Niketan Pansare created SYSTEMML-1039:

             Summary: Add support for aggregate unary operations on GPU
                 Key: SYSTEMML-1039
             Project: SystemML
          Issue Type: Sub-task
         Environment: 1. Update UnaryOp to enable GPU for these instructions.
2. Add AggregateUnaryGPUInstruction and invoke kernels corresponding to

Note nrow, ncol and length should always be a CP instruction. Also, we can 
break this into subtasks for sparse if necessary.

The opcodes related to this tasks are: uak+, uark+, uack+, uasqk+, uarsqk+, 
uacsqk+, uamean, uarmean, uacmean, uavar, uarvar, uacvar, uamax, uarmax, 
uarimax, uacmax, uamin, uarmin, uarimin, uacmin, ua+, uar+, uac+, ua*, uatrace, 
uaktrace and the operations of these are (with/without kahan) sum, trace, 
rowsum, colsum, sum of squares, row sum of squares, col sum of squares, cumsum, 
cumprod, cummin, cummax, min, max, min_index, max_index, mean, variance and 

[~nakul02] This is a mega-task. Hopefully we can generalize our kernel 
implementation to make this easier.
            Reporter: Niketan Pansare

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