TESTING/LIN/ddrvgbx.f(3)

NAME 💅

okay so bestie, welcome to TESTING/LIN/ddrvgbx.f — this is the Library Functions Manual page for it, and the name is literally just that path. No cap.

SYNOPSIS 🌈

Functions/Subroutines 🫶

Here's the subroutine list, and it's giving one very specific function:

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

Function/Subroutine Documentation ✨

The full signature is here, character for character, because we do not fudge the details:

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

Purpose 🎯

!>
!> DDRVGB tests the driver routines DGBSV, -SVX, and -SVXX.
!>
!> Note that this file is used only when the XBLAS are available,
!> otherwise ddrvgb.f defines this subroutine.
!>

Translation from comment-speak: DDRVGB tests the driver routines DGBSV, -SVX, and -SVXX. Big note, bestie: this file is used only when the XBLAS are available — otherwise ddrvgb.f defines this subroutine.

⚠️ XBLAS check: if the XBLAS are not available, ddrvgb.f is the file that defines this subroutine. That's the vibe check.

Parameters 📋

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). It's the matrix-types-to-use menu: matrices of type j (for 1 <= j <= NTYPES) get tested if DOTYPE(j) = .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used. Literally a yes/no list, bestie.
• NN — NN is INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN). The values of the matrix column dimension N.
• NRHS — NRHS is INTEGER. The number of right hand side vectors to be generated for each linear system.
• THRESH — THRESH is 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 — TSTERR is LOGICAL. Flag that indicates whether error exits are to be tested.
• A — A is DOUBLE PRECISION array, dimension (LA).
• LA — LA is INTEGER. The length of the array A. LA >= (2*NMAX-1)*NMAX where NMAX is the largest entry in NVAL.
• AFB — AFB is DOUBLE PRECISION array, dimension (LAFB).
• LAFB — LAFB is INTEGER. The length of the array AFB. LAFB >= (3*NMAX-2)*NMAX where NMAX is the largest entry in NVAL.
• ASAV — ASAV is DOUBLE PRECISION array, dimension (LA).
• B — B is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• BSAV — BSAV is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• X — X is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• XACT — XACT is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• S — S is DOUBLE PRECISION array, dimension (2*NMAX).
• WORK — WORK is DOUBLE PRECISION array, dimension (NMAX*max(3,NRHS,NMAX)).
• RWORK — RWORK is DOUBLE PRECISION array, dimension (max(2*NMAX,NMAX+2*NRHS)).
• IWORK — IWORK is INTEGER array, dimension (2*NMAX).
• NOUT — NOUT is INTEGER. 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 ddrvgbx.f.

Author ✨

Generated automatically by Doxygen for LAPACK from the source code.

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and that's the page, bestie 🫶 — LAPACK Version 3.12.0, TESTING/LIN/ddrvgbx.f(3), generated from the source code. The original footer doesn't give a date, so I'm not inventing one — periodt 💅.