BLAS/SRC/dswap.f(3)

💖 BLAS/SRC/dswap.f 💖

okay bestie, welcome to the LAPACK corner of the manual pages, this one's file is BLAS/SRC/dswap.f and it is lowkey iconic because it does ONE thing and does it flawlessly ✨

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✨ NAME ✨

BLAS/SRC/dswap.f — no cap, that's literally the whole name, she's a file, she's a legend, periodt 💅

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🌸 SYNOPSIS 🌸

Functions/Subroutines

• subroutine dswap (n, dx, incx, dy, incy) — the one and only DSWAP 🫶

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💜 Function/Subroutine Documentation 💜

subroutine dswap (integer n, double precision, dimension(*) dx, integer
    incx, double precision, dimension(*) dy, integer incy)

DSWAP — she's the main character, she's the whole point 👑

🎀 Purpose:

DSWAP interchanges two vectors. fr fr, that's it, that's the job 💫

and uses unrolled loops for increments equal to 1 — so when INCX and INCY are both 1, she stops being cute and starts being FAST 😤🔥

🦋 Parameters

• N — N is INTEGER. it's the number of elements in your input vector(s), like how many besties are in the group chat 💌
• DX — DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) ). one of the two vectors getting swapped, she's got range 💅
• INCX — INCX is INTEGER. the storage spacing between elements of DX — aka how far apart the girlies are sitting 🪑🪑
• DY — DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) ). the other vector, she's swapping places with DX, it's giving Freaky Friday 🎀
• INCY — INCY is INTEGER. the storage spacing between elements of DY ✨

🌈 Author

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

these four are the parents of this whole operation, respect them 🫶

💀 Further Details:

jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

so the origin story is jack dongarra, from linpack, dated 3/11/78 — a genuine vintage queen 👑 and then on 12/3/93 somebody came in and changed the array(1) declarations to array(*), glow-up complete 💖

Definition at line 81 of file dswap.f. 📍

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⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code. she didn't write herself, a robot did, and honestly? slay 🤖✨

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aaaand that's the whole page bestie!! 🌸 no notes, 10/10, she swaps vectors and she looks good doing it 🎀

this was Version 3.12.0, dated Tue Nov 28 2023 12:08:41, and the page you just read is BLAS/SRC/dswap.f(3) 💖 bye ily, go swap something 🫶✨