1 files changed, 21 insertions, 0 deletions

diff --git a/contrib/libf2c/libF77/z_exp.c b/contrib/libf2c/libF77/z_exp.c
new file mode 100644
index 000000000000..85fb63e42095
--- /dev/null
+++ b/contrib/libf2c/libF77/z_exp.c
@@ -0,0 +1,21 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+double exp(), cos(), sin();
+VOID z_exp(resx, z) doublecomplex *resx, *z;
+#else
+#undef abs
+#include <math.h>
+void z_exp(doublecomplex *resx, doublecomplex *z)
+#endif
+{
+double expx;
+doublecomplex res;
+
+expx = exp(z->r);
+res.r = expx * cos(z->i);
+res.i = expx * sin(z->i);
+
+resx->r = res.r;
+resx->i = res.i;
+}