Am 13.07.2018 um 16:36 schrieb Martok:
Am 12.07.2018 um 23:38 schrieb Florian Klämpfl:
This will result in different results for runtime and compile time calculated
expressions => bad idea.
Aye, doing the same at runtime and compile time would be the sane idea.
Still, the Delphi(32) compiler always works with Extended precision at compile
time. See
<http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Declared_Constants#True_Constants>:
"If constantExpression is a real, its type is Extended" - that type then
propagates.
Yes, this is for sure x87 inheritance. On x87 it is in practice always the case that operations are carried out with
extended precision.
The other links were about intermediates of runtime calculations, so this change
is correct:
I have added support for the directive $EXCESSPRECISION: it forces that all
binary float operations are executed with
the highest available precision available for the currently selected FPU
On that commit, am I blind or is this the same expression twice?
<https://github.com/graemeg/freepascal/blob/340c0b3b/compiler/nadd.pas#L159>
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