The Futhark compiler blog post discusses a subtle bug in signed integer division where the most negative number divided by -1 cannot be represented correctly in two's complement arithmetic. The fix introduces a performance trade-off, making all divisions slightly slower to handle this extremely rare edge case across all backend code generation.
Background
Futhark is a high-performance purely functional data-parallel array programming language with a compiler backend that generates C code. This post targets language implementers dealing with low-level arithmetic edge cases.
- Source
- Lobsters
- Published
- Oct 20, 2026 at 12:42 AM
- Score
- 6.0 / 10