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author | Ulrich Drepper <drepper@redhat.com> | 1997-03-25 02:25:35 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1997-03-25 02:25:35 +0000 |
commit | 34b402e5a967b97fc73cc45fbef61bbeb8526f3d (patch) | |
tree | 73a03f61ce0cdcc0127d3cd7402597ebc8364570 /sysdeps/libm-ieee754/s_cexp.c | |
parent | 4e1101a7dabfc438f32ef0ba0ab4f6a936ec38d6 (diff) | |
download | glibc-34b402e5a967b97fc73cc45fbef61bbeb8526f3d.tar.gz glibc-34b402e5a967b97fc73cc45fbef61bbeb8526f3d.tar.xz glibc-34b402e5a967b97fc73cc45fbef61bbeb8526f3d.zip |
Update. cvs/libc-ud-970324-2
1997-03-24 19:58 Richard Henderson <rth@tamu.edu> * stdlib/tst-strtol.c (tests): Correct 64-bit entry. * sysdeps/alpha/bsd-_setjmp.S: Alias _setjmp to __setjmp for change to tst-setjmp.c. * sysdeps/alpha/dl-machine.h: Mirror Roland's recent changes. * sysdeps/i386/dl-machine.h: Correct noexec_p comment. * sysdeps/sparc/dl-machine.h: Likewise. * sysdeps/libm-ieee754/s_remquo.c: Rename {hp,lp} -> {hy,ly}. Add missing qs variable. * sysdeps/libm-ieee754/s_remquof.c: Likewise.
Diffstat (limited to 'sysdeps/libm-ieee754/s_cexp.c')
-rw-r--r-- | sysdeps/libm-ieee754/s_cexp.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_cexp.c b/sysdeps/libm-ieee754/s_cexp.c new file mode 100644 index 0000000000..46f9f612eb --- /dev/null +++ b/sysdeps/libm-ieee754/s_cexp.c @@ -0,0 +1,63 @@ +/* Return value of complex exponential function for double complex value. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <complex.h> +#include <math.h> + + +__complex__ double +__cexp (__complex__ double x) +{ + __complex__ double retval; + + if (isfinite (__real__ x)) + { + if (isfinite (__imag__ x)) + { + retval = __exp (__real__ x) * (__cos (__imag__ x) + + 1i * __sin (__imag__ x)); + } + else + /* If the imaginary part is +-inf or NaN and the real part is + not +-inf the result is NaN + iNan. */ + retval = __nan ("") + 1.0i * __nan (""); + } + else if (__isinf (__real__ x)) + { + if (isfinite (__imag x)) + { + if (signbit (__real__ x) == 0 && __imag__ x == 0.0) + retval = HUGE_VAL; + else + retval = ((signbit (__real__ x) ? 0.0 : HUGE_VAL) + * (__cos (__imag__ x) + 1i * __sin (__imag__ x))); + } + else if (signbit (__real__ x)) + retval = HUGE_VAL + 1.0i * __nan (""); + else + retval = 0.0; + } + else + /* If the real part is NaN the result is NaN + iNan. */ + retval = __nan ("") + 1.0i * __nan (""); + + return retval; +} +weak_alias (__cexp, cexp) |