On 17 October 2014 09:58, Siddhesh Poyarekar <siddhesh@xxxxxxxxxx> wrote: >> > +inputs. The inputs that produce such behavior are different for >> > +.BR powf (), >> > +.BR pow () >> > +and >> > +.BR powl (). >> > + > > The slow fallback is only taken for pow, not powf or powl. Updated patch inline: diff --git a/man3/pow.3 b/man3/pow.3 index d0a2ea8..1b05292 100644 --- a/man3/pow.3 +++ b/man3/pow.3 @@ -320,6 +320,18 @@ The variant returning also conforms to SVr4, 4.3BSD, C89. .SH BUGS +On 64-bits, +.\" +.\" https://sourceware.org/bugzilla/show_bug.cgi?id=13932 +.BR pow () +may be more than 10,000 times slower for some (rare) inputs than for other nearby +inputs. This only affects +.BR pow (), +and not +.BR powf () +nor +.BR powl (). + In glibc 2.9 and earlier, .\" .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6776 and attached in case gmail messes it up. Cheers, Manuel.
diff --git a/man3/pow.3 b/man3/pow.3 index d0a2ea8..1b05292 100644 --- a/man3/pow.3 +++ b/man3/pow.3 @@ -320,6 +320,18 @@ The variant returning also conforms to SVr4, 4.3BSD, C89. .SH BUGS +On 64-bits, +.\" +.\" https://sourceware.org/bugzilla/show_bug.cgi?id=13932 +.BR pow () +may be more than 10,000 times slower for some (rare) inputs than for other nearby +inputs. This only affects +.BR pow (), +and not +.BR powf () +nor +.BR powl (). + In glibc 2.9 and earlier, .\" .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6776
