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Add rotr

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This commit is contained in:
Junekey Jeon 2022-02-08 18:27:53 -08:00 committed by Victor Zverovich
parent f1bd6f7731
commit 7b4323e1e0
1 changed files with 10 additions and 0 deletions
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10
include/fmt/format-inl.h
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@ -816,6 +816,16 @@ struct uint128_wrapper {
} }
}; };
// Compilers should be able to optimize this into the ror instruction.
inline std::uint32_t rotr(uint32_t n, uint32_t r) noexcept {
r &= 31;
return (n >> r) | (n << (32 - r));
}
inline std::uint64_t rotr(uint64_t n, uint32_t r) noexcept {
r &= 63;
return (n >> r) | (n << (64 - r));
}
// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox. // Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
namespace dragonbox { namespace dragonbox {
// Computes 128-bit result of multiplication of two 64-bit unsigned integers. // Computes 128-bit result of multiplication of two 64-bit unsigned integers.