Christophe de Dinechin is a French computer scientist, with contributions in video games, programming languages and operating systems.

Dinechin contributed to C++, notably a high-performance exception handling implementation that became a de facto standard in the industry. de Dinechin was one of the proponents of a portable C++ ABI, initially developed for Itanium, but now widely used across platforms.

Dinechin is the designer of the XL programming language and associated concept programming methodology. "XL" is named for "eXtensible Language".

XL features programmer-reconfigurable syntax and semantics. Compiler plug-ins can be used to add new features to the language. A base set of plug-ins implements a relatively standard imperative language. Programmers can write their own plug-ins to implement application-specific notations, such as symbolic differentiation, which can then be used as readily as built-in language features.

There are projects that exploit similar ideas to create code with higher level of abstraction. Among them are:

As initial developer of Alpha Waves, a "groundbreaking" Atari ST game (listed in the Guinness World Records as the first 3D platform game), de Dinechin heavily influenced Frederick Raynal, the main developer of Alone in the Dark. de Dinechin also wrote a few viral games for HP-48 calculators, and was the first person to take advantage of hardware-scrolling on these machines.

In the early 2000s, he worked as a software architect for HP-UX, and was the initial designer of HP's virtualisation platform for Itanium servers, HP Integrity Virtual Machines. He was awarded 10 US patents for this work.

Since 2022, he also is the initiator and maintainer of DB48X, a new implementation of RPL.