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Fix large shift in uint128_fallback

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Victor Zverovich
2022-07-10 08:14:18 -07:00
parent e1d3d3a326
commit 2a1b3ac629
2 changed files with 5 additions and 1 deletions
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include/fmt/format.h
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@@ -366,10 +366,12 @@ class uint128_fallback {
}
FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
if (shift == 64) return {0, hi_};
if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
}
FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
if (shift == 64) return {lo_, 0};
if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
}
FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {