3fe4dc4156
1999-07-15 Jakub Jelinek <jj@ultra.linux.cz> * math/Makefile: Add t_sincosl and k_sincosl support routines. * math/math_private.h (__kernel_sincosl): New declaration. * sysdeps/generic/t_sincosl.c: New file. * sysdeps/generic/k_sincosl.c: New file. * sysdeps/ieee754/ldbl-128/k_cosl.c: New file. * sysdeps/ieee754/ldbl-128/k_sinl.c: New file. * sysdeps/ieee754/ldbl-128/k_sincosl.c: New file. * sysdeps/ieee754/ldbl-128/t_sincosl.c: New file. * sysdeps/ieee754/ldbl-128/e_rem_pio2l.c: New file. * sysdeps/ieee754/ldbl-128/s_sincosl.c (__sincosl): Use __kernel_sincosl. * sysdeps/ieee754/ldbl-128/math_ldbl.h (GET_LDOUBLE_LSW64): New definition.
72 lines
2 KiB
C
72 lines
2 KiB
C
/* Compute sine and cosine of argument.
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Copyright (C) 1997, 1999 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 and
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Jakub Jelinek <jj@ultra.linux.cz>.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <math.h>
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#include "math_private.h"
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void
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__sincosl (long double x, long double *sinx, long double *cosx)
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{
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int64_t ix;
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/* High word of x. */
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GET_LDOUBLE_MSW64 (ix, x);
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/* |x| ~< pi/4 */
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ix &= 0x7fffffffffffffffLL;
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if (ix <= 0x3ffe921fb54442d1LL)
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__kernel_sincosl (x, 0.0L, sinx, cosx, 0);
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else if (ix >= 0x7fff000000000000LL)
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{
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/* sin(Inf or NaN) is NaN */
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*sinx = *cosx = x - x;
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}
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else
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{
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/* Argument reduction needed. */
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long double y[2];
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int n;
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n = __ieee754_rem_pio2l (x, y);
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switch (n & 3)
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{
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case 0:
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__kernel_sincosl (y[0], y[1], sinx, cosx, 1);
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break;
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case 1:
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__kernel_sincosl (y[0], y[1], cosx, sinx, 1);
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*cosx = -*cosx;
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break;
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case 2:
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__kernel_sincosl (y[0], y[1], sinx, cosx, 1);
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*sinx = -*sinx;
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*cosx = -*cosx;
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break;
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default:
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__kernel_sincosl (y[0], y[1], cosx, sinx, 1);
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*sinx = -*sinx;
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break;
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}
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}
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}
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weak_alias (__sincosl, sincosl)
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