DLAG2S(3)

🦋 DLAG2S(3) — the glow-up from double to single, bestie 🎀

okay so real talk, this page lives in the LAPACK manual (Library Functions Manual), and it's all about /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/dlag2s.f 💖 — like, that's literally the file, no cap.

---

✨ NAME ✨

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/dlag2s.f — yes that's the whole name, she's extra, she's iconic, we respect it 👑

---

🌸 SYNOPSIS 🌸

Functions/Subroutines

• subroutine DLAG2S (m, n, a, lda, sa, ldsa, info) — DLAG2S converts a double precision matrix to a single precision matrix. that's it, that's the whole vibe 💅

---

💜 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. slay ✨

🧚 Purpose

• DLAG2S converts a DOUBLE PRECISION matrix, A, to a SINGLE PRECISION matrix, SA.
• RMAX is the overflow for the SINGLE PRECISION arithmetic. DLAG2S 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 🙈 (yes, she trusts you, don't make it weird)

🎀 Parameters

• M — M is INTEGER. The number of lines of the matrix A. M >= 0.
• N — N is INTEGER. The number of columns of the matrix A. N >= 0.
• A — A is DOUBLE PRECISION array, dimension (LDA,N). On entry, the M-by-N coefficient matrix A.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M).
• SA — SA is REAL array, dimension (LDSA,N). On exit, if INFO=0, the M-by-N coefficient matrix SA; if INFO>0, the content of SA is unspecified 😭 (she didn't finish, don't look at her).
• LDSA — LDSA is INTEGER. The leading dimension of the array SA. 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 on exit is unspecified 💀

👑 Author

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

the whole squad showed up, we love a collab 🫶

⭐ Definition

Definition at line 107 of file dlag2s.f.

---

🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code. (not me writing this by hand, the robots did it, iykyk 🤖)

---

heads up bestie: INFO = 1 is the one to watch — if any entry of A blows past the single precision overflow threshold, the conversion stops and SA is left unspecified. no silent bad data, but also no data, so check that flag fr fr 🔥

---

LAPACK · Version 3.12.0 · /home/abui...RC/dlag2s.f(3) — mwah, catch you in the next page 💋🦋🍓