BLAS/SRC/dcopy.f(3)

💖 BLAS/SRC/dcopy.f(3) — the LAPACK manual, but make it make sense 💖

okay bestie, sit down, hydrate, and let me tell you about the most lowkey iconic little subroutine in the whole BLAS lineup: dcopy. it lives in the LAPACK manual under BLAS/SRC/dcopy.f(3), and honestly? it's giving "does one thing and does it flawlessly." 🦋

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✨ NAME ✨

BLAS/SRC/dcopy.f — that's the file, that's the vibe, that's the whole thing. 💅

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🌸 SYNOPSIS 🌸

Functions/Subroutines

subroutine dcopy (n, dx, incx, dy, incy)

DCOPY — she's a subroutine, she takes five arguments, she does not elaborate. 👑

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🎀 Function/Subroutine Documentation 🎀

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

DCOPY 💜

💫 Purpose 💫

DCOPY copies a vector, x, to a vector, y.

and the tea? it uses unrolled loops for increments equal to 1. so when your spacing is exactly 1, she's zooming. no cap. 🔥

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🌈 Parameters 🌈

• N — N is INTEGER, and she is the number of elements in the input vector(s). like, how many lil guys are we moving today, bestie.
• DX — DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) ). this is your source vector, the one getting copied from. 🫶
• INCX — INCX is INTEGER, and it's the storage spacing between elements of DX. basically: how far apart are we hopping through DX? 🐇
• DY — DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) ). this is your destination vector, the one everything lands in. ✨
• INCY — INCY is INTEGER, the storage spacing between elements of DY. same deal as INCX but for the destination. 🎯

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👑 Author 👑

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

the whole squad really showed up for this one. respect. 🌟

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🧚 Further Details 🧚

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

so yeah — jack dongarra, linpack, dated 3/11/78, and then a lil glow-up on 12/3/93 where the array(1) declarations got changed to array(*). a historic makeover moment, fr fr. 💅

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📍 Definition 📍

Definition at line 81 of file dcopy.f.

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⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code. (yes, even the docs have main character energy and generate themselves. we love an independent queen. 👑)

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Version 3.12.0 · Tue Nov 28 2023 12:08:41 · BLAS/SRC/dcopy.f(3)

and that's the whole page, bestie!! 💖 go forth, copy your vectors, respect the INCX and INCY spacing, and remember: increments equal to 1 get the unrolled-loop treatment because she's that girl. slay, periodt, mwah 🎀✨🦋