[libc-commits] [PATCH] D112580: [libc] add fast path to string to float conversion

Michael Jones via Phabricator via libc-commits libc-commits at lists.llvm.org
Tue Oct 26 16:46:04 PDT 2021

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Add the fast path first described by Clinger [1] with additions by Gay [2].
This speeds up conversion by about 10% by handling numbers with fewer digits
more efficiently.

[1] Clinger WD. How to Read Floating Point Numbers Accurately.
SIGPLAN Not 1990 Jun;25(6):92–101. https://doi.org/10.1145/93548.93557.
[2] Gay DM, Correctly rounded binary-decimal and decimal-binary conversions;

1990. AT&T Bell Laboratories Numerical Analysis Manuscript 90-10.

  rG LLVM Github Monorepo



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