CODEWITHSUNDEEP
assemblyssesse3
Manuel Minguez
Manuel Minguez

Reputation: 31

How to use vectors in assembly code x86 and SSE

I don't know how to access a stl vector in x86. I have tried to do it like that but I have some errors.

mov ebx, stl_vector 
mov eax, [ebx] ;Here I want to store the first element of the vector
mov edx, [ebx + 4] ; I want to store the second element of the vector

I want to do the same in SSE language.

Thank you in advance!

Upvotes: 0

Views: 3462

Answers (1)

Jester
Jester

Reputation: 58762

stl vectors are objects. Unless you know the exact class layout you can't access them directly. You should probably pass a pointer to the array and a size separately to your assembly function, e.g. asm(vector.data(), vector.size()) so the compiler takes care of the c++ stuff.

Upvotes: 4

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