48 lines
1.5 KiB
NASM
48 lines
1.5 KiB
NASM
; Copyright (C) 2025 Elaina Claus
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;
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation, either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <https://www.gnu.org/licenses/>.
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%ifndef __INC_KMEMCPY5_FUNC
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%include 'cdecl16.inc'
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; uint8_t* kmemset(word dest_segment, word dest, word src_segment, word src, byte len);
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; not overlap safe, only for
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ALIGN 4, db 0x90
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kmemcpy5:
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__CDECL16_PROC_ENTRY
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push ds
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push es
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.setup_segments:
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mov ax, [bp + 4]
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mov ds, ax ; destination segment
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mov ax, [ bp + 8]
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mov es, ax ; source segment
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.func:
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mov cx, [bp + 12] ; len
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mov si, [bp + 10] ; src
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mov di, [bp + 6] ; dest
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cld ; ensure we are incrementing
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rep movsb ; move ds:si -> es:di
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mov ax, di ; return pointer to dest
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.restore_segments:
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pop es
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pop ds
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.endf:
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__CDECL16_PROC_EXIT
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ret
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%define __INC_KMEMCPY5_FUNC
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%endif |