* Porting GCC to 8051 Microcontroller
@ 2008-05-07 7:50 Ganesh
2008-05-07 7:57 ` Fabian Cenedese
2008-05-07 9:55 ` Andrew Haley
0 siblings, 2 replies; 8+ messages in thread
From: Ganesh @ 2008-05-07 7:50 UTC (permalink / raw)
To: gcc-help
I am planning to do GCC porting for 8051 Microcontroller.
Kindly send me the steps involved in this project.
Regards,
Ganesh
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 7:50 Porting GCC to 8051 Microcontroller Ganesh
@ 2008-05-07 7:57 ` Fabian Cenedese
2008-05-07 11:48 ` Ganesh
2008-05-07 9:55 ` Andrew Haley
1 sibling, 1 reply; 8+ messages in thread
From: Fabian Cenedese @ 2008-05-07 7:57 UTC (permalink / raw)
To: gcc-help
At 12:59 07.05.2008 +0530, Ganesh wrote:
>I am planning to do GCC porting for 8051 Microcontroller.
>Kindly send me the steps involved in this project.
Are there specific reasons to use gcc? Otherwise there are other
open source compilers like http://sdcc.sourceforge.net/
bye Fabi
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 7:50 Porting GCC to 8051 Microcontroller Ganesh
2008-05-07 7:57 ` Fabian Cenedese
@ 2008-05-07 9:55 ` Andrew Haley
2008-05-07 10:03 ` Ganesh
1 sibling, 1 reply; 8+ messages in thread
From: Andrew Haley @ 2008-05-07 9:55 UTC (permalink / raw)
To: Ganesh; +Cc: gcc-help
Ganesh wrote:
> I am planning to do GCC porting for 8051 Microcontroller.
>
> Kindly send me the steps involved in this project.
Well, if you don't understand the steps involved I don't see
why you're planning to do the port. The 8051 architecture has
a number of features that will make it very hard to generate
code with gcc.
The gccint info file has most of the info you need to do the
port.
Andrew.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 9:55 ` Andrew Haley
@ 2008-05-07 10:03 ` Ganesh
2008-05-07 10:15 ` Andrew Haley
0 siblings, 1 reply; 8+ messages in thread
From: Ganesh @ 2008-05-07 10:03 UTC (permalink / raw)
To: Andrew Haley; +Cc: gcc-help
I haven't said that I don't understand the steps involved. I have just now
started to work on it. I want to check whether if anyone have ever tried
this port and successfully completed it.
Thanks for your input (gccint info file).
----- Original Message -----
From: "Andrew Haley" <aph@redhat.com>
To: "Ganesh" <ganesh@acmet.com>
Cc: <gcc-help@gcc.gnu.org>
Sent: Wednesday, May 07, 2008 1:45 PM
Subject: Re: Porting GCC to 8051 Microcontroller
> Ganesh wrote:
>> I am planning to do GCC porting for 8051 Microcontroller.
>>
>> Kindly send me the steps involved in this project.
>
> Well, if you don't understand the steps involved I don't see
> why you're planning to do the port. The 8051 architecture has
> a number of features that will make it very hard to generate
> code with gcc.
>
> The gccint info file has most of the info you need to do the
> port.
>
> Andrew.
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 10:03 ` Ganesh
@ 2008-05-07 10:15 ` Andrew Haley
2008-05-09 10:35 ` Andrew Haley
0 siblings, 1 reply; 8+ messages in thread
From: Andrew Haley @ 2008-05-07 10:15 UTC (permalink / raw)
To: Ganesh; +Cc: gcc-help
Ganesh wrote:
> I haven't said that I don't understand the steps involved. I have just
> now started to work on it. I want to check whether if anyone have ever
> tried this port and successfully completed it.
It's very unlikely. It's not completely impossible to do it, but
code quality would probably be poor.
See http://gcc.gnu.org/ml/gcc/2003-07/msg00890.html
http://gcc.gnu.org/ml/gcc/2003-07/msg01167.html
Andrew.
>> Ganesh wrote:
>>> I am planning to do GCC porting for 8051 Microcontroller.
>>>
>>> Kindly send me the steps involved in this project.
>>
>> Well, if you don't understand the steps involved I don't see
>> why you're planning to do the port. The 8051 architecture has
>> a number of features that will make it very hard to generate
>> code with gcc.
>>
>> The gccint info file has most of the info you need to do the
>> port.
>>
>> Andrew.
>>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 7:57 ` Fabian Cenedese
@ 2008-05-07 11:48 ` Ganesh
0 siblings, 0 replies; 8+ messages in thread
From: Ganesh @ 2008-05-07 11:48 UTC (permalink / raw)
To: Fabian Cenedese; +Cc: gcc-help
When I visited a trade show last month, I found that GCC and 8051 are among
the list of hot markets. I will also check SDCC. Thanks.
Ganesh.
----- Original Message -----
From: "Fabian Cenedese" <Cenedese@indel.ch>
To: <gcc-help@gcc.gnu.org>
Sent: Wednesday, May 07, 2008 1:20 PM
Subject: Re: Porting GCC to 8051 Microcontroller
> At 12:59 07.05.2008 +0530, Ganesh wrote:
>>I am planning to do GCC porting for 8051 Microcontroller.
>>Kindly send me the steps involved in this project.
>
> Are there specific reasons to use gcc? Otherwise there are other
> open source compilers like http://sdcc.sourceforge.net/
>
> bye Fabi
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
2008-05-07 10:15 ` Andrew Haley
@ 2008-05-09 10:35 ` Andrew Haley
0 siblings, 0 replies; 8+ messages in thread
From: Andrew Haley @ 2008-05-09 10:35 UTC (permalink / raw)
To: Ganesh; +Cc: gcc-help
Andrew Haley wrote:
> Ganesh wrote:
>> I haven't said that I don't understand the steps involved. I have just
>> now started to work on it. I want to check whether if anyone have ever
>> tried this port and successfully completed it.
>
> It's very unlikely. It's not completely impossible to do it, but
> code quality would probably be poor.
>
> See http://gcc.gnu.org/ml/gcc/2003-07/msg00890.html
> http://gcc.gnu.org/ml/gcc/2003-07/msg01167.html
I've been thinking about this some more. I suspect you could get good
results by generating not 8051 assembly language, which would be gross,
but a simple bytecode engine. It wouldn't be at all fast, but it would
be possible to generate some native code sequences and intermix them
with the bytecode. This would be a reasonable compromise between speed
and code density.
Andrew.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Porting GCC to 8051 Microcontroller
@ 2008-05-09 15:28 Duane Ellis
0 siblings, 0 replies; 8+ messages in thread
From: Duane Ellis @ 2008-05-09 15:28 UTC (permalink / raw)
To: gcc-help
andrew>> I've been thinking about this some more. I
andrew>> suspect you could get good results by
andrew>> generating not 8051 assembly language,
andrew>> which would be gross, but a simple bytecode engine.
I know this for a fact :-) in a previous life we modeled
the one we did off the instruction set like the MIPS.
Why? Simple - it has to do with the way the flags
register is done.
On some CPUs - when you add "r0 + r1" => r2, you either
*must* update the flags (zero, carry, overflow) or not.
having to maintain that in a simulator is added wasteful
steps that you often do not need...
For example the test:
if( a == b ){
do_this();
}
For us the opcodes became:
test r1=r2 ;; test(r1==r2)
braf +4 ; branch if false
jsr24 do_this ; 24bit relative call.
This simplified the interpretation code and was a
huge performance win on a 6502 @ 1mhz.
The simulation engine was a big 6502 switch statement.
In effect, the 6502 was a micro-code engine :-)
-Duane.
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2008-05-09 10:35 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-05-07 7:50 Porting GCC to 8051 Microcontroller Ganesh
2008-05-07 7:57 ` Fabian Cenedese
2008-05-07 11:48 ` Ganesh
2008-05-07 9:55 ` Andrew Haley
2008-05-07 10:03 ` Ganesh
2008-05-07 10:15 ` Andrew Haley
2008-05-09 10:35 ` Andrew Haley
2008-05-09 15:28 Duane Ellis
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