http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49363
--- Comment #2 from vincenzo Innocente <vincenzo.innocente at cern dot ch>
2011-06-11 05:58:46 UTC ---
These new developments sound interesting. Hope somebody is working on it and
will publish a testable version soon.
On the other hand I was thinking more of exploiting auto-vectorization for
which having multiple copy of the very same code looks to me not necessary and
error prone, Something for instance along these line
float __attribute__ ((__target__ ("sse2","sse3","avx","fma")))
sum0(float const * __restrict__ x,
float const * __restrict__ y, float const * __restrict__ z) {
float sum=0;
for (int i=0; i!=1024; ++i)
sum += z[i]+x[i]*y[i];
return sum;
}
If my understanding of the proposal is correct I will have to copy-paste this
function four times, one for each target.
