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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm/lib/memcpy.S
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 *  linux/arch/arm/lib/memcpy.S

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 *

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 *  Author:	Nicolas Pitre

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 *  Created:	Sep 28, 2005

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 *  Copyright:	MontaVista Software, Inc.

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 */

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#include <linux/linkage.h>

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#include <asm/assembler.h>

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#include <asm/unwind.h>

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#define LDR1W_SHIFT	0

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#define STR1W_SHIFT	0

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	.macro ldr1w ptr reg abort

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	W(ldr) \reg, [\ptr], #4

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	.endm

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	.macro ldr4w ptr reg1 reg2 reg3 reg4 abort

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	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}

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	.endm

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	.macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort

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	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}

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	.endm

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	.macro ldr1b ptr reg cond=al abort

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	ldrb\cond \reg, [\ptr], #1

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	.endm

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	.macro str1w ptr reg abort

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	W(str) \reg, [\ptr], #4

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	.endm

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	.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort

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	stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}

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	.endm

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	.macro str1b ptr reg cond=al abort

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	strb\cond \reg, [\ptr], #1

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	.endm

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	.macro enter regs:vararg

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UNWIND( .save	{r0, \regs}		)

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	stmdb sp!, {r0, \regs}

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	.endm

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	.macro exit regs:vararg

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	ldmfd sp!, {r0, \regs}

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	.endm

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	.text

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/* Prototype: void *memcpy(void *dest, const void *src, size_t n); */

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ENTRY(__memcpy)

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ENTRY(mmiocpy)

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WEAK(memcpy)

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#include "copy_template.S"

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ENDPROC(memcpy)

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ENDPROC(mmiocpy)

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ENDPROC(__memcpy)

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