How to determine if memory is aligned?

Question

I am new to optimizing code with SSE/SSE2 instructions and until now I have not gotten very far. To my knowledge a common SSE-optimized function would look like this:

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Answer 1

Other answers suggest an AND operation with low bits set, and comparing to zero.

But a more straight-forward test would be to do a MOD with the desired alignment value, and compare to zero.

#define ALIGNMENT_VALUE     16u

if (((uintptr_t)ptr % ALIGNMENT_VALUE) == 0)
{
    // ptr is aligned
}