5-arg mul! with 3-arg mul! support

[haampie]

Turns out I was not right about that static if for julia 1.3.0 (the relevant commit in base was merged before the release of 1.3.1, but only made its way into julia from 1.4.0-rc1).

Otherwise this should work after JuliaGPU/GPUArrays.jl#253 is merged, because GPUArrays is stealing 3-arg mul! from CuArrays at the moment.

[maleadt]

Once we merge the GPUArrays one, do an add GPUArrays#master here so that we can run CI.

[haampie]

I believe we need the master version of CUDAnative as well because of CUDAapi 4 compat.

bors try

[maleadt]

I believe we need the master version of CUDAnative as well because of CUDAapi 4 compat.

The Manifest already listed a specific git sha. I prefer not to use just master because that might hurt reproducibility.

[haampie]

Ok, fixed that

[maleadt]

bors try

[maleadt]

bors d+

[bors]

✌️ haampie can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

[haampie]

bors try-

[haampie]

bors try

[bors]

try

Already running a review

[haampie]

bors try-

[maleadt]

bors try

[haampie]

Oof... there's a Julia 1.4.0-x specific inconsistency / ambiguity for one last single mul! signature... Will work around it here and then make a PR for base

[bors]

try

Build failed

• ci/gitlab/trying

[haampie]

bors try

[bors]

try

Build succeeded

• ci/gitlab/trying

[maleadt]

Light at the end of the tunnel!
bors r+

[bors]

Build succeeded

• ci/gitlab/staging

[haampie]

😌