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-rw-r--r--sysdeps/alpha/strlen.S77
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diff --git a/sysdeps/alpha/strlen.S b/sysdeps/alpha/strlen.S
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-/* Copyright (C) 1996, 1997, 2003 Free Software Foundation, Inc.
-   Contributed by David Mosberger (davidm@cs.arizona.edu).
-   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 Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-/* Finds length of a 0-terminated string.  Optimized for the Alpha
-   architecture:
-
-      - memory accessed as aligned quadwords only
-      - uses cmpbge to compare 8 bytes in parallel
-      - does binary search to find 0 byte in last quadword (HAKMEM
-	needed 12 instructions to do this instead of the 8 instructions
-	that the binary search needs).
-*/
-
-#include <sysdep.h>
-
-	.set noreorder
-	.set noat
-
-ENTRY(strlen)
-#ifdef PROF
-	ldgp	gp, 0(pv)
-	lda	AT, _mcount
-	jsr	AT, (AT), _mcount
-	.prologue 1
-#else
-	.prologue 0
-#endif
-
-	ldq_u   t0, 0(a0)	# load first quadword (a0 may be misaligned)
-	lda     t1, -1(zero)
-	insqh   t1, a0, t1
-	andnot  a0, 7, v0
-	or      t1, t0, t0
-	nop			# dual issue the next two on ev5
-	cmpbge  zero, t0, t1	# t1 <- bitmask: bit i == 1 <==> i-th byte == 0
-	bne     t1, $found
-
-$loop:	ldq     t0, 8(v0)
-	addq    v0, 8, v0	# addr += 8
-	cmpbge  zero, t0, t1
-	beq     t1, $loop
-
-$found:	negq    t1, t2		# clear all but least set bit
-	and     t1, t2, t1
-
-	and     t1, 0xf0, t2	# binary search for that set bit
-	and	t1, 0xcc, t3
-	and	t1, 0xaa, t4
-	cmovne	t2, 4, t2
-	cmovne	t3, 2, t3
-	cmovne	t4, 1, t4
-	addq	t2, t3, t2
-	addq	v0, t4, v0
-	addq	v0, t2, v0
-	nop			# dual issue next two on ev4 and ev5
-
-	subq    v0, a0, v0
-	ret
-
-	END(strlen)
-libc_hidden_builtin_def (strlen)