| /* |
| * IBM Accurate Mathematical Library |
| * Written by International Business Machines Corp. |
| * Copyright (C) 2001 Free Software Foundation, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published by |
| * the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /********************************************************************/ |
| /* Ultimate math functions. Each function computes the exact */ |
| /* theoretical value of its argument rounded to nearest or even. */ |
| /* */ |
| /* Assumption: Machine arithmetic operations are performed in */ |
| /* round nearest mode of IEEE 754 standard. */ |
| /********************************************************************/ |
| |
| #ifndef UMATH_LIB |
| #define UMATH_LIB |
| /********************************************************************/ |
| /* Function changes the precision mode to IEEE 754 double precision */ |
| /* and the rounding mode to nearest or even. */ |
| /* It returns the original status of these modes. */ |
| /* See further explanations of usage in DPChange.h */ |
| /********************************************************************/ |
| unsigned short Init_Lib(void); |
| |
| /********************************************************************/ |
| /* Function that changes the precision and rounding modes to the */ |
| /* specified by the argument received. See further explanations in */ |
| /* DPChange.h */ |
| /********************************************************************/ |
| void Exit_Lib(unsigned short); |
| |
| |
| /* The asin() function calculates the arc sine of its argument. */ |
| /* The function returns the arc sine in radians */ |
| /* (between -PI/2 and PI/2). */ |
| /* If the argument is greater than 1 or less than -1 it returns */ |
| /* a NaN. */ |
| double uasin(double ); |
| |
| |
| /* The acos() function calculates the arc cosine of its argument. */ |
| /* The function returns the arc cosine in radians */ |
| /* (between -PI/2 and PI/2). */ |
| /* If the argument is greater than 1 or less than -1 it returns */ |
| /* a NaN. */ |
| double uacos(double ); |
| |
| /* The atan() function calculates the arctanget of its argument. */ |
| /* The function returns the arc tangent in radians */ |
| /* (between -PI/2 and PI/2). */ |
| double uatan(double ); |
| |
| |
| /* The uatan2() function calculates the arc tangent of the two arguments x */ |
| /* and y (x is the right argument and y is the left one).The signs of both */ |
| /* arguments are used to determine the quadrant of the result. */ |
| /* The function returns the result in radians, which is between -PI and PI */ |
| double uatan2(double ,double ); |
| |
| /* Compute log(x). The base of log is e (natural logarithm) */ |
| double ulog(double ); |
| |
| /* Compute e raised to the power of argument x. */ |
| double uexp(double ); |
| |
| /* Compute sin(x). The argument x is assumed to be given in radians.*/ |
| double usin(double ); |
| |
| /* Compute cos(x). The argument x is assumed to be given in radians.*/ |
| double ucos(double ); |
| |
| /* Compute tan(x). The argument x is assumed to be given in radians.*/ |
| double utan(double ); |
| |
| /* Compute the square root of non-negative argument x. */ |
| /* If x is negative the returned value is NaN. */ |
| double usqrt(double ); |
| |
| /* Compute x raised to the power of y, where x is the left argument */ |
| /* and y is the right argument. The function returns a NaN if x<0. */ |
| /* If x equals zero it returns -inf */ |
| double upow(double , double ); |
| |
| /* Computing x mod y, where x is the left argument and y is the */ |
| /* right one. */ |
| double uremainder(double , double ); |
| |
| |
| #endif |
