May 2026

# Floor and Ceil Versus Denormals on CPU and GPU

Sat
23
May 2026

Recently, I dove deep into floating-point numbers and their behavior. Somehow, this topic haunts me in my programming practice since I created Floating-Point Formats Cheatsheet back in 2013 and also released a comprehensive article The Secrets of Floating-Point Numbers in 2024.

This time, I would like to focus on one specific question:

What is the result of floor(-1.175493930432748e-38) ?

Note: Hexadecimal value of our input number is 0x807FFFFD.

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