fix: use ReLU² instead of SiLU in BitNet FFN (fixes #588) - #604
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Pranesh Nikhar (praneshnikhar) wants to merge 1 commit into
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fix: use ReLU² instead of SiLU in BitNet FFN (fixes #588)#604Pranesh Nikhar (praneshnikhar) wants to merge 1 commit into
Pranesh Nikhar (praneshnikhar) wants to merge 1 commit into
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Fixes microsoft#588 — BitNet b1.58 architecture uses squared ReLU (relu²) in the FFN, but the graph builder was hardcoded to LLM_FFN_SILU. This caused ~6x perplexity regression on every backend. Submodule PR: https://github.com/praneshnikhar/llama.cpp/pull/1
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BitNet b1.58 architecture uses squared ReLU (relu²) in the FFN, but the graph builder was hardcoded to
LLM_FFN_SILU.This caused a ~6x perplexity regression on every backend:
The fix is a one-line change in the llama.cpp submodule:
LLM_FFN_SILU→LLM_FFN_RELU_SQR.LLM_FFN_RELU_SQRalready exists in the enum and is implemented in the graph builder.Depends on: isHuangXin/llama.cpp#3
Closes #588