sgetrs
sgetrs - solve a system of linear equations A * X = B or A' * X = B with a general N-by-N matrix A using the LU factorization computed by SGETRF
SUBROUTINE SGETRS( TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO)
CHARACTER * 1 TRANSA
INTEGER N, NRHS, LDA, LDB, INFO
INTEGER IPIVOT(*)
REAL A(LDA,*), B(LDB,*)
SUBROUTINE SGETRS_64( TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO)
CHARACTER * 1 TRANSA
INTEGER*8 N, NRHS, LDA, LDB, INFO
INTEGER*8 IPIVOT(*)
REAL A(LDA,*), B(LDB,*)
SUBROUTINE GETRS( [TRANSA], [N], [NRHS], A, [LDA], IPIVOT, B, [LDB],
* [INFO])
CHARACTER(LEN=1) :: TRANSA
INTEGER :: N, NRHS, LDA, LDB, INFO
INTEGER, DIMENSION(:) :: IPIVOT
REAL, DIMENSION(:,:) :: A, B
SUBROUTINE GETRS_64( [TRANSA], [N], [NRHS], A, [LDA], IPIVOT, B,
* [LDB], [INFO])
CHARACTER(LEN=1) :: TRANSA
INTEGER(8) :: N, NRHS, LDA, LDB, INFO
INTEGER(8), DIMENSION(:) :: IPIVOT
REAL, DIMENSION(:,:) :: A, B
#include <sunperf.h>
void sgetrs(char transa, int n, int nrhs, float *a, int lda, int *ipivot, float *b, int ldb, int *info);
void sgetrs_64(char transa, long n, long nrhs, float *a, long lda, long *ipivot, float *b, long ldb, long *info);
sgetrs solves a system of linear equations
A * X = B or A' * X = B
with a general N-by-N matrix A using the LU factorization computed
by SGETRF.
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* TRANSA (input)
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Specifies the form of the system of equations:
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* N (input)
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The order of the matrix A. N >= 0.
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* NRHS (input)
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The number of right hand sides, i.e., the number of columns
of the matrix B. NRHS >= 0.
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* A (input)
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The factors L and U from the factorization A = P*L*U
as computed by SGETRF.
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* LDA (input)
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The leading dimension of the array A. LDA >= max(1,N).
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* IPIVOT (input)
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The pivot indices from SGETRF; for 1<=i<=N, row i of the
matrix was interchanged with row IPIVOT(i).
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* B (input/output)
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On entry, the right hand side matrix B.
On exit, the solution matrix X.
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* LDB (input)
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The leading dimension of the array B. LDB >= max(1,N).
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* INFO (output)
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