/* * Copyright (C) Paul Mackerras 1997. * * 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. * * NOTE: this code runs in 32 bit mode and is packaged as ELF32. */ #include "ppc_asm.h" 	.text	.globl	strcpystrcpy:	addi	r5,r3,-1	addi	r4,r4,-11:	lbzu	r0,1(r4)	cmpwi	0,r0,0	stbu	r0,1(r5)	bne	1b	blr 	.globl	strncpystrncpy:	cmpwi	0,r5,0	beqlr	mtctr	r5	addi	r6,r3,-1	addi	r4,r4,-11:	lbzu	r0,1(r4)	cmpwi	0,r0,0	stbu	r0,1(r6)	bdnzf	2,1b		/* dec ctr, branch if ctr != 0 && !cr0.eq */	blr 	.globl	strcatstrcat:	addi	r5,r3,-1	addi	r4,r4,-11:	lbzu	r0,1(r5)	cmpwi	0,r0,0	bne	1b	addi	r5,r5,-11:	lbzu	r0,1(r4)	cmpwi	0,r0,0	stbu	r0,1(r5)	bne	1b	blr 	.globl	strchrstrchr:	addi	r3,r3,-11:	lbzu	r0,1(r3)	cmpw	0,r0,r4	beqlr	cmpwi	0,r0,0	bne	1b	li	r3,0	blr 	.globl	strcmpstrcmp:	addi	r5,r3,-1	addi	r4,r4,-11:	lbzu	r3,1(r5)	cmpwi	1,r3,0	lbzu	r0,1(r4)	subf.	r3,r0,r3	beqlr	1	beq	1b	blr 	.globl	strncmpstrncmp:	mtctr	r5	addi	r5,r3,-1	addi	r4,r4,-11:	lbzu	r3,1(r5)	cmpwi	1,r3,0	lbzu	r0,1(r4)	subf.	r3,r0,r3	beqlr	1	bdnzt	eq,1b	blr 	.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		/* r7 = r5 >> 3 */	addi	r6,r3,-4	addi	r4,r4,-4	beq	3f			/* if less than 8 bytes to do */	andi.	r0,r6,3			/* get dest word aligned */	mtctr	r7	bne	5f	andi.	r0,r4,3			/* check src word aligned too */	bne	3f1:	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	cmpw	cr1,r0,r5	add	r7,r0,r4	andi.	r7,r7,3			/* will source be word-aligned too? */	ble	cr1,3b	bne	3b			/* do byte-by-byte if not */	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		/* r7 = r5 >> 3 */	add	r6,r3,r5	add	r4,r4,r5	beq	3f	andi.	r0,r6,3	mtctr	r7	bne	5f	andi.	r0,r4,3	bne	3f1:	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:	cmpw	cr1,r0,r5	subf	r7,r0,r4	andi.	r7,r7,3	ble	cr1,3b	bne	3b	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	memchrmemchr:	cmpwi	0,r5,0	blelr	mtctr	r5	addi	r3,r3,-11:	lbzu	r0,1(r3)	cmpw	r0,r4	beqlr	bdnz	1b	li	r3,0	blr 	.globl	memcmpmemcmp:	cmpwi	0,r5,0	ble	2f	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	blr2:	li	r3,0	blr  /* * Flush the dcache and invalidate the icache for a range of addresses. * * flush_cache(addr, len) */	.global	flush_cacheflush_cache:	addi	4,4,0x1f	/* len = (len + 0x1f) / 0x20 */	rlwinm.	4,4,27,5,31	mtctr	4	beqlr1:	dcbf	0,3	icbi	0,3	addi	3,3,0x20	bdnz	1b	sync	isync	blr