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Re: PDP-10 port
Re: PDP-10 port
Thu, 13 Jun 2002 08:06:44 +0200
Gnus/5.090007 (Oort Gnus v0.07) XEmacs/21.4 (Artificial Intelligence, i386-suse-linux)
Lars Brinkhoff <address@hidden> writes:
> Andreas Jaeger <address@hidden> writes:
>> Lars Brinkhoff <address@hidden> writes:
>> > I will probably soon start working on porting glibc to the PDP-10
>> > architecture running the TOPS-20 operating system.
>> That looks like fun, I fear you need to put quite some work into it.
> Yes, that's expected.
> Do you (or anyone else) know to what extent the necessary
> modifications could be accepted back into GNU libc? To give an idea
> of the obstacles to overcome:
> * The PDP-10 is word-addressed, so there are very strict alignment
That shouldn't be a problem.
> * The word size is 36 bits, so int is 36, short 18, and char 9 bits.
> (Support for 8/16/32-bit types in the GCC port may help with this.)
I fear that this is a major problem.
> * The Linux/VAX people reports that the library expect IEEE floating
> point types, which are not supported in hardware on the PDP-10.
glibc has a Softfloating point library in soft-fp that needs to be
> Finally, anything in particular I should do to prepare myself for the
> port? Any mailing lists subscriptions recommended? I have browsed
> through the manual and the FAQ.
Subscribe to libc-alpha and try to understand the sysdeps directory.
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