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fixed gpu function exprs bug #42

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fixed gpu function exprs bug #42

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10 changes: 6 additions & 4 deletions breze/arch/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,9 @@ def cpu_expr_to_gpu(expr, unsafe=False):
If unsafe is set to True, subsequent function calls evaluating the
expression might return arrays pointing at the same memory region.
"""
if isinstance(expr, theano.sandbox.cuda.var.CudaNdarrayVariable):
return expr

expr_ = T.cast(expr, 'float32')
expr_ = theano.Out(theano.sandbox.cuda.basic_ops.gpu_from_host(expr),
borrow=unsafe)
Expand Down Expand Up @@ -421,14 +424,13 @@ def _unify_exprs(self, exprs):
if isinstance(exprs, (str, unicode)):
# We are only being given a single string expression.
exprs = self.exprs[exprs]
elif isinstance(exprs, theano.tensor.basic.TensorVariable):
# TODO: does this work in case of the GPU?
exprs = exprs
else:
elif isinstance(exprs, list):
# We have several, either string or variable, thus make it a list
# and substitute the strings.
exprs = list(exprs)
exprs = [self.exprs[i] if isinstance(i, str) else i for i in exprs]
else:
exprs = exprs

return exprs

Expand Down