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16f0ecedb5
for __sincosl_table. * sysdeps/ieee754/ldbl-128ibm/k_sincosl.c (__kernel_sincosl): Likewise. * sysdeps/ieee754/ldbl-128ibm/k_sinl.c (__kernel_sinl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_ceill.c: Correct sign of 0.0. * sysdeps/ieee754/ldbl-128ibm/s_floorl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_cprojl.c: New file. * sysdeps/ieee754/ldbl-128ibm/s_ctanhl.c: New file. * sysdeps/ieee754/ldbl-128ibm/s_ctanl.c: New file.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Compute projection of complex long double value to Riemann sphere.
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Copyright (C) 1997,1999,2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <complex.h>
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#include <math.h>
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#include <math_ldbl_opt.h>
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__complex__ long double
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__cprojl (__complex__ long double x)
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{
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__complex__ long double res;
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if (isnan (__real__ x) && isnan (__imag__ x))
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return x;
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else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
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{
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__real__ res = INFINITY;
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__imag__ res = __copysignl (0.0, __imag__ x);
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}
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else
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{
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long double den = (__real__ x * __real__ x + __imag__ x * __imag__ x
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+ 1.0);
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__real__ res = (2.0 * __real__ x) / den;
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__imag__ res = (2.0 * __imag__ x) / den;
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/* __gcc_qmul does not respect -0.0 so we need the following fixup. */
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if (__real__ x == 0.0)
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__real__ res = __real__ x;
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if (__imag__ x == 0.0)
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__imag__ res = __imag__ x;
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}
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return res;
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}
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long_double_symbol (libm, __cprojl, cprojl);
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