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AK+LibCrypto: Delete 64x64 wide multiplication workarounds

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Now UFixedBigInt exposes API to do wide multiplications of this kind
efficiently.
This commit is contained in:
Dan Klishch 2023-02-04 19:03:52 +03:00 • committed by Andrew Kaster
parent 67ec347bfa
commit 8f8e31e780
3 changed files with 4 additions and 26 deletions
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13
AK/StringFloatingPointConversions.cpp
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@ -171,25 +171,14 @@ FloatingPointExponentialForm inner_convert_floating_point_to_decimal_exponential
static u128 multiply(u64 a, u64 b)
{
#ifdef __SIZEOF_INT128__
unsigned __int128 result = (unsigned __int128)a * b;
u64 low = result;
u64 high = result >> 64;
return u128 { low, high };
#else
return u128 { a }.wide_multiply(u128 { b }).low;
#endif
return UFixedBigInt<64>(a).wide_multiply(b);
}
template<>
FloatingPointExponentialForm convert_floating_point_to_decimal_exponential_form<float>(float value)
{
auto multiply_and_shift = [](u64 operand, u64 multiplier, i32 shift) {
#ifdef __SIZEOF_INT128__
auto result = (unsigned __int128)operand * multiplier;
#else
auto result = multiply(operand, multiplier);
#endif
if (shift < 0)
return static_cast<u64>(result << static_cast<u32>(-shift));
else