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).