On 17.04.2011 19:30, Hans-Peter Diettrich wrote:
Some time ago I've heard a rumor that the Extended type is not supported
by x86_64 targets. But AFAIK the x87 FPU continues to exist in 64 bit
machines, and is still accessible by the well known coprocessor
instruction set.
So what's the current state of floating point types in FPC?
On Windows 64-bit you must not use the x87 FPU, because Microsoft wants
it so. Thus on Win64 Extended=Double.
On other x86_64 based operating systems the state might be different.
Other CPUs don't even have a coprocessor or only a vendorspecific one
(like some ARMs) and thus there's also the rule Extended=Double.
Regards,
Sven
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