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nf_polevl.cc
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the newest version in sPHENIX GitHub for file nf_polevl.cc
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/* polevl.c
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* p1evl.c
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*
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* Evaluate polynomial
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*
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*
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* SYNOPSIS:
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*
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* int N;
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* double x, y, coef[N+1], nf_polevl[];
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*
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* y = nf_polevl( x, coef, N );
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*
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*
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* DESCRIPTION:
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*
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* Evaluates polynomial of degree N:
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*
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* 2 N
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* y = C + C x + C x +...+ C x
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* 0 1 2 N
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*
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* Coefficients are stored in reverse order:
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*
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* coef[0] = C , ..., coef[N] = C .
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* N 0
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*
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* The function p1evl() assumes that coef[N] = 1.0 and is
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* omitted from the array. Its calling arguments are
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* otherwise the same as nf_polevl().
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*
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*/
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/*
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Cephes Math Library Release 2.1: December, 1988
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Copyright 1984, 1987, 1988 by Stephen L. Moshier
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Direct inquiries to 30 Frost Street, Cambridge, MA 02140
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*/
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#include "
nf_specialFunctions.h
"
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#if defined __cplusplus
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namespace
GIDI {
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using namespace
GIDI;
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#endif
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double
nf_polevl
(
double
x
,
double
coef[],
int
N
) {
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double
ans;
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int
i;
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double
*
p
;
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p = coef;
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ans = *p++;
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i =
N
;
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do
{
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ans = ans * x + *p++; }
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while
( --i );
// Loop checking, 11.06.2015, T. Koi
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return
( ans );
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}
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/*
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************************************************************
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*/
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/* Evaluate polynomial when coefficient of x^N is 1.0. Otherwise same as polevl. */
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double
nf_p1evl
(
double
x
,
double
coef[],
int
N
) {
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double
ans;
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double
*
p
;
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int
i;
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p = coef;
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ans = x + *p++;
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i = N-1;
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do
{
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ans = ans * x + *p++; }
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while
( --i );
// Loop checking, 11.06.2015, T. Koi
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return
( ans );
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}
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#if defined __cplusplus
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}
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#endif
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nf_polevl.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:46
using
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