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GNU Mach and FPU support (exceptions handling mode)

From: Evgeniy Ivanov
Subject: GNU Mach and FPU support (exceptions handling mode)
Date: Thu, 9 Jul 2009 19:35:16 +0400

Hi list,

I'm implementing FPU/MMX/SSE support in Minix 3 and not sure what mode for exceptions handling should be used: MS-DOS compatible or native.
Why does GNU Mach use MS-DOS compatible mode (I didn't find any place, where CR0.NE is set)? Intel manual highly recommends using native mode, also you can't use MS-DOS compatible mode in multiprocessors PCs (probably in multicore too).

Thanks in advance for all answers.

Best Regards,

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