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80-bit cube root
- To: libc-alpha at sourceware dot cygnus dot com
- Subject: 80-bit cube root
- From: Stephen L Moshier <moshier at mediaone dot net>
- Date: Tue, 9 Oct 2001 18:33:51 -0400 (EDT)
- Reply-To: moshier at moshier dot ne dot mediaone dot net
The file sysdeps/ieee754/ldbl-96/s_cbrtl.c does not seem to work.
It appears to have only double-precision accuracy. For x86,
there is an assembly language version sysdeps/i386/fpu/s_cbrtl.S
that apparently is the one actually used. That one is closer
to long double precision, though it shows about 2 ulps error.
Before looking further at the one in ldbl-96, I would like to
know, does anyone actually use it and has a problem been
noticed before? There does not seem to be a cube root under
sysdeps/m68k/fpu, for example.