LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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dget32.f File Reference

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Functions/Subroutines

subroutine dget32 (RMAX, LMAX, NINFO, KNT)
 DGET32 More...
 

Function/Subroutine Documentation

subroutine dget32 ( double precision  RMAX,
integer  LMAX,
integer  NINFO,
integer  KNT 
)

DGET32

Purpose:
 DGET32 tests DLASY2, a routine for solving

         op(TL)*X + ISGN*X*op(TR) = SCALE*B

 where TL is N1 by N1, TR is N2 by N2, and N1,N2 =1 or 2 only.
 X and B are N1 by N2, op() is an optional transpose, an
 ISGN = 1 or -1. SCALE is chosen less than or equal to 1 to
 avoid overflow in X.

 The test condition is that the scaled residual

 norm( op(TL)*X + ISGN*X*op(TR) = SCALE*B )
      / ( max( ulp*norm(TL), ulp*norm(TR)) * norm(X), SMLNUM )

 should be on the order of 1. Here, ulp is the machine precision.
 Also, it is verified that SCALE is less than or equal to 1, and
 that XNORM = infinity-norm(X).
Parameters
[out]RMAX
          RMAX is DOUBLE PRECISION
          Value of the largest test ratio.
[out]LMAX
          LMAX is INTEGER
          Example number where largest test ratio achieved.
[out]NINFO
          NINFO is INTEGER
          Number of examples returned with INFO.NE.0.
[out]KNT
          KNT is INTEGER
          Total number of examples tested.
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date
November 2011

Definition at line 83 of file dget32.f.

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