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Details: 1. For lower and upper, non-transpose variants of gemmt, new kernels are developed and optimized to compute only the required outputs in the diagonal blocks. 2. In the previous implementation, all the 48 outputs of the given 6x8 block of C matrix are computed and stored into a temporary buffer. Later,the required elements are copied into the final C output buffer. 3. Changes are made to compute only the required outputs of the 6x8 block of C matrix and directly stored in the final C output buffer. 4. With this optimization, we are avoiding copy operation and also reducing the number of computations. 5. Kernels specific to compute Lower and Upper Variant diagonal outputs have been added. 6. SUP Framework changes to integrate the new kernels have been added. 7. These kernels are part of the SUP framework. AMD-Internal: [CPUPL-2341] Change-Id: I0ec8f24a0fb19d9b1ef7254732b8e09f06e1486a