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- CCCCLLLLAAAARRRRFFFFBBBB((((3333SSSS)))) CCCCLLLLAAAARRRRFFFFBBBB((((3333SSSS))))
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- CLARFB - applie a complex block reflector H or its transpose H' to a
- complex M-by-N matrix C, from either the left or the right
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- SUBROUTINE CLARFB( SIDE, TRANS, DIRECT, STOREV, M, N, K, V, LDV, T, LDT,
- C, LDC, WORK, LDWORK )
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- CHARACTER DIRECT, SIDE, STOREV, TRANS
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- INTEGER K, LDC, LDT, LDV, LDWORK, M, N
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- COMPLEX C( LDC, * ), T( LDT, * ), V( LDV, * ), WORK( LDWORK, *
- )
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- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
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- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CLARFB applies a complex block reflector H or its transpose H' to a
- complex M-by-N matrix C, from either the left or the right.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- SIDE (input) CHARACTER*1
- = 'L': apply H or H' from the Left
- = 'R': apply H or H' from the Right
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- TRANS (input) CHARACTER*1
- = 'N': apply H (No transpose)
- = 'C': apply H' (Conjugate transpose)
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- DIRECT (input) CHARACTER*1
- Indicates how H is formed from a product of elementary reflectors
- = 'F': H = H(1) H(2) . . . H(k) (Forward)
- = 'B': H = H(k) . . . H(2) H(1) (Backward)
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- STOREV (input) CHARACTER*1
- Indicates how the vectors which define the elementary reflectors
- are stored:
- = 'C': Columnwise
- = 'R': Rowwise
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- M (input) INTEGER
- The number of rows of the matrix C.
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- N (input) INTEGER
- The number of columns of the matrix C.
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- K (input) INTEGER
- The order of the matrix T (= the number of elementary reflectors
- whose product defines the block reflector).
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- V (input) COMPLEX array, dimension
- (LDV,K) if STOREV = 'C' (LDV,M) if STOREV = 'R' and SIDE = 'L'
- (LDV,N) if STOREV = 'R' and SIDE = 'R' The matrix V. See further
- details.
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- LDV (input) INTEGER
- The leading dimension of the array V. If STOREV = 'C' and SIDE =
- 'L', LDV >= max(1,M); if STOREV = 'C' and SIDE = 'R', LDV >=
- max(1,N); if STOREV = 'R', LDV >= K.
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- T (input) COMPLEX array, dimension (LDT,K)
- The triangular K-by-K matrix T in the representation of the block
- reflector.
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- LDT (input) INTEGER
- The leading dimension of the array T. LDT >= K.
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- C (input/output) COMPLEX array, dimension (LDC,N)
- On entry, the M-by-N matrix C. On exit, C is overwritten by H*C
- or H'*C or C*H or C*H'.
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- LDC (input) INTEGER
- The leading dimension of the array C. LDC >= max(1,M).
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- WORK (workspace) COMPLEX array, dimension (LDWORK,K)
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- LDWORK (input) INTEGER
- The leading dimension of the array WORK. If SIDE = 'L', LDWORK
- >= max(1,N); if SIDE = 'R', LDWORK >= max(1,M).
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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- PPPPaaaaggggeeee 2222
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