Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/15394#discussion_r82647560
--- Diff: mllib-local/src/main/scala/org/apache/spark/ml/linalg/BLAS.scala
---
@@ -244,6 +244,15 @@ private[spark] object BLAS extends Serializable {
}
/**
+ * y += alpha * A * x
+ *
+ * @param A The upper triangular part of A in a [[DenseVector]] (column
major)
+ */
+ def dspmv(n: Int, alpha: Double, A: DenseVector, x: DenseVector, y:
DenseVector): Unit = {
--- End diff --
I exposed it in this simplified form for now since it's all I needed. I
think it's ok to leave it and add the other functionality when we need it in
the future. But I can change it if you think it's best.
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