[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: PDP-10 port

From: Andreas Jaeger
Subject: Re: PDP-10 port
Date: Thu, 13 Jun 2002 08:06:44 +0200
User-agent: 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
>   requirements.

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.

If you like to get your contributions into glibc, we need a copyright

 Andreas Jaeger
  SuSE Labs address@hidden
   private address@hidden

reply via email to

[Prev in Thread] Current Thread [Next in Thread]