metal : add NVFP4 quantization support#20456
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| #define N_R0_NVFP4 2 | ||
| #define N_SG_NVFP4 2 |
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Want to double check this on my Mac Studio to confirm no register spill (#20399)
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Co-authored-by: YiChen Lv <63285796+forforever73@users.noreply.github.com>
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Basic Metal GPU support for NVFP4 (E2M1 + UE4M3 scales) quantization type with optimized mul_mv/mul_mm/get_rows kernels and precomputed scale LUTs, achieving ~11x prompt and ~25x generation speedup over CPU on Apple Silicon.