fix conv fuse bug

Author: xzhu1900

lib/backends/webgl/ops/conv.ts

@@ -3,7 +3,7 @@
 
 import {Attribute} from '../../../attribute';
 import {Logger} from '../../../instrument';
-import {Conv} from '../../../ops/conv';
+import {Conv, getActicationSnippet} from '../../../ops/conv';
 import {Tensor} from '../../../tensor';
 import {PoolConvUtil} from '../../../util';
 import {getGlsl} from '../glsl-source';
@@ -12,7 +12,6 @@ import {Artifact, ProgramInfo, RunData, TextureLayout, WebGLOperator} from '../t
 import {WebGLContext} from '../webgl-context';
 
 import {WebGLConvPacked} from './conv-pack';
-import {glslRelu, glslSigmoid} from './unary-op';
 
 export class WebGLConv extends Conv {
   unpackedGroupedConvImpl: WebGLUnpackedGroupedConv;
@@ -146,28 +145,6 @@ export class WebGLUnpackedGroupedConv extends Conv implements WebGLOperator {
   }
 }
 
-function getActicationSnippet(activation: string) {
-  let activationFunction = '';
-  let activationName = '';
-  switch (activation) {
-    case 'Relu':
-      activationName = glslRelu().name;
-      activationFunction = glslRelu().body;
-      break;
-    case 'Sigmoid':
-      activationName = glslSigmoid().name;
-      activationFunction = glslSigmoid().body;
-      break;
-    default:
-      activationName = '';
-      activationFunction = '';
-  }
-  const applyActivation = activation ? `
-  value = ${activationName}(value);` :
-                                       '';
-  return {activationFunction, applyActivation};
-}
-
 export class WebGLUnpackedConv extends Conv {
   run(inferenceHandler: WebGLInferenceHandler, inputs: Tensor[]): Tensor[] {
     const programManager = inferenceHandler.session.programManager;
@@ -242,7 +219,6 @@ export class WebGLUnpackedConv extends Conv {
         let blend = false;
         for (let k = 0; k < sharedDim; k += sharedDimReadSize) {
           Logger.verbose('MatMul2D', `k = ${k}, sharedDim: ${sharedDim}, readSize = ${sharedDimReadSize}`);
-
           if (k === sharedDimReadSize) {
             blend = true;
             gl.enable(gl.BLEND);
@@ -348,7 +324,7 @@ export class WebGLUnpackedConv extends Conv {
     const outputLayout = inferenceHandler.createTextureLayoutFromShape(outputShape);
     const initValue = (inputs.length < 3) ? '0.0' : '_B(b)';
     const sharedDim = im2colLayout.shape[3];
-    const blendEnabled = inferenceHandler.session.backend.glContext.isBlendSupported;
+    const blendEnabled = inferenceHandler.session.backend.glContext.isBlendSupported && !this.activation;
     const sharedDimReadSize = blendEnabled && inferenceHandler.session.backend.matmulMaxBatchSize ?
         this.calcSharedDimReadSize(inferenceHandler.session.backend.matmulMaxBatchSize, sharedDim) :
         sharedDim;

lib/ops/conv.ts

@@ -3,6 +3,7 @@
 
 import {Attribute} from '../attribute';
 import {InferenceHandler} from '../backend';
+import {glslRelu, glslSigmoid} from '../backends/webgl/ops/unary-op';
 import {Operator} from '../operators';
 import {Tensor} from '../tensor';
 
@@ -91,3 +92,25 @@ export abstract class Conv implements Operator {
   protected strides: number[];
   protected activation: string;
 }
+
+export function getActicationSnippet(activation: string) {
+  let activationFunction = '';
+  let activationName = '';
+  switch (activation) {
+    case 'Relu':
+      activationName = glslRelu().name;
+      activationFunction = glslRelu().body;
+      break;
+    case 'Sigmoid':
+      activationName = glslSigmoid().name;
+      activationFunction = glslSigmoid().body;
+      break;
+    default:
+      activationName = '';
+      activationFunction = '';
+  }
+  const applyActivation = activation ? `
+  value = ${activationName}(value);` :
+                                       '';
+  return {activationFunction, applyActivation};
+}