TESTING/LIN/sdrvgbx.f(3)

💅 TESTING/LIN/sdrvgbx.f 💅

okay so this is TESTING/LIN/sdrvgbx.f, and the manual name folded in near the top is Library Functions Manual — yes bestie, that's the whole header vibe, no need to copy the header line. It's a LAPACK test-driver page and it's lowkey iconic. 🫶

🌸 NAME 🌸

TESTING/LIN/sdrvgbx.f

✨ SYNOPSIS ✨

Functions/Subroutines

   subroutine sdrvgb (dotype, nn, nval, nrhs, thresh, tsterr, a, la, afb,
       lafb, asav, b, bsav, x, xact, s, work, rwork, iwork, nout)
       SDRVGBX

🦋 Function/Subroutine Documentation 🦋

okay bestie, here's the actual subroutine in all its typed-signature glory:

   subroutine sdrvgb (logical, dimension( * ) dotype, integer nn, integer,
       dimension( * ) nval, integer nrhs, real thresh, logical tsterr, real,
       dimension( * ) a, integer la, real, dimension( * ) afb, integer lafb,
       real, dimension( * ) asav, real, dimension( * ) b, real, dimension( * )
       bsav, real, dimension( * ) x, real, dimension( * ) xact, real,
       dimension( * ) s, real, dimension( * ) work, real, dimension( * ) rwork,
       integer, dimension( * ) iwork, integer nout)
       SDRVGBX

🎯 Purpose

SDRVGB tests the driver routines SGBSV, -SVX, and -SVXX.

Note that this file is used only when the XBLAS are available; otherwise sdrvgb.f defines this subroutine.

🎀 Parameters

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). These are the matrix types used for testing. 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.
• NN — NN is INTEGER. It's the number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN). These are the values of the matrix column dimension N.
• NRHS — NRHS is INTEGER. It's the number of right hand side vectors to be generated for each linear system.
• THRESH — THRESH is REAL. This is 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 — TSTERR is LOGICAL. This flag says whether error exits are to be tested.
• A — A is REAL array, dimension (LA).
• LA — LA is INTEGER. It's the length of the array A. LA >= (2*NMAX-1)*NMAX where NMAX is the largest entry in NVAL.
• AFB — AFB is REAL array, dimension (LAFB).
• LAFB — LAFB is INTEGER. It's the length of the array AFB. LAFB >= (3*NMAX-2)*NMAX where NMAX is the largest entry in NVAL.
• ASAV — ASAV is REAL array, dimension (LA).
• B — B is REAL array, dimension (NMAX*NRHS).
• BSAV — BSAV is REAL array, dimension (NMAX*NRHS).
• X — X is REAL array, dimension (NMAX*NRHS).
• XACT — XACT is REAL array, dimension (NMAX*NRHS).
• S — S is REAL array, dimension (2*NMAX).
• WORK — WORK is REAL array, dimension (NMAX*max(3,NRHS,NMAX)).
• RWORK — RWORK is REAL array, dimension (max(2*NMAX,NMAX+2*NRHS)).
• IWORK — IWORK is INTEGER array, dimension (2*NMAX).
• NOUT — NOUT is INTEGER. It's the unit number for output.

👑 Author

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

Definition at line 172 of file sdrvgbx.f.

👑 Author

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