Comment 12 for bug 637797

Ramana Radhakrishnan (ramana) wrote :

This is still a size and speed optimization at Os but not for this benchmark at O2 and O3. It's also a speed optimization in case you are generating quotients and remainders of 2 different numbers in a routine. It's not a speed optimization for this particular benchmark because you are still generating the multiplies at O2 and O3 but is alright for the same. For this case we won't get a further benefit with code generation and improvements in this particular benchmark for speed.

I've prototyped this on trunk with the branch

https://code.launchpad.net/~ramana/gcc-linaro/divmodsi4-experiments

Ramana