This interview was recorded for the GOTO Book Club.
http://gotopia.tech/bookclub

Check out more here:
https://gotopia.tech/episodes/411

Daniel Kusswurm - SW Developer, Computer Scientist & Author of "Modern X86 Assembly Language Programming" & many more books
Matt Godbolt - Low-level Latency Geek & Creator of Compiler Explorer

RESOURCES
Matt
https://bsky.app/profile/matt.godbolt.org
https://xania.org
https://github.com/mattgodbolt
https://www.linkedin.com/in/godbolt
https://twitter.com/mattgodbolt
https://godbolt.org

Links
https://link.springer.com
https://youtu.be/L2Qu9rk05rE
https://youtu.be/-HNpim5x-IE
https://youtu.be/hgcNM-6wr34

DESCRIPTION
Matt Godbolt, creator of Compiler Explorer, interviews Daniel Kusswurm, author of "Modern X86 Assembly Language Programming", about the enduring relevance of assembly language in modern software development. They explore what SIMD (Single Instruction, Multiple Data) is and why it enables dramatic performance improvements for specific computational tasks, discuss when assembly language programming is justified versus using compiler intrinsics, and examine the challenges of writing vectorized algorithms. Dan shares insights from his career optimizing image analysis software and explains how understanding low-level architecture can improve code quality even when writing in higher-level languages.

RECOMMENDED BOOKS
Daniel Kusswurm • Modern X86 Assembly Language Programming v3 • https://amzn.to/44hIVZf
Daniel Kusswurm • Modern X86 Assembly Language Programming v2 • https://amzn.to/3LJlMIZ
Daniel Kusswurm • Modern X86 Assembly Language Programming v1 • https://amzn.to/43DPANj
Daniel Kusswurm • Modern Arm Assembly Language Programming • https://amzn.to/4rbyH6M
Daniel Kusswurm • Practical C++ STL Programming • https://amzn.to/4ickAdq
Daniel Kusswurm • Modern Parallel Programming with C++ and Assembly Language • https://amzn.to/4o5J3SF


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Matt Godbolt interviews Dan Kusswurm about modern x86 assembly language programming, focusing on SIMD (Single Instruction Multiple Data) extensions like AVX and AVX-512. They discuss when assembly language is justified (real-time image processing, multimedia, high-frequency trading), how SIMD works by processing multiple data elements simultaneously, and the challenges of writing SIMD algorithms including conditional logic and masking. Kusswurm explains the trade-offs between hand-written assembly, compiler intrinsics, and compiler-generated code, emphasizing that assembly is worthwhile when performance gains are substantial (2-3x) and computational bottlenecks exist. The conversation covers calling conventions, benchmarking challenges, and how understanding assembly improves higher-level programming through better awareness of cache alignment and memory layout.

Modern X86 Assembly Language Programming • Daniel Kusswurm & Matt Godbolt