There is no true quad support on x86. GCC implements double-double quads[1] via software emulation on many targets. [1] https://en.wikipedia.org/wiki/Quadruple

There is no true quad support on x86. GCC implements double-double quads[1] via software emulation on many targets. [1] https://en.wikipedia.org/wiki/Quadruple-precision_floating-point_format#Double-double_arithmetic https://en.wikipedia.org/wiki/Quadruple-precision_floating-p...