SGET32(3)

okay so this is the sget32.f(3) page from the Library Functions Manual — buckle up bestie, we're doing LAPACK test-routine lore 💖

🌸 NAME 🌸

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/EIG/sget32.f

🦋 SYNOPSIS 🦋

Functions/Subroutines

subroutine SGET32 (rmax, lmax, ninfo, knt)
    SGET32

💅 Function/Subroutine Documentation 💅

subroutine SGET32 (real rmax, integer lmax, integer ninfo, integer knt)

SGET32

Purpose

Okay so the purpose is SGET32 tests SLASY2, a routine for solving

op(TL)*X + ISGN*X*op(TR) = SCALE*B

where TL is N1 by N1, TR is N2 by N2, and N1,N2 =1 or 2 only. X and B are N1 by N2, op() is an optional transpose, an ISGN = 1 or -1. SCALE is chosen less than or equal to 1 to avoid overflow in X.

The test condition is that the scaled residual

norm( op(TL)*X + ISGN*X*op(TR) = SCALE*B )
     / ( max( ulp*norm(TL), ulp*norm(TR)) * norm(X), SMLNUM )

should be on the order of 1. Here, ulp is the machine precision. Also, it is verified that SCALE is less than or equal to 1, and that XNORM = infinity-norm(X).

Parameters

• RMAX — RMAX is REAL; value of the largest test ratio. 🔥
• LMAX — LMAX is INTEGER; example number where largest test ratio achieved. 👑
• NINFO — NINFO is INTEGER; number of examples returned with INFO.NE.0. 😭
• KNT — KNT is INTEGER; total number of examples tested. ✨

Author

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

Definition at line 81 of file sget32.f.

Author

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