I thought `exp`

was now writen in pure Julia code. Is it still calling an LLVM intrinsic?

# Is `exp` implemented with an LLVM intrinsic?

**cossio**#1

Something is making Julia think I am using imaginary numbers?

**mbauman**#2

`exp(x)`

is written in pure julia code, but the more general `y^x`

is an LLVM function call (for `x::Float64, y::Float64`

).

**Seif_Shebl**#3

You can locate `exp()`

quite easily like this:

```
julia> @which exp(1.0)
exp(x::T) where T<:Union{Float32, Float64} in Base.Math at special/exp.jl:75
```

which indeed shows that it is written in pure Julia.