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Re: gcc-4.1 with fastmath

From: Barry deFreese
Subject: Re: gcc-4.1 with fastmath
Date: Tue, 05 Dec 2006 23:21:36 -0500
User-agent: Thunderbird (Windows/20061025)

Roland McGrath wrote:
gnumach doesn't support newer fpu state for mmx/xmm et al.
would need new thread state flavor for "fpx" or whatever we call it.
cf linux asm/user.h  user_i387_struct vs  user_fxsr_struct
former is what mach can handle.  need to handle latter in ctx sw + user
thread state flavor, then enable cpu support bits (cr4 bit i think).

Roland thanks.

Can one of the Savannah project members please create a task for this? I tried to but apparently only members can create new tasks, etc?

Also, does anyone happen to know why i386_fp_save and i386_fp_regs are split out? In Linux's user.h they are in 1 struct: user_i387_struct.

Thanks as always!

Barry deFreese (aka bddebian)

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