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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 <arch/types.h> |
29 | #include <arch/types.h> |
| 30 | 30 | ||
| 31 | #define FMATH_EXPONENT_BIAS 1023 |
31 | #define FMATH_EXPONENT_BIAS 1023 |
| 32 | 32 | ||
| 33 | typedef unsigned char fmath_ld_descr_t[8]; |
33 | typedef unsigned char fmath_ld_descr_t[8]; |
| 34 | 34 | ||
| 35 | typedef union { double bf; unsigned char ldd[8]; } fmath_ld_union_t; |
35 | typedef union { double bf; unsigned char ldd[8]; } fmath_ld_union_t; |
| 36 | 36 | ||
| 37 | int fmath_is_negative(double num); |
- | |
| 38 | //int fmath_is_exponent_negative(double num); |
- | |
| 39 | - | ||
| 40 | /**returns exponent in binary encoding*/ |
37 | /**returns exponent in binary encoding*/ |
| 41 | signed short fmath_get_binary_exponent(double num); |
38 | signed short fmath_get_binary_exponent(double num); |
| 42 | 39 | ||
| 43 | /**returns exponent in decimal encoding*/ |
40 | /**returns exponent in decimal encoding*/ |
| 44 | double fmath_get_decimal_exponent(double num); |
41 | double fmath_get_decimal_exponent(double num); |
| 45 | 42 | ||
| 46 | /**returns mantisa in binary encoding */ |
43 | /**returns mantisa in binary encoding */ |
| 47 | __u64 fmath_get_binary_mantisa(double num) ; |
44 | __u64 fmath_get_binary_mantisa(double num) ; |
| 48 | 45 | ||
| 49 | /** Function for extract integer part from double |
46 | /** Function for extract integer part from double |
| 50 | * @param num input value |
47 | * @param num input value |
| 51 | * @param intp integer part of num |
48 | * @param intp integer part of num |
| 52 | * @return non-integer part |
49 | * @return non-integer part |
| 53 | */ |
50 | */ |
| 54 | double fmath_fint(double num, double *intp); |
51 | double fmath_fint(double num, double *intp); |
| 55 | 52 | ||
| 56 | /** Return absolute value from num */ |
- | |
| 57 | double fmath_abs(double num); |
- | |
| 58 | - | ||
| 59 | double fmath_set_sign(double num,__u8 sign); |
- | |
| 60 | - | ||
| 61 | /** count base^exponent from positive exponent |
53 | /** count base^exponent from positive exponent |
| 62 | * @param base |
54 | * @param base |
| 63 | * @param exponent - Must be > 0.0 |
55 | * @param exponent - Must be > 0.0 |
| 64 | * @return base^exponent or 0.0 (if exponent <=0.0) |
56 | * @return base^exponent or 0.0 (if exponent <=0.0) |
| 65 | */ |
57 | */ |
| 66 | double fmath_dpow(double base, double exponent) ; |
58 | double fmath_dpow(double base, double exponent) ; |
| 67 | 59 | ||
| - | 60 | /** return 1, if num is NaN */ |
|
| - | 61 | int fmath_is_nan(double num); |
|
| - | 62 | ||
| - | 63 | /** return 1, if fmath is a infinity */ |
|
| - | 64 | int fmath_is_infinity(double num); |
|
| 68 | 65 | ||