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Fix stride handling for optional dt_bias and D #796

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Fix stride handling for optional dt_bias and D #796

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4 changes: 2 additions & 2 deletions mamba_ssm/ops/triton/selective_state_update.py
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Original file line number Diff line number Diff line change
Expand Up @@ -199,11 +199,11 @@ def selective_state_update(state, x, dt, A, B, C, D=None, z=None, dt_bias=None,
state.stride(0), state.stride(1), state.stride(2), state.stride(3),
x.stride(0), x.stride(1), x.stride(2),
dt.stride(0), dt.stride(1), dt.stride(2),
*(dt_bias.stride(0), dt_bias.stride(1)) if dt_bias is not None else 0,
*( (dt_bias.stride(0), dt_bias.stride(1)) if dt_bias is not None else (0, 0) ),
A.stride(0), A.stride(1), A.stride(2),
B.stride(0), B.stride(1), B.stride(2),
C.stride(0), C.stride(1), C.stride(2),
*(D.stride(0), D.stride(1)) if D is not None else 0,
*( (D.stride(0), D.stride(1)) if D is not None else (0, 0) ),
z_strides[0], z_strides[1], z_strides[2],
out.stride(0), out.stride(1), out.stride(2),
dt_softplus,
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