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-rw-r--r--sysdeps/alpha/ffs.S87
-rw-r--r--sysdeps/alpha/ffsll.S1
-rw-r--r--sysdeps/generic/ffs.c8
-rw-r--r--sysdeps/generic/ffsll.c42
-rw-r--r--sysdeps/i386/ffs.c5
-rw-r--r--sysdeps/i386/i486/bits/string.h19
-rw-r--r--sysdeps/i386/i686/ffs.c3
-rw-r--r--sysdeps/libm-ieee754/k_standard.c5
-rw-r--r--sysdeps/m68k/ffs.c5
-rw-r--r--sysdeps/powerpc/ffs.c3
-rw-r--r--sysdeps/unix/sysv/linux/alpha/bits/time.h6
-rw-r--r--sysdeps/unix/sysv/linux/mips/bits/time.h6
12 files changed, 146 insertions, 44 deletions
diff --git a/sysdeps/alpha/ffs.S b/sysdeps/alpha/ffs.S
index 6eb3afdff7..91cce4182b 100644
--- a/sysdeps/alpha/ffs.S
+++ b/sysdeps/alpha/ffs.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
    Contributed by David Mosberger (davidm@cs.arizona.edu).
    This file is part of the GNU C Library.
 
@@ -25,49 +25,66 @@
 	.set noreorder
 	.set noat
 
+
 ENTRY(__ffs)
 #ifdef PROF
 	ldgp	gp, 0(pv)
 	lda	AT, _mcount
 	jsr	AT, (AT), _mcount
 	.prologue 1
+	zap	$16, 0xF0, $16
+	br	$ffsl..ng
 #else
 	.prologue 0
+	zap	$16, 0xF0, $16
+	# FALLTHRU
 #endif
+END(__ffs)
 
-	ldq_u	zero, 0(sp)	# on the 21064, this helps dual-issuing
-	addl	a0, zero, a0	# the last insn and reduces the stall
-	negq    a0, t0		# due to the srl instruction
-	and     a0, t0, t0
-	clr	v0
-	beq	a0, $done
-
-	# now do binary search for first non-zero bit
-
-	zapnot	t0, 0x03, t2
-	addq    v0, 16, t3
-	cmoveq  t2, t3, v0
-
-	zapnot	t0, 0x05, t2
-	addq    v0, 8, t3
-	cmoveq  t2, t3, v0
-
-	srl	t0, v0, t0
-	addq	v0, 1, v0
-
-	and     t0, 0x0f, t2
-	addq    v0, 4, t3
-	cmoveq  t2, t3, v0
-
-	and     t0, 0x33, t2
-	addq    v0, 2, t3
-	cmoveq  t2, t3, v0
-
-	and     t0, 0x55, t2
-	addq    v0, 1, t3
-	cmoveq  t2, t3, v0
-
-$done:	ret
+	.align 4
+ENTRY(ffsl)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+$ffsl..ng:
+#else
+	.prologue 0
+#endif
+	not	$16, $1		# e0    :
+	ldi	$2, -1		# .. e1 :
+	cmpbge	$1, $2, $3	# e0    : bit N == 1 for byte N == 0
+	clr	$0		# .. e1 :
+	addq	$3, 1, $4	# e0    :
+	bic	$4, $3, $3	# e1    : bit N == 1 for first byte N != 0
+	and	$3, 0xF0, $4	# e0    :
+	and	$3, 0xCC, $5	# .. e1 :
+	and	$3, 0xAA, $6	# e0    :
+	cmovne	$4, 4, $0	# .. e1 :
+	cmovne	$5, 2, $5	# e0    :
+	cmovne  $6, 1, $6	# .. e1 :
+	addl	$0, $5, $0	# e0    :
+	addl	$0, $6, $0	# e1    : $0 == N
+	extbl	$16, $0, $1	# e0    : $1 == byte N
+	ldi	$2, 1		# .. e1 :
+	negq	$1, $3		# e0    :
+	and	$3, $1, $3	# e1    : bit N == least bit set of byte N
+	and	$3, 0xF0, $4	# e0    :
+	and	$3, 0xCC, $5	# .. e1 :
+	and	$3, 0xAA, $6	# e0    :
+	cmovne	$4, 5, $2	# .. e1 :
+	cmovne	$5, 2, $5	# e0    :
+	cmovne	$6, 1, $6	# .. e1 :
+	s8addl	$0, $2, $0	# e0    : mult byte ofs by 8 and sum
+	addl	$5, $6, $5	# .. e1 :
+	addl	$0, $5, $0	# e0    :
+	nop			# .. e1 :
+	cmoveq	$16, 0, $0	# e0    : trap input == 0 case.
+	ret			# .. e1 : 18
+
+END(ffsl)
 
-	END(__ffs)
 weak_alias (__ffs, ffs)
+weak_extern (ffsl)
+weak_alias (ffsl, ffsll)
diff --git a/sysdeps/alpha/ffsll.S b/sysdeps/alpha/ffsll.S
new file mode 100644
index 0000000000..b2f46d899c
--- /dev/null
+++ b/sysdeps/alpha/ffsll.S
@@ -0,0 +1 @@
+/* This function is defined in ffs.S.  */
diff --git a/sysdeps/generic/ffs.c b/sysdeps/generic/ffs.c
index 35cf218c4b..3f57f5cc0f 100644
--- a/sysdeps/generic/ffs.c
+++ b/sysdeps/generic/ffs.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Torbjorn Granlund (tege@sics.se).
 
@@ -18,6 +18,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <limits.h>
+#define ffsl __something_else
 #include <string.h>
 
 #undef	ffs
@@ -46,3 +47,8 @@ __ffs (i)
   return table[x >> a] + a;
 }
 weak_alias (__ffs, ffs)
+
+#if ULONG_MAX == UINT_MAX
+#undef ffsl
+weak_alias (__ffs, ffsl)
+#endif
diff --git a/sysdeps/generic/ffsll.c b/sysdeps/generic/ffsll.c
new file mode 100644
index 0000000000..b6b836c1a3
--- /dev/null
+++ b/sysdeps/generic/ffsll.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Torbjorn Granlund (tege@sics.se).
+
+   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 <limits.h>
+#define ffsl __something_else
+#include <string.h>
+
+#undef	ffsll
+
+/* Find the first bit set in I.  */
+int
+ffsll (i)
+     long long int i;
+{
+  unsigned long long int x = i & -i;
+
+  if (x <= 0xffffffff)
+    return ffs (i);
+  else
+    return 32 + ffs (i >> 32);
+}
+
+#if ULONG_MAX != UINT_MAX
+#undef ffsl
+weak_alias (ffsll, ffsl)
+#endif
diff --git a/sysdeps/i386/ffs.c b/sysdeps/i386/ffs.c
index 4f46dc7256..97e9c4040b 100644
--- a/sysdeps/i386/ffs.c
+++ b/sysdeps/i386/ffs.c
@@ -1,7 +1,7 @@
 /* ffs -- find first set bit in a word, counted from least significant end.
    For Intel 80x86, x>=3.
    This file is part of the GNU C Library.
-   Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1991, 92, 93, 94, 97, 98 Free Software Foundation, Inc.
    Contributed by Torbjorn Granlund (tege@sics.se).
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,6 +19,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#define ffsl __something_else
 #include <string.h>
 
 #undef	ffs
@@ -41,6 +42,8 @@ __ffs (x)
   return cnt;
 }
 weak_alias (__ffs, ffs)
+#undef ffsl
+weak_alias (__ffs, ffsl)
 
 #else
 #include <sysdeps/generic/ffs.c>
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 */
diff --git a/sysdeps/i386/i686/ffs.c b/sysdeps/i386/i686/ffs.c
index c858b31a78..799128b2ed 100644
--- a/sysdeps/i386/i686/ffs.c
+++ b/sysdeps/i386/i686/ffs.c
@@ -19,6 +19,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#define ffsl __something_else
 #include <string.h>
 
 #undef	ffs
@@ -39,6 +40,8 @@ __ffs (x)
   return cnt + 1;
 }
 weak_alias (__ffs, ffs)
+#undef ffsl
+weak_alias (__ffs, ffsl)
 
 #else
 #include <sysdeps/generic/ffs.c>
diff --git a/sysdeps/libm-ieee754/k_standard.c b/sysdeps/libm-ieee754/k_standard.c
index 42ecca9980..22300652e9 100644
--- a/sysdeps/libm-ieee754/k_standard.c
+++ b/sysdeps/libm-ieee754/k_standard.c
@@ -29,7 +29,10 @@ static char rcsid[] = "$NetBSD: k_standard.c,v 1.6 1995/05/10 20:46:35 jtc Exp $
 #undef fflush
 #endif	/* !defined(_USE_WRITE) */
 
-#ifdef __STDC__
+/* XXX gcc versions until now don't delay the 0.0/0.0 division until
+   runtime but produce NaN at copile time.  This is wrong since the
+   exceptions are not set correctly.  */
+#if 0 && defined __STDC__
 static const double zero = 0.0;	/* used as const */
 #else
 static double zero = 0.0;	/* used as const */
diff --git a/sysdeps/m68k/ffs.c b/sysdeps/m68k/ffs.c
index d30bd9d6ff..bed3f46866 100644
--- a/sysdeps/m68k/ffs.c
+++ b/sysdeps/m68k/ffs.c
@@ -1,7 +1,7 @@
 /* ffs -- find first set bit in a word, counted from least significant end.
    For mc68020, mc68030, mc68040.
    This file is part of the GNU C Library.
-   Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
    Contributed by Torbjorn Granlund (tege@sics.se).
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,6 +19,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#define ffsl __something_else
 #include <string.h>
 
 #undef	ffs
@@ -36,6 +37,8 @@ __ffs (x)
   return 32 - cnt;
 }
 weak_alias (__ffs, ffs)
+#undef ffsl
+weak_alias (__ffs, ffsl)
 
 #else
 
diff --git a/sysdeps/powerpc/ffs.c b/sysdeps/powerpc/ffs.c
index 2ae12e6338..fb1b2f4592 100644
--- a/sysdeps/powerpc/ffs.c
+++ b/sysdeps/powerpc/ffs.c
@@ -1,6 +1,6 @@
 /* Find first set bit in a word, counted from least significant end.
    For PowerPC.
-   Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
    Contributed by Torbjorn Granlund (tege@sics.se).
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -29,3 +29,4 @@ __ffs (int x)
   return 32 - cnt;
 }
 weak_alias (__ffs, ffs)
+weak_alais (__ffs, ffsl)
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/time.h b/sysdeps/unix/sysv/linux/alpha/bits/time.h
index 7f26efd031..acb2b41f97 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/time.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/time.h
@@ -1,5 +1,5 @@
 /* System-dependent timing definitions.  Linux/Alpha version.
-   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998 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
@@ -33,9 +33,11 @@
    XSI-conformant systems. */
 #  define CLOCKS_PER_SEC  1000000
 
+#  ifndef __STRICT_ANSI__
 /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
    presents the real value for clock ticks per second for the system.  */
-#  define CLK_TCK 1024
+#   define CLK_TCK 1024
+#  endif
 
 # endif	/* bits/time.h */
 #endif /* !__need_timeval */
diff --git a/sysdeps/unix/sysv/linux/mips/bits/time.h b/sysdeps/unix/sysv/linux/mips/bits/time.h
index a7b268d0f8..91dc65c910 100644
--- a/sysdeps/unix/sysv/linux/mips/bits/time.h
+++ b/sysdeps/unix/sysv/linux/mips/bits/time.h
@@ -1,5 +1,5 @@
 /* System-dependent timing definitions.  Linux/MIPS version.
-   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998 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
@@ -33,9 +33,11 @@
    XSI-conformant systems. */
 #  define CLOCKS_PER_SEC  1000000
 
+#  ifndef __STRICT_ANSI__
 /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
    presents the real value for clock ticks per second for the system.  */
-#  define CLK_TCK 100		/* XXX not correct for all systems.  */
+#   define CLK_TCK 100		/* XXX not correct for all systems.  */
+#  endif
 
 # endif  /* bits/time.h */
 #endif
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-12 00:46:27 +0000