la_lapack::la_gbamv Interface Reference

LA_GBAMV: performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y), or y := alpha*abs(A)**T*abs(x) + beta*abs(y), where alpha and beta are scalars, x and y are vectors and A is an m by n matrix. This function is primarily used in calculating error bounds. To protect against underflow during evaluation, components in the resulting vector are perturbed away from zero by (N+1) times the underflow threshold. To prevent unnecessarily large errors for block-structure embedded in general matrices, "symbolically" zero components are not perturbed. A zero entry is considered "symbolic" if all multiplications involved in computing that entry have at least one zero multiplicand. More...

Public Member Functions
subroutine	cla_gbamv (trans, m, n, kl, ku, alpha, ab, ldab, x, incx, beta, y, incy)
	la_cla_gbamv
subroutine	dla_gbamv (trans, m, n, kl, ku, alpha, ab, ldab, x, incx, beta, y, incy)
	la_dla_gbamv
	la_qla_gbamv
subroutine	sla_gbamv (trans, m, n, kl, ku, alpha, ab, ldab, x, incx, beta, y, incy)
	la_sla_gbamv
	la_wla_gbamv
subroutine	zla_gbamv (trans, m, n, kl, ku, alpha, ab, ldab, x, incx, beta, y, incy)
	la_zla_gbamv

Detailed Description

LA_GBAMV: performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y), or y := alpha*abs(A)**T*abs(x) + beta*abs(y), where alpha and beta are scalars, x and y are vectors and A is an m by n matrix. This function is primarily used in calculating error bounds. To protect against underflow during evaluation, components in the resulting vector are perturbed away from zero by (N+1) times the underflow threshold. To prevent unnecessarily large errors for block-structure embedded in general matrices, "symbolically" zero components are not perturbed. A zero entry is considered "symbolic" if all multiplications involved in computing that entry have at least one zero multiplicand.

Member Function/Subroutine Documentation

cla_gbamv()

subroutine la_lapack::la_gbamv::cla_gbamv	(	integer(ilp), intent(in)	trans,
		integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		integer(ilp), intent(in)	kl,
		integer(ilp), intent(in)	ku,
		real(sp), intent(in)	alpha,
		complex(sp), dimension(ldab,*), intent(in)	ab,
		integer(ilp), intent(in)	ldab,
		complex(sp), dimension(*), intent(in)	x,
		integer(ilp), intent(in)	incx,
		real(sp), intent(in)	beta,
		real(sp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy )

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dla_gbamv()

subroutine la_lapack::la_gbamv::dla_gbamv	(	integer(ilp), intent(in)	trans,
		integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		integer(ilp), intent(in)	kl,
		integer(ilp), intent(in)	ku,
		real(dp), intent(in)	alpha,
		real(dp), dimension(ldab,*), intent(in)	ab,
		integer(ilp), intent(in)	ldab,
		real(dp), dimension(*), intent(in)	x,
		integer(ilp), intent(in)	incx,
		real(dp), intent(in)	beta,
		real(dp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy )

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la_cla_gbamv()

la_lapack::la_gbamv::la_cla_gbamv

la_dla_gbamv()

la_lapack::la_gbamv::la_dla_gbamv

la_qla_gbamv()

la_lapack::la_gbamv::la_qla_gbamv

la_sla_gbamv()

la_lapack::la_gbamv::la_sla_gbamv

la_wla_gbamv()

la_lapack::la_gbamv::la_wla_gbamv

la_zla_gbamv()

la_lapack::la_gbamv::la_zla_gbamv

sla_gbamv()

subroutine la_lapack::la_gbamv::sla_gbamv	(	integer(ilp), intent(in)	trans,
		integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		integer(ilp), intent(in)	kl,
		integer(ilp), intent(in)	ku,
		real(sp), intent(in)	alpha,
		real(sp), dimension(ldab,*), intent(in)	ab,
		integer(ilp), intent(in)	ldab,
		real(sp), dimension(*), intent(in)	x,
		integer(ilp), intent(in)	incx,
		real(sp), intent(in)	beta,
		real(sp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy )

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zla_gbamv()

subroutine la_lapack::la_gbamv::zla_gbamv	(	integer(ilp), intent(in)	trans,
		integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		integer(ilp), intent(in)	kl,
		integer(ilp), intent(in)	ku,
		real(dp), intent(in)	alpha,
		complex(dp), dimension(ldab,*), intent(in)	ab,
		integer(ilp), intent(in)	ldab,
		complex(dp), dimension(*), intent(in)	x,
		integer(ilp), intent(in)	incx,
		real(dp), intent(in)	beta,
		real(dp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy )

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The documentation for this interface was generated from the following file:

• la_lapack.f90