Date: Mon, 29 Dec 2003 23:16:31 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Nigel Weeks <nigel@e-easy.com.au> Cc: freebsd-questions@freebsd.org Subject: Re: Is it true?... Message-ID: <20031230051631.GA64644@dan.emsphone.com> In-Reply-To: <00b401c3ce8a$9f447ba0$030aa8c0@corp.eeasy.com.au> References: <00b401c3ce8a$9f447ba0$030aa8c0@corp.eeasy.com.au>
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In the last episode (Dec 30), Nigel Weeks said: > If I have 'MATH_EMULATE' in my kernel, will it: > > A. Detect that the processor has a hardware FPU, and use that instead > B. Use the software one, ignoring the hardware FPU? > > (Hopefully the latter - a performance jump will be nice...) The former. Hardware FPU is much faster than software emulation. MATH_EMULATE is only necessary for CPUs with no hardware FP at all (386sx or possibly embedded 486-class CPUs). -- Dan Nelson dnelson@allantgroup.com
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