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NF4 #1432

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Merged
merged 1 commit into from
Dec 2, 2024
Merged

NF4 #1432

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3 changes: 2 additions & 1 deletion bitsandbytes/autograd/_functions.py
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Expand Up @@ -579,7 +579,8 @@ def matmul_4bit(
assert quant_state is not None
if A.device.type in ("cpu", "xpu") and A.requires_grad == False:
if getattr(quant_state, "ipex", False):
out = F.gemv_4bit(A, B.t(), out, state=quant_state)
B = B.t() if len(B.shape) == 2 else B
out = F.gemv_4bit(A, B, out, state=quant_state)
if bias is not None:
out += bias
return out
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3 changes: 2 additions & 1 deletion bitsandbytes/nn/modules.py
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Expand Up @@ -508,7 +508,8 @@ def forward(self, x: torch.Tensor):
x = x.to(self.compute_dtype)

bias = None if self.bias is None else self.bias.to(self.compute_dtype)
out = bnb.matmul_4bit(x, self.weight.t(), bias=bias, quant_state=self.weight.quant_state)
weight = self.weight.t() if len(self.weight.shape) == 2 else self.weight
out = bnb.matmul_4bit(x, weight, bias=bias, quant_state=self.weight.quant_state)

out = out.to(inp_dtype)

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