Transcoding unicode characters with AVX‐512 instructions
Intel includes in its recent processors a powerful set of instructions capable of processing 512‐bit registers with a single instruction (AVX‐512). Some of these instructions have no equivalent in earlier instruction sets. We leverage these instructions to efficiently transcode strings between the m...
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| Published in: | Software, practice & experience Vol. 53; no. 12; pp. 2430 - 2462 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Bognor Regis
Wiley Subscription Services, Inc
01.12.2023
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| Subjects: | |
| ISSN: | 0038-0644, 1097-024X |
| Online Access: | Get full text |
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| Summary: | Intel includes in its recent processors a powerful set of instructions capable of processing 512‐bit registers with a single instruction (AVX‐512). Some of these instructions have no equivalent in earlier instruction sets. We leverage these instructions to efficiently transcode strings between the most common formats: UTF‐8 and UTF‐16. With our novel algorithms, we are often twice as fast as the previous best solutions. For example, we transcode Chinese text from UTF‐8 to UTF‐16 at more than 5 GiB using fewer than 2 CPU instructions per character. To ensure reproducibility, we make our software freely available as an open‐source library. Our library is part of the popular Node.js JavaScript runtime. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
| ISSN: | 0038-0644 1097-024X |
| DOI: | 10.1002/spe.3261 |