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authorUlrich Drepper <drepper@redhat.com>1998-07-30 12:47:25 +0000
committerUlrich Drepper <drepper@redhat.com>1998-07-30 12:47:25 +0000
commitbdd421cc6d055af6a1a561344b2fa56267cad617 (patch)
treebe16db84076d9a9aa58deed3f7452fabc5fa4d04 /sysdeps/i386/i486/bits
parentccd17b3265ed22f6add55b574b684f6e11a2ea8c (diff)
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Update.
1998-07-30 12:38  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/ffs.c: Add ffsl entry point.
	* sysdeps/i386/i686/ffs.c: Likewise.
	* sysdeps/m68k/ffs.c: Likewise.
	* sysdeps/powerpc/ffs.c: Likewise.

	* sysdeps/i386/i486/bits/string.h: Add optimizations for ffs/ffsl
	on i686.

1998-07-30  Richard Henderson  <rth@cygnus.com>

	* elf/Makefile (ld-map): Move initialization below Makeconfig include.

	* sysdeps/libm-ieee754/k_standard.c (zero): Make non-const to
	work around gcc bug.

	* string/string.h (ffsl, ffsll): Prototype.
	* string/Version (GLIBC_2.1): Add them.
	* sysdeps/alpha/ffs.S: Schedule for EV5.  Add ffsl and ffsll
	entry points.
	* sysdeps/alpha/ffsll.S: New file.  Empty.
	* sysdeps/generic/ffs.c: Add ffsl and ffsll entry points.
	* sysdeps/generic/ffsll.c: New file.
	* string/Makefile (routines): Add ffsll.

1998-07-30 10:03  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/alpha/bits/time.h: Don't define CLK_TCK for
	strictly ISO C compliant programs.
	* sysdeps/unix/sysv/linux/mips/bits/time.h: Likewise.

1998-07-22  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* inet/protocols/rwhod.h: Correct typo in comment.

	* configure.in: Use better regex for gettext.
Diffstat (limited to 'sysdeps/i386/i486/bits')
-rw-r--r--sysdeps/i386/i486/bits/string.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h
index d4c2eaf715..921c66498e 100644
--- a/sysdeps/i386/i486/bits/string.h
+++ b/sysdeps/i386/i486/bits/string.h
@@ -1567,6 +1567,25 @@ __strstr_g (__const char *__haystack, __const char *__needle)
 #endif
 
 
+/* Bit find functions.  We define only the i686 version since for the other
+   processors gcc generates good code.  */
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+# ifdef __i686__
+#  define _HAVE_STRING_ARCH_ffs 1
+#  define ffs(word) (__builtin_constant_p (word)			      \
+		     ? __builtin_ffs (word)				      \
+		     : ({ int __cnt, __tmp;				      \
+			  __asm__ __volatile__				      \
+			    ("bsfl %2,%0\n\t"				      \
+			     "cmovel %1,%0"				      \
+			     : "=&r" (__cnt), "=r" (__tmp)		      \
+			     : "rm" (word), "1" (-1));			      \
+			  __cnt + 1; }))
+
+#  define ffsl(word) ffs(word)
+# endif	/* i686 */
+#endif	/* BSD || X/Open */
+
 #undef __STRING_INLINE
 
 #endif	/* use string inlines && GNU CC */