53 lines
1.9 KiB
PHP
53 lines
1.9 KiB
PHP
; Copyright (c) 2024 Elaina Claus
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this software and associated documentation files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in all
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; copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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; SOFTWARE.
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; uint8_t* kmemset(void* dest, uint8_t val, size_t len);
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kmemset:
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push di ; function uses di, so save it.
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mov cx, [bp - 2] ; size_t len
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mov al, [bp - 4] ; uint8_t val
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mov di, [bp - 6] ; void * ptr
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cld
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rep stosb
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.endf:
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mov ax, [bp - 6] ; return pointer to dest
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pop di ; restore di
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ret
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; uint8_t* kmemset(uint8_t* dest, uint8_t* src, size_t len);
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; not overlap safe
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kmemcpy:
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push di
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push si ; di, si are callee save
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mov cx, [bp - 2] ; length
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mov si, [bp - 4] ; source
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mov di, [bp - 6] ; dest
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cld ; ensure we are incrementing
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rep movsb
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.endf:
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mov ax, [bp - 6] ; return pointer to dest
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pop si
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pop di
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ret |