SSYMM(3)

🌸 SSYMM(3) — Library Functions Manual 🌸

okay bestie, buckle up 💅 this is the manual page for SSYMM, and it’s lowkey iconic. It’s from the Library Functions Manual and lives in the LAPACK source tree. No cap, we’re keeping every single detail.

🌟 NAME 🌟

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

✨ SYNOPSIS ✨

   Functions/Subroutines
       subroutine SSYMM (side, uplo, m, n, alpha, a, lda, b, ldb, beta, c, ldc)
           SSYMM

💖 Function/Subroutine Documentation 💖

   subroutine SSYMM (character side, character uplo, integer m, integer n, real
       alpha, real, dimension(lda,*) a, integer lda, real, dimension(ldb,*) b,
       integer ldb, real beta, real, dimension(ldc,*) c, integer ldc)
       SSYMM

🎯 Purpose

This one is giving matrix-matrix energy. SSYMM performs one of the matrix-matrix operations:

   C := alpha*A*B + beta*C,

or

   C := alpha*B*A + beta*C,

where alpha and beta are scalars, A is a symmetric matrix and B and C are m by n matrices. Periodt. 💫

🌈 Parameters

• SIDE — SIDE is CHARACTER*1. On entry, SIDE specifies whether the symmetric matrix A appears on the left or right in the operation as follows:
  • SIDE = 'L' or 'l' C := alpha*A*B + beta*C,
  • SIDE = 'R' or 'r' C := alpha*B*A + beta*C,
• UPLO — UPLO is CHARACTER*1. On entry, UPLO specifies whether the upper or lower triangular part of the symmetric matrix A is to be referenced as follows:
  • UPLO = 'U' or 'u' Only the upper triangular part of the symmetric matrix is to be referenced.
  • UPLO = 'L' or 'l' Only the lower triangular part of the symmetric matrix is to be referenced.
• M — M is INTEGER. On entry, M specifies the number of rows of the matrix C. M must be at least zero.
• N — N is INTEGER. On entry, N specifies the number of columns of the matrix C. N must be at least zero.
• ALPHA — ALPHA is REAL. On entry, ALPHA specifies the scalar alpha.
• A — A is REAL array, dimension ( LDA, ka ), where ka is m when SIDE = 'L' or 'l' and is n otherwise. Before entry with SIDE = 'L' or 'l', the m by m part of the array A must contain the symmetric matrix, such that when UPLO = 'U' or 'u', the leading m by m upper triangular part of the array A must contain the upper triangular part of the symmetric matrix and the strictly lower triangular part of A is not referenced, and when UPLO = 'L' or 'l', the leading m by m lower triangular part of the array A must contain the lower triangular part of the symmetric matrix and the strictly upper triangular part of A is not referenced. Before entry with SIDE = 'R' or 'r', the n by n part of the array A must contain the symmetric matrix, such that when UPLO = 'U' or 'u', the leading n by n upper triangular part of the array A must contain the upper triangular part of the symmetric matrix and the strictly lower triangular part of A is not referenced, and when UPLO = 'L' or 'l', the leading n by n lower triangular part of the array A must contain the lower triangular part of the symmetric matrix and the strictly upper triangular part of A is not referenced. 💀
• LDA — LDA is INTEGER. On entry, LDA specifies the first dimension of A as declared in the calling (sub) program. When SIDE = 'L' or 'l' then LDA must be at least max( 1, m ), otherwise LDA must be at least max( 1, n ).
• B — B is REAL array, dimension ( LDB, N ). Before entry, the leading m by n part of the array B must contain the matrix B.
• LDB — LDB is INTEGER. On entry, LDB specifies the first dimension of B as declared in the calling (sub) program. LDB must be at least max( 1, m ).
• BETA — BETA is REAL. On entry, BETA specifies the scalar beta. When BETA is supplied as zero then C need not be set on input.
• C — C is REAL array, dimension ( LDC, N ). Before entry, the leading m by n part of the array C must contain the matrix C, except when beta is zero, in which case C need not be set on entry. On exit, the array C is overwritten by the m by n updated matrix.
• LDC — LDC is INTEGER. On entry, LDC specifies the first dimension of C as declared in the calling (sub) program. LDC must be at least max( 1, m ).

💌 Author

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

🔥 Further Details

Level 3 Blas routine.

-- Written on 8-February-1989.
   Jack Dongarra, Argonne National Laboratory.
   Iain Duff, AERE Harwell.
   Jeremy Du Croz, Numerical Algorithms Group Ltd.
   Sven Hammarling, Numerical Algorithms Group Ltd.

Definition at line 188 of file ssymm.f.

🫶 Author 🫶

Generated automatically by Doxygen for LAPACK from the source code.

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okay that’s the whole tea ☕️💖 LAPACK Version 3.12.0, source /home/abui...SRC/ssymm.f(3), date 8-February-1989 — mwah, bestie! 🫶✨