The December meeting of the 754 group was hosted by David Hough at Sun in Menlo Park on Wednesday 12/14 & Thursday 12/15 from 1:00 to 5:00. Here is the attendence list from Thursday. In future, it will be used to keep track of voting members. 754 Name Member Affiliation Email ---- ------ ----------- ----- Steven Carlough X IBM (phone) carlough@ieee.org Marius Cornea X Intel (phone) marius.cornea@intel.com Mike Cowlishaw X IBM (phone) mfc@uk.ibm.com John Crawford X Intel john.h.crawford@intel.com Bob Davis Summit Dick Delp X Self ddelp@pacbell.net Mark Erle X IBM (phone) merle@us.ibm.com J.P. Fasano IBM Alex Fit-Florea AMD ala.fit-florea@amd.com Ivan Goddard X OOTBC ivan@ootbcomp.com Roger Golliver X Intel roger.a.golliver@intel.com Michel Hack X IBM (phone) hack@watson.ibm.com John Harrison X Intel (phone) johnh@ichips.intel.com David Hough X Sun david.hough@sun.com William Kahan X U.C.Berkeley wkahan@berkeley.edu Jeff Kidder X Intel (phone) jeff.kidder@intel.com Alex Liu X Sun alex.liu@sun.com Peter Markstein X HP peter.markstein@hp.com Nobuyoshi Mori X SAP.COM (phone) nobuyoshi.mori@sap.com Stuart Oberman X Nvidia stuart@nvidia.com Jon Okada X HP jon.okada@hp.com Ian Ollmann Apple iano@apple.com Eric Postpischil Apple edp@apple.com Eric Schwarz X IBM (phone) eschwarz@us.ibm.com Ilya Sharapov Sun ilya.sharapov@sun.com Jim Shearer IBM Michael Siu Nvidia msiu@nvidia.com Peter Tang X Intel peter.tang@intel.com Jim Thomas X HP jim.thomas2@hp.com Dan Zuras X Group70 r754@nonabelian.com On Wednesday, Paul Zimmermann presented a result on a strict bound on roundoff error for complex multiply. It has some interesting & useful implications. On Thursday, Paul talked about Correctly Rounded Transcendental Functions & Arbitrary Precision. The test for correct rounding in the fast case can be done with one FMA. MPFR was developed at LORIA. He urges us to adopt both transcendentals & arbitrary precision (as well as arbitrary precision transcendentals). We have already done so, at least in part & optionally. We took our 3:00 break more or less on time. After the break we began with the new IEEE operating rules. There were sufficient objections to details that it was felt that it needed editing before we consider it again. Jeff will head a PnP subcommittee together with Jim & Mike to edit the rules for presentation at the January meeting. The Decimal Issue. Dave wanted to know if there had been any progress in the past few months. There has been a compromise proposed & Jeff & Mike are charged with writing it up for us. (All fields same width & significand different format) Dave pointed out that there is a third party on this issue, the users. Nobuyoshi supported the opinion that the users want only one format citing endianness as an example of a needless variation. He also supports database applications for which he already has a format & in which only comparison is needed. (Mike said there exists a decimal implementation in gcc.) Nobu said SAP supports Java, ABAP (an SAP language), & Cobol. While many people in the room agreed with his conclusion in principle, some felt his arguments lacked demonstrable support. Numerical Debugging Horror Stories by Prof Kahan. We ran too long to get to this but we will put it on the January agenda.