TESTING/LIN/ddrvsyx.f(3)

💅 TESTING/LIN/ddrvsyx.f(3) — the whole manual page, bestie

okay so this is the manual page for TESTING/LIN/ddrvsyx.f(3), and honestly? it's giving "test driver for the symmetric solvers" and I'm obsessed. it's a Fortran file, it's part of LAPACK, and it's here to put DSYSV, -SVX and -SVXX through their paces. let's get into it 🎀

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✨ NAME ✨

TESTING/LIN/ddrvsyx.f — like, that's literally the name, no notes 💅

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🦋 SYNOPSIS 🦋

Functions/Subroutines

subroutine ddrvsy (dotype, nn, nval, nrhs, thresh, tsterr, nmax, a,
    afac, ainv, b, x, xact, work, rwork, iwork, nout)

DDRVSYX — that's the whole vibe check right there 👑

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🌸 Function/Subroutine Documentation 🌸

subroutine ddrvsy

here's the full signature with all the types spelled out, because past-me needed them and future-you will too 🫶:

subroutine ddrvsy (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nrhs, 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)

DDRVSYX ⭐

🎯 Purpose

DDRVSY tests the driver routines DSYSV, -SVX, and -SVXX.

note that this file is used only when the XBLAS are available, otherwise ddrvsy.f defines this subroutine.

like... the x in ddrvsyx.f is doing a LOT of heavy lifting, iykyk 😭 it's the XBLAS-flavoured twin of ddrvsy.f.

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🧚 Parameters 🧚

every single one, bestie, no skipping, we don't do that here 💖

• DOTYPE — LOGICAL array, dimension (NTYPES). these are the matrix types we're testing with. matrices of type j (for 1 <= j <= NTYPES) get used for testing if DOTYPE(j) = .TRUE.; if DOTYPE(j) = .FALSE., then type j is literally not invited to the party 🙈
• NN — INTEGER. the number of values of N contained in the vector NVAL. periodt.
• NVAL — INTEGER array, dimension (NN). these are the values of the matrix dimension N. the main characters, honestly 👑
• NRHS — INTEGER. how many right hand side vectors get generated for each linear system. slay.
• THRESH — DOUBLE PRECISION. the threshold value for the test ratios. a result gets included in the output file if RESULT >= THRESH. and if you want every test ratio printed? use THRESH = 0. no cap.
• TSTERR — LOGICAL. flag that says whether error exits are to be tested. 💀 yes we test the failures too.
• NMAX — INTEGER. the maximum value permitted for N, used in dimensioning the work arrays. the ceiling, the limit, the boundary ✨
• A — DOUBLE PRECISION array, dimension (NMAX*NMAX). 🦋
• AFAC — DOUBLE PRECISION array, dimension (NMAX*NMAX). 🦋
• AINV — DOUBLE PRECISION array, dimension (NMAX*NMAX). 🦋
• B — DOUBLE PRECISION array, dimension (NMAX*NRHS). 🍓
• X — DOUBLE PRECISION array, dimension (NMAX*NRHS). 🍓
• XACT — DOUBLE PRECISION array, dimension (NMAX*NRHS). 🍓
• WORK — DOUBLE PRECISION array, dimension (NMAX*max(2,NRHS)). like, note the max(2,NRHS) — it never goes below 2, bestie, that's the rule 🎀
• RWORK — DOUBLE PRECISION array, dimension (NMAX+2*NRHS). 🌈
• IWORK — INTEGER array, dimension (2*NMAX). the integers get their own space, as they deserve 💜
• NOUT — INTEGER. the unit number for output. where the receipts get printed, fr fr.

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👑 Author 👑

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

legends, all of them, we stan 🫶

Definition at line 153 of file ddrvsyx.f. ⭐

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💫 Author (again, the meta one) 💫

Generated automatically by Doxygen for LAPACK from the source code. not a human, just a little robot doing its thing 🤖✨

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so yeah, that's the whole page — nestled inside LAPACK, Version 3.12.0, filed under TESTING/LIN/ddrvsyx.f(3). that's the header and the footer accounted for, and honestly? iconic. go test those symmetric drivers, bestie, and remember: THRESH = 0 if you want it all printed 💖🎀🦋