BLAS/SRC/sdsdot.f(3)

📦
version 3.12.1 · 4 versions
, in arch rolling

💖 NAME 💖

BLAS/SRC/sdsdot.f — that's the page name, bestie. It lives in the Library Functions Manual (manual name folded in near the top, periodt), and this page is BLAS/SRC/sdsdot.f(3). It's all about sdsdot. No cap. 💅

✨ SYNOPSIS ✨

Functions/Subroutines

  • real function sdsdot (n, sb, sx, incx, sy, incy) — SDSDOT

🛠️ Function/Subroutine Documentation 🛠️

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

SDSDOT — iconic. 👑

💖 Purpose 💖

Okay so the whole assignment is literally to compute the inner product of two vectors with extended precision accumulation. It's giving math main character energy. ✨

Returns S.P. result with dot product accumulated in D.P. — highkey important, fr fr.

SDSDOT = SB + sum for I = 0 to N-1 of SX(LX+I*INCX)*SY(LY+I*INCY),
where LX = 1 if INCX .GE. 0, else LX = 1+(1-N)*INCX, and LY is
defined in a similar way using INCY.

🌈 Parameters 🌈

  • N — N is INTEGER; number of elements in input vector(s).
  • SB — SB is REAL; single precision scalar to be added to inner product.
  • SX — SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) ); single precision vector with N elements.
  • INCX — INCX is INTEGER; storage spacing between elements of SX.
  • SY — SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) ); single precision vector with N elements. Yes, the dimension is written with abs( INCX ) in the original, bestie — not a typo from me. 🙈
  • INCY — INCY is INTEGER; storage spacing between elements of SY.

👑 Author 👑

The human legends on this one:

  • Lawson, C. L., (JPL)
  • Hanson, R. J., (SNLA)
  • Kincaid, D. R., (U. of Texas)
  • Krogh, F. T., (JPL)

Also repping:

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

🔥 Further Details 🔥

📚 REFERENCES 📚

C. L. Lawson, R. J. Hanson, D. R. Kincaid and F. T. Krogh, Basic linear algebra subprograms for Fortran usage, Algorithm No. 539, Transactions on Mathematical Software 5, 3 (September 1979), pp. 308-323.

🕰️ REVISION HISTORY (YYMMDD) 🕰️

  • 791001 — DATE WRITTEN
  • 890531 — Changed all specific intrinsics to generic. (WRB)
  • 890831 — Modified array declarations. (WRB)
  • 890831 — REVISION DATE from Version 3.2
  • 891214 — Prologue converted to Version 4.0 format. (BAB)
  • 920310 — Corrected definition of LX in DESCRIPTION. (WRB)
  • 920501 — Reformatted the REFERENCES section. (WRB)
  • 070118 — Reformat to LAPACK coding style

Definition at line 112 of file sdsdot.f. 💖

🤖 Author 🤖

Generated automatically by Doxygen for LAPACK from the source code.

source/version: LAPACK Version 3.12.0 · page BLAS/SRC/sdsdot.f(3) · date: not listed in the footer, so I'm not inventing one, ngl 💅✨

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