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Merged
pull merged 1 commit into from
Nov 11, 2025
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[pull] master from JuliaLang:master #2105

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27 changes: 23 additions & 4 deletions base/arraymath.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2,26 +2,45 @@

## Binary arithmetic operators ##

function _broadcast_preserving_zero_d(f, A, B)
broadcast_preserving_zero_d(f, A, B)
end

# Using map over broadcast enables vectorization for wide matrices with few rows.
# This is because we use linear indexing in `map` as opposed to Cartesian indexing in broadcasting.
# https://github.com/JuliaLang/julia/issues/47873#issuecomment-1352472461
function _broadcast_preserving_zero_d(f, A::Array, B::Array)
map(f, A, B)
end

function _broadcast_preserving_zero_d(f, A::Array, B::Number)
map(Fix2(f, B), A)
end

function _broadcast_preserving_zero_d(f, A::Number, B::Array)
map(Fix1(f, A), B)
end

for f in (:+, :-)
@eval function ($f)(A::AbstractArray, B::AbstractArray)
promote_shape(A, B) # check size compatibility
broadcast_preserving_zero_d($f, A, B)
_broadcast_preserving_zero_d($f, A, B)
end
end

function +(A::Array, Bs::Array...)
for B in Bs
promote_shape(A, B) # check size compatibility
end
broadcast_preserving_zero_d(+, A, Bs...)
map(+, A, Bs...)
end

for f in (:/, :\, :*)
if f !== :/
@eval ($f)(A::Number, B::AbstractArray) = broadcast_preserving_zero_d($f, A, B)
@eval ($f)(A::Number, B::AbstractArray) = _broadcast_preserving_zero_d($f, A, B)
end
if f !== :\
@eval ($f)(A::AbstractArray, B::Number) = broadcast_preserving_zero_d($f, A, B)
@eval ($f)(A::AbstractArray, B::Number) = _broadcast_preserving_zero_d($f, A, B)
end
end

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