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-rw-r--r--lib/Support/APFloat.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index b32dfeb956..5307829ed8 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -3455,7 +3455,7 @@ void APFloat::toString(SmallVectorImpl<char> &Str,
// <= semantics->precision + e * 137 / 59
// (log_2(5) ~ 2.321928 < 2.322034 ~ 137/59)
- unsigned precision = semantics->precision + 137 * texp / 59;
+ unsigned precision = semantics->precision + (137 * texp + 136) / 59;
// Multiply significand by 5^e.
// N * 5^0101 == N * 5^(1*1) * 5^(0*2) * 5^(1*4) * 5^(0*8)