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Fix truncated FP4 constant in Triton dequantize_fp4_tree #2026

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Merged
matthewdouglas merged 3 commits into from
Jul 29, 2026
+1 −1
Merged

Fix truncated FP4 constant in Triton dequantize_fp4_tree #2026

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3d65ff8
Fix truncated FP4 constant in Triton dequantize_fp4_tree
Anai-Guo Jul 29, 2026
9647805
style: add missing newline at end of kernels_4bit.py (ruff W292)
Anai-Guo Jul 29, 2026
1c9d959
style: add missing newline at end of kernels_4bit.py (ruff W292)
Anai-Guo Jul 29, 2026
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2 changes: 1 addition & 1 deletion bitsandbytes/backends/triton/kernels_4bit.py
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Original file line number Diff line number Diff line change
Expand Up @@ -219,7 +219,7 @@ def dequantize_fp4_tree(val, absmax):
branch2 = tl.where(
second_bit,
tl.where(first_bit, 1.0, 0.66666667), # 1011, 1010
tl.where(first_bit, 0.00520833, 0.0), # 1001, 1000
tl.where(first_bit, 0.005208333333, 0.0), # 1001, 1000
)
out = tl.where(third_bit, branch1, branch2)
return out * sign * absmax
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