On Saturday, 6 August 2016 at 19:51:11 UTC, Walter Bright wrote:
On 8/6/2016 2:48 AM, Ilya Yaroshenko wrote:
I don't know what the point of fusedMath is.
It allows a compiler to replace two arithmetic operations with
single composed
one, see AVX2 (FMA3 for intel and FMA4 for AMD) instruction
set.
I understand that, I just don't understand why that wouldn't be
done anyway.
Some applications requires exactly the same results for different
architectures (probably because business requirement). So this
optimization is turned off by default in LDC for example.
