Chuck_M_Grandgent@cup.portal.com (02/05/89)
I'm look for leads on "C" source for doing simple arithmetic efficiently with "double longs" - that is, I need twice the integer precision of a long, and for Intel chip architecture to boot (not a bad idea - 'to boot' Intel arch.). Reals just don't hack it for what I need to do. "dlong" add and subtract are pretty trivial, you could maintain two longs and do the carry/borrow yourself, but multiply and divide appear more difficult to do efficiently. If had "dlongs" could get nice precision (by doing appropriate scaling) without attendant complications of floating point packages. ============================================================= sun!portal!cup.portal.com!chuck_m_grandgent K1OM AEG Modicon Industrial Automation Systems Group North Andover, Mass. ========================================================