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- Path: sparky!uunet!charon.amdahl.com!amdahl!garyf
- From: garyf@uts.amdahl.com (Gary Faulkner)
- Newsgroups: comp.os.linux
- Subject: Linux 0.99 FPU question
- Summary: where does linux detect fpu??
- Keywords: LINUX, FPU
- Message-ID: <89Rz03zHc40w00@amdahl.uts.amdahl.com>
- Date: 18 Dec 92 05:27:54 GMT
- References: <1992Dec18.000355.18823@klaava.Helsinki.FI>
- Organization: Amdahl Corporation, Sunnyvale CA
- Lines: 32
-
- Hello all,
-
- After finally getting 0.99 up (and STILL running!!), I now have a
- fairly big question, related to how I got 0.99 up.
-
- First, I had to rebuild my kernel with FPU-emulation in, even though
- I have a 486-DX (i.e., I have a real FPU). Once I did that (actually,
- the only change I made), the 0.99 kernel came right up.
-
- So, I am left with the question...why?? I read somewhere that even if
- you have FPU emulation in the kernel, that Linux will only use it if
- there isn't a real FPU. When does it detect the FPU (source file
- would be fine...if it really is in 808x6 assembler, I'll just get the
- old assembler book out and figure out what it is doing)????
-
- Even better, does anyone have an idea about why I am having to have
- FPU emulation in my kernel? I realize that not many people (guessing
- here) have 486's running linux, but if so, has anyone else tried NOT
- including the FPU-emu stuff in their kernel?
-
- I'd hate to think that I'm using the FPU-emu when I *really* don't
- have to.
-
- Thanks!!
-
- --
- Gary Faulkner -- My views are no more Amdahl's than Amdahl's views are mine.
-
- Brought to you by the letter 'G'.
-
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