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Enabling Integer Matrix Multiplication #86

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Enabling Integer Matrix Multiplication #86

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91c1a17
Update binary.jl
Nader-Rahhal Dec 10, 2025
8b995e3
add testing
Nader-Rahhal Dec 12, 2025
e7af35c
Update src/ndarray/binary.jl
krasow Jan 14, 2026
a9884c8
Merge branch 'main' into nader
krasow Jan 14, 2026
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20 changes: 15 additions & 5 deletions src/ndarray/binary.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -129,11 +129,21 @@ function Base.:(*)(rhs1::NDArray{Bool,2}, rhs2::NDArray{Bool,2})
)
end

function Base.:(*)(rhs1::NDArray{<:Integer,2}, rhs2::NDArray{<:Integer,2})
#* this is a stupid.....
throw(
ArgumentError("cuNumeric.jl does not support matrix multiplication of two Integer arrays")
)
function Base.:(*)(rhs1::NDArray{A,2}, rhs2::NDArray{B,2}) where {A<:Integer, B<:Integer}

size(rhs1, 2) == size(rhs2, 1) || throw(DimensionMismatch("Matrix dimensions incompatible: $(size(rhs1)) × $(size(rhs2))"))

ResultType = __my_promote_type(A, B)
IntermediateType = Float64

A_float = cuNumeric.as_type(rhs1, IntermediateType)
B_float = cuNumeric.as_type(rhs2, IntermediateType)

C_float = A_float * B_float
C_int = cuNumeric.as_type(C_float, ResultType)

return C_int

end

@doc"""
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7 changes: 3 additions & 4 deletions test/tests/gemm.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -36,10 +36,9 @@ function gemm(N, M, T, max_diff)
if T <: Integer
a = cuNumeric.ones(Int32, 5, 5)
a_jl = ones(Int32, 5, 5)
b = cuNumeric.ones(Float32, 5, 5)
b_jl = ones(Float32, 5, 5)
@test_throws ArgumentError a * a
@test @allowscalar cuNumeric.compare(a_jl * b_jl, a * b, 0.0, max_diff)
b = a * a
b_jl = a_jl * a_jl
@test @allowscalar cuNumeric.compare(b_jl, b, 0.0, max_diff)
return
end

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