glibc/sysdeps/libm-ieee754/s_roundtol.c
Ulrich Drepper 7799b7b335 Update.
1997-04-15 03:14  Ulrich Drepper  <drepper@cygnus.com>

	* wcsmbs/wcsstr.c: Add weak alias wcswcs for Unix98 compliance.

	* math/Makefile (libm-calls): Add s_sincos and s_cproj.
	* math/mathcalls.h: Add prototype for sincos.
	* sysdeps/i386/fpu/__math.h: Warn about restriction on arguments to
	inlined sin and cos function.
	Define functions new in ISO C 9X when __USE_ISOC9X is defined.
	Add optimized version of finite.
	Rewrite sincos function to handle too large arguments.
	* sysdeps/libm-i387/s_cos.S: Better code alignment.
	* sysdeps/libm-i387/s_cosl.S: Likewise.
	* sysdeps/libm-i387/s_sin.S: Likewise.
	* sysdeps/libm-i387/s_sinl.S: Likewise.
	* sysdeps/libm-i387/s_finite.S: Yet better code.
	* sysdeps/libm-i387/s_finitef.S: Likewise.
	* sysdeps/libm-i387/s_sincos.S: New file.
	* sysdeps/libm-i387/s_sincosf.S: New file.
	* sysdeps/libm-i387/s_sincosl.S: New file.
	* sysdeps/libm-ieee754/s_sincos.c: New file.
	* sysdeps/libm-ieee754/s_sincosf.c: New file.
	* sysdeps/libm-ieee754/s_sincosl.c: New file.

	* sysdeps/libm-ieee754/s_ccosh.c: Change to use sincos function.
	* sysdeps/libm-ieee754/s_ccoshf.c: Likewise.
	* sysdeps/libm-ieee754/s_ccoshl.c: Likewise.
	* sysdeps/libm-ieee754/s_cexp.c: Likewise.
	* sysdeps/libm-ieee754/s_cexpf.c: Likewise.
	* sysdeps/libm-ieee754/s_cexpl.c: Likewise.
	* sysdeps/libm-ieee754/s_csinh.c: Likewise.
	* sysdeps/libm-ieee754/s_csinhf.c: Likewise.
	* sysdeps/libm-ieee754/s_csinhl.c: Likewise.
	* sysdeps/libm-ieee754/s_ctan.c: Likewise.
	* sysdeps/libm-ieee754/s_ctanf.c: Likewise.
	* sysdeps/libm-ieee754/s_ctanl.c: Likewise.
	* sysdeps/libm-ieee754/s_ctanh.c: Likewise.
	* sysdeps/libm-ieee754/s_ctanhf.c: Likewise.
	* sysdeps/libm-ieee754/s_ctanhl.c: Likewise.

	* sysdeps/libm-ieee754/s_cosl.c: Correct check for range.
	* sysdeps/libm-ieee754/s_sinl.c: Likewise.

	* sysdeps/libm-ieee754/s_roundtol.c: Fix typos.
	* sysdeps/libm-ieee754/s_roundtoll.c: Likewise.

	* nis/Makefile (services): Mention nisplus before compat.
	* nis/nis_call.c (__do_niscall): Change type of variable server_len
	to prevent warning.
	* nis/nss_compat/compat-grp.c (getgrent_next_file_plusgroup): Add
	cast to prevent warning.
	* nis/nss_compat/compat-pwd.c (getpwent_next_file_plususer): Likewise.
	* nis/nss_compat/compat-spwd.c (getspent_next_file_plususer): Likewise.
	* nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_parse_hostent): Change
	type of variable `i' to prevent warning.
	* nis/nss_nisplus/nisplus-network.c (_nss_nisplus_parse_netent):
	Likewise.
	* nis/nss_nisplus/nisplus-proto.c (_nss_nisplus_parse_protoent):
	Likewise.
	* nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_parse_rpcent): Likewise.
	* nis/nss_nisplus/nisplus-service.c (_nss_nisplus_parse_servent):
	Likewise.

	* sysdeps/generic/Dist: Remove old math implementation files.
	* sysdeps/generic/mathimpl.h: Removed.
	* sysdeps/generic/trig.h: Removed.
	* sysdeps/generic/sincos.c: Removed.
	* sysdeps/generic/asincos.c: Removed.
	* sysdeps/generic/exp__E.c: Removed.
	* sysdeps/generic/log__L.c: Removed.

1997-04-13 17:18  Wolfram Gloger  <wmglo@dent.med.uni-muenchen.de>

	* malloc/malloc.c (fREe): Small optimization.  Before returning,
	add fast check whether the heap containing top can go away.

1997-04-11 16:46  Wolfram Gloger  <wmglo@dent.med.uni-muenchen.de>

	* malloc/malloc.c (mALLOc, rEALLOc, cALLOc, mEMALIGn): When
	failing to allocate a new chunk, also try the main_arena.  It may
	be that we are only running out of mmapped regions, and other
	arenas cannot be enlarged sufficiently.
	(new_heap, malloc_extend_top): Handle top_pad more consistently,
	i.e. only in new_heap().

1997-04-13 21:10  Philip Blundell  <pjb27@cl.cam.ac.uk>

	* sysdeps/posix/Makefile: Don't try to build and run mk-stdiolim
	if cross-compiling.

	* configure.in: Recognise "...linuxaout" OS names and turn off ELF.

	* configure.in: Add ARM support.
	* sysdeps/arm/Implies: New file.
	* sysdeps/arm/__longjmp.S: New file.
	* sysdeps/arm/bsd-_setjmp: New file.
	* sysdeps/arm/bsd-setjmp: New file.
	* sysdeps/arm/bytesex.h: New file.
	* sysdeps/arm/fpu_control.h: New file.
	* sysdeps/arm/jmp_buf.h: New file.
	* sysdeps/arm/setjmp.h: New file.
	* sysdeps/arm/sysdep.h: New file.
	* sysdeps/unix/arm/config.h: New file.

1997-04-14 04:03  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-ieee754/s_cproj.c: New file.
	* sysdeps/libm-ieee754/s_cprojf.c: New file.
	* sysdeps/libm-ieee754/s_cprojl.c: New file.
1997-04-15 01:38:39 +00:00

178 lines
4.2 KiB
C

/* Round long double value to long int.
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 <math.h>
#include "math_private.h"
#ifdef NO_LONG_DOUBLE
/* The `long double' is in fact the IEEE `double' type. */
long int
__roundtol (long double x)
{
int32_t j0;
u_int32_t i1, i0;
long int result;
EXTRACT_WORDS (i0, i1, x);
j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
if (j0 < 20)
{
if (j0 < 0)
result = j0 < -1 ? 0 : ((i0 & 0x80000000) ? -1 : 1);
else
{
u_int32_t i = 0xfffff >> j0;
if (((i0 & i) | i1) == 0)
result = (long int) ((i0 & 0xfffff) | 0x100000) >> j0;
else
{
/* X is not integral. */
u_int32_t j = i0 + (0x80000 >> j0);
if (j < i0)
result = (long int) 0x80000 >> (20 - j0);
else
result = (j | 0x100000) >> (20 - j0);
}
}
}
else if (j0 >= 8 * sizeof (long int) || j0 > 51)
{
/* The number is too large. It is left implementation defined
what happens. */
result = (long int) x;
}
else
{
u_int32_t i = ((u_int32_t) (0xffffffff)) >> (j0 - 20);
if ((i1 & i) != 0)
{
/* x is not integral. */
u_int32_t j = i1 + (0x80000000 >> (j0 - 20));
if (j < i1)
{
j = i0 + 1;
if ((j & 0xfffff) == 0)
{
if (sizeof (long int) <= 4)
/* Overflow. */
result = (long int) x;
else
result = 1l << (j0 + 1);
}
else
result = (long int) ((i0 & 0xfffff) | 0x100000) << (j0 - 31);
}
else
{
result = (long int) ((i0 & 0xfffff) | 0x100000) << (j0 - 31);
if (sizeof (long int) > 4 && j0 > 31)
result |= j >> (63 - j0);
}
}
else
{
result = (long int) ((i0 & 0xfffff) | 0x100000) << (j0 - 31);
if (sizeof (long int) > 4 && j0 > 31)
result |= i1 >> (63 - j0);
}
}
return i0 & 0x80000000 ? -result : result;
}
#else
long int
__roundtol (long double x)
{
int32_t j0;
u_int32_t se, i1, i0;
long int result;
GET_LDOUBLE_WORDS (se, i0, i1, x);
j0 = (se & 0x7fff) - 0x3fff;
if (j0 < 31)
{
if (j0 < 0)
result = j0 < -1 ? 0 : 1;
else
{
u_int32_t i = 0x7fffffff >> j0;
if (((i0 & i) | i1) == 0)
result = (long int) i0 >> j0;
else
{
/* X is not integral. */
u_int32_t j = i0 + (0x40000000 >> j0);
if (j < i0)
result = 0x80000000l >> (30 - j0);
else
result = j >> (31 - j0);
}
}
}
else if ((unsigned int) j0 >= 8 * sizeof (long int) || j0 > 62)
{
/* The number is too large. It is left implementation defined
what happens. */
result = (long int) x;
}
else
{
u_int32_t i = ((u_int32_t) (0xffffffff)) >> (j0 - 31);
if ((i1 & i) != 0)
{
/* x is not integral. */
u_int32_t j = i1 + (0x80000000 >> (j0 - 31));
if (j < i1)
{
j = i0 + 1;
if (j == 0)
{
if (sizeof (long int) <= 4)
/* Overflow. */
result = (long int) x;
else
result = 1l << (j0 + 1);
}
else
result = (long int) i0 << (j0 - 31);
}
else
{
result = (long int) i0 << (j0 - 31);
if (sizeof (long int) > 4 && j0 > 31)
result |= j >> (63 - j0);
}
}
else
{
result = (long int) i0 << (j0 - 31);
if (sizeof (long int) > 4 && j0 > 31)
result |= i1 >> (63 - j0);
}
}
return se & 0x8000 ? -result : result;
}
#endif
weak_alias (__roundtol, roundtol)