/* * BK Id: SCCS/s.string.S 1.8 05/18/01 06:20:29 patch *//* * String handling functions for PowerPC. * * Copyright (C) 1996 Paul Mackerras. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */#define r0	0#define r3	3#define r4	4#define r5	5#define r6	6#define r7	7#define r8	8	.globl	strlenstrlen:	addi	r4,r3,-11:	lbzu	r0,1(r4)	cmpwi	0,r0,0	bne	1b	subf	r3,r3,r4	blr	.globl	memsetmemset:	rlwimi	r4,r4,8,16,23	rlwimi	r4,r4,16,0,15	addi	r6,r3,-4	cmplwi	0,r5,4	blt	7f	stwu	r4,4(r6)	beqlr	andi.	r0,r6,3	add	r5,r0,r5	subf	r6,r0,r6	rlwinm	r0,r5,32-2,2,31	mtctr	r0	bdz	6f1:	stwu	r4,4(r6)	bdnz	1b6:	andi.	r5,r5,37:	cmpwi	0,r5,0	beqlr	mtctr	r5	addi	r6,r6,38:	stbu	r4,1(r6)	bdnz	8b	blr	.globl	memmovememmove:	cmplw	0,r3,r4	bgt	backwards_memcpy	/* fall through */	.globl	memcpymemcpy:	rlwinm.	r7,r5,32-3,3,31		/* r0 = r5 >> 3 */	addi	r6,r3,-4	addi	r4,r4,-4	beq	2f			/* if less than 8 bytes to do */	andi.	r0,r6,3			/* get dest word aligned */	mtctr	r7	bne	5f1:	lwz	r7,4(r4)	lwzu	r8,8(r4)	stw	r7,4(r6)	stwu	r8,8(r6)	bdnz	1b	andi.	r5,r5,72:	cmplwi	0,r5,4	blt	3f	lwzu	r0,4(r4)	addi	r5,r5,-4	stwu	r0,4(r6)3:	cmpwi	0,r5,0	beqlr	mtctr	r5	addi	r4,r4,3	addi	r6,r6,34:	lbzu	r0,1(r4)	stbu	r0,1(r6)	bdnz	4b	blr5:	subfic	r0,r0,4	mtctr	r06:	lbz	r7,4(r4)	addi	r4,r4,1	stb	r7,4(r6)	addi	r6,r6,1	bdnz	6b	subf	r5,r0,r5	rlwinm.	r7,r5,32-3,3,31	beq	2b	mtctr	r7	b	1b	.globl	backwards_memcpybackwards_memcpy:	rlwinm.	r7,r5,32-3,3,31		/* r0 = r5 >> 3 */	add	r6,r3,r5	add	r4,r4,r5	beq	2f	andi.	r0,r6,3	mtctr	r7	bne	5f1:	lwz	r7,-4(r4)	lwzu	r8,-8(r4)	stw	r7,-4(r6)	stwu	r8,-8(r6)	bdnz	1b	andi.	r5,r5,72:	cmplwi	0,r5,4	blt	3f	lwzu	r0,-4(r4)	subi	r5,r5,4	stwu	r0,-4(r6)3:	cmpwi	0,r5,0	beqlr	mtctr	r54:	lbzu	r0,-1(r4)	stbu	r0,-1(r6)	bdnz	4b	blr5:	mtctr	r06:	lbzu	r7,-1(r4)	stbu	r7,-1(r6)	bdnz	6b	subf	r5,r0,r5	rlwinm.	r7,r5,32-3,3,31	beq	2b	mtctr	r7	b	1b	.globl	memcmpmemcmp:	cmpwi	0,r5,0	blelr	mtctr	r5	addi	r6,r3,-1	addi	r4,r4,-11:	lbzu	r3,1(r6)	lbzu	r0,1(r4)	subf.	r3,r0,r3	bdnzt	2,1b	blr