/* memcpy.S: optimised assembly memcpy * * Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * *  This 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. * *  This 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 this library; if not, write to the Free *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */        .text        .p2align	4################################################################################# void *memcpy(void *to, const char *from, size_t count)## - NOTE: must not use any stack. exception detection performs function return#         to caller's fixup routine, aborting the remainder of the copy################################################################################        .globl		memcpy        .type		memcpy,@functionmemcpy:	or.p		gr8,gr9,gr4	orcc		gr10,gr0,gr0,icc3	or.p		gr10,gr4,gr4	beqlr		icc3,#0	# optimise based on best common alignment for to, from & count	andicc.p	gr4,#0x1f,gr0,icc0	setlos		#8,gr11	andicc.p	gr4,#0x0f,gr0,icc1	beq		icc0,#0,memcpy_32	andicc.p	gr4,#0x07,gr0,icc0	beq		icc1,#0,memcpy_16	andicc.p	gr4,#0x03,gr0,icc1	beq		icc0,#0,memcpy_8	andicc.p	gr4,#0x01,gr0,icc0	beq		icc1,#0,memcpy_4	setlos.p	#1,gr11	beq		icc0,#0,memcpy_2	# do byte by byte copy	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	ldubu.p		@(gr9,gr11),gr4	subicc		gr10,#1,gr10,icc0	stbu.p		gr4,@(gr3,gr11)	bne		icc0,#2,0b	bralr	# do halfword by halfword copymemcpy_2:	setlos		#2,gr11	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	lduhu.p		@(gr9,gr11),gr4	subicc		gr10,#2,gr10,icc0	sthu.p		gr4,@(gr3,gr11)	bne		icc0,#2,0b	bralr	# do word by word copymemcpy_4:	setlos		#4,gr11	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	ldu.p		@(gr9,gr11),gr4	subicc		gr10,#4,gr10,icc0	stu.p		gr4,@(gr3,gr11)	bne		icc0,#2,0b	bralr	# do double-word by double-word copymemcpy_8:	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	lddu.p		@(gr9,gr11),gr4	subicc		gr10,#8,gr10,icc0	stdu.p		gr4,@(gr3,gr11)	bne		icc0,#2,0b	bralr	# do quad-word by quad-word copymemcpy_16:	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	lddu		@(gr9,gr11),gr4	lddu.p		@(gr9,gr11),gr6	subicc		gr10,#16,gr10,icc0	stdu		gr4,@(gr3,gr11)	stdu.p		gr6,@(gr3,gr11)	bne		icc0,#2,0b	bralr	# do eight-word by eight-word copymemcpy_32:	sub.p		gr8,gr11,gr3	sub		gr9,gr11,gr90:	lddu		@(gr9,gr11),gr4	lddu		@(gr9,gr11),gr6	lddu		@(gr9,gr11),gr12	lddu.p		@(gr9,gr11),gr14	subicc		gr10,#32,gr10,icc0	stdu		gr4,@(gr3,gr11)	stdu		gr6,@(gr3,gr11)	stdu		gr12,@(gr3,gr11)	stdu.p		gr14,@(gr3,gr11)	bne		icc0,#2,0b	bralr	.size		memcpy, .-memcpy