PEXPM1 3CW "16 April 2007" "mathcw-1.00"

Table of contents


NAME

pexpm1f, pexpm1, pexpm1l, pexpm1w, pexpm1q, pexpm1ll, pexpm1df, pexpm1d, pexpm1dl, pexpm1dll - pair-precision exp(x) - 1

SYNOPSIS

cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]

#include <mathcw.h>
#include <paircw.h>

extern void pexpm1f (float_pair result, const float_pair x);

extern void pexpm1 (double_pair result, const double_pair x);

extern void pexpm1l (long_double_pair result, const long_double_pair x);

extern void pexpm1w (__float80_pair result, const __float80_pair x);

extern void pexpm1q (__float128_pair result, const __float128_pair x);

extern void pexpm1ll (long_long_double_pair result, const long_long_double_pair x);

extern void pexpm1df (decimal_float_pair result, const decimal_float_pair x);

extern void pexpm1d (decimal_double_pair result, const decimal_double_pair x);

extern void pexpm1dl (decimal_long_double_pair result, decimal_long_double_pair x);

extern void pexpm1dll (decimal_long_long_double_pair result, decimal_long_long_double_pair x);

NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.


DESCRIPTION

Compute the pair-precision exponential function of x, less 1.

For arguments of small magnitude, pexp(x) - 1 suffers loss of leading significant digits, but the pexpm1(x) function remains accurate.

Caution: Because the function grows rapidly for arguments of large magnitude, it approaches Infinity fairly quickly.


RETURN VALUES

None. The function result is stored in the first argument, result.

ERRORS

None.

SEE ALSO

pabs(3CW), pacos(3CW), pacosh(3CW), padd(3CW), pasin(3CW), pasinh(3CW), patan(3CW), patan2(3CW), patanh(3CW), pcbrt(3CW), pcmp(3CW), pcon(3CW), pcopy(3CW), pcopysign(3CW), pcos(3CW), pcosh(3CW), pcotan(3CW), pdiv(3CW), pdot(3CW), peps(3CW), peval(3CW), pexp(3CW), pexp10(3CW), pexp16(3CW), pexp2(3CW), pexp8(3CW), pfdim(3CW), pfmax(3CW), pfmin(3CW), pfrexp(3CW), pfrexph(3CW), phigh(3CW), phypot(3CW), pierf(3CW), pierfc(3CW), pilogb(3CW), pin(3CW), pinfty(3CW), pipow(3CW), pisinf(3CW), pisnan(3CW), pisqnan(3CW), pissnan(3CW), pldexp(3CW), pldexph(3CW), plog(3CW), plog101p(3CW), plog1p(3CW), plow(3CW), pmul(3CW), pmul2(3CW), pneg(3CW), pout(3CW), pprosum(3CW), pqnan(3CW), pscalbln(3CW), pscalbn(3CW), pset(3CW), psignbit(3CW), psin(3CW), psinh(3CW), psnan(3CW), psplit(3CW), psqrt(3CW), psub(3CW), psum(3CW), psum2(3CW), ptan(3CW), ptanh(3CW).