barel@imag.imag.fr (Max BAREL) (07/01/88)
1: I just realized today that none of the two C compilers we have (standard V.2 and CTP, both for 32k), feature the "-f" option (compile and link for no FPU). A quick look in the libraries showed no floating math functions. We are considering to use the 32CG016 in an industrial design without FPU (not a CMOS chip ). The "undefined" trap could help but need to write the code interpreter/ emulator. Any suggestions ? 2: Talking of 32CG016, what are REALISTIC availability of - samples - mass production - "Splice" pseudo-emulator for CG16 ? I mean for us in Europe. Thank you. -- Max Barel barel@imag.imag.fr
yuval@taux01.UUCP (Gideon Yuval) (07/03/88)
> I just realized today that none of the two C compilers we have (standard V.2 > and CTP, both for 32k), feature the "-f" option (compile and link for no FPU). > A quick look in the libraries showed no floating math functions. > > We are considering to use the 32CG016 in an industrial design without FPU (not a > CMOS chip ). > > The "undefined" trap could help but need to write the code interpreter/ > emulator. Two ways out: (1) NSC's FPS (Floating Point Simulator) is now a product. It emulates the 32081/381/580 bit-for-bit, & is therefore slower than ... (2) U.S. Software (Portland, Oregon) have a S/W floating-point library which, on the 386, beats 287 HARDWARE speed. If they have a 32K version (or if you convert their 386 code to 532 - their source-code sells for $1250), you should get a pretty fast S/W FP package. NOT bit-compatible with 081/381/580 results -- you pays your money & you takes your choice. -- Gideon Yuval, yuval@taux01.nsc.com, +972-2-690992 (home) ,-52-522255(work) Paper-mail: National Semiconductor, 6 Maskit St., Herzliyah, Israel (alternative E-mail address: decwrl!nsc!taux01!yuval@uunet.uu.net)
yuval@taux01.UUCP (Gideon Yuval) (07/03/88)
> We are considering to use the 32CG016 in an industrial design without FPU (not a > CMOS chip ). If CMOS, rather than S/W, is the issue: both the 32381 FPU, and the 32580 FPC (a coupler to Weitek's 3164) are CMOS. The 381 is appreciably faster than the 081, and the 580/3164 runs like a bat out of hell. -- Gideon Yuval, yuval@taux01.nsc.com, +972-2-690992 (home) ,-52-522255(work) Paper-mail: National Semiconductor, 6 Maskit St., Herzliyah, Israel (alternative E-mail address: decwrl!nsc!taux01!yuval@uunet.uu.net)