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| SSYMM/DSYMM/CHEMM/CSYMM/ZHEMM/ZSYMM | |
Input | side | Specifies whether symmetric or Hermitian matrix A is | |
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| the left or right matrix operand: | |
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| ’L’ or ’l’ | A is the left matrix operand, that is, |
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| compute C ← αAB + βC |
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| ’R’ or ’r’ | A is the right matrix operand, that is, |
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| compute C ← αBA + βC |
| uplo | Upper/lower triangular storage option for A: | |
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| ’L’ or ’l’ | Reference only the lower triangle of A |
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| ’U’ or ’u’ | Reference only the upper triangle of A |
| m | Number of rows in matrix C, m ≥ 0. If m = 0, the | |
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| subprograms do not reference a, b, or c. | |
| n | Number of columns in matrix B, n ≥ 0. If n = 0, the | |
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| subprograms do not reference a, b, or c. | |
| alpha | The scalar α. If alpha = 0, the subprograms compute | |
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| C ← βC without referencing a or b. | |
| a | Array whose upper or lower triangle, as specified by | |
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| uplo, contains the upper or lower triangle of the matrix | |
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| A. The other triangle of a is not referenced. The size of | |
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| A is indicated by side: | |
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| ’L’ or ’l’ | A is |
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| ’R’ or ’r’ | A is |
| lda | The leading dimension of array a as declared in the | |
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| calling program unit, with lda ≥ max (the number of | |
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| rows of A,1). |
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| b | Array containing the | |
| ldb | The leading dimension of array b as declared in the | |
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| calling program unit, with ldb ≥ max(m,1). | |
| beta | The scalar β. |
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| c | Array containing the | |
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| input if beta = 0. | |
| ldc | The leading dimension of array c as declared in the | |
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| calling program unit, with ldc ≥ max(m,1). | |
Output | c | The updated C matrix replaces the input. |
Notes These subprograms conform to specifications of the Level 3 BLAS.
Chapter 3 Basic Matrix Operations 267