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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) { |
| 60 | fb.parts.sign!=fb.parts.sign; |
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| 61 | return addFloat32(fa,fb).f; |
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| 62 | } |
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| 563 | cejka | 63 | return subFloat32(fa,fb).f; |
| 542 | cejka | 64 | }; |
| 65 | |||
| 66 | float __negsf2(float a) |
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| 67 | { |
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| 68 | float32 fa; |
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| 69 | fa.f=a; |
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| 70 | fa.parts.sign=!fa.parts.sign; |
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| 71 | return fa.f; |
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| 72 | }; |
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| 73 | |||
| 74 | double __negdf2(double a) |
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| 75 | { |
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| 76 | float64 fa; |
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| 563 | cejka | 77 | fa.d=a; |
| 542 | cejka | 78 | fa.parts.sign=!fa.parts.sign; |
| 563 | cejka | 79 | return fa.d; |
| 542 | cejka | 80 | }; |
| 81 | |||
| 647 | cejka | 82 | /* Conversion functions */ |
| 542 | cejka | 83 | |
| 647 | cejka | 84 | /* Comparison functions */ |
| 542 | cejka | 85 | |
| 652 | cejka | 86 | /* a<b .. -1 |
| 87 | * a=b .. 0 |
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| 88 | * a>b .. 1 |
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| 89 | * */ |
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| 90 | |||
| 91 | int __cmpsf2(double a, double b) |
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| 92 | { |
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| 93 | float32 fa,fb; |
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| 94 | fa.f=a; |
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| 95 | fb.f=b; |
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| 96 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 97 | return 1; /* no special constant for unordered - maybe signaled? */ |
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| 98 | }; |
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| 99 | |||
| 100 | |||
| 101 | if (isFloat32eq(fa,fb)) { |
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| 102 | return 0; |
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| 103 | }; |
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| 104 | |||
| 105 | if (isFloat32lt(fa,fb)) { |
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| 106 | return -1; |
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| 107 | }; |
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| 108 | return 1; |
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| 109 | } |
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| 110 | |||
| 111 | int __unordsf2(float a, float b) |
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| 112 | { |
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| 113 | float32 fa,fb; |
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| 114 | fa.f=a; |
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| 115 | fb.f=b; |
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| 116 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
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| 117 | }; |
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| 118 | |||
| 119 | /** |
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| 120 | * @return zero, if neither argument is a NaN and are equal |
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| 121 | * */ |
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| 122 | int __eqsf2(float a, float b) |
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| 123 | { |
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| 124 | float32 fa,fb; |
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| 125 | fa.f=a; |
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| 126 | fb.f=b; |
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| 127 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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| 128 | /* TODO: sigNaNs*/ |
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| 129 | return 1; |
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| 130 | }; |
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| 131 | return isFloat32eq(fa,fb)-1; |
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| 132 | }; |
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| 133 | |||
| 134 | /* strange behavior, but it was in gcc documentation */ |
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| 135 | int __nesf2(float a, float b) |
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| 136 | { |
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| 137 | return __eqsf2(a,b); |
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| 138 | }; |
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| 647 | cejka | 139 | /* Other functions */ |
| 542 | cejka | 140 |