whisper.cpp

1bebb1a1 - vulkan: Optimize some mat-vec mul quant shaders (llama/10296)

vulkan: Optimize some mat-vec mul quant shaders (llama/10296) Compute two result elements per workgroup (for Q{4,5}_{0,1}). This reuses the B loads across the rows and also reuses some addressing calculations. This required manually partially unrolling the loop, since the compiler is less willing to unroll outer loops. Add bounds-checking on the last iteration of the loop. I think this was at least partly broken before. Optimize the Q4_K shader to vectorize most loads and reduce the number of bit twiddling instructions.