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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<sftypes.h> |
29 | #include<sftypes.h> |
| 30 | #include<comparison.h> |
30 | #include<comparison.h> |
| 31 | 31 | ||
| 32 | inline int isFloat32NaN(float32 f) |
32 | inline int isFloat32NaN(float32 f) |
| 33 | { /* NaN : exp = 0xff and nonzero mantisa */ |
33 | { /* NaN : exp = 0xff and nonzero mantisa */ |
| 34 | return ((f.parts.exp==0xFF)&&(f.parts.mantisa)); |
34 | return ((f.parts.exp==0xFF)&&(f.parts.mantisa)); |
| 35 | }; |
35 | }; |
| 36 | 36 | ||
| 37 | inline int isFloat32SigNaN(float32 f) |
37 | inline int isFloat32SigNaN(float32 f) |
| 38 | { /* SigNaN : exp = 0xff mantisa = 1xxxxx..x (binary), where at least one x is nonzero */ |
38 | { /* SigNaN : exp = 0xff mantisa = 1xxxxx..x (binary), where at least one x is nonzero */ |
| 39 | return ((f.parts.exp==0xFF)&&(f.parts.mantisa>0x400000)); |
39 | return ((f.parts.exp==0xFF)&&(f.parts.mantisa>0x400000)); |
| 40 | }; |
40 | }; |
| 41 | 41 | ||
| - | 42 | inline int isFloat32Infinity(float32 f) |
|
| - | 43 | { |
|
| - | 44 | return ((f.parts.exp==0xFF)&&(f.parts.mantisa==0x0)); |
|
| - | 45 | }; |
|
| - | 46 | ||
| - | 47 | /** |
|
| - | 48 | * @return 1, if both floats are equal - but NaNs are not recognized |
|
| - | 49 | */ |
|
| - | 50 | inline int isFloat32eq(float32 a, float32 b) |
|
| - | 51 | { |
|
| - | 52 | return ((a==b)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */ |
|
| - | 53 | } |
|
| - | 54 | ||
| - | 55 | /** |
|
| - | 56 | * @return 1, if a>b - but NaNs are not recognized |
|
| - | 57 | */ |
|
| - | 58 | inline int isFloat32lt(float32 a, float32 b) |
|
| - | 59 | { |
|
| - | 60 | if (((a.binary| b.binary)&0x7FFFFFFF)==0) { |
|
| - | 61 | return 0; |
|
| - | 62 | }; |
|
| - | 63 | a.parts.sign^=a.parts.sign; |
|
| - | 64 | b.parts.sign^=b.parts.sign; |
|
| - | 65 | return (a.binary<b.binary); |
|
| - | 66 | ||
| - | 67 | } |
|
| - | 68 | ||
| - | 69 | ||
| 42 | 70 | ||