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| Rev | Author | Line No. | Line |
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| 535 | cejka | 1 | /* |
| 2 | * Copyright (C) 2005 Josef Cejka |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include<softfloat.h> |
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| 647 | cejka | 30 | #include<sftypes.h> |
| 31 | #include<arithmetic.h> |
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| 32 | #include<conversion.h> |
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| 33 | #include<comparison.h> |
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| 34 | #include<other.h> |
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| 535 | cejka | 35 | |
| 647 | cejka | 36 | /* Arithmetic functions */ |
| 542 | cejka | 37 | |
| 38 | float __addsf3(float a, float b) |
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| 39 | { |
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| 40 | float32 fa, fb; |
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| 563 | cejka | 41 | fa.f=a; |
| 42 | fb.f=b; |
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| 647 | cejka | 43 | if (fa.parts.sign!=fb.parts.sign) { |
| 44 | if (fa.parts.sign) { |
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| 45 | fa.parts.sign=0; |
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| 46 | return subFloat32(fb,fa).f; |
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| 47 | }; |
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| 48 | fb.parts.sign=0; |
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| 49 | return subFloat32(fa,fb).f; |
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| 50 | } |
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| 563 | cejka | 51 | return addFloat32(fa,fb).f; |
| 542 | cejka | 52 | }; |
| 53 | |||
| 54 | float __subsf3(float a, float b) |
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| 55 | { |
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| 56 | float32 fa, fb; |
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| 563 | cejka | 57 | fa.f=a; |
| 58 | fb.f=b; |
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| 647 | cejka | 59 | if (fa.parts.sign!=fb.parts.sign) { |
| 660 | cejka | 60 | fb.parts.sign=!fb.parts.sign; |
| 647 | cejka | 61 | return addFloat32(fa,fb).f; |
| 62 | } |
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| 563 | cejka | 63 | return subFloat32(fa,fb).f; |
| 542 | cejka | 64 | }; |
| 65 | |||
| 688 | cejka | 66 | float __mulsf3(float a, float b) |
| 67 | { |
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| 68 | float32 fa, fb; |
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| 69 | fa.f=a; |
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| 70 | fb.f=b; |
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| 71 | return mulFloat32(fa, fb).f; |
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| 72 | } |
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| 73 | |||
| 542 | cejka | 74 | float __negsf2(float a) |
| 75 | { |
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| 76 | float32 fa; |
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| 77 | fa.f=a; |
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| 78 | fa.parts.sign=!fa.parts.sign; |
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| 79 | return fa.f; |
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| 80 | }; |
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| 81 | |||
| 82 | double __negdf2(double a) |
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| 83 | { |
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| 84 | float64 fa; |
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| 563 | cejka | 85 | fa.d=a; |
| 542 | cejka | 86 | fa.parts.sign=!fa.parts.sign; |
| 563 | cejka | 87 | return fa.d; |
| 542 | cejka | 88 | }; |
| 89 | |||
| 647 | cejka | 90 | /* Conversion functions */ |
| 542 | cejka | 91 | |
| 647 | cejka | 92 | /* Comparison functions */ |
| 542 | cejka | 93 | |
| 652 | cejka | 94 | /* a<b .. -1 |
| 95 | * a=b .. 0 |
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| 96 | * a>b .. 1 |
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| 97 | * */ |
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| 98 | |||
| 660 | cejka | 99 | int __cmpsf2(float a, float b) |
| 652 | cejka | 100 | { |
| 101 | float32 fa,fb; |
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| 102 | fa.f=a; |
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| 103 | fb.f=b; |
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| 104 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 105 | return 1; /* no special constant for unordered - maybe signaled? */ |
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| 106 | }; |
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| 107 | |||
| 108 | |||
| 109 | if (isFloat32eq(fa,fb)) { |
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| 110 | return 0; |
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| 111 | }; |
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| 112 | |||
| 113 | if (isFloat32lt(fa,fb)) { |
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| 114 | return -1; |
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| 115 | }; |
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| 116 | return 1; |
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| 117 | } |
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| 118 | |||
| 119 | int __unordsf2(float a, float b) |
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| 120 | { |
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| 121 | float32 fa,fb; |
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| 122 | fa.f=a; |
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| 123 | fb.f=b; |
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| 124 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
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| 125 | }; |
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| 126 | |||
| 127 | /** |
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| 128 | * @return zero, if neither argument is a NaN and are equal |
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| 129 | * */ |
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| 130 | int __eqsf2(float a, float b) |
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| 131 | { |
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| 132 | float32 fa,fb; |
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| 133 | fa.f=a; |
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| 134 | fb.f=b; |
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| 135 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 136 | /* TODO: sigNaNs*/ |
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| 137 | return 1; |
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| 138 | }; |
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| 139 | return isFloat32eq(fa,fb)-1; |
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| 140 | }; |
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| 141 | |||
| 142 | /* strange behavior, but it was in gcc documentation */ |
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| 143 | int __nesf2(float a, float b) |
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| 144 | { |
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| 145 | return __eqsf2(a,b); |
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| 146 | }; |
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| 653 | cejka | 147 | |
| 148 | /* return value >= 0 if a>=b and neither is NaN */ |
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| 149 | int __gesf2(float a, float b) |
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| 150 | { |
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| 151 | float32 fa,fb; |
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| 152 | fa.f=a; |
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| 153 | fb.f=b; |
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| 154 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 155 | /* TODO: sigNaNs*/ |
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| 660 | cejka | 156 | return -1; |
| 653 | cejka | 157 | }; |
| 158 | |||
| 159 | if (isFloat32eq(fa,fb)) { |
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| 160 | return 0; |
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| 161 | }; |
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| 162 | |||
| 163 | if (isFloat32gt(fa,fb)) { |
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| 164 | return 1; |
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| 165 | }; |
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| 166 | |||
| 167 | return -1; |
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| 168 | } |
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| 169 | |||
| 170 | /** Return negative value, if a<b and neither is NaN*/ |
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| 171 | int __ltsf2(float a, float b) |
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| 172 | { |
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| 173 | float32 fa,fb; |
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| 174 | fa.f=a; |
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| 175 | fb.f=b; |
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| 176 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 177 | /* TODO: sigNaNs*/ |
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| 178 | return 1; |
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| 179 | }; |
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| 180 | if (isFloat32lt(fa, fb)) { |
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| 181 | return -1; |
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| 182 | }; |
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| 183 | return 0; |
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| 184 | } |
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| 185 | |||
| 186 | /* return value <= 0 if a<=b and neither is NaN */ |
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| 187 | int __lesf2(float a, float b) |
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| 188 | { |
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| 189 | float32 fa,fb; |
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| 190 | fa.f=a; |
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| 191 | fb.f=b; |
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| 192 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 193 | /* TODO: sigNaNs*/ |
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| 194 | return 1; |
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| 195 | }; |
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| 196 | |||
| 197 | if (isFloat32eq(fa,fb)) { |
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| 198 | return 0; |
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| 199 | }; |
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| 200 | |||
| 201 | if (isFloat32lt(fa,fb)) { |
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| 202 | return -1; |
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| 203 | }; |
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| 204 | |||
| 205 | return 1; |
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| 206 | } |
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| 207 | |||
| 208 | /** Return positive value, if a>b and neither is NaN*/ |
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| 660 | cejka | 209 | int __gtsf2(float a, float b) |
| 653 | cejka | 210 | { |
| 211 | float32 fa,fb; |
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| 212 | fa.f=a; |
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| 213 | fb.f=b; |
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| 214 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 215 | /* TODO: sigNaNs*/ |
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| 660 | cejka | 216 | return -1; |
| 653 | cejka | 217 | }; |
| 218 | if (isFloat32gt(fa, fb)) { |
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| 219 | return 1; |
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| 220 | }; |
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| 221 | return 0; |
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| 222 | } |
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| 223 | |||
| 647 | cejka | 224 | /* Other functions */ |
| 542 | cejka | 225 |