How can I do these operations in C?

Posted by Juan Antonio on Stack Overflow See other posts from Stack Overflow or by Juan Antonio
Published on 2010-05-03T20:05:11Z Indexed on 2010/05/03 20:08 UTC
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Hello, I'm converting some assembly code to C to be able to use it with the current compiler environment I have to work with.

I've reached 2 operations I don't know how to translate to C. Anyone know how to do it?

In both, offset is an unsigned 32-bit integer and shift is a signed integer value. C_FLAG is a bool.

OP1:

__asm {
    __asm mov ecx, shift
    __asm ror offset, cl
}

OP2:

__asm {
    __asm bt dword ptr C_FLAG, 0
    __asm rcr offset, 1
}

Thank you very much for your expertise.

P.S.: I'm not the original developer, nor I have seen many x86 assembly code...

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