1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  linux/arch/arm/lib/io-writesw-armv4.S
 4 *
 5 *  Copyright (C) 1995-2000 Russell King
 
 
 
 
 6 */
 7#include <linux/linkage.h>
 8#include <asm/assembler.h>
 9
10		.macro	outword, rd
11#ifndef __ARMEB__
12		strh	\rd, [r0]
13		mov	\rd, \rd, lsr #16
14		strh	\rd, [r0]
15#else
16		mov	lr, \rd, lsr #16
17		strh	lr, [r0]
18		strh	\rd, [r0]
19#endif
20		.endm
21
22.Loutsw_align:	movs	ip, r1, lsl #31
23		bne	.Loutsw_noalign
24
25		ldrh	r3, [r1], #2
26		sub	r2, r2, #1
27		strh	r3, [r0]
28
29ENTRY(__raw_writesw)
30		teq	r2, #0
31		reteq	lr
32		ands	r3, r1, #3
33		bne	.Loutsw_align
34
35		stmfd	sp!, {r4, r5, lr}
36
37		subs	r2, r2, #8
38		bmi	.Lno_outsw_8
39
40.Loutsw_8_lp:	ldmia	r1!, {r3, r4, r5, ip}
41		subs	r2, r2, #8
42		outword	r3
43		outword	r4
44		outword	r5
45		outword	ip
46		bpl	.Loutsw_8_lp
47
48.Lno_outsw_8:	tst	r2, #4
49		beq	.Lno_outsw_4
50
51		ldmia	r1!, {r3, ip}
52		outword	r3
53		outword	ip
54
55.Lno_outsw_4:	movs	r2, r2, lsl #31
56		bcc	.Lno_outsw_2
57
58		ldr	r3, [r1], #4
59		outword	r3
60
61.Lno_outsw_2:	ldrhne	r3, [r1]
62		strhne	r3, [r0]
63
64		ldmfd	sp!, {r4, r5, pc}
65
66#ifdef __ARMEB__
67#define pull_hbyte0	lsl #8
68#define push_hbyte1	lsr #24
69#else
70#define pull_hbyte0	lsr #24
71#define push_hbyte1	lsl #8
72#endif
73
74.Loutsw_noalign:
75 ARM(		ldr	r3, [r1, -r3]!	)
76 THUMB(		rsb	r3, r3, #0	)
77 THUMB(		ldr	r3, [r1, r3]	)
78 THUMB(		sub	r1, r3		)
79		subcs	r2, r2, #1
80		bcs	2f
81		subs	r2, r2, #2
82		bmi	3f
83
841:		mov	ip, r3, lsr #8
85		strh	ip, [r0]
862:		mov	ip, r3, pull_hbyte0
87		ldr	r3, [r1, #4]!
88		subs	r2, r2, #2
89		orr	ip, ip, r3, push_hbyte1
90		strh	ip, [r0]
91		bpl	1b
92
93		tst	r2, #1
943:		movne	ip, r3, lsr #8
95		strhne	ip, [r0]
96		ret	lr
97ENDPROC(__raw_writesw)

 
  1/*
  2 *  linux/arch/arm/lib/io-writesw-armv4.S
  3 *
  4 *  Copyright (C) 1995-2000 Russell King
  5 *
  6 * This program is free software; you can redistribute it and/or modify
  7 * it under the terms of the GNU General Public License version 2 as
  8 * published by the Free Software Foundation.
  9 */
 10#include <linux/linkage.h>
 11#include <asm/assembler.h>
 12
 13		.macro	outword, rd
 14#ifndef __ARMEB__
 15		strh	\rd, [r0]
 16		mov	\rd, \rd, lsr #16
 17		strh	\rd, [r0]
 18#else
 19		mov	lr, \rd, lsr #16
 20		strh	lr, [r0]
 21		strh	\rd, [r0]
 22#endif
 23		.endm
 24
 25.Loutsw_align:	movs	ip, r1, lsl #31
 26		bne	.Loutsw_noalign
 27
 28		ldrh	r3, [r1], #2
 29		sub	r2, r2, #1
 30		strh	r3, [r0]
 31
 32ENTRY(__raw_writesw)
 33		teq	r2, #0
 34		moveq	pc, lr
 35		ands	r3, r1, #3
 36		bne	.Loutsw_align
 37
 38		stmfd	sp!, {r4, r5, lr}
 39
 40		subs	r2, r2, #8
 41		bmi	.Lno_outsw_8
 42
 43.Loutsw_8_lp:	ldmia	r1!, {r3, r4, r5, ip}
 44		subs	r2, r2, #8
 45		outword	r3
 46		outword	r4
 47		outword	r5
 48		outword	ip
 49		bpl	.Loutsw_8_lp
 50
 51.Lno_outsw_8:	tst	r2, #4
 52		beq	.Lno_outsw_4
 53
 54		ldmia	r1!, {r3, ip}
 55		outword	r3
 56		outword	ip
 57
 58.Lno_outsw_4:	movs	r2, r2, lsl #31
 59		bcc	.Lno_outsw_2
 60
 61		ldr	r3, [r1], #4
 62		outword	r3
 63
 64.Lno_outsw_2:	ldrneh	r3, [r1]
 65		strneh	r3, [r0]
 66
 67		ldmfd	sp!, {r4, r5, pc}
 68
 69#ifdef __ARMEB__
 70#define pull_hbyte0	lsl #8
 71#define push_hbyte1	lsr #24
 72#else
 73#define pull_hbyte0	lsr #24
 74#define push_hbyte1	lsl #8
 75#endif
 76
 77.Loutsw_noalign:
 78 ARM(		ldr	r3, [r1, -r3]!	)
 79 THUMB(		rsb	r3, r3, #0	)
 80 THUMB(		ldr	r3, [r1, r3]	)
 81 THUMB(		sub	r1, r3		)
 82		subcs	r2, r2, #1
 83		bcs	2f
 84		subs	r2, r2, #2
 85		bmi	3f
 86
 871:		mov	ip, r3, lsr #8
 88		strh	ip, [r0]
 892:		mov	ip, r3, pull_hbyte0
 90		ldr	r3, [r1, #4]!
 91		subs	r2, r2, #2
 92		orr	ip, ip, r3, push_hbyte1
 93		strh	ip, [r0]
 94		bpl	1b
 95
 96		tst	r2, #1
 973:		movne	ip, r3, lsr #8
 98		strneh	ip, [r0]
 99		mov	pc, lr
100ENDPROC(__raw_writesw)