mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
76 lines
1.4 KiB
ArmAsm
76 lines
1.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/arm/lib/io-readsl.S
|
|
*
|
|
* Copyright (C) 1995-2000 Russell King
|
|
*/
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
ENTRY(__raw_readsl)
|
|
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: ldr r3, [r0, #0]
|
|
ldr r4, [r0, #0]
|
|
ldr ip, [r0, #0]
|
|
ldr lr, [r0, #0]
|
|
subs r2, r2, #4
|
|
stmia r1!, {r3, r4, ip, lr}
|
|
bpl 1b
|
|
ldmfd sp!, {r4, lr}
|
|
2: movs r2, r2, lsl #31
|
|
ldrcs r3, [r0, #0]
|
|
ldrcs ip, [r0, #0]
|
|
stmiacs r1!, {r3, ip}
|
|
ldrne r3, [r0, #0]
|
|
strne r3, [r1, #0]
|
|
ret lr
|
|
|
|
3: ldr r3, [r0]
|
|
cmp ip, #2
|
|
mov ip, r3, get_byte_0
|
|
strb ip, [r1], #1
|
|
bgt 6f
|
|
mov ip, r3, get_byte_1
|
|
strb ip, [r1], #1
|
|
beq 5f
|
|
mov ip, r3, get_byte_2
|
|
strb ip, [r1], #1
|
|
|
|
4: subs r2, r2, #1
|
|
mov ip, r3, lspull #24
|
|
ldrne r3, [r0]
|
|
orrne ip, ip, r3, lspush #8
|
|
strne ip, [r1], #4
|
|
bne 4b
|
|
b 8f
|
|
|
|
5: subs r2, r2, #1
|
|
mov ip, r3, lspull #16
|
|
ldrne r3, [r0]
|
|
orrne ip, ip, r3, lspush #16
|
|
strne ip, [r1], #4
|
|
bne 5b
|
|
b 7f
|
|
|
|
6: subs r2, r2, #1
|
|
mov ip, r3, lspull #8
|
|
ldrne r3, [r0]
|
|
orrne ip, ip, r3, lspush #24
|
|
strne ip, [r1], #4
|
|
bne 6b
|
|
|
|
mov r3, ip, get_byte_2
|
|
strb r3, [r1, #2]
|
|
7: mov r3, ip, get_byte_1
|
|
strb r3, [r1, #1]
|
|
8: mov r3, ip, get_byte_0
|
|
strb r3, [r1, #0]
|
|
ret lr
|
|
ENDPROC(__raw_readsl)
|