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Inside SFPU Overflow Bugs: How a 40-Year-Old Rounding Trick Breaks on Modern AI Accelerators

This story is from 2026-09-09. It is preserved in the archive; the latest stories are on the live feed.

Inside SFPU Overflow Bugs: How a 40-Year-Old Rounding Trick Breaks on Modern AI Accelerators The Bug ttnn.softplus(-1e7) returns +inf . Not approximately zero — infinity . On a chip that costs thousands of dollars. import torch , ttnn x = torch . tensor ([ - 1e7 , - 1e8 , - 1e10 ], dtype = torch .…

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  1. 2026-09-09 08:23 · DEV Community — Machine Learning
    Inside SFPU Overflow Bugs: How a 40-Year-Old Rounding Trick Breaks on Modern AI Accelerators

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