--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cgen/templates/default/yield_from	Fri May 11 16:21:51 2012 -0700
@@ -0,0 +1,34 @@
+
+        TARGET(YIELD_FROM)
+            u = POP();
+            x = TOP();
+            /* send u to x */
+            if (PyGen_CheckExact(x)) {
+                retval = _PyGen_Send((PyGenObject *)x, u);
+            } else {
+                _Py_IDENTIFIER(send);
+                if (u == Py_None)
+                    retval = PyIter_Next(x);
+                else
+                    retval = _PyObject_CallMethodId(x, &PyId_send, "O", u);
+            }
+            Py_DECREF(u);
+            if (!retval) {
+                PyObject *val;
+                x = POP(); /* Remove iter from stack */
+                Py_DECREF(x);
+                err = PyGen_FetchStopIterationValue(&val);
+                if (err < 0) {
+                    x = NULL;
+                    goto on_error;
+                }
+                x = val;
+                PUSH(x);
+                goto fast_next_opcode;
+            }
+            /* x remains on stack, retval is value to be yielded */
+            f->f_stacktop = stack_pointer;
+            why = WHY_YIELD;
+            /* and repeat... */
+            f->f_lasti--;
+            goto fast_yield;