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This commit is contained in:
Victor Zverovich 2019-11-24 15:34:33 -08:00
parent 111fc127fe
commit 57cd3f72e9
1 changed files with 1 additions and 3 deletions
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4
include/fmt/format-inl.h
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@ -452,6 +452,7 @@ class fp {
inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; } inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; }
// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
inline uint64_t multiply(uint64_t lhs, uint64_t rhs) { inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
#if FMT_USE_INT128 #if FMT_USE_INT128
auto product = static_cast<__uint128_t>(lhs) * rhs; auto product = static_cast<__uint128_t>(lhs) * rhs;
@ -469,9 +470,6 @@ inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
#endif #endif
} }
// Computes an fp number r with r.f = x.f * y.f / pow(2, 64) rounded to nearest
// with half-up tie breaking, r.e = x.e + y.e + 64. Result may not be
// normalized.
inline fp operator*(fp x, fp y) { return {multiply(x.f, y.f), x.e + y.e + 64}; } inline fp operator*(fp x, fp y) { return {multiply(x.f, y.f), x.e + y.e + 64}; }
// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its // Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its