mirror of https://github.com/nmlgc/ReC98.git
34 lines
521 B
NASM
34 lines
521 B
NASM
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; void *__cdecl memcpy(void *dst, const void *src, size_t n)
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_memcpy proc DIST
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@@dst = DPTR_ 2 + dPtrSize
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@@src = DPTR_ 2 + (dPtrSize * 2)
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@@n = word ptr 2 + (dPtrSize * 3)
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push bp
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mov bp, sp
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push si
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push di
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if LDATA
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mov dx, ds
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endif
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LES_ di, [bp+@@dst]
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LDS_ si, [bp+@@src]
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mov cx, [bp+@@n]
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shr cx, 1
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cld
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rep movsw
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jnb short @@cpy_end
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movsb
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@@cpy_end:
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if LDATA
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mov ds, dx
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endif
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mov dx, word ptr [bp+@@dst+2]
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mov ax, word ptr [bp+@@dst]
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pop di
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pop si
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pop bp
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ret
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_memcpy endp
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