Text File

Aucbvax.5154 fa.unix-wizards utzoo!decvax!ucbvax!unix-wizards Thu Nov 12 23:28:20 1981 Re: i/d fp simulator >From JNC@MIT-XX Thu Nov 12 22:50:24 1981 With a standard machine running I/D, there is no way to look at the faulted instruction in user mode. There are two ways to fix this; one is to hack the processor so that user MFPI works, the other is to add a system call to do the equivalent. We have an fp1.s that uses the system call, and we are using that at the moment, but I am just about (this morning) to implement the MFPI fix. If you want, I can tell you what to do. If you want the code, let me know. Does anyone have an fp1.s that does the lookahead optimization? I tried doing it, and it seemed to work, but after a while it blows up, and I can't figure out why. Noel -------

----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen <jgoerzen@complete.org> of http://communication.ucsd.edu/A-News/

This Usenet Oldnews Archive article may be copied and distributed freely, provided:

1. There is no money collected for the text(s) of the articles.

2. The following notice remains appended to each copy:

The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.