forked from KolibriOS/kolibrios
54 lines
802 B
NASM
54 lines
802 B
NASM
format ELF
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section '.text' executable
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include 'proc32.inc'
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public memcpy
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public memmove
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proc memcpy c, to:dword,from:dword,count:dword
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push esi
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push edi
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mov ecx,[count]
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test ecx,ecx
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jz no_copy_block
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mov esi,[from]
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mov edi,[to]
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cld
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rep movsb
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no_copy_block:
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pop edi
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pop esi
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mov eax, [to]
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ret
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endp
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proc memmove c, to:dword,from:dword,count:dword
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push esi
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push edi
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mov ecx,[count]
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test ecx,ecx
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jz no_copy_block_
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mov esi,[from]
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mov edi,[to]
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cmp esi, edi
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je no_copy_block_
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jg copy_
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add esi, ecx
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add edi, ecx
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dec esi
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dec edi
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std
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copy_:
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rep movsb
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cld
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no_copy_block_:
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pop edi
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pop esi
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mov eax,[to]
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ret
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endp
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