chrishkchris commented on a change in pull request #515: SINGA-474 Add gemm
operator
URL: https://github.com/apache/incubator-singa/pull/515#discussion_r314934800
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File path: python/singa/autograd.py
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@@ -2316,3 +2315,37 @@ def backward(self, dy):
def max(a,b):
return Max()(a,b)[0]
+class GEMM(Operation):
+ def __init__(self, alpha, beta, transA, transB):
+ self.alpha = alpha
+ self.beta = beta
+ self.transA = transA
+ self.transB = transB
+ super(GEMM, self).__init__()
+
+ def forward(self, A, B, C):
+ if self.transA:
+ A = singa.DefaultTranspose(A)
+ if self.transB:
+ B = singa.DefaultTranspose(B)
+ if training:
+ self.A = A
+ self.B = B
+
+ singa.MultWithScale(self.alpha, A, B, self.beta, C)
+ return C
+
+ def backward(self, dY):
+ dC = singa.MultFloat(dY, self.beta)
Review comment:
Is the backward the same when transA and transB =1 or 0?
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