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This instruction can't be compiled[error]

 
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Guipinii
How do I cheat?
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Joined: 22 Jan 2023
Posts: 1
PostPosted: Sat Dec 23, 2023 1:48 pm    Post subject: This instruction can't be compiled[error] Reply with quote
i need help on this please
Code:
Error in line 20 (vcvtsi2ss xmm0,eax,[rsi+000005C0])
:This instruction can't be compiled


im still a newbie using CE thank you Very Happy
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ParkourPenguin
I post too much
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Joined: 06 Jul 2014
Posts: 4719
PostPosted: Sat Dec 23, 2023 3:16 pm    Post subject: Reply with quote
I don't know what you're trying to do.

`cvtsi2ss` converts a signed integer to a float. The first argument is an xmm register- it's where the float gets written to. The second argument is the source: a 32-bit register or memory location.

The AVX version `vcvtsi2ss` takes 3 arguments. The first is the same- an xmm register that gets written to. The last argument is also the same- a 32-bit register or memory location storing a signed integer.
The second argument is an xmm register. The instruction reads the second, third, and fourth float in this xmm register and writes them to the corresponding location in the destination xmm register (first argument).
pseudo-C:
Code:
vcvtsi2ss xmm0,xmm1,eax

xmm0 = {
          (float)eax,
          xmm1[1],
          xmm1[2],
          xmm1[3]
       }

If you have no idea what I'm talking about, just use the same register for the first and second arguments.
Code:
vcvtsi2ss xmm0,xmm0,[rsi+5C0]

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