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167e081 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | import torch
from tile_kernels.utils import align, ceil_div
def clear_unused_sf(sf: torch.Tensor, hidden: int, num_per_channels: int) -> torch.Tensor:
"""Zero out unused sf entries beyond the actual channel block count.
Args:
sf: Scale-factor tensor to clean up.
hidden: Number of hidden channels in the original tensor.
num_per_channels: Number of channels per scaling block.
Returns:
Flattened sf tensor with unused trailing entries set to zero.
"""
num_channel_blocks = ceil_div(hidden, num_per_channels)
aligned_num_channel_blocks = align(num_channel_blocks, 4)
sf_flattened = (sf.contiguous().flatten().view(torch.uint8)).view(-1, aligned_num_channel_blocks)
sf_flattened[:, num_channel_blocks:] = 0
return sf_flattened
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