2014-10-22 11:45:02 +00:00
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; unsigned long __cdecl _lrotr(unsigned long val, int rotate_count)
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2014-11-05 17:20:02 +00:00
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__lrotr proc
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2014-10-22 11:45:02 +00:00
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@@val = dword ptr (cPtrSize + 2)
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@@rotate_count = word ptr (cPtrSize + 2 + 4)
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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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mov ax, word ptr [bp+@@val]
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mov dx, word ptr [bp+@@val+2]
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mov cx, [bp+@@rotate_count]
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and cx, 1Fh
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jz short @@Rotated
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@@Rotating:
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mov bx, dx
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shr bx, 1
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rcr ax, 1
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rcr dx, 1
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loop @@Rotating
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@@Rotated:
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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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__lrotr endp
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