change fp64 buffer type from double4 to double

Author: kmpeng

test/Feature/HLSLLib/dot.fp64.test

@@ -1,22 +1,22 @@
 #--- source.hlsl
-StructuredBuffer<double4> X : register(t0);
-StructuredBuffer<double4> Y : register(t1);
+StructuredBuffer<double> X : register(t0);
+StructuredBuffer<double> Y : register(t1);
 
 RWStructuredBuffer<double> Out : register(u2);
 
 
 [numthreads(1,1,1)]
 void main() {
-  Out[0] = dot(X[0].x, Y[0].x);
+  Out[0] = dot(X[0], Y[0]);
   Out[1] = dot(double(1.125), double(7.29));
 
-  Out[2] = dot(X[0].y, Y[0].y);
+  Out[2] = dot(X[1], Y[1]);
   Out[3] = dot(double(-2.5), double(3.14));
 
-  Out[4] = dot(X[0].z, Y[0].z);
+  Out[4] = dot(X[2], Y[2]);
   Out[5] = dot(double(-4.75), double(-1.1));
 
-  Out[6] = dot(X[0].w, Y[0].w);
+  Out[6] = dot(X[3], Y[3]);
   Out[7] = dot(double(6.625), double(-3.5));
 }
 //--- pipeline.yaml
@@ -29,11 +29,11 @@ Shaders:
 Buffers:
   - Name: X
     Format: Float64
-    Stride: 32
+    Stride: 8
     Data: [ 1.125, -2.5, -4.75, 6.625 ]
   - Name: Y
     Format: Float64
-    Stride: 32
+    Stride: 8
     Data: [ 7.29, 3.14, -1.1, -3.5 ]
   - Name: Out
     Format: Float64