PHYPOT 3CW "12 July 2007" "mathcw-1.00"

Table of contents


NAME

phypotf, phypot, phypotl, phypotw, phypotq, phypotll, phypotdf, phypotd, phypotdl, phypotdll - pair-precision Euclidean distance

SYNOPSIS

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

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

extern void phypotf (float_pair result, const float_pair x, const float_pair y);

extern void phypot (double_pair result, const double_pair x, const double_pair y);

extern void phypotl (long_double_pair result, const long_double_pair x, const long_double_pair y);

extern void phypotw (__float80_pair result, const __float80_pair x, const __float80_pair y);

extern void phypotq (__float128_pair result, const __float128_pair x, const __float128_pair y);

extern void phypotll (long_long_double_pair result, const long_long_double_pair x,
                    const long_long_double_pair y);

extern void phypotdf (decimal_float_pair result, const decimal_float_pair x, const decimal_float_pair y);

extern void phypotd (decimal_double_pair result, const decimal_double_pair x, const decimal_double_pair y);

extern void phypotdl (decimal_long_double_pair result, const decimal_long_double_pair x, const decimal_long_double_pair y);

extern void phypotdll (decimal_long_long_double_pair result, const decimal_long_long_double_pair x,
                     const decimal_long_long_double_pair y);

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


DESCRIPTION

Compute the square root of the sum of the squares of the two arguments without undue overflow or underflow.

Caution: The mathematically-equivalent formula psqrt(result, xsquare, ysquare) is not robust, and should not be used.


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), pexpm1(3CW), pfdim(3CW), pfmax(3CW), pfmin(3CW), pfrexp(3CW), pfrexph(3CW), phigh(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).