User`s guide

9 GPU Computing
9-12
Function Input Range for Real Output
log(x) x >= 0
log1p(x) x >= -1
log10(x) x >= 0
log2(x) x >= 0
power(x,y) x >= 0
reallog(x) x >= 0
realsqrt(x) x >= 0
sqrt(x) x >= 0