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authorUlrich Drepper <drepper@redhat.com>1998-06-15 18:12:05 +0000
committerUlrich Drepper <drepper@redhat.com>1998-06-15 18:12:05 +0000
commitfed8f7f7aeb06dfae0dfbfb085c6857cc457c254 (patch)
tree292caa308359deaa5fed820469d0b37805126e68 /sysdeps/i386/i686/ffs.c
parente5bafd559a4c155fa9d1b1a669c67d99ea773565 (diff)
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Update.
1998-06-15 18:07 Ulrich Drepper <drepper@cygnus.com> * iconvdata/ksc5601.h: Clean up a bit. 1998-06-15 14:35 Ulrich Drepper <drepper@cygnus.com> * sunrpc/svc_tcp.c (readtcp): Also listen to all the other connections and process incoming data. * sunrpc/xdr_rec.c (set_input_fragment): Only recognize zero length fragments as invalid. Patches by Thorsten Kukuk <kukuk@weber.uni-paderborn.de>. 1998-06-13 Andreas Jaeger <aj@arthur.rhein-neckar.de> Removal of duplicates like "the the". * manual/time.texi (TZ Variable): Likewise. * manual/users.texi (Manipulating the Database): Likewise. * manual/sysinfo.texi (Filesystem handling): Likewise. * manual/signal.texi (Signaling Yourself): Likewise. * manual/message.texi (Message Translation): Likewise. (Common Usage): Likewise. * manual/llio.texi: Likewise. * manual/arith.texi (Old-style number conversion): Likewise. * manual/argp.texi (Argp): Likewise. (Argp Parsers): Likewise. (Argp Help Filtering): Likewise. * hesiod/README.hesiod: Correct typo. * manual/llio.texi: Correct typos. * manual/sysinfo.texi: Likewise. 1998-06-13 Andreas Jaeger <aj@arthur.rhein-neckar.de> * rt/aio.h: Rename __op to __operation for g++. 1998-06-13 20:17 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu> * iconvdata/gen-8bit-gap.sh: Use awk not perl. Clean up sed script. * iconvdata/gen-8bit-gap-1.sh: Likewise. * iconvdata/gen-8bit.sh: Clean up sed script. * iconvdata/Makefile: Remove all PERL conditionals; build all the modules all the time. Export AWK. (gen-8bit-gap): Delete setting of PERL. (gen-8bit-gap-1): Likewise. (perl-generated-headers): Renamed awk-generated-headers. * iconvdata/gap.pl: Removed. * iconvdata/gaptab.pl: Removed. * iconvdata/gap.awk: New file. * iconvdata/gaptab.awk: New file. 1998-06-15 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/Dist: Add errno-loc.c. * sysdeps/unix/sysv/linux/alpha/glob.c: Add prototypes for the __new_* functions. 1998-06-14 14:21 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu> * stdio-common/bug12.c: New test for fread()/fseek(). * stdio-common/Makefile (tests): Add bug12.
Diffstat (limited to 'sysdeps/i386/i686/ffs.c')
-rw-r--r--sysdeps/i386/i686/ffs.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/ffs.c b/sysdeps/i386/i686/ffs.c
new file mode 100644
index 0000000..c858b31
--- /dev/null
+++ b/sysdeps/i386/i686/ffs.c
@@ -0,0 +1,45 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+ For Intel 80x86, x>=6.
+ This file is part of the GNU C Library.
+ Copyright (C) 1991, 92, 93, 94, 97, 98 Free Software Foundation, Inc.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>.
+
+ 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 <string.h>
+
+#undef ffs
+
+#ifdef __GNUC__
+
+int
+__ffs (x)
+ int x;
+{
+ int cnt;
+ int tmp;
+
+ asm ("bsfl %2,%0\n" /* Count low bits in X and store in %1. */
+ "cmovel %1,%0\n" /* If number was zero, use -1 as result. */
+ : "=&r" (cnt), "=r" (tmp) : "rm" (x), "1" (-1));
+
+ return cnt + 1;
+}
+weak_alias (__ffs, ffs)
+
+#else
+#include <sysdeps/generic/ffs.c>
+#endif