diff options
Diffstat (limited to 'gcc/f/runtime/libF77/pow_zz.c')
-rw-r--r-- | gcc/f/runtime/libF77/pow_zz.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/f/runtime/libF77/pow_zz.c b/gcc/f/runtime/libF77/pow_zz.c new file mode 100644 index 00000000000..20faf29cfb8 --- /dev/null +++ b/gcc/f/runtime/libF77/pow_zz.c @@ -0,0 +1,23 @@ +#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); +} |