Re: Q for inline arm assembly: 'M' constraint?

[Bryce Schober <bryceman at dpzone dot com>]

Richard Earnshaw wrote:

> Not entirely sure.  Which compiler release and what optimization level are 
> you using?  

$ arm-elf-gcc -v
Reading specs from /usr/local/lib/gcc-lib/arm-elf/3.3/specs
Configured with: ../gcc-3.3-core/configure --target=arm-elf 
--prefix=/usr/local --enable-languages=c 
--with-local-prefix=/usr/local/arm-elf --without-headers --with-newlib 
--disable-shared
Thread model: single
gcc version 3.3

Also, I was using -O0, then tried -O1 per your suggestion on the code 
you submitted, but it still used registers.

> With a simple testcase I tried I got:

<snip>

> with -O1 on the current development version of the compiler.

I was not able to reproduce this, although my "const char n = 8; const 
char m = 32 - n;" version compiled with warnings once I made it static, 
for some reason.


--
Bryce Schober
Design Engineer
Dynon Avionics, Inc.
www.dynonavionics.com

---
[This E-mail scanned for viruses by digiposs.com]


------
Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com