glibc/sysdeps/libm-ieee754/s_rinttol.c

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Update. 1997-04-09 01:24 Ulrich Drepper <drepper@cygnus.com> * rellns-sh: Rewrite to work also in presence of symlinks. * arpg/argp-fmtstream.c: Add casts to prevent warnings. * argp/argp-fmtstream.h: Likewise. * argp/argp-help.c: Likewise. * elf/dl-minimal.c: Add definition of calloc. * elf/version.c: Add casts to prevent warnings. (_dl_check_map_versions): Use calloc instead of malloc+memset. * locale/setlocale.c (_nl_current): Add element with index LC_ALL. Reported by Greg McGary <gkm@eng.ascend.com>. * manual/libc.texinfo: Update malloc documentation for new malloc. * manual/memory.texi: Likewise. Patch by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>. * math/libm-test.c (check_long): New function. (check_longlong): New function. (rinttol_test): New function. (rinttoll_test): New function. * nis/nss_compat/compat-grp.c (in_blacklist): Improve a bit. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * stdlib/erand48_r.c (erand48_r): Build double value using ieee754_double union and use random bits in different order to increase effect of seed. Reported by David Mosberger-Tang <davidm@AZStarNet.com>. * sunrpc/svc_auth.c: Moved to ... * sysdeps/generic/svc_auth.c: ...here. * time/time.h: Pretty print. 1997-04-08 07:19 H.J. Lu <hjl@gnu.ai.mit.edu> * libio/genops.c (_IO_flush_all_linebuffered): don't flush on a read-only stream. 1997-04-09 01:19 Ulrich Drepper <drepper@cygnus.com> * malloc/malloc.c (mALLOC_STATs) [MALLOC_DEBUG>1]: Put declaration in correct place. Patch by Marcus G. Daniels <marcus@cathcart.sysc.pdx.edu>. 1997-04-07 15:34 Ulrich Drepper <drepper@cygnus.com> * stdio-common/Makefile (tests): Add tst-ferror. * stdio-common/tst-ferror.c: New file. Some tests for error indicator of streams. * stdio-common/tst-ferror.input: New file. * isomac.c: Let tests not fail because the compiler defines itself symbols which violate the name space rules. gcc defines symbols for the architecture which are not protected by an underscore character. * math/Makefile (libm-support): Add s_rinttol and s_rinttoll. (libm-calls): Add s_clog. * sysdeps/libm-ieee754/s_clog.c: New file. Implementation of logarithm of complex value. * sysdeps/libm-ieee754/s_clogf.c: New file. * sysdeps/libm-ieee754/s_clogl.c: New file. * math/libm-test.c (clog_test): Compile this function. Fix a few typos. (main): Call clog_test. * sysdeps/libm-ieee754/s_rinttol.c: New file. Round long double value to long int. * sysdeps/libm-i387/s_rinttol.S: New file. * sysdeps/libm-ieee754/s_rinttoll.c: new file. Round long double value to long long int. * sysdeps/libm-i387/s_rinttoll.S: New file. * sysdeps/libm-ieee754/s_rintl.c: Many corrections. The previous version was full of errors. * math/math.h (rinttol): Argument is of type `long double' not `double'. (rinttoll): Likewise. (roundtol): Likewise. (roundtoll): Likewise. 1997-04-06 11:32 H.J. Lu <hjl@gnu.ai.mit.edu> * posix/getopt.c (_getopt_initialize): Preserve optind. (_getopt_internal): Set optind to 1 if optind == 0 before calling _getopt_initialize (). 1997-04-05 16:45 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/rpcsvc/nislib.h: Change const nis_name to new type const_nis_name. * nis/nis_intern.c: Likewise. * nis/nis_intern.h: Likewise. * nis/nis_server.c: Likewise. * nis/nis_subr.c: Likewise. * nis/nis_table.c: Likewise. * nis/nis_names.c: Likewise. Fill out ns_request structure in nis_add(). * nis/nss_compat/compat-pwd.c: Use reentrant netgroup functions. * nis/nss_compat/compat-spwd.c: Likewise. 1997-03-27 07:37 H.J. Lu <hjl@gnu.ai.mit.edu> * libio/fileops.c (_IO_file_overflow): Set error when try to write on a read-only stream. * sysdeps/gnu/utmpbits.h (ut_xtime): New symbol. (ut_time): Define it only if _NO_UT_TIME is not defined. 1997-04-06 00:42 Ulrich Drepper <drepper@cygnus.com> * misc/tst-tsearch.c: Include <string.h>. Define _GNU_SOURCE only if not already defined. 1997-04-05 16:14 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/netatalk/at.h: Include <sys/socket.h> to get definition of sa_family_t for <linux/atalk.h>. Reported by a sun <asun@zoology.washington.edu>. * malloc/malloc.c (cALLOc): Little optimization.
1997-04-08 23:42:08 +00:00
/* Round argument to nearest integral value according to current rounding
direction.
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. */
static long double two52[2] =
{
4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
-4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
};
long int
__rinttol (long double x)
{
int32_t j0,sx;
u_int32_t i0,i1,i;
long double t, w;
long int result;
EXTRACT_WORDS (i0, i1, x);
sx = i0 >> 31;
j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
if (j0 < 20)
{
if (j0 < 0)
{
if (((i0 & 0x7fffffff) | i1) == 0)
/* The number is 0. */
result = 0;
else
{
i1 |= i0;
i0 &= 0xfffe0000;
i0 |= ((i1 | -i1) >> 12) & 0x80000;
SET_HIGH_WORD (x, i0);
w = two52[sx] + x;
t = w - two52[sx];
GET_HIGH_WORD (i0, t);
if ((i0 & 0x7fffffff) >= 0x3fff0000)
result = sx ? -1 : 1;
else
result = 0;
}
}
else
{
u_int32_t i = 0x000fffff >> j0;
if (((i0 & i) | i1) == 0)
{
/* X is not integral. */
i >>= 1;
if (((i0 & i) | i1) != 0)
{
if (j0 == 19)
i1 = 0x40000000;
else
i0 = (i0 & (~i)) | (0x20000 >> j0);
INSERT_WORDS (x, i0, i1);
w = two52[sx] + x;
x = w - two52[sx];
EXTRACT_WORDS (i0, i1, x);
j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
}
}
result = ((i0 >> (20 - j0)) & 0xfffff) | (0x00100000 >> (20 - j0));
if (sx)
result = -result;
}
}
else if ((unsigned int) j0 < sizeof (long int) * 8 && j0 < 53)
{
i = ((u_int32_t) (0xffffffff)) >> (j0 - 20);
if ((i1 & i) != 0)
{
/* x is not integral. */
i >>= 1;
if ((i1 & i) != 0)
i1 = (i1 & (~i)) | (0x40000000 >> (j0 - 20));
}
INSERT_WORDS (x, i0, i1);
w = two52[sx] + x;
x = w - two52[sx];
EXTRACT_WORDS (i0, i1, x);
j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
result = i0 | 0x00100000;
if (j0 > 20)
{
result <<= j0 - 20;
result |= i1 >> (52 - j0);
}
if (sx)
result = -result;
}
else
/* Too large. The number is either +-inf or NaN or it is too
large to be effected by rounding. The standard leaves it
undefined what to return when the number is too large to fit in
a `long int'. */
result = (long int) x;
return result;
}
#else
static long double two63[2] =
{
9.223372036854775808000000e+18, /* 0x403E, 0x00000000, 0x00000000 */
-9.223372036854775808000000e+18 /* 0xC03E, 0x00000000, 0x00000000 */
};
long int
__rinttol (long double x)
{
int32_t se,j0,sx;
u_int32_t i0,i1,i;
long int result;
long double w, t;
GET_LDOUBLE_WORDS (se, i0, i1, x);
sx = (se >> 15) & 1;
j0 = (se & 0x7fff) - 0x3fff;
if (j0 < 31)
{
if (j0 < 0)
{
if (((se & 0x7fff) | i0 | i1) == 0)
/* The number is 0. */
result = 0;
else
{
i1 |= i0;
i0 &= 0xe0000000;
i0 |= (i1 | -i1) & 0x80000000;
SET_LDOUBLE_MSW (x, i0);
w = two63[sx] + x;
t = w - two63[sx];
GET_LDOUBLE_EXP (i0, t);
if ((i0 & 0x7fff) >= 0x3fff)
result = sx ? -1 : 1;
else
result = 0;
}
}
else
{
u_int32_t i = 0x7fffffff >> j0;
if (((i0 & i) | i1) == 0)
{
/* X is not integral. */
i >>= 1;
if (((i0 & i) | i1) != 0)
{
if (j0 == 31)
i1 = 0x40000000;
else
i0 = (i0 & (~i)) | (0x20000000 >> j0);
SET_LDOUBLE_WORDS (x, se, i0, i1);
w = two63[sx] + x;
x = w - two63[sx];
GET_LDOUBLE_WORDS (se, i0, i1, x);
sx = (se >> 15) & 1;
j0 = (se & 0x7fff) - 0x3fff;
}
}
result = i0 >> (31 - j0);
}
}
else if ((unsigned int) j0 < sizeof (long int) * 8 && j0 < 64)
{
i = ((u_int32_t) (0xffffffff)) >> (j0 - 31);
if ((i1 & i) != 0)
{
/* x is not integral. */
i >>= 1;
if ((i1 & i) != 0)
i1 = (i1 & (~i)) | (0x40000000 >> (j0 - 31));
}
SET_LDOUBLE_WORDS (x, se, i0, i1);
w = two63[sx] + x;
x = w - two63[sx];
GET_LDOUBLE_WORDS (se, i0, i1, x);
j0 = (se & 0x7fff) - 0x3fff;
result = i0;
if (j0 > 31)
{
result <<= j0 - 31;
result |= i1 >> (63 - j0);
}
}
else
/* Too large. The number is either +-inf or NaN or it is too
large to be effected by rounding. The standard leaves it
undefined what to return when the number is too large to fit in
a `long int'. */
result = (long int) x;
return result;
}
#endif
weak_alias (__rinttol, rinttol)