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ja instruction problem.

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Freiza
Grandmaster Cheater

Reputation: 22

Joined: 28 Jun 2010
Posts: 662

Posted: Mon Mar 05, 2012 9:42 am Post subject: ja instruction problem.

Code:

shl eax,2
cmp eax,#250
ja one
mov dword ptr [01312134],#250
jmp returnhere
one:

Even when eax is 288 it is not taking jump. Why?

http://youtu.be/rnRltku8HTw

Video attached.

Dark Byte
Site Admin

Reputation: 473

Joined: 09 May 2003
Posts: 25907
Location: The netherlands

Posted: Mon Mar 05, 2012 9:58 am Post subject:

according to the docs:

Quote:

When an immediate value is used as an operand, it is sign-extended to the length of the first operand

meaning it's a signed compare

try cmp eax,000000fa

I'll probably have to adjust this instruction's assembly to pick the bigger size version when the value is 128+
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Freiza
Grandmaster Cheater

Reputation: 22

Joined: 28 Jun 2010
Posts: 662

Posted: Mon Mar 05, 2012 10:13 am Post subject:

Now working correctly. Thank You.

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