DCOPY(3)

✨ DCOPY(3) ✨

okay so bestie, welcome to DCOPY — it's a page from the LAPACK Library Functions Manual, and it's literally the most "copy-paste but make it math" situation ever 💅

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🎀 NAME 🎀

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

yep, that's the whole name, that's the whole path, and honestly? she said "I contain multitudes" and meant it 😭

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🌸 SYNOPSIS 🌸

Functions/Subroutines

• subroutine DCOPY (n, dx, incx, dy, incy) — DCOPY

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🦋 Function/Subroutine Documentation 🦋

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

DCOPY. That's her. That's the whole name. Iconic behavior, no notes ✨

💖 Purpose: 💖

!>
!>    DCOPY copies a vector, x, to a vector, y.
!>    uses unrolled loops for increments equal to 1.
!>

so she copies a vector, x, over to a vector, y — and when the increments equal 1 she uses unrolled loops, which is the computational equivalent of doing it with her eyes closed bc she's just that good 👑

🌈 Parameters 🌈

N

!>          N is INTEGER
!>         number of elements in input vector(s)
!>

it's an INTEGER, and it's the number of elements in your input vector(s). how many things are we copying? N. that's it. that's the number 🫶

DX

!>          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>

DX is a DOUBLE PRECISION array and her dimension is literally ( 1 + ( N - 1 )*abs( INCX ) ) — yes the abs matters, she's not playing games 💀

INCX

!>          INCX is INTEGER
!>         storage spacing between elements of DX
!>

INCX is an INTEGER and she's the storage spacing between elements of DX. the ~vibes~ between them, if you will 💅

DY

!>          DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
!>

DY is a DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) ). notice it's INCY and not INCX — read carefully bestie, these two are sisters not twins 🙈

INCY

!>          INCY is INTEGER
!>         storage spacing between elements of DY
!>

INCY is an INTEGER, the storage spacing between elements of DY. that's her whole job and she's slaying it 🎀

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👑 Author 👑

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

look at that group project actually getting finished, we love to see it 🫶✨

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💜 Further Details: 💜

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

shoutout jack dongarra, linpack, dated 3/11/78 — and then modified 12/3/93, array(1) declarations changed to array(*) which is giving "glow up, but make it type declarations" 💫

fr fr copy the dates exactly if you're citing her, 3/11/78 and 12/3/93, no cap 🧚

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⭐ Definition ⭐

Definition at line 81 of file dcopy.f.

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💀 lowkey reminder: DX and DY sizes are ( 1 + ( N - 1 )*abs( INCX ) ) and ( 1 + ( N - 1 )*abs( INCY ) ) respectively — they are NOT the same formula, do not swap them, I'm begging 🙈

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Generated automatically by Doxygen for LAPACK from the source code.

and that's the tea bestie — this page came straight out of LAPACK, Version 3.12.0, tied to /home/abui...SRC/dcopy.f(3), auto-generated by Doxygen and delivered to you with love 🍓💖✨