cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float exp2m1f (float x); extern double exp2m1 (double x); extern long double exp2m1l (long double x); extern __float80 exp2m1w (__float80 x); extern __float128 exp2m1q (__float128 x); extern long_long_double exp2m1ll (long_long_double x); extern decimal_float exp2m1df (decimal_float x); extern decimal_double exp2m1d (decimal_double x); extern decimal_long_double exp2m1dl (decimal_long_double x); extern decimal_long_long_double exp2m1dll (decimal_long_long_double x);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
For arguments of small magnitude, exp2m1(x) retains full accuracy, while direct computation of exp2(x) - 1 suffers loss of leading significant digits.