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

Table of contents


NAME

pdotf, pdot, pdotl, pdotw, pdotq, pdotll, pdotdf, pdotd, pdotdl, pdotdll - pair-precision dot product

SYNOPSIS

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

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

extern void pdotf (float_pair result, int n, const float [/ * n * /] x, const float [/ * n * /] y);

extern void pdot (double_pair result, int n, const double [/ * n * /] x, const double [/ * n * /] y);

extern void pdotl (long_double_pair result, int n, const long_double [/ * n * /] x,
                   const long_double [/ * n * /] y);

extern void pdotw (__float80_pair result, int n, const __float80 [/ * n * /] x,
                   const __float80 [/ * n * /] y);

extern void pdotq (__float128_pair result, int n, const __float128 [/ * n * /] x,
                   const __float128 [/ * n * /] y);

extern void pdotll (long_long_double_pair result, int n, const long_long_double [/ * n * /] x,
                    const long_long_double [/ * n * /] y);

extern void pdotdf (decimal_float_pair result, int n, const decimal_float [/ * n * /] x,
                    const decimal_float [/ * n * /] y);

extern void pdotd (decimal_double_pair result, int n, const decimal_double [/ * n * /] x,
                   const decimal_double [/ * n * /] y);

extern void pdotdl (decimal_long_double_pair result, int n, const decimal_long_double [/ * n * /] x,
                    const decimal_long_double [/ * n * /] y);

extern void pdotdll (decimal_long_long_double_pair result, int n,
                     const decimal_long_long_double [/ * n * /] x,
                     const decimal_long_long_double [/ * n * /] y);

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


DESCRIPTION

Compute the vector dot product, sum(k = 0 to (n-1)) x[k] * y[k], of ordinary floating-point values in pair-precision arithmetic for enhanced accuracy.

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), 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), 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).