[Bug target/52593] Builtin sqrt on x86 is not correctly rounded

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52593

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-03-15 19:24:53 UTC ---
On x86_64-apple-darwin10 (default '-mfpmath=sse'), I get '0x1.fffffffffffffp-1'
for all the revisions I have tested (from 4.4 to 4.8) unless I compile the test
with '-mfpmath=387'.