80int64_t
rescale( int64_t aNumerator, int64_t aValue, int64_t aDenominator )
82#if defined( _M_X64 ) && ( _MSC_VER >= 1920 )
84 uint64_t productLo =
static_cast<uint64_t
>( _mul128( aNumerator, aValue, &productHi ) );
86 int64_t r = ( ( productHi < 0 ) ^ ( aDenominator < 0 ) ) ? -aDenominator / 2 : aDenominator / 2;
88 uint64_t rLo =
static_cast<uint64_t
>( r );
89 int64_t rHi = r < 0 ? -1ll : 0ll;
92 productHi += rHi + ( productLo < rLo );
97 int64_t
result = _div128( productHi, productLo, aDenominator, &remainder );
101 __except( ( GetExceptionCode() == EXCEPTION_INT_OVERFLOW ) ? EXCEPTION_EXECUTE_HANDLER
102 : EXCEPTION_CONTINUE_SEARCH )
104 kimathLogDebug(
"Overflow in rescale (%lld * %lld + %lld) / %lld", aNumerator, aValue, r,
110#elif defined( __SIZEOF_INT128__ )
111 __int128_t numerator = (__int128_t) aNumerator * (__int128_t) aValue;
113 if( ( numerator < 0 ) ^ ( aDenominator < 0 ) )
114 return ( numerator - aDenominator / 2 ) / aDenominator;
116 return ( numerator + aDenominator / 2 ) / aDenominator;
120 int64_t
sign = ( ( aNumerator < 0 ) ? -1 : 1 ) * ( aDenominator < 0 ? -1 : 1 ) *
121 ( aValue < 0 ? -1 : 1 );
125 int64_t c =
std::abs( aDenominator );
129 if( b <= std::numeric_limits<int>::max() && c <= std::numeric_limits<int>::max() )
131 if( a <= std::numeric_limits<int>::max() )
132 return sign * ( ( a * b + r ) / c );
134 return sign * ( a / c * b + ( a % c * b + r ) / c);
138 uint64_t a0 = a & 0xFFFFFFFF;
139 uint64_t a1 = a >> 32;
140 uint64_t b0 = b & 0xFFFFFFFF;
141 uint64_t b1 = b >> 32;
142 uint64_t t1 = a0 * b1 + a1 * b0;
143 uint64_t t1a = t1 << 32;
147 a1 = a1 * b1 + ( t1 >> 32 ) + ( a0 < t1a );
149 a1 += a0 < (uint64_t)r;
151 for( i = 63; i >= 0; i-- )
153 a1 += a1 + ( ( a0 >> i ) & 1 );
156 if( (uint64_t) c <= a1 )
wxString result
Test unit parsing edge cases and error handling.