/home/abui...SRC/sdot.f(3)

💅 SDOT — the dot product bestie ✨

ok so real talk, this page is from the LAPACK BLAS library, and the file it lives in is literally:

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

like yes that's the whole path, no I'm not shortening it, it's giving "my build directory has lore" 🎀

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✨ SYNOPSIS ✨

Functions/Subroutines

real function SDOT (n, sx, incx, sy, incy)

SDOT — that's the whole vibe, she's the function, she's the moment 👑

Function/Subroutine Documentation

here's the full signature so you can see exactly what's going on:

real function SDOT (integer n, real, dimension(*) sx, integer incx, real,
    dimension(*) sy, integer incy)

SDOT. that's her name. don't wear it out 🫶

Purpose:

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

so basically bestie takes two vectors and gives you the dot product, periodt. and when the increments are equal to one — 1, the iconic default-ish scenario — she's out here using unrolled loops because she's efficient like that 🔥

Parameters

• N — N is INTEGER — number of elements in input vector(s). like how many things we're multiplying together, ngl that matters a lot.
• SX — SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) — this is the first vector, and yes the dimension formula is exactly that, write it down, don't guess 💖
• INCX — INCX is INTEGER — storage spacing between elements of SX. basically how far apart the elements are chillin' in memory.
• SY — SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) ) — second vector, same energy, note that it's INCY in the formula not INCX, don't mix them up bestie 💀
• INCY — INCY is INTEGER — storage spacing between elements of SY. matching energy to INCX but for the other vector 🦋

Author

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

the whole squad showed up for this one 😭👑

Further Details:

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

so yeah, jack dongarra, linpack, 3/11/78. — that's the original author credit and date, respect the elders 🙏 — and then modified 12/3/93, array(1) declarations changed to array(*) which is exactly the glow-up that happened on that date. iconic historical record, we keep it 🎀

Definition at line 81 of file sdot.f.

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😌 one last thing

this whole page? Generated automatically by Doxygen for LAPACK from the source code. so nobody hand-wrote this, the tooling did, and honestly it ate 🌸

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✨ LAPACK, Version 3.12.0, from /home/abui...SRC/sdot.f(3) — that's the version and the date stamp at the bottom, and that's the whole page bestie, love you, bye 💜🎀✨