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