http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48933
--- Comment #4 from Joel Yliluoma <bisqwit at iki dot fi> 2011-05-09 10:51:28 UTC --- There is, however, an asinh, a cbrt, a hypot etc. for complex types. I don't know about standard, but mathematically they are well defined. (for example, hypot(x,y) = sqrt(x*x + y*y), asinh(x) = log(x + sqrt(x*x + 1))) For trunc & other rounding functions probably not so.
