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authorRoland McGrath <roland@gnu.org>2008-11-26 07:26:32 +0000
committerRoland McGrath <roland@gnu.org>2008-11-26 07:26:32 +0000
commitc0439b95b88bccacb5562e372f881beb23376a72 (patch)
treeaea008f060bef693d43f285f5adb5ece05cb7db6 /sysdeps/alpha/alphaev6/memchr.S
parentf1092afe15ad779d61a1420c05854a9122d3ce5e (diff)
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Moved alpha to ports repository.
2008-11-25  Roland McGrath  <roland@redhat.com>

	* sysdeps/alpha, sysdeps/unix/bsd/osf/alpha,
	sysdeps/unix/bsd/Attic/osf1/alpha, sysdeps/unix/sysv/linux/alpha,
	sysdeps/unix/sysv/linux/alpha/alpha, sysdeps/unix/alpha,
	sysdeps/mach/alpha, sysdeps/mach/hurd/alpha:
	Subdirectories moved to ports repository.
	* configure.in (base_machine): Remove alpha case.
Diffstat (limited to 'sysdeps/alpha/alphaev6/memchr.S')
-rw-r--r--sysdeps/alpha/alphaev6/memchr.S193
1 files changed, 0 insertions, 193 deletions
diff --git a/sysdeps/alpha/alphaev6/memchr.S b/sysdeps/alpha/alphaev6/memchr.S
deleted file mode 100644
index 88e91fa988..0000000000
--- a/sysdeps/alpha/alphaev6/memchr.S
+++ /dev/null
@@ -1,193 +0,0 @@
-/* Copyright (C) 2000, 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David Mosberger (davidm@cs.arizona.edu).
-   EV6 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
-
-   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.  */
-
-#include <sysdep.h>
-
-	.arch ev6
-        .set noreorder
-        .set noat
-
-ENTRY(__memchr)
-#ifdef PROF
-	ldgp	gp, 0(pv)
-	lda	AT, _mcount
-	jsr	AT, (AT), _mcount
-	.prologue 1
-#else
-	.prologue 0
-#endif
-
-	# Hack -- if someone passes in (size_t)-1, hoping to just
-	# search til the end of the address space, we will overflow
-	# below when we find the address of the last byte.  Given
-	# that we will never have a 56-bit address space, cropping
-	# the length is the easiest way to avoid trouble.
-	zap	$18, 0x80, $5	# U : Bound length
-	beq	$18, $not_found	# U :
-        ldq_u   $1, 0($16)	# L : load first quadword Latency=3
-	and	$17, 0xff, $17	# E : L L U U : 00000000000000ch
-
-	insbl	$17, 1, $2	# U : 000000000000ch00
-	cmpult	$18, 9, $4	# E : small (< 1 quad) string?
-	or	$2, $17, $17	# E : 000000000000chch
-        lda     $3, -1($31)	# E : U L L U
-
-	sll	$17, 16, $2	# U : 00000000chch0000
-	addq	$16, $5, $5	# E : Max search address
-	or	$2, $17, $17	# E : 00000000chchchch
-	sll	$17, 32, $2	# U : U L L U : chchchch00000000
-
-	or	$2, $17, $17	# E : chchchchchchchch
-	extql	$1, $16, $7	# U : $7 is upper bits
-	beq	$4, $first_quad	# U :
-	ldq_u	$6, -1($5)	# L : L U U L : eight or less bytes to search Latency=3
-
-	extqh	$6, $16, $6	# U : 2 cycle stall for $6
-	mov	$16, $0		# E :
-	nop			# E :
-	or	$7, $6, $1	# E : L U L U $1 = quadword starting at $16
-
-	# Deal with the case where at most 8 bytes remain to be searched
-	# in $1.  E.g.:
-	#	$18 = 6
-	#	$1 = ????c6c5c4c3c2c1
-$last_quad:
-	negq	$18, $6		# E :
-        xor	$17, $1, $1	# E :
-	srl	$3, $6, $6	# U : $6 = mask of $18 bits set
-        cmpbge  $31, $1, $2	# E : L U L U
-
-	nop
-	nop
-	and	$2, $6, $2	# E :
-        beq     $2, $not_found	# U : U L U L
-
-$found_it:
-#if defined(__alpha_fix__) && defined(__alpha_cix__)
-	/*
-	 * Since we are guaranteed to have set one of the bits, we don't
-	 * have to worry about coming back with a 0x40 out of cttz...
-	 */
-	cttz	$2, $3		# U0 :
-	addq	$0, $3, $0	# E : All done
-	nop			# E :
-	ret			# L0 : L U L U
-#else
-	/*
-	 * Slow and clunky.  It can probably be improved.
-	 * An exercise left for others.
-	 */
-        negq    $2, $3		# E :
-        and     $2, $3, $2	# E :
-        and     $2, 0x0f, $1	# E :
-        addq    $0, 4, $3	# E :
-
-        cmoveq  $1, $3, $0	# E : Latency 2, extra map cycle
-	nop			# E : keep with cmov
-        and     $2, 0x33, $1	# E :
-        addq    $0, 2, $3	# E : U L U L : 2 cycle stall on $0
-
-        cmoveq  $1, $3, $0	# E : Latency 2, extra map cycle
-	nop			# E : keep with cmov
-        and     $2, 0x55, $1	# E :
-        addq    $0, 1, $3	# E : U L U L : 2 cycle stall on $0
-
-        cmoveq  $1, $3, $0	# E : Latency 2, extra map cycle
-	nop
-	nop
-	ret			# L0 : L U L U
-#endif
-
-	# Deal with the case where $18 > 8 bytes remain to be
-	# searched.  $16 may not be aligned.
-	.align 4
-$first_quad:
-	andnot	$16, 0x7, $0	# E :
-        insqh   $3, $16, $2	# U : $2 = 0000ffffffffffff ($16<0:2> ff)
-        xor	$1, $17, $1	# E :
-	or	$1, $2, $1	# E : U L U L $1 = ====ffffffffffff
-
-        cmpbge  $31, $1, $2	# E :
-        bne     $2, $found_it	# U :
-	# At least one byte left to process.
-	ldq	$1, 8($0)	# L :
-	subq	$5, 1, $18	# E : U L U L
-
-	addq	$0, 8, $0	# E :
-	# Make $18 point to last quad to be accessed (the
-	# last quad may or may not be partial).
-	andnot	$18, 0x7, $18	# E :
-	cmpult	$0, $18, $2	# E :
-	beq	$2, $final	# U : U L U L
-
-	# At least two quads remain to be accessed.
-
-	subq	$18, $0, $4	# E : $4 <- nr quads to be processed
-	and	$4, 8, $4	# E : odd number of quads?
-	bne	$4, $odd_quad_count # U :
-	# At least three quads remain to be accessed
-	mov	$1, $4		# E : L U L U : move prefetched value to correct reg
-
-	.align	4
-$unrolled_loop:
-	ldq	$1, 8($0)	# L : prefetch $1
-	xor	$17, $4, $2	# E :
-	cmpbge	$31, $2, $2	# E :
-	bne	$2, $found_it	# U : U L U L
-
-	addq	$0, 8, $0	# E :
-	nop			# E :
-	nop			# E :
-	nop			# E :
-
-$odd_quad_count:
-	xor	$17, $1, $2	# E :
-	ldq	$4, 8($0)	# L : prefetch $4
-	cmpbge	$31, $2, $2	# E :
-	addq	$0, 8, $6	# E :
-
-	bne	$2, $found_it	# U :
-	cmpult	$6, $18, $6	# E :
-	addq	$0, 8, $0	# E :
-	nop			# E :
-
-	bne	$6, $unrolled_loop # U :
-	mov	$4, $1		# E : move prefetched value into $1
-	nop			# E :
-	nop			# E :
-
-$final:	subq	$5, $0, $18	# E : $18 <- number of bytes left to do
-	nop			# E :
-	nop			# E :
-	bne	$18, $last_quad	# U :
-
-$not_found:
-	mov	$31, $0		# E :
-	nop			# E :
-	nop			# E :
-	ret			# L0 :
-
-	END(__memchr)
-
-weak_alias (__memchr, memchr)
-#if !__BOUNDED_POINTERS__
-weak_alias (__memchr, __ubp_memchr)
-#endif
-libc_hidden_builtin_def (memchr)