causal-conv1d 1.6.2.post1


pip install causal-conv1d

  Latest version

Released: May 09, 2026

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Author: Tri Dao
Requires Python: >=3.9

Classifiers

Programming Language
  • Python :: 3

License
  • OSI Approved :: BSD License

Operating System
  • Unix

Causal depthwise conv1d in CUDA with a PyTorch interface

Features:

  • Support fp32, fp16, bf16.
  • Kernel size 2, 3, 4.

How to use

from causal_conv1d import causal_conv1d_fn
def causal_conv1d_fn(x, weight, bias=None, activation=None):
    """
    x: (batch, dim, seqlen)
    weight: (dim, width)
    bias: (dim,)
    activation: either None or "silu" or "swish"

    out: (batch, dim, seqlen)
    """

Equivalent to:

import torch.nn.functional as F

F.conv1d(x, weight.unsqueeze(1), bias, padding=width - 1, groups=dim)[..., :seqlen]

Additional Prerequisites for AMD cards

Patching ROCm

If you are on ROCm 6.0, run the following steps to avoid errors during compilation. This is not required for ROCm 6.1 onwards.

  1. Locate your ROCm installation directory. This is typically found at /opt/rocm/, but may vary depending on your installation.

  2. Apply the Patch. Run with sudo in case you encounter permission issues.

     patch /opt/rocm/include/hip/amd_detail/amd_hip_bf16.h < rocm_patch/rocm6_0.patch 
    
Extras: None
Dependencies:
torch
packaging
ninja