1 files changed, 19 insertions, 0 deletions

diff --git a/lib/libF77/c_exp.c b/lib/libF77/c_exp.c
new file mode 100644
index 000000000000..8252c7f7012b
--- /dev/null
+++ b/lib/libF77/c_exp.c
@@ -0,0 +1,19 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+extern double exp(), cos(), sin();
+
+ VOID c_exp(r, z) complex *r, *z;
+#else
+#undef abs
+#include "math.h"
+
+void c_exp(complex *r, complex *z)
+#endif
+{
+double expx;
+
+expx = exp(z->r);
+r->r = expx * cos(z->i);
+r->i = expx * sin(z->i);
+}