glibc/sysdeps/powerpc/fpu/w_sqrt.c

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Update. 1997-08-29 02:36 Ulrich Drepper <drepper@cygnus.com> * Makefile (version-info.h): Use ISO form for the date. * catgets/catgetsinfo.h: Include <bits/libc-lock.h>. (struct catalog_obj): Add lock field. (__open_catalog): Remove second parameter from prototype. * catgets/catgets.c (catopen): Initialize lock field. (catgets): Don't pass second parameter to __open_catalog. * catgets/gencat.c: Initialize lock field and don't pass second parameter to __open_catalog. * catgets/open_catalog.c (__open_catalog): Decide about use of path by examining path in struct, not based on extra argument. Acquire a the lock before trying to load the catalog and release it before returning. * csu/Makefile (abi-tag.h): Make sure target directory exists. * io/Makefile (headers): Add bits/poll.h. * io/sys/poll.h: Remove definitions of POLL* constants. Include <bits/poll.h>. * sysdeps/generic/bits/poll.h: New file. * sysdeps/unix/sysv/linux/bits/poll.h: New file. * sysdeps/unix/sysv/linux/m68k/bits/poll.h: New file. * sysdeps/unix/sysv/linux/mips/bits/poll.h: New file. * sysdeps/unix/sysv/linux/sparc/bits/poll.h: New file. * libio/fileops.c (_IO_file_read, _IO_file_write): Remove dead code. * malloc/obstack.c: Add casts to keep very verbose compilers on 64bit machine quiet. * nss/Makefile (libnss_db.so): Find libdb.so in db2 directory. 1997-08-28 17:30 Ulrich Drepper <drepper@cygnus.com> * catgets/catgets.c (catopen): Correctly determine length of string in NLSPATH evironment variable. Patch by HJ Lu <hjl@gnu.ai.mit.edu>. 1997-08-27 23:19 Richard Henderson <rth@cygnus.com> * sysdeps/generic/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): Provide default macro to track down arguments from stack start. (_dl_sysdep_start): Use it. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Truncate to simply providing a special DL_FIND_ARG_COMPONENTS and including the next file up the line. * sysdeps/powerpc/e_sqrt.c: Move contents to w_sqrt.c and provide stub. * sysdeps/powerpc/e_sqrtf.c: Likewise. * sysdeps/powerpc/s_copysignf.S: Provide empty file; symbol is with the double precision version. * sysdeps/powerpc/s_fabsf.S: Likewise. * sysdeps/powerpc/s_isnanf.S: Likewise.
1997-08-29 01:19:12 +00:00
/* Single-precision floating point square root.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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>
#include <fenv_libc.h>
#include <inttypes.h>
static const double almost_half = 0.5000000000000001; /* 0.5 + 2^-53 */
static const uint32_t a_nan = 0x7fc00000;
static const uint32_t a_inf = 0x7f800000;
static const float two108 = 3.245185536584267269e+32;
static const float twom54 = 5.551115123125782702e-17;
extern const float __t_sqrt[1024];
/* The method is based on a description in
Computation of elementary functions on the IBM RISC System/6000 processor,
P. W. Markstein, IBM J. Res. Develop, 34(1) 1990.
Basically, it consists of two interleaved Newton-Rhapson approximations,
one to find the actual square root, and one to find its reciprocal
without the expense of a division operation. The tricky bit here
is the use of the POWER/PowerPC multiply-add operation to get the
required accuracy with high speed.
The argument reduction works by a combination of table lookup to
obtain the initial guesses, and some careful modification of the
generated guesses (which mostly runs on the integer unit, while the
Newton-Rhapson is running on the FPU). */
double
__sqrt(double x)
{
const float inf = *(const float *)&a_inf;
/* x = f_wash(x); *//* This ensures only one exception for SNaN. */
if (x > 0)
{
if (x != inf)
{
/* Variables named starting with 's' exist in the
argument-reduced space, so that 2 > sx >= 0.5,
1.41... > sg >= 0.70.., 0.70.. >= sy > 0.35... .
Variables named ending with 'i' are integer versions of
floating-point values. */
double sx; /* The value of which we're trying to find the
square root. */
double sg,g; /* Guess of the square root of x. */
double sd,d; /* Difference between the square of the guess and x. */
double sy; /* Estimate of 1/2g (overestimated by 1ulp). */
double sy2; /* 2*sy */
double e; /* Difference between y*g and 1/2 (se = e * fsy). */
double shx; /* == sx * fsg */
double fsg; /* sg*fsg == g. */
fenv_t fe; /* Saved floating-point environment (stores rounding
mode and whether the inexact exception is
enabled). */
uint32_t xi0, xi1, sxi, fsgi;
const float *t_sqrt;
fe = fegetenv_register();
EXTRACT_WORDS (xi0,xi1,x);
relax_fenv_state();
Update. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * iconvdata/Makefile: Use rpath $ORIGIN for modules which use any of the conversion libraries. * include/features.h: Mention latest extensions in _POSIX_C_SOURCE description. * libio/genops.c (list_all_lock): New variable. (_IO_un_link, _IO_link_in): Acquire lock before modifying _IO_list_all. [PR libc/911]. * sysdeps/i386/i686/strtok.s: Add missing cld. * sysdeps/i386/i686/mempcpy.S: New file. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> Suppress parentheses warnings: * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): here, * sysdeps/powerpc/dl-machine.c: here, * sysdeps/powerpc/fclrexcpt.c (feclearexcept): here, * sysdeps/powerpc/fesetround.c (fesetround): here, * sysdeps/powerpc/feupdateenv.c (feupdateenv): here, * sysdeps/powerpc/fraiseexcpt.c (feraiseexcept): here, * sysdeps/powerpc/fsetexcptflg.c (fesetexceptflag): here, * sysdeps/powerpc/s_rint.c (__rint): here, * sysdeps/powerpc/s_rintf.c (__rintf): here, * sysdeps/powerpc/w_sqrt.c (__sqrt): here, * sysdeps/powerpc/w_sqrtf.c (__sqrtf): and here. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * wcsmbs/wcstold.c [__NO_LONG_DOUBLE_MATH]: Include wchar.h. * wcsmbs/wcstold_l.c [__NO_LONG_DOUBLE_MATH]: Likewise. Also define appropropriate prototypes, correct procedure names. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/generic/crypt-entry.c: Prototype __crypt_r, suppress warning. (__crypt_r): Add __restrict. * sysdeps/generic/crypt.h: Remove internal routine. Add __restrict. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * stdlib/longlong.h: Add missing #else in SPARC definitions. 1998-12-30 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org>: * sysdeps/unix/sysv/linux/mips/sgidefs.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/asm.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/Makefile: Remove delete files. * sysdeps/unix/sysv/linux/mips/Dist: Remove deleted files. * sysdeps/mips/sys/fpregdef.h: New files, enhanced versions of deleted linux specific files. * sysdeps/mips/sys/asm.h: Likewise. * sysdeps/mips/sgidefs.h: Likewise. * sysdeps/mips/fpregdef.h: Likewise. * sysdeps/mips/regdef.h: Likewise. * sysdeps/mips/Makefile: Add new headers. * sysdeps/mips/Dist: Add new files. * sysdeps/mips/fpu_control.h (_FPU_DEFAULT): Change value. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * iconvdata/Makefile: Remove variable assignments and rules that are now auto-generated. Include $(objpfx)iconv-rules instead. Btw, that removes a few typos. (charmaps): New variable. ($(objpfx)iconv-rules): New target. (gen-8bit-modules): Renamed from sed-generated-headers, remove .h suffixes. (gen-8bit-gap-modules): Renamed from awk-generated-headers, remove .h suffixes. (gen-special-modules): New variable. (generated-modules): New variable. (headers): Use it. (before-compile): Likewise. (generated): Likewise, and add iconv-rules. * iconvdata/euc-cn.c: Renamed from euccn.c. * iconvdata/euc-jp.c: Renamed from eucjp.c. * iconvdata/euc-kr.c: Renamed from euckr.c. * iconvdata/euc-tw.c: Renamed from euctw.c. * iconvdata/iso_6937.c: Renamed from iso6937.c. * iconvdata/iso_6937-2.c: Renamed from iso6937-2.c. * iconvdata/t.61.c: Renamed from t61.c. * iconvdata/Makefile (distribute): Adjusted for those renames. Remove $(objpfx) from names. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * sysdeps/generic/hp-timing.h: Fix comment. * sysdeps/generic/dl-hash.h: Likewise. * sysdeps/i386/i686/hp-timing.h: Likewise. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * posix/fnmatch.c (fnmatch): Always pass unsigned char values to FOLD macro. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * nss/db-Makefile ($(VAR_DB)/shadow.db): Fix last change. 1998-12-29 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Sync with current Linux 2.1.132 kernel sources. 1998-12-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org> for Linux/MIPS: * sysdeps/unix/sysv/linux/mips/syscalls.list: Add ipc, change pread/pwrite and llseek calls. * sysdeps/unix/sysv/linux/mips/sysdep.S: New file. 1998-12-29 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> * malloc/thread-m.h [_LIBC] : Fix for NO_THREADS case.
1998-12-31 18:19:19 +00:00
sxi = (xi0 & 0x3fffffff) | 0x3fe00000;
Update. 1997-08-29 02:36 Ulrich Drepper <drepper@cygnus.com> * Makefile (version-info.h): Use ISO form for the date. * catgets/catgetsinfo.h: Include <bits/libc-lock.h>. (struct catalog_obj): Add lock field. (__open_catalog): Remove second parameter from prototype. * catgets/catgets.c (catopen): Initialize lock field. (catgets): Don't pass second parameter to __open_catalog. * catgets/gencat.c: Initialize lock field and don't pass second parameter to __open_catalog. * catgets/open_catalog.c (__open_catalog): Decide about use of path by examining path in struct, not based on extra argument. Acquire a the lock before trying to load the catalog and release it before returning. * csu/Makefile (abi-tag.h): Make sure target directory exists. * io/Makefile (headers): Add bits/poll.h. * io/sys/poll.h: Remove definitions of POLL* constants. Include <bits/poll.h>. * sysdeps/generic/bits/poll.h: New file. * sysdeps/unix/sysv/linux/bits/poll.h: New file. * sysdeps/unix/sysv/linux/m68k/bits/poll.h: New file. * sysdeps/unix/sysv/linux/mips/bits/poll.h: New file. * sysdeps/unix/sysv/linux/sparc/bits/poll.h: New file. * libio/fileops.c (_IO_file_read, _IO_file_write): Remove dead code. * malloc/obstack.c: Add casts to keep very verbose compilers on 64bit machine quiet. * nss/Makefile (libnss_db.so): Find libdb.so in db2 directory. 1997-08-28 17:30 Ulrich Drepper <drepper@cygnus.com> * catgets/catgets.c (catopen): Correctly determine length of string in NLSPATH evironment variable. Patch by HJ Lu <hjl@gnu.ai.mit.edu>. 1997-08-27 23:19 Richard Henderson <rth@cygnus.com> * sysdeps/generic/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): Provide default macro to track down arguments from stack start. (_dl_sysdep_start): Use it. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Truncate to simply providing a special DL_FIND_ARG_COMPONENTS and including the next file up the line. * sysdeps/powerpc/e_sqrt.c: Move contents to w_sqrt.c and provide stub. * sysdeps/powerpc/e_sqrtf.c: Likewise. * sysdeps/powerpc/s_copysignf.S: Provide empty file; symbol is with the double precision version. * sysdeps/powerpc/s_fabsf.S: Likewise. * sysdeps/powerpc/s_isnanf.S: Likewise.
1997-08-29 01:19:12 +00:00
INSERT_WORDS (sx, sxi, xi1);
Update. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * iconvdata/Makefile: Use rpath $ORIGIN for modules which use any of the conversion libraries. * include/features.h: Mention latest extensions in _POSIX_C_SOURCE description. * libio/genops.c (list_all_lock): New variable. (_IO_un_link, _IO_link_in): Acquire lock before modifying _IO_list_all. [PR libc/911]. * sysdeps/i386/i686/strtok.s: Add missing cld. * sysdeps/i386/i686/mempcpy.S: New file. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> Suppress parentheses warnings: * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): here, * sysdeps/powerpc/dl-machine.c: here, * sysdeps/powerpc/fclrexcpt.c (feclearexcept): here, * sysdeps/powerpc/fesetround.c (fesetround): here, * sysdeps/powerpc/feupdateenv.c (feupdateenv): here, * sysdeps/powerpc/fraiseexcpt.c (feraiseexcept): here, * sysdeps/powerpc/fsetexcptflg.c (fesetexceptflag): here, * sysdeps/powerpc/s_rint.c (__rint): here, * sysdeps/powerpc/s_rintf.c (__rintf): here, * sysdeps/powerpc/w_sqrt.c (__sqrt): here, * sysdeps/powerpc/w_sqrtf.c (__sqrtf): and here. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * wcsmbs/wcstold.c [__NO_LONG_DOUBLE_MATH]: Include wchar.h. * wcsmbs/wcstold_l.c [__NO_LONG_DOUBLE_MATH]: Likewise. Also define appropropriate prototypes, correct procedure names. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/generic/crypt-entry.c: Prototype __crypt_r, suppress warning. (__crypt_r): Add __restrict. * sysdeps/generic/crypt.h: Remove internal routine. Add __restrict. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * stdlib/longlong.h: Add missing #else in SPARC definitions. 1998-12-30 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org>: * sysdeps/unix/sysv/linux/mips/sgidefs.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/asm.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/Makefile: Remove delete files. * sysdeps/unix/sysv/linux/mips/Dist: Remove deleted files. * sysdeps/mips/sys/fpregdef.h: New files, enhanced versions of deleted linux specific files. * sysdeps/mips/sys/asm.h: Likewise. * sysdeps/mips/sgidefs.h: Likewise. * sysdeps/mips/fpregdef.h: Likewise. * sysdeps/mips/regdef.h: Likewise. * sysdeps/mips/Makefile: Add new headers. * sysdeps/mips/Dist: Add new files. * sysdeps/mips/fpu_control.h (_FPU_DEFAULT): Change value. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * iconvdata/Makefile: Remove variable assignments and rules that are now auto-generated. Include $(objpfx)iconv-rules instead. Btw, that removes a few typos. (charmaps): New variable. ($(objpfx)iconv-rules): New target. (gen-8bit-modules): Renamed from sed-generated-headers, remove .h suffixes. (gen-8bit-gap-modules): Renamed from awk-generated-headers, remove .h suffixes. (gen-special-modules): New variable. (generated-modules): New variable. (headers): Use it. (before-compile): Likewise. (generated): Likewise, and add iconv-rules. * iconvdata/euc-cn.c: Renamed from euccn.c. * iconvdata/euc-jp.c: Renamed from eucjp.c. * iconvdata/euc-kr.c: Renamed from euckr.c. * iconvdata/euc-tw.c: Renamed from euctw.c. * iconvdata/iso_6937.c: Renamed from iso6937.c. * iconvdata/iso_6937-2.c: Renamed from iso6937-2.c. * iconvdata/t.61.c: Renamed from t61.c. * iconvdata/Makefile (distribute): Adjusted for those renames. Remove $(objpfx) from names. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * sysdeps/generic/hp-timing.h: Fix comment. * sysdeps/generic/dl-hash.h: Likewise. * sysdeps/i386/i686/hp-timing.h: Likewise. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * posix/fnmatch.c (fnmatch): Always pass unsigned char values to FOLD macro. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * nss/db-Makefile ($(VAR_DB)/shadow.db): Fix last change. 1998-12-29 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Sync with current Linux 2.1.132 kernel sources. 1998-12-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org> for Linux/MIPS: * sysdeps/unix/sysv/linux/mips/syscalls.list: Add ipc, change pread/pwrite and llseek calls. * sysdeps/unix/sysv/linux/mips/sysdep.S: New file. 1998-12-29 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> * malloc/thread-m.h [_LIBC] : Fix for NO_THREADS case.
1998-12-31 18:19:19 +00:00
t_sqrt = __t_sqrt + (xi0 >> (52-32-8-1) & 0x3fe);
Update. 1997-08-29 02:36 Ulrich Drepper <drepper@cygnus.com> * Makefile (version-info.h): Use ISO form for the date. * catgets/catgetsinfo.h: Include <bits/libc-lock.h>. (struct catalog_obj): Add lock field. (__open_catalog): Remove second parameter from prototype. * catgets/catgets.c (catopen): Initialize lock field. (catgets): Don't pass second parameter to __open_catalog. * catgets/gencat.c: Initialize lock field and don't pass second parameter to __open_catalog. * catgets/open_catalog.c (__open_catalog): Decide about use of path by examining path in struct, not based on extra argument. Acquire a the lock before trying to load the catalog and release it before returning. * csu/Makefile (abi-tag.h): Make sure target directory exists. * io/Makefile (headers): Add bits/poll.h. * io/sys/poll.h: Remove definitions of POLL* constants. Include <bits/poll.h>. * sysdeps/generic/bits/poll.h: New file. * sysdeps/unix/sysv/linux/bits/poll.h: New file. * sysdeps/unix/sysv/linux/m68k/bits/poll.h: New file. * sysdeps/unix/sysv/linux/mips/bits/poll.h: New file. * sysdeps/unix/sysv/linux/sparc/bits/poll.h: New file. * libio/fileops.c (_IO_file_read, _IO_file_write): Remove dead code. * malloc/obstack.c: Add casts to keep very verbose compilers on 64bit machine quiet. * nss/Makefile (libnss_db.so): Find libdb.so in db2 directory. 1997-08-28 17:30 Ulrich Drepper <drepper@cygnus.com> * catgets/catgets.c (catopen): Correctly determine length of string in NLSPATH evironment variable. Patch by HJ Lu <hjl@gnu.ai.mit.edu>. 1997-08-27 23:19 Richard Henderson <rth@cygnus.com> * sysdeps/generic/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): Provide default macro to track down arguments from stack start. (_dl_sysdep_start): Use it. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Truncate to simply providing a special DL_FIND_ARG_COMPONENTS and including the next file up the line. * sysdeps/powerpc/e_sqrt.c: Move contents to w_sqrt.c and provide stub. * sysdeps/powerpc/e_sqrtf.c: Likewise. * sysdeps/powerpc/s_copysignf.S: Provide empty file; symbol is with the double precision version. * sysdeps/powerpc/s_fabsf.S: Likewise. * sysdeps/powerpc/s_isnanf.S: Likewise.
1997-08-29 01:19:12 +00:00
sg = t_sqrt[0];
sy = t_sqrt[1];
/* Here we have three Newton-Rhapson iterations each of a
division and a square root and the remainder of the
argument reduction, all interleaved. */
sd = -(sg*sg - sx);
Update. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * iconvdata/Makefile: Use rpath $ORIGIN for modules which use any of the conversion libraries. * include/features.h: Mention latest extensions in _POSIX_C_SOURCE description. * libio/genops.c (list_all_lock): New variable. (_IO_un_link, _IO_link_in): Acquire lock before modifying _IO_list_all. [PR libc/911]. * sysdeps/i386/i686/strtok.s: Add missing cld. * sysdeps/i386/i686/mempcpy.S: New file. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> Suppress parentheses warnings: * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): here, * sysdeps/powerpc/dl-machine.c: here, * sysdeps/powerpc/fclrexcpt.c (feclearexcept): here, * sysdeps/powerpc/fesetround.c (fesetround): here, * sysdeps/powerpc/feupdateenv.c (feupdateenv): here, * sysdeps/powerpc/fraiseexcpt.c (feraiseexcept): here, * sysdeps/powerpc/fsetexcptflg.c (fesetexceptflag): here, * sysdeps/powerpc/s_rint.c (__rint): here, * sysdeps/powerpc/s_rintf.c (__rintf): here, * sysdeps/powerpc/w_sqrt.c (__sqrt): here, * sysdeps/powerpc/w_sqrtf.c (__sqrtf): and here. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * wcsmbs/wcstold.c [__NO_LONG_DOUBLE_MATH]: Include wchar.h. * wcsmbs/wcstold_l.c [__NO_LONG_DOUBLE_MATH]: Likewise. Also define appropropriate prototypes, correct procedure names. 1998-12-30 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/generic/crypt-entry.c: Prototype __crypt_r, suppress warning. (__crypt_r): Add __restrict. * sysdeps/generic/crypt.h: Remove internal routine. Add __restrict. 1998-12-31 Ulrich Drepper <drepper@cygnus.com> * stdlib/longlong.h: Add missing #else in SPARC definitions. 1998-12-30 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org>: * sysdeps/unix/sysv/linux/mips/sgidefs.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/asm.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/sys/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/regdef.h: Removed. * sysdeps/unix/sysv/linux/mips/fpregdef.h: Removed. * sysdeps/unix/sysv/linux/mips/Makefile: Remove delete files. * sysdeps/unix/sysv/linux/mips/Dist: Remove deleted files. * sysdeps/mips/sys/fpregdef.h: New files, enhanced versions of deleted linux specific files. * sysdeps/mips/sys/asm.h: Likewise. * sysdeps/mips/sgidefs.h: Likewise. * sysdeps/mips/fpregdef.h: Likewise. * sysdeps/mips/regdef.h: Likewise. * sysdeps/mips/Makefile: Add new headers. * sysdeps/mips/Dist: Add new files. * sysdeps/mips/fpu_control.h (_FPU_DEFAULT): Change value. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * iconvdata/Makefile: Remove variable assignments and rules that are now auto-generated. Include $(objpfx)iconv-rules instead. Btw, that removes a few typos. (charmaps): New variable. ($(objpfx)iconv-rules): New target. (gen-8bit-modules): Renamed from sed-generated-headers, remove .h suffixes. (gen-8bit-gap-modules): Renamed from awk-generated-headers, remove .h suffixes. (gen-special-modules): New variable. (generated-modules): New variable. (headers): Use it. (before-compile): Likewise. (generated): Likewise, and add iconv-rules. * iconvdata/euc-cn.c: Renamed from euccn.c. * iconvdata/euc-jp.c: Renamed from eucjp.c. * iconvdata/euc-kr.c: Renamed from euckr.c. * iconvdata/euc-tw.c: Renamed from euctw.c. * iconvdata/iso_6937.c: Renamed from iso6937.c. * iconvdata/iso_6937-2.c: Renamed from iso6937-2.c. * iconvdata/t.61.c: Renamed from t61.c. * iconvdata/Makefile (distribute): Adjusted for those renames. Remove $(objpfx) from names. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * sysdeps/generic/hp-timing.h: Fix comment. * sysdeps/generic/dl-hash.h: Likewise. * sysdeps/i386/i686/hp-timing.h: Likewise. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * posix/fnmatch.c (fnmatch): Always pass unsigned char values to FOLD macro. 1998-12-28 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * nss/db-Makefile ($(VAR_DB)/shadow.db): Fix last change. 1998-12-29 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Sync with current Linux 2.1.132 kernel sources. 1998-12-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> Patches by Ralf Baechle <ralf@gnu.org> for Linux/MIPS: * sysdeps/unix/sysv/linux/mips/syscalls.list: Add ipc, change pread/pwrite and llseek calls. * sysdeps/unix/sysv/linux/mips/sysdep.S: New file. 1998-12-29 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> * malloc/thread-m.h [_LIBC] : Fix for NO_THREADS case.
1998-12-31 18:19:19 +00:00
fsgi = (xi0 + 0x40000000) >> 1 & 0x7ff00000;
Update. 1997-08-29 02:36 Ulrich Drepper <drepper@cygnus.com> * Makefile (version-info.h): Use ISO form for the date. * catgets/catgetsinfo.h: Include <bits/libc-lock.h>. (struct catalog_obj): Add lock field. (__open_catalog): Remove second parameter from prototype. * catgets/catgets.c (catopen): Initialize lock field. (catgets): Don't pass second parameter to __open_catalog. * catgets/gencat.c: Initialize lock field and don't pass second parameter to __open_catalog. * catgets/open_catalog.c (__open_catalog): Decide about use of path by examining path in struct, not based on extra argument. Acquire a the lock before trying to load the catalog and release it before returning. * csu/Makefile (abi-tag.h): Make sure target directory exists. * io/Makefile (headers): Add bits/poll.h. * io/sys/poll.h: Remove definitions of POLL* constants. Include <bits/poll.h>. * sysdeps/generic/bits/poll.h: New file. * sysdeps/unix/sysv/linux/bits/poll.h: New file. * sysdeps/unix/sysv/linux/m68k/bits/poll.h: New file. * sysdeps/unix/sysv/linux/mips/bits/poll.h: New file. * sysdeps/unix/sysv/linux/sparc/bits/poll.h: New file. * libio/fileops.c (_IO_file_read, _IO_file_write): Remove dead code. * malloc/obstack.c: Add casts to keep very verbose compilers on 64bit machine quiet. * nss/Makefile (libnss_db.so): Find libdb.so in db2 directory. 1997-08-28 17:30 Ulrich Drepper <drepper@cygnus.com> * catgets/catgets.c (catopen): Correctly determine length of string in NLSPATH evironment variable. Patch by HJ Lu <hjl@gnu.ai.mit.edu>. 1997-08-27 23:19 Richard Henderson <rth@cygnus.com> * sysdeps/generic/dl-sysdep.c (DL_FIND_ARG_COMPONENTS): Provide default macro to track down arguments from stack start. (_dl_sysdep_start): Use it. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Truncate to simply providing a special DL_FIND_ARG_COMPONENTS and including the next file up the line. * sysdeps/powerpc/e_sqrt.c: Move contents to w_sqrt.c and provide stub. * sysdeps/powerpc/e_sqrtf.c: Likewise. * sysdeps/powerpc/s_copysignf.S: Provide empty file; symbol is with the double precision version. * sysdeps/powerpc/s_fabsf.S: Likewise. * sysdeps/powerpc/s_isnanf.S: Likewise.
1997-08-29 01:19:12 +00:00
sy2 = sy + sy;
sg = sy*sd + sg; /* 16-bit approximation to sqrt(sx). */
INSERT_WORDS (fsg, fsgi, 0);
e = -(sy*sg - almost_half);
sd = -(sg*sg - sx);
if ((xi0 & 0x7ff00000) == 0)
goto denorm;
sy = sy + e*sy2;
sg = sg + sy*sd; /* 32-bit approximation to sqrt(sx). */
sy2 = sy + sy;
e = -(sy*sg - almost_half);
sd = -(sg*sg - sx);
sy = sy + e*sy2;
shx = sx * fsg;
sg = sg + sy*sd; /* 64-bit approximation to sqrt(sx),
but perhaps rounded incorrectly. */
sy2 = sy + sy;
g = sg * fsg;
e = -(sy*sg - almost_half);
d = -(g*sg - shx);
sy = sy + e*sy2;
fesetenv_register (fe);
return g + sy*d;
denorm:
/* For denormalised numbers, we normalise, calculate the
square root, and return an adjusted result. */
fesetenv_register (fe);
return __sqrt(x * two108) * twom54;
}
}
else if (x < 0)
{
#ifdef FE_INVALID_SQRT
feraiseexcept (FE_INVALID_SQRT);
/* For some reason, some PowerPC processors don't implement
FE_INVALID_SQRT. I guess no-one ever thought they'd be
used for square roots... :-) */
if (!fetestexcept (FE_INVALID))
#endif
feraiseexcept (FE_INVALID);
#ifndef _IEEE_LIBM
if (_LIB_VERSION != _IEEE_)
x = __kernel_standard(x,x,26);
else
#endif
x = *(const float*)&a_nan;
}
return f_wash(x);
}
weak_alias (__sqrt, sqrt)
/* Strictly, this is wrong, but the only places where _ieee754_sqrt is
used will not pass in a negative result. */
strong_alias(__sqrt,__ieee754_sqrt)