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Extend Ruge-Stuben solver to complex type #96

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Extend Ruge-Stuben solver to complex type #96

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13 changes: 7 additions & 6 deletions src/classical.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,7 @@ function extend_heirarchy!(levels, strength, CF, A::SparseMatrixCSC{Ti,Tv}, symm
end

function direct_interpolation(At, T, splitting)
T = typeof(At)(T)
fill!(T.nzval, eltype(At)(1))
T .= At .* T

Expand Down Expand Up @@ -99,7 +100,7 @@ function rs_direct_interpolation_pass2(At::SparseMatrixCSC{Tv,Ti},
row = T.rowval[j]
sval = T.nzval[j]
if splitting[row] == C_NODE
if sval < 0
if real(sval) < 0
sum_strong_neg += sval
else
sum_strong_pos += sval
Expand All @@ -115,7 +116,7 @@ function rs_direct_interpolation_pass2(At::SparseMatrixCSC{Tv,Ti},
if row == i
diag += aval
else
if aval < 0
if real(aval) < 0
sum_all_neg += aval
else
sum_all_pos += aval
Expand All @@ -125,7 +126,7 @@ function rs_direct_interpolation_pass2(At::SparseMatrixCSC{Tv,Ti},

if sum_strong_pos == 0
beta = zero(diag)
if diag >= 0
if real(diag) >= 0
diag += sum_all_pos
end
else
Expand All @@ -134,14 +135,14 @@ function rs_direct_interpolation_pass2(At::SparseMatrixCSC{Tv,Ti},

if sum_strong_neg == 0
alpha = zero(diag)
if diag < 0
if real(diag) < 0
diag += sum_all_neg
end
else
alpha = sum_all_neg / sum_strong_neg
end

if isapprox(diag, 0, atol=eps(Tv))
if isapprox(real(diag), 0, atol=eps(real(Tv)))
neg_coeff = Tv(0)
pos_coeff = Tv(0)
else
Expand All @@ -155,7 +156,7 @@ function rs_direct_interpolation_pass2(At::SparseMatrixCSC{Tv,Ti},
sval = T.nzval[j]
if splitting[row] == C_NODE
Bj[nnz] = row
if sval < 0
if real(sval) < 0
Bx[nnz] = abs(neg_coeff * sval)
else
Bx[nnz] = abs(pos_coeff * sval)
Expand Down
4 changes: 2 additions & 2 deletions src/strength.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ function (c::Classical)(At::SparseMatrixCSC{Tv,Ti}) where {Ti,Tv}
θ = c.θ

m, n = size(At)
T = copy(At)
T = real(copy(At))

for i = 1:n
_m = find_max_off_diag(T, i)
Expand Down Expand Up @@ -37,7 +37,7 @@ function (c::Classical)(At::SparseMatrixCSC{Tv,Ti}) where {Ti,Tv}
end

function find_max_off_diag(A, i)
m = zero(eltype(A))
m = real(zero(eltype(A)))
for j in nzrange(A, i)
row = A.rowval[j]
val = A.nzval[j]
Expand Down