5 ms·
That's a recent change, right? They switched inf to more generic nar?
by zokier 5y ago
That's a recent change, right? They switched inf to more generic nar?
- adgjlsfhk1 5y agoI think it's been there from the beginning, but I'm not 100% sure. Realistically, Inf and -Inf are pretty much never useful in the real world, and having them makes -0.0 almost seem reasonable (since branch cuts almost always result in Inf/-Inf).
- adrian_b 5y agoIn the initial proposal for the IEEE floating-point standard, whether to have 1 or 2 values for infinities was configurable, like the rounding mode. However before the standard was adopted it was decided to reduce the number of configurable modes and the single-value infinity was dropped.
- FullyFunctional 5y agoNo, originally there were -/+ inf. NaR replaced this at some point, but semantically not much changed.
- zokier 5y ago> I think it's been there from the beginning, but I'm not 100% sure The 2017 Gustafson paper linked in the article has only inf, no nar https://posithub.org/docs/Posits4.pdf https://posithub.org/docs/Posits4.pdf
- FullyFunctional 5y agoIt's way out of date
- raymondh 5y agoWhat is the recommended latest equivalent of that document?
- FullyFunctional 5y agoThis is the latest I know of https://00248909357804553642.googlegroups.com/attach/35baf4e307f93/posit_standard-2022.pdf?part=0.1.1&view=1&view=1&vt=ANaJVrEQRoWrNrTTGtR3vRIz1GQ4wjla6MPwRoLT6KgGM_MZYm7P0yfLycs_RtVZTWD-RmHyVrM8kvvgUNwqR_cxqKsQc4rBDTmUdKOfXbAb64bY-4Gxptg https://00248909357804553642.googlegroups.com/attach/35baf4e...