On 06/23/2016 02:37 PM, Seb wrote:
On Thursday, 23 June 2016 at 18:05:07 UTC, Andrei Alexandrescu wrote:
On 06/23/2016 01:34 PM, H. S. Teoh via Digitalmars-d wrote:
I don't understand why that goto is necessary.
Eh, thank you all who set me straight! I've been in my head for too
long. So where is the current implementation of "^^"? If it's not as
fast as this, we should replace it. -- Andrei
^^ seems to be lowered here
https://github.com/dlang/dmd/blob/9903aba3b1d39bf499a54edbc81c7d9f08711f3e/src/constfold.d#L506
and std.math.pow is defined here:
https://github.com/dlang/phobos/blob/master/std/math.d#L6028
I see, thanks. Both seem to be ripe for the optimized version (they do
more testing than necessary).
However you should test how it performs against the LLVM intrinsics
available in LDC, e.g.:
llvm.intrinsincs.llvm_pow and llvm_powi (i = integer).
Cool! Is that a CPU operation?
Andrei
