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Commit ff3c72db authored by Meihua Wu's avatar Meihua Wu Committed by Xiangrui Meng
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[SPARK-9175] [MLLIB] BLAS.gemm fails to update matrix C when alpha==0 and beta!=1 

Fix BLAS.gemm to update matrix C when alpha==0 and beta!=1
Also include unit tests to verify the fix.

mengxr brkyvz

Author: Meihua Wu <meihuawu@umich.edu>

Closes #7503 from rotationsymmetry/fix_BLAS_gemm and squashes the following commits:

fce199c [Meihua Wu] Fix BLAS.gemm to update C when alpha==0 and beta!=1
parent a5d05819
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