SRC/dlag2s.f(3)

📦
version 3.12.1 · 5 versions
, in arch rolling

okay bestie, welcome to SRC/dlag2s.f(3) — this is a Library Functions Manual page, and it's giving tiny LAPACK helper doing a double-to-single precision glow-down. 💅✨

🌸 NAME 🌸

SRC/dlag2s.f

✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

subroutine dlag2s (m, n, a, lda, sa, ldsa, info)

DLAG2S converts a double precision matrix to a single precision matrix. 💖

🌟 Function/Subroutine Documentation 🌟

subroutine dlag2s (integer m, integer n, double precision, dimension( lda, *
    ) a, integer lda, real, dimension( ldsa, * ) sa, integer ldsa, integer
    info)

DLAG2S converts a double precision matrix to a single precision matrix. 🦋

💖 Purpose 💖

Okay so DLAG2S converts a DOUBLE PRECISION matrix, A, into a SINGLE PRECISION matrix, SA. 💫

RMAX is the overflow for the SINGLE PRECISION arithmetic, and DLAG2S checks that all the entries of A are between -RMAX and RMAX. If they're not, the conversion is aborted and a flag is raised. 🚩

This is an auxiliary routine, so there is no argument checking. iykyk. 🙈

🌈 Parameters 🌈

  • M — M is INTEGER; it's the number of lines of the matrix A, and M >= 0. ✨
  • N — N is INTEGER; it's the number of columns of the matrix A, and N >= 0. ✨
  • A — A is DOUBLE PRECISION array, dimension (LDA,N). On entry, it's the M-by-N coefficient matrix A. 💖
  • LDA — LDA is INTEGER; it's the leading dimension of the array A, and LDA >= max(1,M). 🎀
  • SA — SA is REAL array, dimension (LDSA,N). On exit, if INFO=0, it's the M-by-N coefficient matrix SA; if INFO>0, the content of SA is unspecified. 😭
  • LDSA — LDSA is INTEGER; it's the leading dimension of the array SA, and LDSA >= max(1,M). 🎀
  • INFO — INFO is 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 SA in exit is unspecified. 💀

👑 Author 👑

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

Definition at line 107 of file dlag2s.f. 📍

🦋 Author 🦋

Generated automatically by Doxygen for LAPACK from the source code. 🤖

okay that's the whole page, bestie. from LAPACK Version 3.12.0, page SRC/dlag2s.f(3). mwah 💋✨

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