[MFMA] Implement MFMA 4x64 v3 #550
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This PR: - adds an `matrix_instr_nonkdim` options to force MFMA 64x4 and 4x64 layout: 464 corresponds 4(M)x64(N), 644 corresponds 64(M)x4(N) - adds tests for this option - fixes swizzling patter in some cases MFMA size heuristic now looks like this: 1. If kernel specific option is set, pick it 2. If the result tile shape is larger than 32x32, pick mfma32 3. If the tile shape is smaller than 32x32 but larger than 16x16, pick mfma16 4. if the tile shape is smaller than 4x64 or 64x4, pick mfma4x4 5. Otherwise, pick mfma4x64 or mfma64x4, depending on what tile fits into matrices
Extend K dimension of mfma4x64 and mfma64x4 dot operand layout from 4 to 64.
tuning command: `python3 tune_gemm.py --compare -m 16 -n 64 -k 64 -dtype_a "fp16" -dtype_b "fp16" -dtype_c "fp32" --num_threads=16 --keep`
This implements version 3 mfma 4x64 layout with swizzled operands
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This implements version 3 mfma 4x64 layout with swizzled operands