TESTING/LIN/dchkgb.f(3)

🎀 NAME 🎀

TESTING/LIN/dchkgb.f — okay bestie, this is the Library Functions Manual page for the dchkgb file, and the main-character subroutine is DCHKGB 🫶. It’s giving “test harness but make it iconic.”

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✨ SYNOPSIS ✨

🌸 Functions/Subroutines 🌸

subroutine dchkgb (dotype, nm, mval, nn, nval, nnb, nbval, nns, nsval,
           thresh, tsterr, a, la, afac, lafac, b, x, xact, work, rwork, iwork,
           nout)
           DCHKGB

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💖 Function/Subroutine Documentation 💖

Here’s the full signature, exactly as it is — no renaming, no “fixing,” no editing the vibes:

subroutine dchkgb (logical, dimension( * ) dotype, integer nm, integer,
       dimension( * ) mval, integer nn, integer, dimension( * ) nval, integer
       nnb, integer, dimension( * ) nbval, integer nns, integer, dimension( * )
       nsval, double precision thresh, logical tsterr, double precision,
       dimension( * ) a, integer la, double precision, dimension( * ) afac,
       integer lafac, double precision, dimension( * ) b, double precision,
       dimension( * ) x, double precision, dimension( * ) xact, double
       precision, dimension( * ) work, double precision, dimension( * ) rwork,
       integer, dimension( * ) iwork, integer nout)
       DCHKGB

And yes, the name is DCHKGB — we love a consistent entrance. 💅

🎯 Purpose 🎯

Okay so the whole point: DCHKGB tests DGBTRF, -TRS, -RFS, and -CON. Periodt. 🦋

📋 Parameters 📋

Every parameter, zero skips, all facts intact:

• DOTYPE — LOGICAL array, dimension (NTYPES). This is the “which matrix types are we testing” list. Matrices of type j (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.
• NM — INTEGER. The number of values of M contained in the vector MVAL.
• MVAL — INTEGER array, dimension (NM). The values of the matrix row dimension M.
• NN — INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — INTEGER array, dimension (NN). The values of the matrix column dimension N.
• NNB — INTEGER. The number of values of NB contained in the vector NBVAL.
• NBVAL — INTEGER array, dimension (NNB). The values of the blocksize NB.
• NNS — INTEGER. The number of values of NRHS contained in the vector NSVAL.
• NSVAL — INTEGER array, dimension (NNS). The values of the number of right hand sides NRHS.
• THRESH — DOUBLE PRECISION. The threshold value for the test ratios. A result is included in the output file if RESULT >= THRESH. To have every test ratio printed, use THRESH = 0.
• TSTERR — LOGICAL. Flag that indicates whether error exits are to be tested.
• A — DOUBLE PRECISION array, dimension (LA).
• LA — INTEGER. The length of the array A. Constraint: LA >= (KLMAX+KUMAX+1)*NMAX, where KLMAX is the largest entry in the local array KLVAL, KUMAX is the largest entry in the local array KUVAL and NMAX is the largest entry in the input array NVAL.
• AFAC — DOUBLE PRECISION array, dimension (LAFAC).
• LAFAC — INTEGER. The length of the array AFAC. Constraint: LAFAC >= (2*KLMAX+KUMAX+1)*NMAX, where KLMAX is the largest entry in the local array KLVAL, KUMAX is the largest entry in the local array KUVAL and NMAX is the largest entry in the input array NVAL.
• B — DOUBLE PRECISION array, dimension (NMAX*NSMAX), where NSMAX is the largest entry in NSVAL.
• X — DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• XACT — DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• WORK — DOUBLE PRECISION array, dimension (NMAX*max(3,NSMAX,NMAX)).
• RWORK — DOUBLE PRECISION array, dimension (NMAX+2*NSMAX).
• IWORK — INTEGER array, dimension (2*NMAX).
• NOUT — INTEGER. The unit number for output.

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🫶 Author 🫶

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 188 of file dchkgb.f.

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🫶 Author 🫶

Generated automatically by Doxygen for LAPACK from the source code.

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Okay that’s the whole page, bestie. Source/version footer moment: LAPACK Version 3.12.0, page TESTING/LIN/dchkgb.f(3). Slay. 💅✨