This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: RFC: x86: Emit rsqrt with only -ffast-math
Hi,
On Tue, 3 Nov 2009, Richard Guenther wrote:
> Thus, I'm ok with that if the target maintainers agree. I think this
> needs a documentation update to mrecip though.
r153940. I've added this sentence to the -mrecip docu:
+Note that GCC implements 1.0f/sqrtf(x) in terms of RSQRTSS (or RSQRTPS)
+already with @option{-ffast-math} (or the above option combination), and
+doesn't need @option{-mrecip}.
Ciao,
Michael.