clarfx.f(3) LAPACK clarfx.f(3)NAMEclarfx.f-
subroutine clarfx (SIDE, M, N, V, TAU, C, LDC, WORK)
CLARFX applies an elementary reflector to a general rectangular
matrix, with loop unrolling when the reflector has order ≤ 10.
subroutine clarfx (characterSIDE, integerM, integerN, complex, dimension( *
)V, complexTAU, complex, dimension( ldc, * )C, integerLDC, complex,
dimension( * )WORK)
CLARFX applies an elementary reflector to a general rectangular matrix,
with loop unrolling when the reflector has order ≤ 10.
CLARFX applies a complex elementary reflector H to a complex m by n
matrix C, from either the left or the right. H is represented in the
H = I - tau * v * v**H
where tau is a complex scalar and v is a complex vector.
If tau = 0, then H is taken to be the unit matrix
This version uses inline code if H has order < 11.
SIDE is CHARACTER*1
= 'L': form H * C
= 'R': form C * H
M is INTEGER
The number of rows of the matrix C.
N is INTEGER
The number of columns of the matrix C.
V is COMPLEX array, dimension (M) if SIDE = 'L'
or (N) if SIDE = 'R'
The vector v in the representation of H.
TAU is COMPLEX
The value tau in the representation of H.
C is COMPLEX array, dimension (LDC,N)
On entry, the m by n matrix C.
On exit, C is overwritten by the matrix H * C if SIDE = 'L',
or C * H if SIDE = 'R'.
LDC is INTEGER
The leading dimension of the array C. LDA >= max(1,M).
WORK is COMPLEX array, dimension (N) if SIDE = 'L'
or (M) if SIDE = 'R'
WORK is not referenced if H has order < 11.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
Definition at line 120 of file clarfx.f.
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 clarfx.f(3)