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2005-08-17 Kelley Cook <kcook@gcc.gnu.org> * All files: Update FSF address. From-SVN: r103194
82 lines
2.3 KiB
Plaintext
82 lines
2.3 KiB
Plaintext
`/* Complex trig functions
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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Libgfortran 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 General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with libgfortran; see the file COPYING. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include <math.h>
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#include "libgfortran.h"'
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include(`mtype.m4')dnl
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/* Complex number z = a + ib. */
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/* sin(z) = sin(a)cosh(b) + icos(a)sinh(b) */
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complex_type
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csin`'q (complex_type a)
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{
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real_type r;
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real_type i;
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complex_type v;
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r = REALPART (a);
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i = IMAGPART (a);
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COMPLEX_ASSIGN (v, sin`'q (r) * cosh`'q (i), cos`'q (r) * sinh`'q (i));
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return v;
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}
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/* cos(z) = cos(a)cosh(b) - isin(a)sinh(b) */
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complex_type
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ccos`'q (complex_type a)
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{
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real_type r;
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real_type i;
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complex_type v;
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r = REALPART (a);
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i = IMAGPART (a);
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COMPLEX_ASSIGN (v, cos`'q (r) * cosh`'q (i), - (sin`'q (r) * sinh`'q (i)));
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return v;
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}
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/* tan(z) = (tan(a) + itanh(b)) / (1 - itan(a)tanh(b)) */
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complex_type
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ctan`'q (complex_type a)
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{
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real_type rt;
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real_type it;
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complex_type n;
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complex_type d;
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rt = tan`'q (REALPART (a));
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it = tanh`'q (IMAGPART (a));
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COMPLEX_ASSIGN (n, rt, it);
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COMPLEX_ASSIGN (d , 1, - (rt * it));
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return n / d;
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}
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