BLAS/SRC/ddot.f(3)

💅 BLAS/SRC/ddot.f(3) — Library Functions Manual 🎀

okay bestie, so this page lives in the manual for BLAS/SRC/ddot.f (that's the manual name, iykyk) and it's literally all about one tiny icon of a Fortran function. let's get into it ✨

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✨ NAME ✨

BLAS/SRC/ddot.f — the file, the legend, the main character 🌟

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🌸 SYNOPSIS 🌸

Functions/Subroutines

double precision function ddot (n, dx, incx, dy, incy)

That's DDOT, bestie. double precision, no cap. 💖

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🦋 Function/Subroutine Documentation 🦋

double precision function ddot (integer n, double precision, dimension(*) dx, integer incx, double precision, dimension(*) dy, integer incy)

DDOT. periodt. 👑

🎀 Purpose 🎀

!> !> DDOT forms the dot product of two vectors. !> uses unrolled loops for increments equal to one. !>

so it takes two vectors and gives you the dot product — and when the increments are equal to one, it uses unrolled loops, which is lowkey a flex. 💅

💜 Parameters 💜

• N — N is INTEGER, and it's the number of elements in your input vector(s). that's it, that's the whole vibe. 🍓

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

• DX — DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) ). yes the dimension expression is that whole thing, copy it exactly, don't @ me. 🙈

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

• INCX — INCX is INTEGER, the storage spacing between elements of DX. how far apart your x-flavoured besties sit in memory. 🌈

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

• DY — DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) ). same deal, y-flavoured this time. 💀

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

• INCY — INCY is INTEGER, the storage spacing between elements of DY. 🧚

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

👑 Author 👑

the absolute institutions behind this:

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

four icons, one function. we stan. 🫶

🔥 Further Details 🔥

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

history lesson fr fr — jack dongarra, linpack, dated 3/11/78, and then modified 12/3/93 when the array(1) declarations got changed to array(*). glow-up behavior. ✨

⭐ Definition ⭐

Definition at line 81 of file ddot.f. noted. locked in. 📌

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💖 Author 💖

Generated automatically by Doxygen for LAPACK from the source code.

it wasn't even hand-written, Doxygen did that. automated queen. 🤖💅

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and that's the whole page bestie!! source & version check: this is LAPACK, Version 3.12.0, page BLAS/SRC/ddot.f(3) — catch you on the next manpage, mwah 🎀💜🦋