/* SPDX-License-Identifier: GPL-2.0-only */ /* ----------------------------------------------------------------------- * * * Copyright (C) 1991, 1992 Linus Torvalds * Copyright 2007 rPath, Inc. - All Rights Reserved * * ----------------------------------------------------------------------- */ #include <linux/linkage.h> /* * Memory copy routines */ .code16 .text SYM_FUNC_START_NOALIGN(memcpy) pushw %si pushw %di movw %ax, %di movw %dx, %si pushw %cx shrw $2, %cx rep; movsl popw %cx andw $3, %cx rep; movsb popw %di popw %si retl SYM_FUNC_END(memcpy) SYM_FUNC_START_NOALIGN(memset) pushw %di movw %ax, %di movzbl %dl, %eax imull $0x01010101,%eax pushw %cx shrw $2, %cx rep; stosl popw %cx andw $3, %cx rep; stosb popw %di retl SYM_FUNC_END(memset) SYM_FUNC_START_NOALIGN(copy_from_fs) pushw %ds pushw %fs popw %ds calll memcpy popw %ds retl SYM_FUNC_END(copy_from_fs) SYM_FUNC_START_NOALIGN(copy_to_fs) pushw %es pushw %fs popw %es calll memcpy popw %es retl SYM_FUNC_END(copy_to_fs)
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