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Complete size checks in BLAS.[sy/he]mm! #45605

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Jul 7, 2022
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Complete size checks in BLAS.[sy/he]mm! #45605

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9447634
Complete size checks in `BLAS.[sy/he]mm!`
dkarrasch Jun 7, 2022
e8e4497
take side into account
dkarrasch Jun 8, 2022
581a2b7
split size checks in left- and right-multiplication
dkarrasch Jun 9, 2022
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52 changes: 42 additions & 10 deletions stdlib/LinearAlgebra/src/blas.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1539,11 +1539,27 @@ for (mfname, elty) in ((:dsymm_,:Float64),
require_one_based_indexing(A, B, C)
m, n = size(C)
j = checksquare(A)
if j != (side == 'L' ? m : n)
throw(DimensionMismatch(lazy"A has size $(size(A)), C has size ($m,$n)"))
end
if size(B,2) != n
throw(DimensionMismatch(lazy"B has second dimension $(size(B,2)) but needs to match second dimension of C, $n"))
M, N = size(B)
if side == 'L'
if j != m
throw(DimensionMismatch(lazy"A has first dimension $j but needs to match first dimension of C, $m"))
end
if N != n
throw(DimensionMismatch(lazy"B has second dimension $N but needs to match second dimension of C, $n"))
end
if j != M
throw(DimensionMismatch(lazy"A has second dimension $j but needs to match first dimension of B, $M"))
end
else
if j != n
throw(DimensionMismatch(lazy"B has second dimension $j but needs to match second dimension of C, $n"))
end
if N != j
throw(DimensionMismatch(lazy"A has second dimension $N but needs to match first dimension of B, $j"))
end
if M != m
throw(DimensionMismatch(lazy"A has first dimension $M but needs to match first dimension of C, $m"))
end
end
chkstride1(A)
chkstride1(B)
Expand Down Expand Up @@ -1613,11 +1629,27 @@ for (mfname, elty) in ((:zhemm_,:ComplexF64),
require_one_based_indexing(A, B, C)
m, n = size(C)
j = checksquare(A)
if j != (side == 'L' ? m : n)
throw(DimensionMismatch(lazy"A has size $(size(A)), C has size ($m,$n)"))
end
if size(B,2) != n
throw(DimensionMismatch(lazy"B has second dimension $(size(B,2)) but needs to match second dimension of C, $n"))
M, N = size(B)
if side == 'L'
if j != m
throw(DimensionMismatch(lazy"A has first dimension $j but needs to match first dimension of C, $m"))
end
if N != n
throw(DimensionMismatch(lazy"B has second dimension $N but needs to match second dimension of C, $n"))
end
if j != M
throw(DimensionMismatch(lazy"A has second dimension $j but needs to match first dimension of B, $M"))
end
else
if j != n
throw(DimensionMismatch(lazy"B has second dimension $j but needs to match second dimension of C, $n"))
end
if N != j
throw(DimensionMismatch(lazy"A has second dimension $N but needs to match first dimension of B, $j"))
end
if M != m
throw(DimensionMismatch(lazy"A has first dimension $M but needs to match first dimension of C, $m"))
end
end
chkstride1(A)
chkstride1(B)
Expand Down
8 changes: 8 additions & 0 deletions stdlib/LinearAlgebra/test/blas.jl
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Expand Up @@ -222,11 +222,19 @@ Random.seed!(100)
@test_throws DimensionMismatch BLAS.symm('R','U',Cmn,Cnn)
@test_throws DimensionMismatch BLAS.symm!('L','U',one(elty),Asymm,Cnn,one(elty),Cmn)
@test_throws DimensionMismatch BLAS.symm!('L','U',one(elty),Asymm,Cnn,one(elty),Cnm)
@test_throws DimensionMismatch BLAS.symm!('L','U',one(elty),Asymm,Cmn,one(elty),Cnn)
@test_throws DimensionMismatch BLAS.symm!('R','U',one(elty),Asymm,Cnm,one(elty),Cmn)
@test_throws DimensionMismatch BLAS.symm!('R','U',one(elty),Asymm,Cnn,one(elty),Cnm)
@test_throws DimensionMismatch BLAS.symm!('R','U',one(elty),Asymm,Cmn,one(elty),Cnn)
if elty <: BlasComplex
@test_throws DimensionMismatch BLAS.hemm('L','U',Cnm,Cnn)
@test_throws DimensionMismatch BLAS.hemm('R','U',Cmn,Cnn)
@test_throws DimensionMismatch BLAS.hemm!('L','U',one(elty),Aherm,Cnn,one(elty),Cmn)
@test_throws DimensionMismatch BLAS.hemm!('L','U',one(elty),Aherm,Cnn,one(elty),Cnm)
@test_throws DimensionMismatch BLAS.hemm!('L','U',one(elty),Aherm,Cmn,one(elty),Cnn)
@test_throws DimensionMismatch BLAS.hemm!('R','U',one(elty),Aherm,Cnm,one(elty),Cmn)
@test_throws DimensionMismatch BLAS.hemm!('R','U',one(elty),Aherm,Cnn,one(elty),Cnm)
@test_throws DimensionMismatch BLAS.hemm!('R','U',one(elty),Aherm,Cmn,one(elty),Cnn)
end
end
end
Expand Down
6 changes: 6 additions & 0 deletions stdlib/LinearAlgebra/test/symmetric.jl
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Expand Up @@ -352,6 +352,9 @@ end
C = zeros(eltya,n,n)
@test Hermitian(aherm) * a ≈ aherm * a
@test a * Hermitian(aherm) ≈ a * aherm
# rectangular multiplication
@test [a; a] * Hermitian(aherm) ≈ [a; a] * aherm
@test Hermitian(aherm) * [a a] ≈ aherm * [a a]
@test Hermitian(aherm) * Hermitian(aherm) ≈ aherm*aherm
@test_throws DimensionMismatch Hermitian(aherm) * Vector{eltya}(undef, n+1)
LinearAlgebra.mul!(C,a,Hermitian(aherm))
Expand All @@ -360,6 +363,9 @@ end
@test Symmetric(asym) * Symmetric(asym) ≈ asym*asym
@test Symmetric(asym) * a ≈ asym * a
@test a * Symmetric(asym) ≈ a * asym
# rectangular multiplication
@test Symmetric(asym) * [a a] ≈ asym * [a a]
@test [a; a] * Symmetric(asym) ≈ [a; a] * asym
@test_throws DimensionMismatch Symmetric(asym) * Vector{eltya}(undef, n+1)
LinearAlgebra.mul!(C,a,Symmetric(asym))
@test C ≈ a*asym
Expand Down