[41604] | 1 | ; $Id: fmemcpy.asm 98103 2023-01-17 14:15:46Z vboxsync $
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| 2 | ;; @file
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| 3 | ; Compiler support routines.
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| 4 | ;
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| 5 |
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| 6 | ;
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[98103] | 7 | ; Copyright (C) 2012-2023 Oracle and/or its affiliates.
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[41604] | 8 | ;
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[96407] | 9 | ; This file is part of VirtualBox base platform packages, as
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| 10 | ; available from https://www.virtualbox.org.
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[41604] | 11 | ;
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[96407] | 12 | ; This program is free software; you can redistribute it and/or
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| 13 | ; modify it under the terms of the GNU General Public License
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| 14 | ; as published by the Free Software Foundation, in version 3 of the
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| 15 | ; License.
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| 16 | ;
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| 17 | ; This program is distributed in the hope that it will be useful, but
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| 18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | ; General Public License for more details.
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| 21 | ;
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| 22 | ; You should have received a copy of the GNU General Public License
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| 23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | ;
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| 25 | ; SPDX-License-Identifier: GPL-3.0-only
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| 26 | ;
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[41604] | 27 |
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| 28 |
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| 29 | ;*******************************************************************************
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| 30 | ;* Exported Symbols *
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| 31 | ;*******************************************************************************
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| 32 | public _fmemcpy_
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| 33 |
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| 34 |
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[60484] | 35 | .8086
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[41604] | 36 |
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| 37 | _TEXT segment public 'CODE' use16
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| 38 | assume cs:_TEXT
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| 39 |
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| 40 |
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| 41 | ;;
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[58723] | 42 | ; memcpy taking far pointers.
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[41604] | 43 | ;
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[41654] | 44 | ; cx, es may be modified; si, di are preserved
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| 45 | ;
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[41604] | 46 | ; @returns dx:ax unchanged.
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| 47 | ; @param dx:ax Pointer to the destination memory.
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| 48 | ; @param cx:bx Pointer to the source memory.
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| 49 | ; @param sp+2 The number of bytes to copy (dw).
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| 50 | ;
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| 51 | _fmemcpy_:
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| 52 | push bp
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| 53 | mov bp, sp
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| 54 | push di
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| 55 | push ds
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| 56 | push si
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| 57 |
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| 58 | mov es, dx
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| 59 | mov di, ax
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| 60 | mov ds, cx
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| 61 | mov si, bx
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| 62 | mov cx, [bp + 4]
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| 63 | rep movsb
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| 64 |
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| 65 | pop si
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| 66 | pop ds
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| 67 | pop di
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[60484] | 68 | mov sp, bp
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| 69 | pop bp
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[41604] | 70 | ret
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| 71 |
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| 72 |
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| 73 | _TEXT ends
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| 74 | end
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| 75 |
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