_theCardinal wrote:
> There are 2 typical variants of FPU around right now - 32 bit and 64 bit,
> matching the type of processor they are included on.  Having a 64 bit FPU
> is necessary for doing 64 bit arithmetic in hardware - but is not
> sufficient.  It would also require a 64 bit operating system such as
> windows XP x64, vista 64-bit, or a version of Unix compiled for 64 bit
> systems.  All mainstream 64 bit processors can run in a limited 32-bit mode
> to back-support 32 bit execution, if this is the case the precision
> available is still only 32 bit in hardware.

Wrong, unless you meant to write CPU.

FPUs on x86 as well as virtually all non-embedded-use-only processors
support at least 64-bit floating point precision in hardware..

	Thorsten, POV-Team

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