
198 | } |
206 | } |
199 | 207 | ||
200 | /** Return positive value, if a>b and neither is NaN*/ |
208 | /** Return positive value, if a>b and neither is NaN*/ |
201 | int __gtsf2(float a, float b) |
209 | int __gtsf2(float a, float b) |
202 | { |
210 | { |
203 | float32 fa,fb; |
211 | float32 fa,fb; |
204 | fa.f=a; |
212 | fa.f=a; |
205 | fb.f=b; |
213 | fb.f=b; |
206 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
214 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
207 | /* TODO: sigNaNs*/ |
215 | /* TODO: sigNaNs*/ |
208 | return -1; |
216 | return -1; |
209 | }; |
217 | }; |
210 | if (isFloat32gt(fa, fb)) { |
218 | if (isFloat32gt(fa, fb)) { |
211 | return 1; |
219 | return 1; |
212 | }; |
220 | }; |
213 | return 0; |
221 | return 0; |
214 | } |
222 | } |
215 | 223 | ||
216 | /* Other functions */ |
224 | /* Other functions */ |
217 | 225 | ||
218 | 226 |