Re: [sdcc-devel] Replacing division by power of two

[Philipp K. K. <pk...@sp...>]

Am 21.04.2012 21:05, schrieb Philipp Klaus Krause:
> On second thought this would be beneficial for the hc08, too: Signed
> division is somewhat complicated, the division instruction has limited
> size, and this replacement works for operands of any size.
> 
> Philipp

Fixed and enabled for hc08, z80, z180, r2k and gbz80 in revision #7682.
Those more familiar with the other architectures might want to enable it
for their ports, too. It should be a useful optimization for all ports
that do not have native signed division.

Philipp

P.S.: In the place were an assertion would have saved me some time
tracking down the issue I found a comment "/* I assume that […] */. I
now added the assertion for both the z80 and mcs51 backends, but there
might be similar things in other places.