> Le 22 mars 2023 à 20:48, Oleg Nesterov <o...@redhat.com> a écrit :
>
> On 03/22, Oleg Nesterov wrote:
>>
>> Speaking of compiler options...
>
> another question ;)
>
> Can't we have a compiler option to set gGlobal->gNeedManualPow = false for
> C/C++ backends?
>
> I do not think mydsp_faustpowerXXX() generated by faust can buy something,
> I think that modern compilers can handle pow(float, int) just fine.
>
> For example,
>
> double pow10(double f)
> {
> return pow(f, 10);
> }
>
> compiles to
>
> pow10(double):
> movapd xmm1, xmm0
> mulsd xmm0, xmm0
> mulsd xmm0, xmm0
> mulsd xmm0, xmm1
> mulsd xmm0, xmm0
> ret
>
> with gcc/clang -Ofast.
>
> And can't resist, to me these faustpowerXXX() helpers look simply annoying in
> the generates C++ code although this doesn't matter.
>
> Oleg.
>
Makes sense with recent compilers. So gNeedManualPow set to false in C, C++
LLVM backends:
https://github.com/grame-cncm/faust/commit/7d5c17d9d1b0417775e59c28d5c1d0360fae1455
Stéphane
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