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| Rev | Author | Line No. | Line |
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| 647 | 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<sftypes.h> |
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| 30 | #include<comparison.h> |
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| 31 | |||
| 32 | inline int isFloat32NaN(float32 f) |
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| 804 | cejka | 33 | { /* NaN : exp = 0xff and nonzero fraction */ |
| 34 | return ((f.parts.exp==0xFF)&&(f.parts.fraction)); |
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| 1035 | cejka | 35 | } |
| 647 | cejka | 36 | |
| 697 | cejka | 37 | inline int isFloat64NaN(float64 d) |
| 804 | cejka | 38 | { /* NaN : exp = 0x7ff and nonzero fraction */ |
| 39 | return ((d.parts.exp==0x7FF)&&(d.parts.fraction)); |
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| 1035 | cejka | 40 | } |
| 697 | cejka | 41 | |
| 647 | cejka | 42 | inline int isFloat32SigNaN(float32 f) |
| 804 | cejka | 43 | { /* SigNaN : exp = 0xff fraction = 0xxxxx..x (binary), where at least one x is nonzero */ |
| 44 | return ((f.parts.exp==0xFF)&&(f.parts.fraction<0x400000)&&(f.parts.fraction)); |
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| 1035 | cejka | 45 | } |
| 647 | cejka | 46 | |
| 697 | cejka | 47 | inline int isFloat64SigNaN(float64 d) |
| 804 | cejka | 48 | { /* SigNaN : exp = 0x7ff fraction = 0xxxxx..x (binary), where at least one x is nonzero */ |
| 49 | return ((d.parts.exp==0x7FF)&&(d.parts.fraction)&&(d.parts.fraction<0x8000000000000ll)); |
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| 1035 | cejka | 50 | } |
| 697 | cejka | 51 | |
| 652 | cejka | 52 | inline int isFloat32Infinity(float32 f) |
| 53 | { |
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| 804 | cejka | 54 | return ((f.parts.exp==0xFF)&&(f.parts.fraction==0x0)); |
| 1035 | cejka | 55 | } |
| 652 | cejka | 56 | |
| 697 | cejka | 57 | inline int isFloat64Infinity(float64 d) |
| 58 | { |
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| 804 | cejka | 59 | return ((d.parts.exp==0x7FF)&&(d.parts.fraction==0x0)); |
| 1035 | cejka | 60 | } |
| 697 | cejka | 61 | |
| 688 | cejka | 62 | inline int isFloat32Zero(float32 f) |
| 63 | { |
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| 64 | return (((f.binary) & 0x7FFFFFFF) == 0); |
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| 65 | } |
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| 66 | |||
| 697 | cejka | 67 | inline int isFloat64Zero(float64 d) |
| 68 | { |
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| 69 | return (((d.binary) & 0x7FFFFFFFFFFFFFFFll) == 0); |
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| 70 | } |
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| 71 | |||
| 652 | cejka | 72 | /** |
| 73 | * @return 1, if both floats are equal - but NaNs are not recognized |
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| 74 | */ |
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| 75 | inline int isFloat32eq(float32 a, float32 b) |
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| 76 | { |
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| 660 | cejka | 77 | return ((a.binary==b.binary)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */ |
| 652 | cejka | 78 | } |
| 79 | |||
| 80 | /** |
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| 653 | cejka | 81 | * @return 1, if a<b - but NaNs are not recognized |
| 652 | cejka | 82 | */ |
| 83 | inline int isFloat32lt(float32 a, float32 b) |
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| 84 | { |
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| 85 | if (((a.binary| b.binary)&0x7FFFFFFF)==0) { |
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| 660 | cejka | 86 | return 0; /* +- zeroes */ |
| 652 | cejka | 87 | }; |
| 660 | cejka | 88 | |
| 89 | if ((a.parts.sign)&&(b.parts.sign)) { |
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| 90 | /*if both are negative, smaller is that with greater binary value*/ |
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| 91 | return (a.binary>b.binary); |
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| 92 | }; |
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| 93 | |||
| 94 | /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/ |
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| 95 | a.parts.sign=!a.parts.sign; |
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| 96 | b.parts.sign=!b.parts.sign; |
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| 652 | cejka | 97 | return (a.binary<b.binary); |
| 98 | |||
| 99 | } |
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| 100 | |||
| 653 | cejka | 101 | /** |
| 102 | * @return 1, if a>b - but NaNs are not recognized |
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| 103 | */ |
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| 104 | inline int isFloat32gt(float32 a, float32 b) |
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| 105 | { |
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| 106 | if (((a.binary| b.binary)&0x7FFFFFFF)==0) { |
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| 660 | cejka | 107 | return 0; /* zeroes are equal with any sign */ |
| 653 | cejka | 108 | }; |
| 660 | cejka | 109 | |
| 110 | if ((a.parts.sign)&&(b.parts.sign)) { |
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| 111 | /*if both are negative, greater is that with smaller binary value*/ |
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| 112 | return (a.binary<b.binary); |
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| 113 | }; |
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| 114 | |||
| 115 | /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/ |
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| 116 | a.parts.sign=!a.parts.sign; |
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| 117 | b.parts.sign=!b.parts.sign; |
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| 653 | cejka | 118 | return (a.binary>b.binary); |
| 119 | |||
| 120 | } |
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| 652 | cejka | 121 | |
| 653 | cejka | 122 | |
| 697 | cejka | 123 |