DCHKSY_AA_2STAGE(3)

💖 NAME 💖

okay so bestie, this is the dchksy_aa_2stage.f(3) page from the Library Functions Manual — manual-name drop handled right up top, as requested ✨. The file it points at is:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/dchksy_aa_2stage.f

That path is long enough to need its own emotional support water bottle 😭 but it is exactly what the page says.

🌸 SYNOPSIS 🌸

🎀 Functions/Subroutines 🎀

The synopsis serves up this subroutine realness:

subroutine DCHKSY_AA_2STAGE (dotype, nn, nval, nnb, nbval, nns, nsval,
    thresh, tsterr, nmax, a, afac, ainv, b, x, xact, work, rwork, iwork,
    nout)

and then it just says the name again like a little encore:

DCHKSY_AA_2STAGE

✨ Function/Subroutine Documentation ✨

Here’s the full documented signature, copied exactly because we do not play with literal code around here 💅:

subroutine DCHKSY_AA_2STAGE (logical, dimension( * ) dotype, integer nn,
    integer, dimension( * ) nval, integer nnb, integer, dimension( * )
    nbval, integer nns, integer, dimension( * ) nsval, double precision
    thresh, logical tsterr, integer nmax, double precision, dimension( * )
    a, double precision, dimension( * ) afac, double precision, dimension( *
    ) ainv, 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)

DCHKSY_AA_2STAGE

🦋 Purpose 🦋

The purpose is short and iconic: DCHKSY_AA_2STAGE tests DSYTRF_AA_2STAGE, -TRS_AA_2STAGE.

💜 Parameters 💜

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). The matrix types to be 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: the number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN): the values of the matrix dimension N.
• NNB — NNB is INTEGER: the number of values of NB contained in the vector NBVAL.
• NBVAL — NBVAL is INTEGER array, dimension (NNB): the values of the blocksize NB.
• NNS — NNS is INTEGER: the number of values of NRHS contained in the vector NSVAL.
• NSVAL — NSVAL is INTEGER array, dimension (NNS): the values of the number of right hand sides NRHS.
• 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.
• NMAX — NMAX is INTEGER: the maximum value permitted for N, used in dimensioning the work arrays.
• A — A is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AFAC — AFAC is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AINV — AINV is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• B — B is DOUBLE PRECISION array, dimension (NMAX*NSMAX), where NSMAX is the largest entry in NSVAL.
• X — X is DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• XACT — XACT is DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• WORK — WORK is DOUBLE PRECISION array, dimension (NMAX*max(3,NSMAX)).
• RWORK — RWORK is DOUBLE PRECISION array, dimension (max(NMAX,2*NSMAX)).
• 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 168 of file dchksy_aa_2stage.f.

💫 Author 💫

Generated automatically by Doxygen for LAPACK from the source code.

---

okay that’s the whole page, bestie 🫶 — it’s from LAPACK, Version 3.12.0, and the footer path is exactly /home/abui...aa_2stage.f(3). The page didn’t print a date, so I’m not inventing one 💀. Periodt. 💅