Re: Commit: XStormy16: Add __clrsbhi2() to libgcc

[nick clifton <nickc at redhat dot com>]

Hi Johann,
> Hi, just out of curiosity: Is there a special reason to add a
> stormy16-specific implementation instead of using the code in
> libgcc2.c? t-avr for example uses the C implementation in libgcc2.c
> for HI. Are there disadvantages?

Apart from not using some slightly frightening makefile magic ?  No, no 
real reason.  In fact the implementation in stormy16/lib2funcs.c is 
based directly on the code in libgcc2.c.

I prefer my current approach because if it turns out that this function 
is used a lot then it will easy to replace the current C implementation 
with hand coded assembler.  But if there was a way to automate the 
detection of bit counting functions in libgcc2.c, so that when a new one 
is added we would not have to update t-avr or t-stormy16, then I would 
go with your approach.

Cheers
  Nick