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Fix #3458, correct min_val and max_val #3460

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Fix #3458, correct min_val and max_val #3460

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8 changes: 6 additions & 2 deletions torchao/quantization/quant_primitives.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1553,8 +1553,12 @@ def _choose_qparams_affine(
)
input = input.view(shape_for_reduction)

min_val = torch.amin(input, dim=reduction_dims, keepdim=keepdim)
max_val = torch.amax(input, dim=reduction_dims, keepdim=keepdim)
if reduction_dims:
min_val = torch.amin(input, dim=reduction_dims, keepdim=keepdim)
max_val = torch.amax(input, dim=reduction_dims, keepdim=keepdim)
else:
min_val = input
max_val = input

min_val_neg = torch.min(min_val, torch.zeros_like(min_val))
max_val_pos = torch.max(max_val, torch.zeros_like(max_val))
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