added log

compile.py

@@ -45,6 +45,7 @@ def experimental_linker(env, target = None):
     else:
         raise NotImplementedError("Cannot write thunk representation to a file.")
 
+
 # def experimental_linker(env, target = None):
 #     def fetch(op):
 #         try:

core.py

@@ -794,6 +794,14 @@ class exp(elemwise):
         return "z_i = exp(x_i);"
 
 
+## Logarithm ##
+
+class log(elemwise):
+    impl = numpy.log
+    def c_foreach((x_i, ), (z_i, )):
+        return "z_i = log(x_i);"
+    
+
 ## Element-wise division ##
 
 class div_elemwise(elemwise):