Date: Fri, 28 Dec 2012 21:28:01 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Stephen Montgomery-Smith <stephen@missouri.edu> Cc: freebsd-numerics@freebsd.org, Bruce Evans <brde@optusnet.com.au> Subject: Re: complex arc-trig etc Message-ID: <20121229052801.GA841@troutmask.apl.washington.edu> In-Reply-To: <50DE6576.9040200@missouri.edu> References: <50CE9D0C.8080901@missouri.edu> <20121217191324.T1277@besplex.bde.org> <50DE5474.1070900@missouri.edu> <20121229031907.GA428@troutmask.apl.washington.edu> <50DE6576.9040200@missouri.edu>
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On Fri, Dec 28, 2012 at 09:37:26PM -0600, Stephen Montgomery-Smith wrote: > On 12/28/2012 09:19 PM, Steve Kargl wrote: > > On Fri, Dec 28, 2012 at 08:24:52PM -0600, Stephen Montgomery-Smith wrote: > >> On 12/17/2012 02:38 AM, Bruce Evans wrote: > >>> On Sun, 16 Dec 2012, Stephen Montgomery-Smith wrote: > >>> > >>>> Hey guys, my complex arc-trig functions at > >>>> http://people.freebsd.org/~stephen/ have been sitting there a long time. > >>>> Anyone want to commit them? > >>> > >>> I was sort of waiting for the next rounds of changes: > >>> > >>> 1. update the template to give similar code for float and long double > >>> 2. make it work for i386 using ENTERI() > >> > >> What is ENTERI()? > > > > For 'long double' on i386, the precision is > > set to 53 bits in the kernel (see the file > > sys/x86/include/fpu.h). ENTERI() toggles > > the fpu control word to use 64 bits for > > long double and you use RETURNI() instead > > of 'return(val)' to return from the function. > > You can see these being used in msun/src/ld80/ > > s_expl.c. Also, note the ENTERI() and RETURNI() > > are defined in msun/src/math_private.h. > > > > Bruce can probably give a better explanation > > and the history. > > > Now I see why I couldn't find it. It is only in CURRENT. (I had > grepped the whole of source, but I am still in the dark ages of FreeBSD-8.) Yes, it is a CURRENT only thing at the moment. I suppose that someone someday may do a merge from current, but it won't be me as I only run -current. -- Steve
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