/* Copy SRC to DEST returning the address of the terminating '\0' in DEST.   For SPARC v9.   Copyright (C) 1998, 1999, 2002, 2003, 2004 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz> and                  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>#include <asm/asi.h>#ifndef XCC	.register	%g2, #scratch	.register	%g3, #scratch	.register	%g6, #scratch#endif	/* Normally, this uses	   ((xword - 0x0101010101010101) & 0x8080808080808080) 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 - 0x0101010101010101) & (~xword) & 0x8080808080808080),	   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		32ENTRY(__stpcpy)	sethi		%hi(0x01010101), %g1		/* IEU0		Group		*/	or		%g1, %lo(0x01010101), %g1	/* IEU0		Group		*/	andcc		%o0, 7, %g0			/* IEU1				*/	sllx		%g1, 32, %g2			/* IEU0		Group		*/	bne,pn		%icc, 12f			/* CTI				*/	 andcc		%o1, 7, %g3			/* IEU1				*/	or		%g1, %g2, %g1			/* IEU0		Group		*/	bne,pn		%icc, 14f			/* CTI				*/	 sllx		%g1, 7, %g2			/* IEU0		Group		*/1:	ldx		[%o1], %o3			/* Load				*/	add		%o1, 8, %o1			/* IEU1				*/2:	mov		%o3, %g3			/* IEU0		Group		*/	sub		%o3, %g1, %o2			/* IEU1				*/3:	ldxa		[%o1] ASI_PNF, %o3		/* Load				*/#ifdef EIGHTBIT_NOT_RARE	andn		%o2, %g3, %o2			/* IEU0		Group		*/#endif	add		%o0, 8, %o0			/* IEU0		Group		*/	andcc		%o2, %g2, %g0			/* IEU1				*/	add		%o1, 8, %o1			/* IEU0		Group		*/	be,a,pt		%xcc, 2b			/* CTI				*/	 stx		%g3, [%o0 - 8]			/* Store			*/	srlx		%g3, 56, %g5			/* IEU0		Group		*/	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 11f			/* CTI				*/	 srlx		%g3, 48, %g4			/* IEU0				*/	andcc		%g4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 10f			/* CTI				*/	 srlx		%g3, 40, %g5			/* IEU0				*/	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 9f			/* CTI				*/	 srlx		%g3, 32, %g4			/* IEU0				*/	andcc		%g4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 8f			/* CTI				*/	 srlx		%g3, 24, %g5			/* IEU0				*/	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 7f			/* CTI				*/	 srlx		%g3, 16, %g4			/* IEU0				*/	andcc		%g4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 6f			/* CTI				*/	 srlx		%g3, 8, %g5			/* IEU0				*/	andcc		%g5, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 5f			/* CTI				*/	 sub		%o3, %g1, %o2			/* IEU0				*/	stx		%g3, [%o0 - 8]			/* Store	Group		*/	andcc		%g3, 0xff, %g0			/* IEU1				*/	bne,pt		%icc, 3b			/* CTI				*/	 mov		%o3, %g3			/* IEU0		Group		*/4:	retl						/* CTI+IEU1	Group		*/	 sub		%o0, 1, %o0			/* IEU0				*/	.align		166:	ba,pt		%xcc, 23f			/* CTI		Group		*/	 sub		%o0, 3, %g6			/* IEU0				*/5:	sub		%o0, 2, %g6			/* IEU0		Group		*/	stb		%g5, [%o0 - 2]			/* Store			*/	srlx		%g3, 16, %g4			/* IEU0		Group		*/23:	sth		%g4, [%o0 - 4]			/* Store			*/	srlx		%g3, 32, %g4			/* IEU0		Group		*/	stw		%g4, [%o0 - 8]			/* Store			*/	retl						/* CTI+IEU1	Group		*/	 mov		%g6, %o0			/* IEU0				*/8:	ba,pt		%xcc, 24f			/* CTI		Group		*/	 sub		%o0, 5, %g6			/* IEU0				*/7:	sub		%o0, 4, %g6			/* IEU0		Group		*/	stb		%g5, [%o0 - 4]			/* Store			*/	srlx		%g3, 32, %g4			/* IEU0		Group		*/24:	stw		%g4, [%o0 - 8]			/* Store			*/	retl						/* CTI+IEU1	Group		*/	 mov		%g6, %o0 			/* IEU0				*/10:	ba,pt		%xcc, 25f			/* CTI		Group		*/	 sub		%o0, 7, %g6			/* IEU0				*/9:	sub		%o0, 6, %g6			/* IEU0		Group		*/	stb		%g5, [%o0 - 6]			/* Store			*/	srlx		%g3, 48, %g4			/* IEU0				*/25:	sth		%g4, [%o0 - 8]			/* Store	Group		*/	retl						/* CTI+IEU1	Group		*/	 mov		%g6, %o0			/* IEU0				*/11:	stb		%g5, [%o0 - 8]			/* Store	Group		*/	retl						/* CTI+IEU1	Group		*/	 sub		%o0, 8, %o0			/* IEU0				*/	.align		1612:	or		%g1, %g2, %g1			/* IEU0		Group		*/	ldub		[%o1], %o3			/* Load				*/	sllx		%g1, 7, %g2			/* IEU0		Group		*/	stb		%o3, [%o0]			/* Store	Group		*/13:	add		%o0, 1, %o0			/* IEU0				*/	add		%o1, 1, %o1			/* IEU1				*/	andcc		%o3, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 4b			/* CTI				*/	 lduba		[%o1] ASI_PNF, %o3		/* Load				*/	andcc		%o0, 7, %g0			/* IEU1		Group		*/	bne,a,pt	%icc, 13b			/* CTI				*/	 stb		%o3, [%o0]			/* Store			*/	andcc		%o1, 7, %g3			/* IEU1		Group		*/	be,a,pt		%icc, 1b			/* CTI				*/	 ldx		[%o1], %o3			/* Load				*/14:	orcc		%g0, 64, %g4			/* IEU1		Group		*/	sllx		%g3, 3, %g5			/* IEU0				*/	sub		%o1, %g3, %o1			/* IEU0		Group		*/	sub		%g4, %g5, %g4			/* IEU1				*/							/* %g1 = 0101010101010101	*							 * %g2 = 8080808080808080	*							 * %g3 = source alignment	*							 * %g5 = number of bits to shift left  *							 * %g4 = number of bits to shift right */	ldxa		[%o1] ASI_PNF, %o5		/* Load		Group		*/	addcc		%o1, 8, %o1			/* IEU1				*/15:	sllx		%o5, %g5, %o3			/* IEU0		Group		*/	ldxa		[%o1] ASI_PNF, %o5		/* Load				*/	srlx		%o5, %g4, %o4			/* IEU0		Group		*/	add		%o0, 8, %o0			/* IEU1				*/	or		%o3, %o4, %o3			/* IEU0		Group		*/	add		%o1, 8, %o1			/* IEU1				*/	sub		%o3, %g1, %o4			/* IEU0		Group		*/#ifdef EIGHTBIT_NOT_RARE	andn		%o4, %o3, %o4			/* IEU0		Group		*/#endif	andcc		%o4, %g2, %g0			/* IEU1		Group		*/	be,a,pt		%xcc, 15b			/* CTI				*/	 stx		%o3, [%o0 - 8]			/* Store			*/	srlx		%o3, 56, %o4			/* IEU0		Group		*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 22f			/* CTI				*/	 srlx		%o3, 48, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 21f			/* CTI				*/	 srlx		%o3, 40, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 20f			/* CTI				*/	 srlx		%o3, 32, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 19f			/* CTI				*/	 srlx		%o3, 24, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 18f			/* CTI				*/	 srlx		%o3, 16, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 17f			/* CTI				*/	 srlx		%o3, 8, %o4			/* IEU0				*/	andcc		%o4, 0xff, %g0			/* IEU1		Group		*/	be,pn		%icc, 16f			/* CTI				*/	 andcc		%o3, 0xff, %g0			/* IEU1		Group		*/	bne,pn		%icc, 15b			/* CTI				*/	 stx		%o3, [%o0 - 8]			/* Store			*/	retl						/* CTI+IEU1	Group		*/	 sub		%o0, 1, %o0			/* IEU0				*/	.align		1617:	ba,pt		%xcc, 26f			/* CTI		Group		*/	 subcc		%o0, 3, %g6			/* IEU1				*/18:	ba,pt		%xcc, 27f			/* CTI		Group		*/	 subcc		%o0, 4, %g6			/* IEU1				*/19:	ba,pt		%xcc, 28f			/* CTI		Group		*/	 subcc		%o0, 5, %g6			/* IEU1				*/16:	subcc		%o0, 2, %g6			/* IEU1		Group		*/	srlx		%o3, 8, %o4			/* IEU0				*/	stb		%o4, [%o0 - 2]			/* Store			*/26:	srlx		%o3, 16, %o4			/* IEU0		Group		*/	stb		%o4, [%o0 - 3]			/* Store			*/27:	srlx		%o3, 24, %o4			/* IEU0		Group		*/	stb		%o4, [%o0 - 4]			/* Store			*/28:	srlx		%o3, 32, %o4			/* IEU0		Group		*/	stw		%o4, [%o0 - 8]			/* Store			*/	retl						/* CTI+IEU1	Group		*/	 mov		%g6, %o0 			/* IEU0				*/	.align		1621:	ba,pt		%xcc, 29f			/* CTI		Group		*/	 subcc		%o0, 7, %g6			/* IEU1				*/22:	ba,pt		%xcc, 30f			/* CTI		Group		*/	 subcc		%o0, 8, %g6			/* IEU1				*/20:	subcc		%o0, 6, %g6			/* IEU1		Group		*/	srlx		%o3, 40, %o4			/* IEU0				*/	stb		%o4, [%o0 - 6]			/* Store			*/29:	srlx		%o3, 48, %o4			/* IEU0		Group		*/	stb		%o4, [%o0 - 7]			/* Store			*/30:	srlx		%o3, 56, %o4			/* IEU0		Group		*/	stb		%o4, [%o0 - 8]			/* Store			*/	retl						/* CTI+IEU1	Group		*/	 mov		%g6, %o0			/* IEU0				*/END(__stpcpy)weak_alias (__stpcpy, stpcpy)libc_hidden_def (__stpcpy)libc_hidden_builtin_def (stpcpy)