Optimize for x86_32 using intrinsics

jk-jeon / dragonbox

Reference implementation of Dragonbox in C++

Apache License 2.0

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Closed yumeyao closed 3 years ago

yumeyao commented 3 years ago

Note that gcc/clang could also implement 64-bit counting trailing zero using the similar way here, but it is not included in this PR.

jk-jeon commented 3 years ago

I made some stylistic changes but otherwise looks good. Thank you so much!