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Implement 128-bit constant mul in bigint

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This commit is contained in:
Victor Zverovich
2022-04-03 07:12:24 -07:00
parent 02eb215f2f
commit 686de58886
3 changed files with 15 additions and 10 deletions
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8
include/fmt/format.h
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@@ -362,9 +362,11 @@ class uint128_fallback {
result += rhs;
return result;
}
friend auto operator*(const uint128_fallback&, uint32_t) -> uint128_fallback {
FMT_ASSERT(false, "");
return {};
friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
-> uint128_fallback {
FMT_ASSERT(lhs.hi_ == 0, "");
uint64_t hi = (lhs.lo_ >> 32) * rhs;
return {hi >> 32, (hi << 32) + (lhs.lo_ & ~uint32_t()) * rhs};
}
friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
-> uint128_fallback {