Problem with SHL instruction

From: "vj" <spamtrap@xxxxxxxxxx>
Date: 13 Dec 2005 22:06:04 -0800

Hello group,

I am new to x86 assembly language programming. I am experiencing a
wierd problem with SHL insruction. please take a look at listing below:

mov eax, 0ffffffffH
mov cx, 20 ; shift 32 bits left

i was expecting that after last instruction the register eax will
contain 0 . however to my surprise it was still set to 0ffffffffH . It
seems that shl was completely ignored. Can you please tell me whats the
problem here or is there something aboute shl that i dont know.

Thanks in advance,
---
VJ

.

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