"Fossies" - the Fresh Open Source Software Archive

Member "mapm_4.9.5a/mapmhsin.c" (21 Feb 2010, 3136 Bytes) of package /linux/misc/old/mapm-4.9.5a.tar.gz:

    1 
    2 /* 
    3  *  M_APM  -  mapmhsin.c
    4  *
    5  *  Copyright (C) 2000 - 2007   Michael C. Ring
    6  *
    7  *  Permission to use, copy, and distribute this software and its
    8  *  documentation for any purpose with or without fee is hereby granted,
    9  *  provided that the above copyright notice appear in all copies and
   10  *  that both that copyright notice and this permission notice appear
   11  *  in supporting documentation.
   12  *
   13  *  Permission to modify the software is granted. Permission to distribute
   14  *  the modified code is granted. Modifications are to be distributed by
   15  *  using the file 'license.txt' as a template to modify the file header.
   16  *  'license.txt' is available in the official MAPM distribution.
   17  *
   18  *  This software is provided "as is" without express or implied warranty.
   19  */
   20 
   21 /*
   22  *      $Id: mapmhsin.c,v 1.4 2007/12/03 01:54:06 mike Exp $
   23  *
   24  *      This file contains the Hyperbolic SIN, COS, & TAN functions.
   25  *
   26  *      $Log: mapmhsin.c,v $
   27  *      Revision 1.4  2007/12/03 01:54:06  mike
   28  *      Update license
   29  *
   30  *      Revision 1.3  2002/11/03 21:29:20  mike
   31  *      Updated function parameters to use the modern style
   32  *
   33  *      Revision 1.2  2000/09/23 19:52:56  mike
   34  *      change divide call to reciprocal
   35  *
   36  *      Revision 1.1  2000/04/03 18:16:26  mike
   37  *      Initial revision
   38  */
   39 
   40 #include "m_apm_lc.h"
   41 
   42 /****************************************************************************/
   43 /*
   44  *      sinh(x) == 0.5 * [ exp(x) - exp(-x) ]
   45  */
   46 void    m_apm_sinh(M_APM rr, int places, M_APM aa)
   47 {
   48 M_APM   tmp1, tmp2, tmp3;
   49 int     local_precision;
   50 
   51 tmp1 = M_get_stack_var();
   52 tmp2 = M_get_stack_var();
   53 tmp3 = M_get_stack_var();
   54 
   55 local_precision = places + 4;
   56 
   57 m_apm_exp(tmp1, local_precision, aa);
   58 m_apm_reciprocal(tmp2, local_precision, tmp1);
   59 m_apm_subtract(tmp3, tmp1, tmp2);
   60 m_apm_multiply(tmp1, tmp3, MM_0_5);
   61 m_apm_round(rr, places, tmp1);
   62 
   63 M_restore_stack(3);
   64 }
   65 /****************************************************************************/
   66 /*
   67  *      cosh(x) == 0.5 * [ exp(x) + exp(-x) ]
   68  */
   69 void    m_apm_cosh(M_APM rr, int places, M_APM aa)
   70 {
   71 M_APM   tmp1, tmp2, tmp3;
   72 int     local_precision;
   73 
   74 tmp1 = M_get_stack_var();
   75 tmp2 = M_get_stack_var();
   76 tmp3 = M_get_stack_var();
   77 
   78 local_precision = places + 4;
   79 
   80 m_apm_exp(tmp1, local_precision, aa);
   81 m_apm_reciprocal(tmp2, local_precision, tmp1);
   82 m_apm_add(tmp3, tmp1, tmp2);
   83 m_apm_multiply(tmp1, tmp3, MM_0_5);
   84 m_apm_round(rr, places, tmp1);
   85 
   86 M_restore_stack(3);
   87 }
   88 /****************************************************************************/
   89 /*
   90  *      tanh(x) == [ exp(x) - exp(-x) ]  /  [ exp(x) + exp(-x) ]
   91  */
   92 void    m_apm_tanh(M_APM rr, int places, M_APM aa)
   93 {
   94 M_APM   tmp1, tmp2, tmp3, tmp4;
   95 int     local_precision;
   96 
   97 tmp1 = M_get_stack_var();
   98 tmp2 = M_get_stack_var();
   99 tmp3 = M_get_stack_var();
  100 tmp4 = M_get_stack_var();
  101 
  102 local_precision = places + 4;
  103 
  104 m_apm_exp(tmp1, local_precision, aa);
  105 m_apm_reciprocal(tmp2, local_precision, tmp1);
  106 m_apm_subtract(tmp3, tmp1, tmp2);
  107 m_apm_add(tmp4, tmp1, tmp2);
  108 m_apm_divide(tmp1, local_precision, tmp3, tmp4);
  109 m_apm_round(rr, places, tmp1);
  110 
  111 M_restore_stack(4);
  112 }
  113 /****************************************************************************/