0,0 → 1,67 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
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#include <arch/types.h> |
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#define FMATH_EXPONENT_BIAS 1023 |
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typedef unsigned char fmath_ld_descr_t[8]; |
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typedef union { double bf; unsigned char ldd[8]; } fmath_ld_union_t; |
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int fmath_is_negative(double num); |
//int fmath_is_exponent_negative(double num); |
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/**returns exponent in binary encoding*/ |
signed short fmath_get_binary_exponent(double num); |
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/**returns exponent in decimal encoding*/ |
double fmath_get_decimal_exponent(double num); |
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/**returns mantisa in binary encoding */ |
__u64 fmath_get_binary_mantisa(double num) ; |
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/** Function for extract integer part from double |
* @param num input value |
* @param intp integer part of num |
* @return non-integer part |
*/ |
double fmath_fint(double num, double *intp); |
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/** Return absolute value from num */ |
double fmath_abs(double num); |
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double fmath_set_sign(double num,__u8 sign); |
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/** count base^exponent from positive exponent |
* @param base |
* @param exponent - Must be > 0.0 |
* @return base^exponent or 0.0 (if exponent <=0.0) |
*/ |
double fmath_dpow(double base, double exponent) ; |
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