MPArray: constructor

MPArray(AH::AbstractArray{Float64,2}; TF = Float32, onthefly=false) Default constructor for MPArray.

C. T. Kelley 2023

The MPArray data structure is

struct MPArray{TW<:AbstractFloat,TF<:AbstractFloat,TR<:AbstractFloat}
    AH::AbstractArray{TW,2}
    AL::AbstractArray{TF,2}
    residual::Vector{TR}
    sol::Vector{TR}
    onthefly::Bool
end

The constructor just builds an MPArray with TW=Float64. Set TF=Float16 to get double/half IR.

MPArray(AH::AbstractArray{Float32,2}; TR = nothing, TF = Float16, onthefly=true) Default single precision constructor for MPArray with TF=Float16

If your high precision array is single, then your low precision array is half (Duh!).

We do the triangular solves with on-the-fly interprecision transfer in this case because the bit of extra accuracy makes a difference and, at least for now, on-the-fly interprecision transfers are cheaper.

Data structures etc are the same as in the double-single/half case, but you don't have the option to go lower than half.