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Remove unneeded fallback path

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This commit is contained in:
Matt Borland
2023-06-23 14:25:22 +02:00
parent 8420f2aed0
commit ccedcd6ef5
1 changed files with 5 additions and 1 deletions
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6
include/boost/charconv/detail/compute_float80.hpp
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@@ -165,7 +165,7 @@ inline ResultType compute_float80(std::int64_t q, Unsigned_Integer w, bool negat
{
const uint128 factor_significand_low = significand_256_low[q - smallest_power];
product = umul256(w, factor_significand_low);
const uint128 product_low = product.low;
//const uint128 product_low = product.low;
const uint128 product_middle2 = product.high;
const uint128 product_middle1 = low;
uint128 product_high = high;
@@ -176,6 +176,9 @@ inline ResultType compute_float80(std::int64_t q, Unsigned_Integer w, bool negat
++product_high;
}
// https://arxiv.org/pdf/2212.06644.pdf
// Unneeded fallback checks
/*
// We want to check whether mantissa *it + i would affect the result
if (((product_middle + 1 == 0) && ((product_high & UINT64_C(0x1FF)) == UINT64_C(0x1FF)) &&
(product_low + w < product_low)))
@@ -183,6 +186,7 @@ inline ResultType compute_float80(std::int64_t q, Unsigned_Integer w, bool negat
success = std::errc::not_supported;
return 0;
}
*/
low = product_middle;
high = product_high;