#endif#define KILOBYTES(1<10#define MEGABYTES(1<20#define ">

Derivative Fields Code - #include...

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#include <stdio.h> #include "cow.h" #if (COW_MPI) #include <mpi.h> #endif #define KILOBYTES (1<<10) #define MEGABYTES (1<<20) #define GETENVINT(a,dflt) (getenv(a) ? atoi(getenv(a)) : dflt) #define GETENVDBL(a,dflt) (getenv(a) ? atof(getenv(a)) : dflt) static void divcorner ( double * result, double ** args, int ** s, cow_domain * d) { #define M(i,j,k) ((i)*s[0][0] + (j)*s[0][1] + (k)*s[0][2]) double * fx = & args[ 0 ][ 0 ]; double * fy = & args[ 0 ][ 1 ]; double * fz = & args[ 0 ][ 2 ]; * result = ((fx[M( 1 , 0 , 0 )] + fx[M( 1 , 1 , 0 )] + fx[M( 1 , 0 , 1 )] + fx[M( 1 , 1 , 1 )]) - (fx[M( 0 , 0 , 0 )] + fx[M( 0 , 1 , 0 )] + fx[M( 0 , 0 , 1 )] + fx[M( 0 , 1 , 1 )])) / 4.0 + ((fy[M( 0 , 1 , 0 )] + fy[M( 0 , 1 , 1 )] + fy[M( 1 , 1 , 0 )] + fy[M( 1 , 1 , 1 )]) - (fy[M( 0 , 0 , 0 )] + fy[M( 0 , 0 , 1 )] + fy[M( 1 , 0 , 0 )] + fy[M( 1 , 0 , 1 )])) / 4.0 + ((fz[M( 0 , 0 , 1 )] + fz[M( 1 , 0 , 1 )] + fz[M( 0 , 1 , 1 )] + fz[M( 1 , 1 , 1 )]) - (fz[M( 0 , 0 , 0 )] + fz[M( 1 , 0 , 0 )] + fz[M( 0 , 1 , 0 )] + fz[M( 1 , 1 , 0 )])) / 4.0 ; #undef M } static void div5 ( double * result, double ** args, int ** s, cow_domain * d) { #define diff5(f,s) ((-f[2*s] + 8*f[s] - 8*f[-s] + f[-2*s]) / 12.0) double * f0 = & args[ 0 ][ 0 ]; double * f1 = & args[ 0 ][ 1 ]; double * f2 = & args[ 0 ][ 2 ]; * result = diff5(f0, s[ 0 ][ 0 ]) + diff5(f1, s[ 0 ][ 1 ]) + diff5(f2, s[ 0 ][ 2 ]); #undef diff5 } static void curl ( double * result, double ** args, int ** s, cow_domain * d) { // #define diff5(f,s) ((-f[2*s] + 8*f[s] - 8*f[-s] + f[-2*s]) / 12.0) double * f0 = & args[ 0 ][ 0 ]; double * f1 = & args[ 0 ][ 1 ]; double * f2 = & args[ 0 ][ 2 ]; result[ 0 ] = diff5(f2, s[ 0 ][ 1 ]) - diff5(f1, s[ 0 ][ 2 ]); result[ 1 ] = diff5(f0, s[ 0 ][ 2 ]) - diff5(f2, s[ 0 ][ 0 ]); result[ 2 ] = diff5(f1, s[ 0 ][ 0 ]) - diff5(f0, s[ 0 ][ 1 ]); #undef diff5 } static void crossprod ( double * result, double ** args, int ** s, cow_domain * d) { double a0 =
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