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Date:      Tue, 3 Nov 1998 09:30:01 -0800 (PST)
From:      Robert Swindells <swindellsr@genrad.co.uk>
To:        nate@mt.sri.com
Cc:        malte.lance@gmx.net, freebsd-java@FreeBSD.ORG
Subject:   Re: JIT on FreeBSD
Message-ID:  <199811031730.JAA09678@hub.freebsd.org>
In-Reply-To: <199811031526.IAA09105@mt.sri.com> (message from Nate Williams on Tue, 3 Nov 1998 08:26:53 -0700)

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>> >> Does anyone know where I can find a JIT for JDK1.1.6 (or tell me there
>> >> isn't one yet...)?
>> > 
>> > There isn't one for unix.
>> 
>> c't 21, 12.10. - 25.10.98, p. 63 (bottom right):
>> "JIT-Sources available
>>  MetroWerks has published the source-code of their
>>  CodeWarrior Just in Time Compiler (JIT) for Linux/PowerPC

>This is for the PPC, not for x86. :(

What the MetroWerks JIT would give on the x86 is the basic JIT entry
point functions, support for throwing out sequences of instructions to
memory and a big empty switch statement for interpreting the Java
opcodes.

Someone would need to fill in the blanks in the switch statement with
the x86 specific instructions.


You had asked a while back how I was getting on with Tya.

I got it to compile without too much difficulty. The problems since
then have been in identifying the Linux specific assumptions, such as
what address things will get allocated at.

I think the authors know what they are doing, they just don't have any
idea about writing maintainable (or portable) code.

I can put a snapshot somewhere if anyone wants to look at it.

Robert Swindells



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