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Remove Boost <1.55 workaround for multiprecision::msb()

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This commit is contained in:
Alex Beregszaszi 2019-12-13 00:15:15 +00:00
parent df076e072d
commit 4a2a2eb635
1 changed files with 4 additions and 21 deletions
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25
libsolidity/ast/Types.cpp
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@ -52,23 +52,6 @@ using namespace dev::solidity;
namespace
{
unsigned int mostSignificantBit(bigint const& _number)
{
#if BOOST_VERSION < 105500
solAssert(_number > 0, "");
bigint number = _number;
unsigned int result = 0;
while (number != 0)
{
number >>= 1;
++result;
}
return --result;
#else
return boost::multiprecision::msb(_number);
#endif
}
/// Check whether (_base ** _exp) fits into 4096 bits.
bool fitsPrecisionExp(bigint const& _base, bigint const& _exp)
{
@ -79,7 +62,7 @@ bool fitsPrecisionExp(bigint const& _base, bigint const& _exp)
size_t const bitsMax = 4096;
unsigned mostSignificantBaseBit = mostSignificantBit(_base);
unsigned mostSignificantBaseBit = boost::multiprecision::msb(_base);
if (mostSignificantBaseBit == 0) // _base == 1
return true;
if (mostSignificantBaseBit > bitsMax) // _base >= 2 ^ 4096
@ -105,7 +88,7 @@ bool fitsPrecisionBaseX(
size_t const bitsMax = 4096;
unsigned mostSignificantMantissaBit = mostSignificantBit(_mantissa);
unsigned mostSignificantMantissaBit = boost::multiprecision::msb(_mantissa);
if (mostSignificantMantissaBit > bitsMax) // _mantissa >= 2 ^ 4096
return false;
@ -1100,7 +1083,7 @@ TypeResult RationalNumberType::binaryOperatorResult(Token _operator, Type const*
else
{
uint32_t exponent = other.m_value.numerator().convert_to<uint32_t>();
if (exponent > mostSignificantBit(boost::multiprecision::abs(m_value.numerator())))
if (exponent > boost::multiprecision::msb(boost::multiprecision::abs(m_value.numerator())))
value = m_value.numerator() < 0 ? -1 : 0;
else
{
@ -1124,7 +1107,7 @@ TypeResult RationalNumberType::binaryOperatorResult(Token _operator, Type const*
}
// verify that numerator and denominator fit into 4096 bit after every operation
if (value.numerator() != 0 && max(mostSignificantBit(abs(value.numerator())), mostSignificantBit(abs(value.denominator()))) > 4096)
if (value.numerator() != 0 && max(boost::multiprecision::msb(abs(value.numerator())), boost::multiprecision::msb(abs(value.denominator()))) > 4096)
return TypeResult::err("Precision of rational constants is limited to 4096 bits.");
return TypeResult{TypeProvider::rationalNumber(value)};