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How to subtract a value?

 
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sanduk
How do I cheat?
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Joined: 18 May 2017
Posts: 6

PostPosted: Thu May 18, 2017 2:17 pm    Post subject: How to subtract a value? Reply with quote

Friends, I need some help.

There is a value of 23.5 (float) and I need to subtract 3.5 so that the value is 20.0

Originalcode:
Movss xmm1, [rdi + 000003EC]


I can change the value to 20

Newmem:
Mov [rdi + 000003EC], (float) 20.0

But I want to decrease 3 instead of changing value ...

Can someone help me?
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STN
I post too much
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Joined: 09 Nov 2005
Posts: 2531

PostPosted: Thu May 18, 2017 2:40 pm    Post subject: Reply with quote

Learn fpu instructions

http://www.website.masmforum.com/tutorials/fptute/

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sanduk
How do I cheat?
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Joined: 18 May 2017
Posts: 6

PostPosted: Thu May 18, 2017 6:34 pm    Post subject: Reply with quote

If you gave me an example I would get a Evaluation 10
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YoucefHam
Newbie cheater
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Joined: 19 Mar 2015
Posts: 15
Location: Algeria

PostPosted: Fri May 19, 2017 12:42 am    Post subject: Reply with quote

Code:

//create variable
alloc(var,100)
registersymbol(var)
//give it a value
var:
dd (float)3

code:
  movss xmm1,[rdi+3EC]
  //this is how to sub 3 from your address
  subss xmm1,[var]
  //addss to add
  movss [rdi+3EC],xmm1
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sanduk
How do I cheat?
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Joined: 18 May 2017
Posts: 6

PostPosted: Sat May 20, 2017 12:16 pm    Post subject: Reply with quote

Worked perfectly !!!

Thank you very much !

YoucefHam wrote:
Code:

//create variable
alloc(var,100)
registersymbol(var)
//give it a value
var:
dd (float)3

code:
  movss xmm1,[rdi+3EC]
  //this is how to sub 3 from your address
  subss xmm1,[var]
  //addss to add
  movss [rdi+3EC],xmm1
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