OK, it would help if I used the compiler options! -O3 -ffast-math -march=athlon-xp fixp: 1.720s float: 3.250s fistl: 3.420s -O3 -ffast-math -march=athlon-xp -lm lrint: 3.370s (double counter) lrintf: 2.670s (float counter) - Myk