https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97428
--- Comment #9 from Michael_S <already5chosen at yahoo dot com> ---
Hopefully, you did regression tests for all main AoS<->SoA cases.
I.e.
typedef struct { double re, im; } dcmlx_t;
void soa2aos(double* restrict dstRe, double* restrict dstIm, const dcmlx_t
src[], int nq)
{
for (int i = 0; i < nq*4; ++i) {
dcmlx_t s = src[i];
dstRe[i] = s.re;
dstIm[i] = s.im;
}
}
void aos2soa(dcmlx_t* restrict dst, const double* srcRe, const double* srcIm,
int nq)
{
for (int i = 0; i < nq*4; ++i) {
dst[i].re = srcRe[i];
dst[i].im = srcIm[i];
}
}
And equivalents with float instead of double.
Right now 'gcc.10.2 -march=skylake -O3' does very good job for soa2aos() and
suboptimal, but not horrible job for aos2soa(). Hopefully, your changes do not
break any of it.
Personally, I don't like SoA layouts and very much prefer AoSoA, but I
recognize that in existing code bases SoA is more common.
