[mirror_ubuntu-hirsute-kernel.git] / arch / arm / lib / io-writesl.S

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  linux/arch/arm/lib/io-writesl.S
 *
 *  Copyright (C) 1995-2000 Russell King
 */
#include <linux/linkage.h>
#include <asm/assembler.h>

ENTRY(__raw_writesl)
		teq	r2, #0		@ do we have to check for the zero len?
		reteq	lr
		ands	ip, r1, #3
		bne	3f

		subs	r2, r2, #4
		bmi	2f
		stmfd	sp!, {r4, lr}
1:		ldmia	r1!, {r3, r4, ip, lr}
		subs	r2, r2, #4
		str	r3, [r0, #0]
		str	r4, [r0, #0]
		str	ip, [r0, #0]
		str	lr, [r0, #0]
		bpl	1b
		ldmfd	sp!, {r4, lr}
2:		movs	r2, r2, lsl #31
		ldmiacs	r1!, {r3, ip}
		strcs	r3, [r0, #0]
		ldrne	r3, [r1, #0]
		strcs	ip, [r0, #0]
		strne	r3, [r0, #0]
		ret	lr

3:		bic	r1, r1, #3
		ldr	r3, [r1], #4
		cmp	ip, #2
		blt	5f
		bgt	6f

4:		mov	ip, r3, lspull #16
		ldr	r3, [r1], #4
		subs	r2, r2, #1
		orr	ip, ip, r3, lspush #16
		str	ip, [r0]
		bne	4b
		ret	lr

5:		mov	ip, r3, lspull #8
		ldr	r3, [r1], #4
		subs	r2, r2, #1
		orr	ip, ip, r3, lspush #24
		str	ip, [r0]
		bne	5b
		ret	lr

6:		mov	ip, r3, lspull #24
		ldr	r3, [r1], #4
		subs	r2, r2, #1
		orr	ip, ip, r3, lspush #8
		str	ip, [r0]
		bne	6b
		ret	lr
ENDPROC(__raw_writesl)
Commit	Line	Data
d2912cb1	1	/* SPDX-License-Identifier: GPL-2.0-only */
1da177e4 LT	2	/*
	3	* linux/arch/arm/lib/io-writesl.S
	4	*
	5	* Copyright (C) 1995-2000 Russell King
1da177e4 LT	6	*/
	7	#include <linux/linkage.h>
	8	#include <asm/assembler.h>
	9
	10	ENTRY(__raw_writesl)
	11	teq r2, #0 @ do we have to check for the zero len?
6ebbf2ce	12	reteq lr
1da177e4 LT	13	ands ip, r1, #3
	14	bne 3f
	15
	16	subs r2, r2, #4
	17	bmi 2f
	18	stmfd sp!, {r4, lr}
	19	1: ldmia r1!, {r3, r4, ip, lr}
	20	subs r2, r2, #4
	21	str r3, [r0, #0]
	22	str r4, [r0, #0]
	23	str ip, [r0, #0]
	24	str lr, [r0, #0]
	25	bpl 1b
	26	ldmfd sp!, {r4, lr}
	27	2: movs r2, r2, lsl #31
e44fc388	28	ldmiacs r1!, {r3, ip}
1da177e4 LT	29	strcs r3, [r0, #0]
	30	ldrne r3, [r1, #0]
	31	strcs ip, [r0, #0]
	32	strne r3, [r0, #0]
6ebbf2ce	33	ret lr
1da177e4 LT	34
	35	3: bic r1, r1, #3
	36	ldr r3, [r1], #4
	37	cmp ip, #2
	38	blt 5f
	39	bgt 6f
	40
d98b90ea	41	4: mov ip, r3, lspull #16
1da177e4 LT	42	ldr r3, [r1], #4
1da177e4 LT	43	subs r2, r2, #1
d98b90ea	44	orr ip, ip, r3, lspush #16
1da177e4 LT	45	str ip, [r0]
1da177e4 LT	46	bne 4b
6ebbf2ce	47	ret lr
1da177e4	48
d98b90ea	49	5: mov ip, r3, lspull #8
1da177e4 LT	50	ldr r3, [r1], #4
1da177e4 LT	51	subs r2, r2, #1
d98b90ea	52	orr ip, ip, r3, lspush #24
1da177e4 LT	53	str ip, [r0]
1da177e4 LT	54	bne 5b
6ebbf2ce	55	ret lr
1da177e4	56
d98b90ea	57	6: mov ip, r3, lspull #24
1da177e4 LT	58	ldr r3, [r1], #4
1da177e4 LT	59	subs r2, r2, #1
d98b90ea	60	orr ip, ip, r3, lspush #8
1da177e4 LT	61	str ip, [r0]
1da177e4 LT	62	bne 6b
6ebbf2ce	63	ret lr
93ed3970	64	ENDPROC(__raw_writesl)