/* Excess precision when using a 64-bit mantissa for FPU math ops can
   cause unexpected results with some of the MSVCRT math functions.  For
   example, unless the function return value is stored (truncating to
   53-bit mantissa), calls to pow with both x and y as integral values
   sometimes produce a non-integral result.
   One workaround is to reset the FPU env to 53-bit mantissa
   by a call to fesetenv (FE_PC53_ENV).  Amother is to force storage
   of the return value of individual math functions using wrappers.
   NB, using these wrappers will disable builtin math functions and
   hence disable the folding of function results at compile time when
   arguments are constant.  */