https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110062
--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
trunk -O3 -flto -march=native -fopenmp
Operation: Sharpen:
257
256
256
Average: 256 Iterations Per Minute
GCC13 -O3 -flto -march=native -fopenmp
257
256
256
Average: 256 Iterations Per Minute
clang17 O3 -flto -march=native -fopenmp
Operation: Sharpen:
257
256
256
Average: 256 Iterations Per Minute
So I guess I will need to try on zen3 to see if there is any difference.
the internal loop is:
0.00 │460:┌─→movzbl 0x2(%rdx,%rax,4),%esi ▒
0.02 │ │ vmovss (%r8,%rax,4),%xmm2 ▒
0.95 │ │ vcvtsi2ss %esi,%xmm0,%xmm1 ▒
20.22 │ │ movzbl 0x1(%rdx,%rax,4),%esi ▒
0.01 │ │ vfmadd231ss %xmm1,%xmm2,%xmm3 ▒
11.97 │ │ vcvtsi2ss %esi,%xmm0,%xmm1 ▒
18.76 │ │ movzbl (%rdx,%rax,4),%esi ▒
0.00 │ │ inc %rax ▒
0.72 │ │ vfmadd231ss %xmm1,%xmm2,%xmm4 ▒
12.55 │ │ vcvtsi2ss %esi,%xmm0,%xmm1 ▒
14.95 │ │ vfmadd231ss %xmm1,%xmm2,%xmm5 ▒
15.93 │ ├──cmp %rax,%r13 ▒
0.35 │ └──jne 460
so it still does not get....
