AndrewZhaoLuo commented on code in PR #13469:
URL: https://github.com/apache/tvm/pull/13469#discussion_r1035126503
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src/relay/qnn/op/batch_matmul.cc:
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@@ -175,27 +200,32 @@ Expr QnnBatchMatmulCanonicalize(const Attrs& attrs, const
Array<Expr>& new_args,
const auto* qnn_batch_matmul_attrs = attrs.as<BatchMatmulAttrs>();
- // Extract the integer zero points.
- auto y_zero_point_int = GetScalarFromConstant<int>(y_zero_point);
- auto x_zero_point_int = GetScalarFromConstant<int>(x_zero_point);
-
// Get all the terms as described in the comments.
auto term1 = BatchMatmulFirstTerm(quantized_x, quantized_y,
qnn_batch_matmul_attrs);
auto term2 = BatchMatmulSecondTerm(quantized_x, y_zero_point);
auto term3 = BatchMatmulThirdTerm(quantized_y, x_zero_point,
broadcast_dim_size);
- auto term4 = BatchMatmulFourthTerm(x_zero_point_int, y_zero_point_int,
reduction_dim_size);
-
- // Combine those 4 terms depending on the zero points to get the best
lowering.
- if (x_zero_point_int == 0 && y_zero_point_int == 0) {
- // term 2, 3 and 4 become zero.
- return term1;
- } else if (x_zero_point_int == 0 && y_zero_point_int != 0) {
- // term 3 and term 4 become zero.
- return Subtract(term1, term2);
- } else if (x_zero_point_int != 0 && y_zero_point_int == 0) {
- // term 2 and term 4 become zero.
- return Subtract(term1, term3);
+
+ // TODO(vvchernov): how do additional checs (equal) influence on performance?
+ if (IsConstScalar(x_zero_point) && IsConstScalar(y_zero_point)) {
+ // Extract the integer zero points.
+ auto y_zero_point_int = GetScalarFromConstant<int>(y_zero_point);
+ auto x_zero_point_int = GetScalarFromConstant<int>(x_zero_point);
+ auto term4 = BatchMatmulFourthTerm(x_zero_point_int, y_zero_point_int,
reduction_dim_size);
+ // Combine those 4 terms depending on the zero points to get the best
lowering.
+ if (x_zero_point_int == 0 && y_zero_point_int != 0) {
Review Comment:
I believe some copy pasting was wrong here.
We want
`if (x_zero_point_int == 0 && y_zero_point_int == 0) {`
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