Path: ...!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "Chris M. Thomasson" Newsgroups: comp.arch Subject: Re: Making Lemonade (Floating-point format changes) Date: Mon, 20 May 2024 13:34:58 -0700 Organization: A noiseless patient Spider Lines: 24 Message-ID: References: <20240513151647.0000403f@yahoo.com> <20240514221659.00001094@yahoo.com> <20240516001628.00001031@yahoo.com> <20240519203403.00003e9b@yahoo.com> <20240520113045.000050c5@yahoo.com> <20240520153630.00000b5a@yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Mon, 20 May 2024 22:34:59 +0200 (CEST) Injection-Info: dont-email.me; posting-host="c64270d287de33e0b6496e257486af9b"; logging-data="183804"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+0Y+kC2wCbJh6WW+99O4VGfl4yytQImjM=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Z3J1PmXjNyuYdwn8hKr/F+OtU0k= Content-Language: en-US In-Reply-To: Bytes: 2472 On 5/20/2024 12:58 PM, MitchAlsup1 wrote: > BGB wrote: > >> On 5/20/2024 7:36 AM, Michael S wrote: >>> >>> For subnormal x subnormal you don't need result of multiplication at >>> all. All you need to know is if it's zero or not and what sign. >>> Even that is needed only in non-default rounding modes and for inexact >>> flag in default mode. >>> > >> For most non-tiny formats, the seeming advantage of subnormal numbers >> seems small, in any case. > > There is, it is called Posit (or UNUM depending). > No subnormals, wider range then IEEE, more precision than IEEE (most of > the time). Whether it is better overall is still a matter of debate. It > is harder to implement than IEEE but > just barely. [...] I remember wanting to plot deep fractal zooms using Posit's! Never got around to it.