Warp <war### [at] tagpovrayorg> wrote:
>   That's a really odd statement. I didn't know that the FPU or the x87
> instruction set required OS support. (Can the OS even force programs to
> not use x87 instructions if it wanted to? Even if it could, it would have
> to be deliberate, and I can't really understand *why* it would want to
> do that. It would certainly break like 99% of software out there, and for
> what reason?)

Faster task switching, and less mem requirements for task information.

Currently, a task switch needs to save x87 FPU registers.

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