Comments (1)
a workaround has been found.
Iin fact the pb appered in cases as
auto c = ab
auto d = (c+x)-x
where c+x what undully replaced by fma(a,b,c) linked with the behaviour of the compiling option -ffp-contract=xxx for which in g++9 on and fast have the same meaning.
replacing auto c = ab by c=a*b+0 settle the problem as g++ gredily transform this line in fma(a,b,0) and does the following one in the intended fashion
So enforce precision can wait
from eve.
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from eve.