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Computer Science > Programming Languages

arXiv:2408.17208 (cs)
[Submitted on 30 Aug 2024 (v1), last revised 2 Sep 2024 (this version, v2)]

Title:Extending the C/C++ Memory Model with Inline Assembly

Authors:Paulo Emílio de Vilhena, Ori Lahav, Viktor Vafeiadis, Azalea Raad
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Abstract:Programs written in C/C++ often include inline assembly: a snippet of architecture-specific assembly code used to access low-level functionalities that are impossible or expensive to simulate in the source language. Although inline assembly is widely used, its semantics has not yet been formally studied.
In this paper, we overcome this deficiency by investigating the effect of inline assembly on the consistency semantics of C/C++ programs. We propose the first memory model of the C++ Programming Language with support for inline assembly for Intel's x86 including non-temporal stores and store fences. We argue that previous provably correct compiler optimizations and correct compiler mappings should remain correct under such an extended model and we prove that this requirement is met by our proposed model.
Subjects: Programming Languages (cs.PL)
ACM classes: F.3.2
Cite as: arXiv:2408.17208 [cs.PL]
  (or arXiv:2408.17208v2 [cs.PL] for this version)
  https://doi.org/10.48550/arXiv.2408.17208
Related DOI: https://doi.org/10.1145/3689749

Submission history

From: Paulo Emílio De Vilhena [view email]
[v1] Fri, 30 Aug 2024 11:27:33 UTC (2,228 KB)
[v2] Mon, 2 Sep 2024 09:35:11 UTC (2,228 KB)
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