dcomplex C16Pow( double a, double b, double c, double d ) {
//=========================================================
// Return the real part of the result of taking one double precision
// complex number to the power of another.
// ( a, b ) ** ( c, d ) = exp( ( c,d ) * log( a,b ) )
double u;
double v;
dcomplex arg1;
dcomplex arg2;
dcomplex res;
if( ( a == 0 ) && ( b == 0 ) ) {
if( d == 0 ) {
if( c > 0 ) {
res.realpart = 0;
res.imagpart = 0;
return( res );
}
}
arg1.realpart = a;
arg1.imagpart = b;
arg2.realpart = c;
arg2.imagpart = d;
return( __qmath2err( FP_FUNC_POW | M_DOMAIN | V_ZERO, &arg1, &arg2 ) );
} else {
u = DLOG( a*a + b*b ) / 2;
v = DATAN2( b, a );
res.realpart = DEXP( u*c - v*d );
res.imagpart = res.realpart;
u = u*d + v*c;
res.realpart *= DCOS( u );
res.imagpart *= DSIN( u );
return( res );
}
}
int
/* main(int argc, char *argv[]) */
whetstone_main()
{
/* used in the FORTRAN version */
long I;
long N1, N2, N3, N4, N6, N7, N8, N9, N10, N11;
double X1,X2,X3,X4,X,Y,Z;
long LOOP;
int II, JJ;
/* added for this version */
long loopstart;
long long startsec, finisec;
float KIPS;
int continuous;
loopstart = 1000000; /* see the note about LOOP below */
loopstart = 250000;
continuous = 0;
II = 1; /* start at the first arg (temp use of II here) */
/* while (II < argc) { */
/* if (strncmp(argv[II], "-c", 2) == 0 || argv[II][0] == 'c') { */
/* continuous = 1; */
/* } else if (atol(argv[II]) > 0) { */
/* loopstart = atol(argv[II]); */
/* } else { */
/* fprintf(stderr, USAGE); */
/* return(1); */
/* } */
/* II++; */
/* } */
LCONT:
/*
C
C Start benchmark timing at this point.
C
*/
startsec = get_microsec();// time(0);
/*
C
C The actual benchmark starts here.
C
*/
T = .499975;
T1 = 0.50025;
T2 = 2.0;
/*
C
C With loopcount LOOP=10, one million Whetstone instructions
C will be executed in EACH MAJOR LOOP..A MAJOR LOOP IS EXECUTED
C 'II' TIMES TO INCREASE WALL-CLOCK TIMING ACCURACY.
C
LOOP = 1000;
*/
LOOP = loopstart;
II = 1;
JJ = 1;
IILOOP:
N1 = 0;
N2 = 12 * LOOP;
N3 = 14 * LOOP;
N4 = 345 * LOOP;
N6 = 210 * LOOP;
N7 = 32 * LOOP;
N8 = 899 * LOOP;
N9 = 616 * LOOP;
N10 = 0;
N11 = 93 * LOOP;
/*
C
C Module 1: Simple identifiers
C
*/
X1 = 1.0;
X2 = -1.0;
X3 = -1.0;
X4 = -1.0;
for (I = 1; I <= N1; I++) {
X1 = (X1 + X2 + X3 - X4) * T;
X2 = (X1 + X2 - X3 + X4) * T;
X3 = (X1 - X2 + X3 + X4) * T;
X4 = (-X1+ X2 + X3 + X4) * T;
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N1,N1,N1,X1,X2,X3,X4);
#endif
/*
C
C Module 2: Array elements
C
*/
E1[1] = 1.0;
E1[2] = -1.0;
E1[3] = -1.0;
E1[4] = -1.0;
for (I = 1; I <= N2; I++) {
E1[1] = ( E1[1] + E1[2] + E1[3] - E1[4]) * T;
E1[2] = ( E1[1] + E1[2] - E1[3] + E1[4]) * T;
E1[3] = ( E1[1] - E1[2] + E1[3] + E1[4]) * T;
E1[4] = (-E1[1] + E1[2] + E1[3] + E1[4]) * T;
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N2,N3,N2,E1[1],E1[2],E1[3],E1[4]);
#endif
/*
C
C Module 3: Array as parameter
C
*/
for (I = 1; I <= N3; I++)
PA(E1);
#ifdef PRINTOUT
IF (JJ==II)POUT(N3,N2,N2,E1[1],E1[2],E1[3],E1[4]);
#endif
/*
C
C Module 4: Conditional jumps
C
*/
J = 1;
for (I = 1; I <= N4; I++) {
if (J == 1)
J = 2;
else
J = 3;
if (J > 2)
J = 0;
else
J = 1;
if (J < 1)
J = 1;
else
J = 0;
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N4,J,J,X1,X2,X3,X4);
#endif
/*
C
C Module 5: Omitted
C Module 6: Integer arithmetic
C
*/
J = 1;
K = 2;
L = 3;
for (I = 1; I <= N6; I++) {
J = J * (K-J) * (L-K);
K = L * K - (L-J) * K;
L = (L-K) * (K+J);
E1[L-1] = J + K + L;
E1[K-1] = J * K * L;
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N6,J,K,E1[1],E1[2],E1[3],E1[4]);
#endif
/*
C
C Module 7: Trigonometric functions
C
*/
X = 0.5;
Y = 0.5;
for (I = 1; I <= N7; I++) {
X = T * DATAN(T2*DSIN(X)*DCOS(X)/(DCOS(X+Y)+DCOS(X-Y)-1.0));
Y = T * DATAN(T2*DSIN(Y)*DCOS(Y)/(DCOS(X+Y)+DCOS(X-Y)-1.0));
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N7,J,K,X,X,Y,Y);
#endif
/*
C
C Module 8: Procedure calls
C
*/
X = 1.0;
Y = 1.0;
Z = 1.0;
for (I = 1; I <= N8; I++)
P3(X,Y,&Z);
#ifdef PRINTOUT
IF (JJ==II)POUT(N8,J,K,X,Y,Z,Z);
#endif
/*
C
C Module 9: Array references
C
*/
J = 1;
K = 2;
L = 3;
E1[1] = 1.0;
E1[2] = 2.0;
E1[3] = 3.0;
for (I = 1; I <= N9; I++)
P0();
#ifdef PRINTOUT
IF (JJ==II)POUT(N9,J,K,E1[1],E1[2],E1[3],E1[4]);
#endif
/*
C
C Module 10: Integer arithmetic
C
*/
J = 2;
K = 3;
for (I = 1; I <= N10; I++) {
J = J + K;
K = J + K;
J = K - J;
K = K - J - J;
}
#ifdef PRINTOUT
IF (JJ==II)POUT(N10,J,K,X1,X2,X3,X4);
#endif
/*
C
C Module 11: Standard functions
C
*/
X = 0.75;
for (I = 1; I <= N11; I++)
X = DSQRT(DEXP(DLOG(X)/T1));
#ifdef PRINTOUT
IF (JJ==II)POUT(N11,J,K,X,X,X,X);
#endif
/*
C
C THIS IS THE END OF THE MAJOR LOOP.
C
*/
if (++JJ <= II)
goto IILOOP;
/*
C
C Stop benchmark timing at this point.
C
*/
finisec = get_microsec();// time(0);
/*
C----------------------------------------------------------------
C Performance in Whetstone KIP's per second is given by
C
C (100*LOOP*II)/TIME
C
C where TIME is in seconds.
C--------------------------------------------------------------------
*/
_printf("\n");
if (finisec-startsec <= 0) {
_printf("Insufficient duration- Increase the LOOP count\n");
return(1);
}
_printf("Loops: %ld, Iterations: %d, Duration: %lld sec.\n",
LOOP, II, (finisec-startsec)/1000000);
KIPS = (100.0*LOOP*II)/((double)(finisec-startsec)/1000000.0); //(((double)(finisec-startsec)) / (double)CLOCKS_PER_SEC );
if (KIPS >= 1000.0){
_printf("C Converted Double Precision Whetstones: %.1f MIPS\n", KIPS/1000.0);
}
else{
_printf("C Converted Double Precision Whetstones: %.1f KIPS\n", KIPS);
}
if (continuous)
goto LCONT;
return(0);
}
