------- Comment #8 from segher at kernel dot crashing dot org 2010-01-05 16:00 ------- (In reply to comment #6) > IIRC the problem is that using fma causes the -0 argument for fsqrt (which > behaves 100% correct). Thus a more sensible fix would be to do the 0+ on > the fma result.
But a -0 result from fsqrt() is no problem /an sich/; problems only show up when you pass a +/- 0 to a function with a discontinuity there. Also, doing an extra addition on every fma is hugely expensive. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42286
