float64ToCommonNaN
return commonNaNToFloat32( float64ToCommonNaN( a ) );
if ( aSig ) return commonNaNToFloat32( float64ToCommonNaN( a ) );
if ( aSig ) return commonNaNToFloatx80( float64ToCommonNaN( a ) );
if ( aSig ) return commonNaNToFloat128( float64ToCommonNaN( a ) );