Cheat Engine

[cloudzero]

So I set a break point at this instruction:

cvtsi2ss xmm0,xmm6

The first time I run this instruction
xmm0:0000000000000000 - 0000000000000000
xmm6:0000000000000000 - 0000000000000000
becomes
xmm0:000000003F800000 - 0000000000000000 or 1.00 float
xmm6:0000000000000000 - 0000000000000000

Another time I run this instruction
xmm0:0000000000000000 - 0000000000000000
xmm6:0000000000000000 - 0000000000000000
becomes
xmm0:0000000040400000 - 0000000000000000 or 3.00 float
xmm6:0000000000000000 - 0000000000000000

Now I admit I don't really know what this instruction does even after reading descriptions from google, but this behavior can't be right. Same input both times, different results. Am I missing something?

[Geri]

[cloudzero]

it don't matter that its shared code. the input xmm6 is 0 both times

[Dark Byte]

Not really sure, but from the description my guess is that it converts a 4 byte (dword) integer to a Float type value (single precision)

You say you have set a breakpoint ON that instruction? So the register state is BEFORE it gets executed ?
If so, it looks like it's going to set xmm0 to 0 (Initializing the variables to 0 is a common thing to do, although i think there is an easier method than this...) And amusing xmm0 could be anything at the time it is being initialized to 0, this does make sense