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What does these instructions means

 
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vergilganesh
Expert Cheater
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Joined: 01 Jul 2013
Posts: 134
Location: India
PostPosted: Wed Jul 31, 2013 4:50 am    Post subject: What does these instructions means Reply with quote
I am trying to make a superjump hack in SHANK 2. And I found the correct address. Then I do what accesses this addresses and i got this pair.
Code:

cvtss2sd xmm1,[ecx+04]
movss [edx+04],xmm0

for more info see the img. What actually the code does

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shank.jpg
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birdfreeyahoo
How do I cheat?
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Joined: 31 Jul 2013
Posts: 2
PostPosted: Wed Jul 31, 2013 11:55 am    Post subject: Reply with quote
The first opcode:

Command cvtss2sd:

ConVerT Scalar Single-precision TO Scalar Double.

Simply means, the address in ecx + 4, its value is converted from float to double and is stored in xmm1.

Command movss:

MOV Scalar Single

Moves a float from xmm0 to the value of edx+4.


Google could have helped you.
greetz
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