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| 230 | 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 | |||
| 342 | jermar | 29 | #ifndef __ppc32_FMATH_H__ |
| 30 | #define __ppc32_FMATH_H__ |
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| 31 | |||
| 230 | cejka | 32 | #include <arch/types.h> |
| 33 | |||
| 34 | #define FMATH_EXPONENT_BIAS 1023 |
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| 35 | |||
| 36 | typedef unsigned char fmath_ld_descr_t[8]; |
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| 37 | |||
| 38 | typedef union { double bf; unsigned char ldd[8]; } fmath_ld_union_t; |
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| 39 | |||
| 40 | /**returns exponent in binary encoding*/ |
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| 41 | signed short fmath_get_binary_exponent(double num); |
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| 42 | |||
| 43 | /**returns exponent in decimal encoding*/ |
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| 44 | double fmath_get_decimal_exponent(double num); |
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| 45 | |||
| 46 | /**returns mantisa in binary encoding */ |
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| 47 | __u64 fmath_get_binary_mantisa(double num) ; |
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| 48 | |||
| 49 | /** Function for extract integer part from double |
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| 50 | * @param num input value |
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| 51 | * @param intp integer part of num |
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| 52 | * @return non-integer part |
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| 53 | */ |
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| 54 | double fmath_fint(double num, double *intp); |
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| 55 | |||
| 56 | /** count base^exponent from positive exponent |
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| 57 | * @param base |
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| 58 | * @param exponent - Must be > 0.0 |
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| 59 | * @return base^exponent or 0.0 (if exponent <=0.0) |
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| 60 | */ |
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| 61 | double fmath_dpow(double base, double exponent) ; |
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| 62 | |||
| 266 | cejka | 63 | /** return 1, if num is NaN */ |
| 64 | int fmath_is_nan(double num); |
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| 65 | |||
| 66 | /** return 1, if fmath is a infinity */ |
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| 67 | int fmath_is_infinity(double num); |
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| 342 | jermar | 68 | |
| 69 | #endif |