> Guy Macon <http://www.guymacon.com/> writes:
>> That being said, I have never heard of anything other than Assembly
>> Language, C and Forth ( cir30 / ciforth ) being used with the
>> Renesas 16-bitters.
>
> The Renesas m32c line uses gcc, so any of the gcc front-ends would
> work. C, C++, FORTRAN, ObjC, etc. Assuming someone takes the time to
> port the runtime bits. I know C and C++ are there; I think someone
> had FORTRAN working at one point, or at least tried.
The IAR compiler for the Renesas M16C is able to compile C as well as
C++. But I did not use C++ on this platform, so I cannot judge the quality.
Greetings
-- Dirk
> That being said, I have never heard of anything other than Assembly
> Language, C and Forth ( cir30 / ciforth ) being used with the
> Renesas 16-bitters.
The Renesas m32c line uses gcc, so any of the gcc front-ends would
work. C, C++, FORTRAN, ObjC, etc. Assuming someone takes the time to
port the runtime bits. I know C and C++ are there; I think someone
had FORTRAN working at one point, or at least tried.
Reply by Guy Macon●March 18, 20082008-03-18
Boudewijn Dijkstra wrote:
>
>schreef Tim Wescott:
>
>> Grant Edwards wrote:
>>>deel007@googlemail.com wrote:
>>>
>>>> I am trying to optimize C++ code for an 16 Bit Microcontroller
>>>> from renesas, does someone have any idea, how can I approach
>>>> this Problem. for any help i will be very grateful
>>>
>>> 1) Measure the performance/size/whatever of various functions
>>> or modules.
>
>> 1a) compile to assembly and look at the assembly. This will help you
>> understand what the compiler is doing. I would do this with any new
>> serious* language I was learning.
>>
>> * Don't take me to task about the chances of doing this with Java or
>> Basic -- I'm being purposely chauvinistic against interpreted languages.
>
>Java is not an interpreted language. Granted, most JVM's choose to
>interpret a large portion of the bytecode. But indeed looking at the
>output of either compiler (src & JIT) will most likely not be worth your
>time.
BASIC also has both compilers and interpeters. FreeBASIC
uses AS/GAS (the Gnu assembler) to create executable code,
and is on track to becoming a front end for GCC.
That being said, I have never heard of anything other than
Assembly Language, C and Forth ( cir30 / ciforth ) being
used with the Renesas 16-bitters.
I am not a big fan of C++ for microcontrollers, but some
folks seem to like it. C seems to be a better choice to
me, but this may say more about my limitations than it
does about C or C++. :)
--
misc.business.product-dev: a Usenet newsgroup
about the Business of Product Development.
-- Guy Macon <http://www.guymacon.com/>
Reply by Boudewijn Dijkstra●March 18, 20082008-03-18
Op Tue, 18 Mar 2008 06:06:36 +0100 schreef Tim Wescott
<tim@seemywebsite.com>:
> Grant Edwards wrote:
>> On 2008-03-17, deel007@googlemail.com <deel007@googlemail.com> wrote:
>>
>>> I am trying to optimize C++ code for an 16 Bit Microcontroller
>>> from renesas, does someone have any idea, how can I approach
>>> this Problem. for any help i will be very grateful
>> 1) Measure the performance/size/whatever of various functions
>> or modules.
> 1a) compile to assembly and look at the assembly. This will help you
> understand what the compiler is doing. I would do this with any new
> serious* language I was learning.
>
> * Don't take me to task about the chances of doing this with Java or
> Basic -- I'm being purposely chauvinistic against interpreted languages.
Java is not an interpreted language. Granted, most JVM's choose to
interpret a large portion of the bytecode. But indeed looking at the
output of either compiler (src & JIT) will most likely not be worth your
time.
--
Gemaakt met Opera's revolutionaire e-mailprogramma:
http://www.opera.com/mail/
Reply by Vladimir Vassilevsky●March 18, 20082008-03-18
deel007@googlemail.com wrote:
> Hello,
>
> I am trying to optimize C++ code for an 16 Bit Microcontroller from
> renesas, does someone have any idea, how can I approach this Problem.
If you have to optimize the C++ code, then something is apparently
wrong. Either the task is wrong for this microcontroller, or you are
wrong for this task.
> for any help i will be very grateful
And how much exactly is "very grateful" ?
VLV
Reply by Tim Wescott●March 18, 20082008-03-18
Grant Edwards wrote:
> On 2008-03-17, deel007@googlemail.com <deel007@googlemail.com> wrote:
>
>> I am trying to optimize C++ code for an 16 Bit Microcontroller
>> from renesas, does someone have any idea, how can I approach
>> this Problem. for any help i will be very grateful
>
> 1) Measure the performance/size/whatever of various functions
> or modules.
>
> 2) Using the results of 1), figure out which functions/modules
> are the biggest resource hogs.
>
> 3) Fix them.
>
1a) compile to assembly and look at the assembly. This will help you
understand what the compiler is doing. I would do this with any new
serious* language I was learning.
2a) The C++ libraries are phenomenally capable -- and phenomenally big.
Avoid them unless you have phenomenal resources. Being aware of what
features of C++ (like 'new', and 'try') will cause you to pull in large
swaths of library (or screw the RTOS) is a good thing, so that you can
make intelligent decisions about what resources you _want_ pulled in.
* Don't take me to task about the chances of doing this with Java or
Basic -- I'm being purposely chauvinistic against interpreted languages.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
Reply by larwe●March 17, 20082008-03-17
On Mar 17, 7:53 pm, Grant Edwards <gra...@visi.com> wrote:
> 1) Measure the performance/size/whatever of various functions
> 2) Using the results of 1), figure out which functions/modules
> 3) Fix them.
In summary: Lather. Rinse. Repeat.
Reply by Grant Edwards●March 17, 20082008-03-17
On 2008-03-17, deel007@googlemail.com <deel007@googlemail.com> wrote:
> I am trying to optimize C++ code for an 16 Bit Microcontroller
> from renesas, does someone have any idea, how can I approach
> this Problem. for any help i will be very grateful
1) Measure the performance/size/whatever of various functions
or modules.
2) Using the results of 1), figure out which functions/modules
are the biggest resource hogs.
3) Fix them.
--
Grant Edwards grante Yow! Here I am at the flea
at market but nobody is buying
visi.com my urine sample bottles...
> I am trying to optimize C++ code for an 16 Bit Microcontroller from
> renesas, does someone have any idea, how can I approach this Problem.
It would help if you gave us more information, like which Renesas
microcontroller you're using, which C++ compiler you're using, and
what kinds of optimizations you're expecting.
Reply by deel...@googlemail.com●March 17, 20082008-03-17
Hello,
I am trying to optimize C++ code for an 16 Bit Microcontroller from
renesas, does someone have any idea, how can I approach this Problem.
for any help i will be very grateful
best regards