[Dev] Adjust computation logic to avoid precision loss when casting acc_s from float to float16 #141
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…cc_s from float to float16 - Remove redundant `acc_s_0` fragment in flash attention kernel - Simplify memory copy and reduction operations - Reorder memory copy and scaling steps for improved performance - Add Hopper-specific synchronization method in CUDA reduce template - Update reduce operation to use architecture-specific synchronization
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acc_s_0fragment in flash attention kernel