// of the high part, and we merge the mantissa of the high part with the
// mantissa (and the implicit leading bit) of the low part.
using uint_t = unsigned __int128;
- uint_t value_bits = 0;
- memcpy(&value_bits, &value, sizeof(value_bits));
+ uint64_t value_bits[2] = {};
+ memcpy(value_bits, &value, sizeof(value_bits));
- const uint64_t value_hi = value_bits;
- const uint64_t value_lo = value_bits >> 64;
+ const uint64_t value_hi = value_bits[0];
+ const uint64_t value_lo = value_bits[1];
uint64_t mantissa_hi = value_hi & ((1ull << 52) - 1);
unsigned exponent_hi = (value_hi >> 52) & ((1ull << 11) - 1);