glibc/math/multc3.c

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* math/divtc3.c: New file. * math/multc3.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/Makefile [$(subdir) = math] (libm-routines): Add multc3, divtc3. * sysdeps/unix/sysv/linux/sparc/sparc32/fpu/Implies: New file. * sysdeps/sparc/sparc32/fpu/s_fabsl.c: Include math.h and math_ldbl_opt.h. (fabsl): Use long_double_symbol instead of weak_alias. * sysdeps/sparc/sparc32/fpu/s_fabs.c: Include math.h and math_ldbl_opt.h. [LONG_DOUBLE_COMPAT] (fabsl): Add compat_symbol. 2006-01-31 Martin Schwidefsky <schwidefsky@de.ibm.com> Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/s390/Implies: New file. * sysdeps/unix/sysv/linux/s390/fpu/Implies: New file. * sysdeps/unix/sysv/linux/s390/nldbl-abi.h: New file. * sysdeps/s390/fpu/bits/mathinline.h (signbitl, sqrtl): New inlines. * sysdeps/s390/bits/mathdef.h: New file. * sysdeps/s390/fpu/e_sqrtl.c: New file. * sysdeps/s390/s390-32/bits/wordsize.h (__LONG_DOUBLE_MATH_OPTIONAL, __NO_LONG_DOUBLE_MATH): Define. * sysdeps/s390/s390-64/bits/wordsize.h: Likewise. * sysdeps/s390/Implies: Add ieee754/ldbl-128. * sysdeps/s390/ldbl2mpn.c: File removed. * sysdeps/s390/fpu/libm-test-ulps: Updated. 2006-01-31 Roland McGrath <roland@redhat.com> * sysdeps/alpha/fpu/bits/mathdef.h: Moved to ... * sysdeps/alpha/bits/mathdef.h: ... here. * sysdeps/i386/fpu/bits/mathdef.h: Moved to ... * sysdeps/i386/bits/mathdef.h: ... here. * sysdeps/mips/fpu/bits/mathdef.h: Moved to ... * sysdeps/mips/bits/mathdef.h: ... here. * sysdeps/m68k/fpu/bits/mathdef.h: Moved to ... * sysdeps/m68k/bits/mathdef.h: ... here. * sysdeps/powerpc/fpu/bits/mathdef.h: Moved to ... * sysdeps/powerpc/bits/mathdef.h: ... here. * sysdeps/sparc/fpu/bits/mathdef.h: Moved to ... * sysdeps/sparc/bits/mathdef.h: ... here. * sysdeps/ia64/fpu/bits/mathdef.h: Moved to ... * sysdeps/ia64/bits/mathdef.h: ... here. * sysdeps/sh/sh4/fpu/bits/mathdef.h: Moved to ... * sysdeps/sh/sh4/bits/mathdef.h: ... here. * sysdeps/x86_64/fpu/bits/mathdef.h: Moved to ... * sysdeps/x86_64/bits/mathdef.h: ... here. 2006-01-31 Jakub Jelinek <jakub@redhat.com>
2006-02-01 04:02:06 +01:00
/* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@redhat.com>, 2005.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdbool.h>
#include <math.h>
#include <complex.h>
attribute_hidden
long double _Complex
__multc3 (long double a, long double b, long double c, long double d)
{
long double ac, bd, ad, bc, x, y;
ac = a * c;
bd = b * d;
ad = a * d;
bc = b * c;
x = ac - bd;
y = ad + bc;
if (isnan (x) && isnan (y))
{
/* Recover infinities that computed as NaN + iNaN. */
bool recalc = 0;
if (isinf (a) || isinf (b))
{
/* z is infinite. "Box" the infinity and change NaNs in
the other factor to 0. */
a = __copysignl (isinf (a) ? 1 : 0, a);
b = __copysignl (isinf (b) ? 1 : 0, b);
if (isnan (c)) c = __copysignl (0, c);
if (isnan (d)) d = __copysignl (0, d);
recalc = 1;
}
if (isinf (c) || isinf (d))
{
/* w is infinite. "Box" the infinity and change NaNs in
the other factor to 0. */
c = __copysignl (isinf (c) ? 1 : 0, c);
d = __copysignl (isinf (d) ? 1 : 0, d);
if (isnan (a)) a = __copysignl (0, a);
if (isnan (b)) b = __copysignl (0, b);
recalc = 1;
}
if (!recalc
&& (isinf (ac) || isinf (bd) || isinf (ad) || isinf (bc)))
{
/* Recover infinities from overflow by changing NaNs to 0. */
if (isnan (a)) a = __copysignl (0, a);
if (isnan (b)) b = __copysignl (0, b);
if (isnan (c)) c = __copysignl (0, c);
if (isnan (d)) d = __copysignl (0, d);
recalc = 1;
}
if (recalc)
{
x = INFINITY * (a * c - b * d);
y = INFINITY * (a * d + b * c);
}
}
return x + I * y;
}