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Add lmul! and rmul! for Bidiagonal #51777

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merged 7 commits into from
Nov 19, 2023
Merged

Add lmul! and rmul! for Bidiagonal #51777

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1a785c4
Add `lmul!` and `rmul!` for `Bidiagonal`
dkarrasch Oct 19, 2023
149f8db
make `rmul!` aliasing-ready
dkarrasch Oct 25, 2023
7409293
resolve ambiguity
dkarrasch Oct 25, 2023
ae67df4
more disambiguation
dkarrasch Oct 30, 2023
e937c6d
revert size check change
dkarrasch Oct 30, 2023
63b1009
add more tests
dkarrasch Nov 18, 2023
e9b3ac2
Merge branch 'master' into dk/bidiagmul!
dkarrasch Nov 18, 2023
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revert size check change
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@dkarrasch
dkarrasch committed Oct 30, 2023
commit e937c6d4668a22d0c10ce119543e6370b61a3606
7 changes: 6 additions & 1 deletion stdlib/LinearAlgebra/src/bidiag.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -565,7 +565,12 @@ function _mul!(C::AbstractVecOrMat, A::BiTriSym, B::AbstractVecOrMat, _add::MulA
require_one_based_indexing(C, B)
nA = size(A,1)
nB = size(B,2)
check_A_mul_B!_sizes(C, A, B)
if !(size(C,1) == size(B,1) == nA)
throw(DimensionMismatch("A has first dimension $nA, B has $(size(B,1)), C has $(size(C,1)) but all must match"))
end
if size(C,2) != nB
throw(DimensionMismatch("A has second dimension $nA, B has $(size(B,2)), C has $(size(C,2)) but all must match"))
end
iszero(nA) && return C
iszero(_add.alpha) && return _rmul_or_fill!(C, _add.beta)
nA <= 3 && return mul!(C, Array(A), Array(B), _add.alpha, _add.beta)
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