/* Determine the length of a string.   For SPARC v7.   Copyright (C) 1996, 1999, 2003 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Jakub Jelinek <jj@ultra.linux.cz>.   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>	/* Normally, this uses ((xword - 0x01010101) & 0x80808080) test	   to find out if any byte in xword could be zero. This is fast, but	   also gives false alarm for any byte in range 0x81-0xff. It does	   not matter for correctness, as if this test tells us there could	   be some zero byte, we check it byte by byte, but if bytes with	   high bits set are common in the strings, then this will give poor	   performance. You can #define EIGHTBIT_NOT_RARE and the algorithm	   will use one tick slower, but more precise test	   ((xword - 0x01010101) & (~xword) & 0x80808080),	   which does not give any false alarms (but if some bits are set,	   one cannot assume from it which bytes are zero and which are not).	   It is yet to be measured, what is the correct default for glibc	   in these days for an average user.	 */	.text	.align		4ENTRY(strlen)	mov		%o0, %o1	andcc		%o0, 3, %g0	be		20f	 sethi		%hi(0x80808080), %o4	ldub		[%o0], %o5	cmp		%o5, 0	be		21f	 add		%o0, 1, %o0	andcc		%o0, 3, %g0	be		4f	 or		%o4, %lo(0x80808080), %o3	ldub		[%o0], %o5	cmp		%o5, 0	be		22f	 add		%o0, 1, %o0	andcc		%o0, 3, %g0	be		5f	 sethi		%hi(0x01010101), %o4	ldub		[%o0], %o5	cmp		%o5, 0	be		23f	 add		%o0, 1, %o0	b		11f	 or		%o4, %lo(0x01010101), %o221:	retl	 mov		0, %o022:	retl	 mov		1, %o023:	retl	 mov		2, %o020:	or		%o4, %lo(0x80808080), %o34:	sethi		%hi(0x01010101), %o45:	or		%o4, %lo(0x01010101), %o211:	ld		[%o0], %o512:	sub		%o5, %o2, %o4#ifdef EIGHTBIT_NOT_RARE	andn		%o4, %o5, %o4#endif	andcc		%o4, %o3, %g0	be		11b	 add		%o0, 4, %o0	srl		%o5, 24, %g5	andcc		%g5, 0xff, %g0	be		13f	 add		%o0, -4, %o4	srl		%o5, 16, %g5	andcc		%g5, 0xff, %g0	be		13f	 add		%o4, 1, %o4	srl		%o5, 8, %g5	andcc		%g5, 0xff, %g0	be		13f	 add		%o4, 1, %o4	andcc		%o5, 0xff, %g0	bne,a		12b	 ld		[%o0], %o5	add		%o4, 1, %o413:	retl	 sub		%o4, %o1, %o0END(strlen)libc_hidden_builtin_def (strlen)