DLAT2S(3)

🌸 NAME 🌸

okay so this is the DLAT2S(3) page from the Library Functions Manual 💖 — very LAPACK helper-routine energy, very "I live in SRC/" vibes. The NAME block is literally this source path, no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/dlat2s.f

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✨ SYNOPSIS ✨

Functions/Subroutines 🎀

subroutine DLAT2S (uplo, n, a, lda, sa, ldsa, info)
    DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.

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💅 Function/Subroutine Documentation 💅

okay bestie, here's the actual signature, copied exactly because we do not mess with code:

subroutine DLAT2S (character uplo, integer n, double precision, dimension(
    lda, * ) a, integer lda, real, dimension( ldsa, * ) sa, integer ldsa,
    integer info)

DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix. slay. 💫

🔥 Purpose 🔥

Purpose tea, bestie: DLAT2S converts a DOUBLE PRECISION triangular matrix to a SINGLE PRECISION triangular matrix. The source's purpose block literally says DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE PRECISION triangular matrix, A. — yes, exactly like that, I am not editing it, periodt.

RMAX is the overflow for the SINGLE PRECISION arithmetic. The source spells the checker DLAS2S right there (not a typo I invented, bestie 🙈): it checks that all the entries of A are between -RMAX and RMAX. If not, the conversion is aborted and a flag is raised. 🚩

This is an auxiliary routine so there is no argument checking. No vibe check on the args, literally none. 💀

🎀 Parameters 🎀

• UPLO — CHARACTER*1. = 'U': A is upper triangular; = 'L': A is lower triangular.
• N — INTEGER. The number of rows and columns of the matrix A. N >= 0.
• A — DOUBLE PRECISION array, dimension (LDA,N). On entry, the N-by-N triangular coefficient matrix A.
• LDA — INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• SA — REAL array, dimension (LDSA,N). Only the UPLO part of SA is referenced. On exit, if INFO=0, the N-by-N coefficient matrix SA; if INFO>0, the content of the UPLO part of SA is unspecified.
• LDSA — INTEGER. The leading dimension of the array SA. LDSA >= max(1,M). Yes, M — that is literally what the page says, bestie. 🙈
• INFO — INTEGER. = 0: successful exit. = 1: an entry of the matrix A is greater than the SINGLE PRECISION overflow threshold, in this case, the content of the UPLO part of SA in exit is unspecified.

👑 Author 👑

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

📌 Definition 📌

Definition at line 110 of file dlat2s.f.

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🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

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🎀 and that's the page, bestie! Footer sign-off tea: LAPACK Version 3.12.0 and the path /home/abui...RC/dlat2s.f(3) — literally the whole footer vibe, no date line to speak of. Byeee! 🫶💜