Added operators for ceil and floor.

theano/scalar/basic.py

@@ -1013,6 +1013,24 @@ class Sgn(UnaryScalarOp):
         return "%(z)s = (%(x)s >= 0) ? (%(x)s == 0) ? 0.0 : 1.0 : -1.0;" % locals()
 sgn = Sgn(same_out, name = 'sgn')
 
+class Ceil(UnaryScalarOp):
+    def impl(self, x):
+        return numpy.ceil(x)
+    def grad(self, (x,), (gz,)):
+        return None,
+    def c_code(self, node, name, (x,), (z,), sub):
+        return "%(z)s = ceil(%(x)s);" % locals()
+ceil = Ceil(same_out, name = 'ceil')
+
+class Floor(UnaryScalarOp):
+    def impl(self, x):
+        return numpy.floor(x)
+    def grad(self, (x,), (gz,)):
+        return None,
+    def c_code(self, node, name, (x,), (z,), sub):
+        return "%(z)s = floor(%(x)s);" % locals()
+floor = Floor(same_out, name = 'ceil')
+
 class IRound(UnaryScalarOp):
     def impl(self, x):
         return numpy.asarray(numpy.round(x), dtype = 'int64')

theano/tensor/basic.py

@@ -1383,6 +1383,14 @@ def log10(a):
 def sgn(a):
     """sign of a"""
 
+@_scal_elemwise
+def ceil(a):
+    """ceiling of a"""
+
+@_scal_elemwise
+def floor(a):
+    """floor of a"""
+
 @_scal_elemwise
 def iround(a):
     """int(round(a))"""

theano/tensor/inplace.py

@@ -112,6 +112,14 @@ def log10_inplace(a):
 def sgn_inplace(a):
     """sign of `a` (inplace on `a`)"""
 
+@_scal_inplace
+def ceil_inplace(a):
+    """ceil of `a` (inplace on `a`)"""
+
+@_scal_inplace
+def floor_inplace(a):
+    """floor of `a` (inplace on `a`)"""
+
 @_scal_inplace
 def iround_inplace(a):
     """int(round(a)) (inplace on `a`)"""