Date: Wed, 12 Feb 2003 18:13:16 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Parveen Patel <ppatel@cs.utah.edu> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: floating point in the kernel Message-ID: <20030213001316.GD1980@dan.emsphone.com> In-Reply-To: <20030212124123.M11977-100000@bas.flux.utah.edu> References: <20030212124123.M11977-100000@bas.flux.utah.edu>
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In the last episode (Feb 12), Parveen Patel said: > Can I use floating point operations inside the FreeBSD kernel version > 4.7-stable? It used to be a policy not to use it for obvious > performance probelms. You're not supposed to. I think this was the last time it was brought up: http://groups.google.com/groups?threadm=746alr%24d44%241%40FreeBSD.csie.NCTU.edu.tw > Are there any known work arounds? Like some standard efficient > techniques to convert floating point operations to fixed point > operations without losing too much precision. Multiply your numbers by 10^9, store everything in long longs, and write your own printf_fake_fp function that shifts the decimal point? -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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