What is `Core.Intrinsics.slt_int`

? As seen in base/sort.jl, added 2013.

Also, how can I find out the answer to this sort of question in general? I tried `@edit`

, `?`

, web searches, and even git blame (a much less ideal solution), but none came up with anything.

Emperically:

```
using Test
values = Float64[
0.0, -0.0, 1.0, -1.0, pi, 1/pi, Inf, -Inf, NaN, -NaN,
rand(), 1/rand(), -rand(), -1/rand(),
reinterpret(Float64, reinterpret(UInt64, NaN) | 78782),
-reinterpret(Float64, reinterpret(UInt64, NaN) | 78782)]
@testset "slt_int == isless(reinterpret(Int, ⋅))" begin
for a in values
for b in values
@test Core.Intrinsics.slt_int(a, b) ==
isless(reinterpret(Int64, a), reinterpret(Int64, b))
end
end
end
```

```
Test Summary: | Pass Total
slt_int == isless(reinterpret(Int, ⋅)) | 256 256
```