[dtests] __shfl_up and __shfl_down tests (#1899)

tests/src/kernel/hipShflUpDownTest.cpp

@@ -0,0 +1,102 @@
+/*
+Copyright (c) 2015-present Advanced Micro Devices, Inc. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+/* HIT_START
+ * BUILD: %t %s ../test_common.cpp
+ * TEST: %t
+ * HIT_END
+ */
+
+#include <iostream>
+#include <hip/hip_runtime.h>
+#include "test_common.h"
+
+template <typename T>
+__global__ void shflDownSum(T* a, int size) {
+    T val = a[threadIdx.x];
+    for (int i = size / 2; i > 0; i /= 2) {
+        val += __shfl_down(val, i, size);
+    }
+    a[threadIdx.x] = val;
+}
+
+template <typename T>
+__global__ void shflUpSum(T* a, int size) {
+    T val = a[threadIdx.x];
+    for (int i = size / 2; i > 0; i /= 2) {
+        val += __shfl_up(val, i, size);
+    }
+    a[threadIdx.x] = val;
+}
+
+template <typename T>
+void runTestShflUp() {
+    const int size = 32;
+    T a[size];
+    T cpuSum = 0;
+    for (int i = 0; i < size; i++) {
+        a[i] = i;
+        cpuSum += a[i];
+    }
+    T* d_a;
+    hipMalloc(&d_a, sizeof(T) * size);
+    hipMemcpy(d_a, &a, sizeof(T) * size, hipMemcpyDefault);
+    hipLaunchKernelGGL(shflUpSum<T>, 1, size, 0, 0, d_a, size);
+    hipMemcpy(&a, d_a, sizeof(T) * size, hipMemcpyDefault);
+    if (a[size - 1] != cpuSum) {
+        hipFree(d_a);
+        failed("Shfl Up Sum did not match.");
+    }
+    hipFree(d_a);
+}
+
+template <typename T>
+void runTestShflDown() {
+    const int size = 32;
+    T a[size];
+    T cpuSum = 0;
+    for (int i = 0; i < size; i++) {
+        a[i] = i;
+        cpuSum += a[i];
+    }
+    T* d_a;
+    hipMalloc(&d_a, sizeof(T) * size);
+    hipMemcpy(d_a, &a, sizeof(T) * size, hipMemcpyDefault);
+    hipLaunchKernelGGL(shflDownSum<T>, 1, size, 0, 0, d_a, size);
+    hipMemcpy(&a, d_a, sizeof(T) * size, hipMemcpyDefault);
+    if (a[0] != cpuSum) {
+        hipFree(d_a);
+        failed("Shfl Up Sum did not match.");
+    }
+    hipFree(d_a);
+}
+int main() {
+    runTestShflUp<int>();
+    runTestShflUp<float>();
+    runTestShflUp<long>();
+    runTestShflUp<long long>();
+
+    runTestShflDown<int>();
+    runTestShflDown<float>();
+    runTestShflDown<long>();
+    runTestShflDown<long long>();
+    passed();
+}