HPL_pdupdateNN(3)

💖 HPL_pdupdateNN 💖

okay bestie, gather round, because we're about to talk about a function from HPL (that's the HPL Library Functions, if you're new here 🫶) and honestly? it's kind of a baddie. it does the broadcast-and-update thing and it does it well. no cap.

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✨ NAME ✨

HPL_pdupdateNN — broadcast a panel and update the trailing submatrix. that's it, that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

#include "hpl.h"

void HPL_pdupdateNN( HPL_T_panel * PBCST, int * IFLAG, HPL_T_panel *
PANEL, const int NN );

look at that signature. iconic. no notes. 😌

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🦋 DESCRIPTION 🦋

so here's the tea ☕ — HPL_pdupdateNN is out here doing two things at once like the multitasking queen she is:

• she broadcasts / forwards the panel PBCST
• and simultaneously applies the row interchanges and updates part of the trailing submatrix (using the panel PANEL)

literally doing the most, in the best way. main character energy fr fr. 🔥

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🎀 ARGUMENTS 🎀

• PBCST (local input/output) HPL_T_panel * — on entry, PBCST points to the data structure containing the panel (to be broadcast) information. she's the one getting sent out into the world ✈️✨
• IFLAG (local output) int * — on exit, IFLAG indicates whether or not the broadcast has been completed when PBCST is not NULL on entry. in that case, IFLAG is left unchanged. 👀
• PANEL (local input/output) HPL_T_panel * — on entry, PANEL points to the data structure containing the panel (to be updated) information. she's the one getting the glow-up 💅
• NN (local input) const int — on entry, NN specifies the local number of columns of the trailing submatrix to be updated starting at the current position. and bestie, listen: NN must be at least zero. don't be out here passing negative numbers, that's not the vibe 🙈

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🌈 SEE ALSO 🌈

the whole friend group, obviously:

• HPL_pdgesv (3)
• HPL_pdgesv0 (3)
• HPL_pdgesvK1 (3)
• HPL_pdgesvK2 (3)
• HPL_pdlaswp00N (3)
• HPL_pdlaswp01N (3)

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💀 reminder that this page is from HPL 2.2, dated February 24, 2016 — yes, she's been serving since 2016 and she's still eating. periodt. 👑

stay hydrated, read your man pages, and go update that trailing submatrix bestie 💖✨🎀🦋🌸💅🫶