Blame - arch/x86/boot/copy.S - linux

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Thomas Gleixner	97873a3	2019-06-04 10:11:30 +0200	[diff] [blame]	1	/* SPDX-License-Identifier: GPL-2.0-only */
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	2	/* ----------------------------------------------------------------------- *
				3	*
				4	* Copyright (C) 1991, 1992 Linus Torvalds
				5	* Copyright 2007 rPath, Inc. - All Rights Reserved
				6	*
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	7	* ----------------------------------------------------------------------- */
				8
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	9	#include <linux/linkage.h>
				10
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	11	/*
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	12	* Memory copy routines
				13	*/
				14
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	15	.code16
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	16	.text
				17
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	18	SYM_FUNC_START_NOALIGN(memcpy)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	19	pushw %si
				20	pushw %di
				21	movw %ax, %di
				22	movw %dx, %si
				23	pushw %cx
				24	shrw $2, %cx
				25	rep; movsl
				26	popw %cx
				27	andw $3, %cx
				28	rep; movsb
				29	popw %di
				30	popw %si
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	31	retl
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	32	SYM_FUNC_END(memcpy)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	33
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	34	SYM_FUNC_START_NOALIGN(memset)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	35	pushw %di
				36	movw %ax, %di
				37	movzbl %dl, %eax
				38	imull $0x01010101,%eax
				39	pushw %cx
				40	shrw $2, %cx
				41	rep; stosl
				42	popw %cx
				43	andw $3, %cx
				44	rep; stosb
				45	popw %di
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	46	retl
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	47	SYM_FUNC_END(memset)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	48
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	49	SYM_FUNC_START_NOALIGN(copy_from_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	50	pushw %ds
				51	pushw %fs
				52	popw %ds
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	53	calll memcpy
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	54	popw %ds
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	55	retl
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	56	SYM_FUNC_END(copy_from_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	57
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	58	SYM_FUNC_START_NOALIGN(copy_to_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	59	pushw %es
				60	pushw %fs
				61	popw %es
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	62	calll memcpy
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	63	popw %es
David Woodhouse	e24df92	2014-01-03 22:30:42 +0000	[diff] [blame]	64	retl
Jiri Slaby	37818af	2019-10-11 13:50:56 +0200	[diff] [blame]	65	SYM_FUNC_END(copy_to_fs)