1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/f/runtime/libF77/c_log.c b/gcc/f/runtime/libF77/c_log.c
new file mode 100644
index 00000000000..6715131ad1d
--- /dev/null
+++ b/gcc/f/runtime/libF77/c_log.c
@@ -0,0 +1,21 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+extern double log(), f__cabs(), atan2();
+VOID c_log(resx, z) complex *resx, *z;
+#else
+#undef abs
+#include <math.h>
+extern double f__cabs(double, double);
+
+void c_log(complex *resx, complex *z)
+#endif
+{
+complex res;
+
+res.i = atan2(z->i, z->r);
+res.r = log( f__cabs(z->r, z->i) );
+
+resx->r = res.r;
+resx->i = res.i;
+}