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Let muladd accept arrays #37065

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merged 7 commits into from
Oct 29, 2020
Merged

Let muladd accept arrays #37065

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805eae9
muladd for arrays
Aug 16, 2020
7d0d91a
docstring
Aug 25, 2020
749e953
treat adjoints etc, and add tests
Sep 27, 2020
fc0ca88
remember to save before committing
Sep 27, 2020
191f61d
always use eltype, and add one test
Oct 6, 2020
69a3546
use ndims(number)==0, and add array-of-array tests
Oct 6, 2020
6456bf5
better wording
Oct 9, 2020
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always use eltype, and add one test
  • Loading branch information
Michael Abbott committed Oct 6, 2020
commit 191f61d2ed5f2843bdbf7a7d89e2a1a5dc57f91e
4 changes: 2 additions & 2 deletions stdlib/LinearAlgebra/src/matmul.jl
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Expand Up @@ -203,14 +203,14 @@ julia> muladd(A, B, C)
```
"""
function Base.muladd(A::AbstractMatrix{TA}, y::AbstractVector{Ty}, z) where {TA, Ty}
T = promote_type(TA, Ty, z isa AbstractArray ? eltype(z) : typeof(z))
T = promote_type(TA, Ty, eltype(z))
C = similar(A, T, axes(A,1))
C .= z
mul!(C, A, y, true, true)
end

function Base.muladd(A::AbstractMatrix{TA}, B::AbstractMatrix{TB}, z) where {TA, TB}
T = promote_type(TA, TB, z isa AbstractArray ? eltype(z) : typeof(z))
T = promote_type(TA, TB, eltype(z))
C = similar(A, T, axes(A,1), axes(B,2))
C .= z
mul!(C, A, B, true, true)
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1 change: 1 addition & 0 deletions stdlib/LinearAlgebra/test/matmul.jl
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Expand Up @@ -318,6 +318,7 @@ end
@test muladd(u2, v3', 0) isa Matrix
@test muladd(u2, v3', 99) == u2 * v3' .+ 99
@test muladd(u2, v3', A23) == u2 * v3' .+ A23
@test_throws DimensionMismatch muladd(u2, v3', ones(2,3,4))

@test muladd(u2', u2, 0) isa Number
@test muladd(v3', v3, im) == dot(v3,v3) + im
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