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101 lines
4.5 KiB
C
101 lines
4.5 KiB
C
/*
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* IBM Accurate Mathematical Library
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* Written by International Business Machines Corp.
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* Copyright (C) 2001-2014 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/********************************************************************/
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/* Ultimate math functions. Each function computes the exact */
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/* theoretical value of its argument rounded to nearest or even. */
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/* */
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/* Assumption: Machine arithmetic operations are performed in */
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/* round nearest mode of IEEE 754 standard. */
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/********************************************************************/
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#ifndef UMATH_LIB
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#define UMATH_LIB
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/********************************************************************/
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/* Function changes the precision mode to IEEE 754 double precision */
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/* and the rounding mode to nearest or even. */
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/* It returns the original status of these modes. */
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/* See further explanations of usage in DPChange.h */
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/********************************************************************/
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unsigned short Init_Lib (void);
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/********************************************************************/
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/* Function that changes the precision and rounding modes to the */
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/* specified by the argument received. See further explanations in */
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/* DPChange.h */
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/********************************************************************/
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void Exit_Lib (unsigned short);
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/* The asin() function calculates the arc sine of its argument. */
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/* The function returns the arc sine in radians */
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/* (between -PI/2 and PI/2). */
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/* If the argument is greater than 1 or less than -1 it returns */
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/* a NaN. */
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double uasin (double);
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/* The acos() function calculates the arc cosine of its argument. */
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/* The function returns the arc cosine in radians */
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/* (between -PI/2 and PI/2). */
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/* If the argument is greater than 1 or less than -1 it returns */
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/* a NaN. */
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double uacos (double);
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/* The atan() function calculates the arctanget of its argument. */
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/* The function returns the arc tangent in radians */
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/* (between -PI/2 and PI/2). */
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double uatan (double);
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/* The uatan2() function calculates the arc tangent of the two arguments x */
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/* and y (x is the right argument and y is the left one).The signs of both */
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/* arguments are used to determine the quadrant of the result. */
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/* The function returns the result in radians, which is between -PI and PI */
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double uatan2 (double, double);
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/* Compute log(x). The base of log is e (natural logarithm) */
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double ulog (double);
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/* Compute e raised to the power of argument x. */
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double uexp (double);
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/* Compute sin(x). The argument x is assumed to be given in radians.*/
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double usin (double);
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/* Compute cos(x). The argument x is assumed to be given in radians.*/
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double ucos (double);
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/* Compute tan(x). The argument x is assumed to be given in radians.*/
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double utan (double);
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/* Compute the square root of non-negative argument x. */
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/* If x is negative the returned value is NaN. */
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double usqrt (double);
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/* Compute x raised to the power of y, where x is the left argument */
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/* and y is the right argument. The function returns a NaN if x<0. */
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/* If x equals zero it returns -inf */
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double upow (double, double);
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/* Computing x mod y, where x is the left argument and y is the */
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/* right one. */
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double uremainder (double, double);
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#endif
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