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I've seen pseudocode of this form in the Montgomery multiplication related theses: $(C, S) := a[j]*b[0]+C$.

What's the meaning of "$(C, S):=$", or what is the real code that was converted from this pseudocode like?

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I believe that the meaning is "compute the $2n$-bit value $a[j]*b[0] + C$, and then assign the top $n$ bits to $C$ and the bottom $n$ bits into $S$

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  • $\begingroup$ @user3042720: if that answers the question, could you accept it (and possibly upvote it)? Thanks! $\endgroup$
    – poncho
    Jul 3 '15 at 20:34

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