Date: Sun, 12 Aug 2012 14:40:22 +0200 From: Szabolcs Nagy <nsz@...t70.net> To: musl@...ts.openwall.com Subject: Re: Priorities for next release? * Rich Felker <dalias@...ifal.cx> [2012-08-11 18:25:22 -0400]: > Actually not quite as easy as I thought. Do we also want the float and > ld versions? And how are they supposed to behave on inf/nan? I think bsd only seem to have significand and significandf so no ld version actually the same is true for scalb (musl declares scalbl but only defines scalb and scalbf, so i guess scalbl can be reomved from math.h) > an optimal implementation would be something like: > > if (isnormal(x.d)) return x.rep = (x.rep&mask|exp_0), x.d; > else return scalbn(x, -ilogb(x)); > freebsd just returns scalbn(x, -ilogb(x)) we can do that as well (eventhough it's not very efficient for normal values) (the i386 asm version uses fxtract which does the same)
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