Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ucbvax.ARPA Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!arpa-bboard From: arpa-bboard@ucbvax.ARPA Newsgroups: fa.arpa-bboard Subject: Math Optimizations Message-ID: <5305@ucbvax.ARPA> Date: Thu, 7-Mar-85 03:32:54 EST Article-I.D.: ucbvax.5305 Posted: Thu Mar 7 03:32:54 1985 Date-Received: Fri, 8-Mar-85 04:13:21 EST Sender: daemon@ucbvax.ARPA Organization: University of California at Berkeley Lines: 14 From: Jerry.Brookshire@CMU-CS-A.ARPA In a missile-flight-control application (autopilot), we are using Intel 8086/8087's to solve filter equations in software written in PL/M, with library calls to CEL87.LIB for valu{s involving SIN, COS, ATAN and ASIN, plus square roots. The run-time constraints were so severe that we initially used the libraries to build tables prior to launch , and then used table lookups during flight to enable everything to get done. But now we are running out of memory space, and need to reduce current usage, so we are considering alternative algorithms to address this issue. Does anyone have any suggestions re: what Intel uses in the library, or previous experience with similar problems. Any help greatly appreciated. Jerry.Brookshire@cmu-cs-10A