mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 08:03:41 +08:00
24 lines
482 B
C
24 lines
482 B
C
#include "f2c.h"
|
|
|
|
#ifdef KR_headers
|
|
double log(), exp(), cos(), sin(), atan2(), f__cabs();
|
|
VOID pow_zz(r,a,b) doublecomplex *r, *a, *b;
|
|
#else
|
|
#undef abs
|
|
#include <math.h>
|
|
extern double f__cabs(double,double);
|
|
void pow_zz(doublecomplex *r, doublecomplex *a, doublecomplex *b)
|
|
#endif
|
|
{
|
|
double logr, logi, x, y;
|
|
|
|
logr = log( f__cabs(a->r, a->i) );
|
|
logi = atan2(a->i, a->r);
|
|
|
|
x = exp( logr * b->r - logi * b->i );
|
|
y = logr * b->i + logi * b->r;
|
|
|
|
r->r = x * cos(y);
|
|
r->i = x * sin(y);
|
|
}
|