LAQPS: computes a step of QR factorization with column pivoting of a complex M-by-N matrix A by using Blas-3. It tries to factorize NB columns from A starting from the row OFFSET+1, and updates all of the matrix with Blas-3 xGEMM. In some cases, due to catastrophic cancellations, it cannot factorize NB columns. Hence, the actual number of factorized columns is returned in KB. Block A(1:OFFSET,1:N) is accordingly pivoted, but not factorized.
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| pure subroutine | claqps (m, n, offset, nb, kb, a, lda, jpvt, tau, vn1, vn2, auxv, f, ldf) |
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| | la_claqps |
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| pure subroutine | dlaqps (m, n, offset, nb, kb, a, lda, jpvt, tau, vn1, vn2, auxv, f, ldf) |
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| | la_dlaqps |
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| | la_qlaqps |
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| pure subroutine | slaqps (m, n, offset, nb, kb, a, lda, jpvt, tau, vn1, vn2, auxv, f, ldf) |
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| | la_slaqps |
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| | la_wlaqps |
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| pure subroutine | zlaqps (m, n, offset, nb, kb, a, lda, jpvt, tau, vn1, vn2, auxv, f, ldf) |
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| | la_zlaqps |
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LAQPS: computes a step of QR factorization with column pivoting of a complex M-by-N matrix A by using Blas-3. It tries to factorize NB columns from A starting from the row OFFSET+1, and updates all of the matrix with Blas-3 xGEMM. In some cases, due to catastrophic cancellations, it cannot factorize NB columns. Hence, the actual number of factorized columns is returned in KB. Block A(1:OFFSET,1:N) is accordingly pivoted, but not factorized.
◆ claqps()
| pure subroutine la_lapack::laqps::claqps |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
offset, |
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integer(ilp), intent(in) |
nb, |
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integer(ilp), intent(out) |
kb, |
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complex(sp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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integer(ilp), dimension(*), intent(inout) |
jpvt, |
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complex(sp), dimension(*), intent(out) |
tau, |
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real(sp), dimension(*), intent(inout) |
vn1, |
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real(sp), dimension(*), intent(inout) |
vn2, |
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complex(sp), dimension(*), intent(inout) |
auxv, |
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complex(sp), dimension(ldf,*), intent(inout) |
f, |
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integer(ilp), intent(in) |
ldf |
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◆ dlaqps()
| pure subroutine la_lapack::laqps::dlaqps |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
offset, |
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integer(ilp), intent(in) |
nb, |
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integer(ilp), intent(out) |
kb, |
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real(dp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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integer(ilp), dimension(*), intent(inout) |
jpvt, |
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real(dp), dimension(*), intent(out) |
tau, |
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real(dp), dimension(*), intent(inout) |
vn1, |
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real(dp), dimension(*), intent(inout) |
vn2, |
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real(dp), dimension(*), intent(inout) |
auxv, |
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real(dp), dimension(ldf,*), intent(inout) |
f, |
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integer(ilp), intent(in) |
ldf |
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) |
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◆ la_claqps()
| la_lapack::laqps::la_claqps |
◆ la_dlaqps()
| la_lapack::laqps::la_dlaqps |
◆ la_qlaqps()
| la_lapack::laqps::la_qlaqps |
◆ la_slaqps()
| la_lapack::laqps::la_slaqps |
◆ la_wlaqps()
| la_lapack::laqps::la_wlaqps |
◆ la_zlaqps()
| la_lapack::laqps::la_zlaqps |
◆ slaqps()
| pure subroutine la_lapack::laqps::slaqps |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
offset, |
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integer(ilp), intent(in) |
nb, |
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integer(ilp), intent(out) |
kb, |
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real(sp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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integer(ilp), dimension(*), intent(inout) |
jpvt, |
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real(sp), dimension(*), intent(out) |
tau, |
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real(sp), dimension(*), intent(inout) |
vn1, |
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real(sp), dimension(*), intent(inout) |
vn2, |
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real(sp), dimension(*), intent(inout) |
auxv, |
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real(sp), dimension(ldf,*), intent(inout) |
f, |
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integer(ilp), intent(in) |
ldf |
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) |
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◆ zlaqps()
| pure subroutine la_lapack::laqps::zlaqps |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
offset, |
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integer(ilp), intent(in) |
nb, |
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integer(ilp), intent(out) |
kb, |
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complex(dp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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integer(ilp), dimension(*), intent(inout) |
jpvt, |
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complex(dp), dimension(*), intent(out) |
tau, |
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real(dp), dimension(*), intent(inout) |
vn1, |
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real(dp), dimension(*), intent(inout) |
vn2, |
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complex(dp), dimension(*), intent(inout) |
auxv, |
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complex(dp), dimension(ldf,*), intent(inout) |
f, |
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integer(ilp), intent(in) |
ldf |
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) |
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The documentation for this interface was generated from the following file:
1.9.8