SSCAL(3)

🦋 SSCAL — bestie, we're scaling vectors today 💅

okay so real talk, this page lives at /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/BLAS/SRC/sscal.f and it's from the Library Functions Manual, section 3 (iykyk, that's the library-calls girlies). it's giving "small file, big main character energy" ✨

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🌸 SYNOPSIS 🌸

✨ Functions/Subroutines ✨

• subroutine SSCAL (n, sa, sx, incx) — literally just SSCAL, that's her name, no notes 🎀

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💖 Function/Subroutine Documentation 💖

🫶 subroutine SSCAL (integer n, real sa, real, dimension(*) sx, integer incx)

SSCAL — the name. the legend. the moment. ⭐

👑 Purpose:

!>
!>    SSCAL scales a vector by a constant.
!>    uses unrolled loops for increment equal to 1.
!>

so basically: take a vector, multiply the whole thing by one constant. slay. and when INCX is exactly 1 she busts out the unrolled loops because she's efficient like that 🔥

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🌈 Parameters

• N — !> N is INTEGER !> number of elements in input vector(s) — the headcount bestie, how many elements are we even working with 🧚
• SA — !> SA is REAL !> On entry, SA specifies the scalar alpha. — the constant itself, the scalar alpha if you're fancy. she's REAL. she's the multiplier. periodt 💅
• SX — !> SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) — the actual array, and yes the dimension expression is exactly that, don't come for her 💀
• INCX — !> INCX is INTEGER !> storage spacing between elements of SX — the stride, aka how far apart the elements are chilling in memory 🦋

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💜 Author

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

the whole squad, no cap 🫶

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🔍 Further Details:

!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>

the lore: jack dongarra, linpack, 3/11/78 — ancient history icon 👑. then modified 3/93 to just return if incx .le. 0. (so if INCX is less than or equal to zero, she's out, she's not doing it, bye 🙈). and modified 12/3/93 when the array(1) declarations got changed to array(*) — glow-up era ✨

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no wait, one more important detail: Definition at line 78 of file sscal.f. 📍 so if you're scrolling, line 78, that's where she's defined. iykyk.

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�� Author (yes, again, she's thorough)

Generated automatically by Doxygen for LAPACK from the source code. not me being auto-generated by a doc tool and still serving looks 💀🎀

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aaaand that's the page bestie! 🌸 this was LAPACK, Version 3.12.0 — the manual footer also drops the source path /home/abui...SRC/sscal.f(3), so yeah, that's the whole vibe. go scale something. ily. 💖🎀🦋