Subject: single-precision "expf" super slow on x86-64??

Paul Pluzhnikov
Sun Apr 29 15:52:00 GMT 2012

On Sat, Apr 28, 2012 at 10:38 PM, Miles Bader <> wrote:

>> This has very likely been fixed by
> Was there previously an optimized version of "exp", but not "expf"
> (since "exp" is already much faster)?

You can trivially answer that yourself, e.g.

gdb -q /lib/

Reading symbols from /lib/ symbols from
(gdb) list exp
18	../sysdeps/ieee754/dbl-64/w_exp.c: No such file or directory.

Now look at history of w_exp.c:;a=history;f=sysdeps/ieee754/dbl-64/w_exp.c;h=aa8ff7689ff7039cea2906e67d06264716b398e6;hb=HEAD

Paul Pluzhnikov

More information about the Libc-help mailing list