Re: [avr-gcc-list] Using hardware multiplier on ATmega128L

[John Rehwinkel]

> > In particular I have this kind of instruction on my NeSC program 
> > (NeSC is a "dialect" of C language ...):

> Good and bad news. The code you've written is already using the 
> hardware multiply... (avr-gcc's 32-bit multiply routine for atmega128 
> uses the hardware multiply).

Actually, I doubt it.  AFAIK, gcc doesn't support NeSC, so he's 
probably using a different
compiler.  My suggestion would be to just lift the multiply code out of 
libgcc (hint: it's in
gcc/config/avr/libgcc.S in the gcc source tree).  Another approach is 
to build your app
with gcc, then use objdump to extract the relevant parts.  Since I 
don't use NeSC, I have
no idea how to include assembler with it.

-- John Rehwinkel