Re: [f-cpu] Some answer

[Just an Illusion <illusion_to_net@yahoo.fr>]

(No more than 246 mails left ;-P)

nico wrote:

 >Argh ! 92 messages !
 >
 >Define a generic representation of code to write different compiler are
 >very hard. The big example is why gcc couldn't produice an output in
 >java byte code. JVM are simply a "virtual processor", so it will be nice
 >that gcc could compile for this target. But it's a stack machine not a
 >register based one. And the semantic of the intermediate representation
 >are too poor to be used.
 >
 >Our register set is definitely 3r 2W, i don't like it too much for
 >performance reason but why using it better. One off the main problem are
 >exepntion handler. Couldn't it be possible to use the second register to
 >output the state without traping (imagine the DIV instruction, the
 >second register will say if a div by zero occur or an overflow
 >occur,...). If the system need a trap an instruction should verify the
 >regiter otherwise it could do nothing. What do you think of it ?
 >
 >For the floating point unit, we should provid 128 bits extended floating
 >point precision for the day of the register set will double.
 >
 >What about written a asm optimiser which could be used as backend for
 >every different language compiler ?
 >
 >VHDL could never be used to write SW. It's too poor !  IO fonction are
 >too poor.
 >
I'm agree, i'm agree...too

 >Nowdays HW world try to find an other way to code to a higher
 >level. SystemC are the best canditate (C++ + a lib), but there is other
 >proposal (VHDL-OO, UML-RT, new langage...)
 >
But I am not sure than SystemC is really the *new* hw system level
description language (too early to know), it have some initiative but
nothing is clear.

 >
 >
 >read you soon !
 >
 >nicO
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I'll continue my reading.
Just an Illusion


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