Add __ldg

[ROCm/hip commit: 76f2670cef]

projects/hip/include/hcc_detail/hip_runtime.h

@@ -401,6 +401,13 @@ __device__ int __all(  int input);
 __device__ int __any( int input);
 __device__  unsigned long long int __ballot( int input);
 
+// __ldg function
+template <typename T>
+__device__ __forceinline__ T __ldg( const T * addr)
+{
+	return *addr;
+}
+
 // warp shuffle functions
 #ifdef __cplusplus
 

projects/hip/tests/src/CMakeLists.txt

@@ -145,6 +145,7 @@ make_hip_executable (hip_popc hip_popc.cpp)
 make_hip_executable (hip_clz hip_clz.cpp) 
 make_hip_executable (hip_brev hip_brev.cpp) 
 make_hip_executable (hip_ffs hip_ffs.cpp) 
+make_hip_executable (hip_ldg hip_ldg.cpp)
 make_hip_executable (hipGetDeviceAttribute hipGetDeviceAttribute.cpp) 
 make_hip_executable (hipEnvVar hipEnvVar.cpp) 
 make_hip_executable (hipEnvVarDriver hipEnvVarDriver.cpp) 
@@ -184,6 +185,7 @@ make_test(hip_popc " " )
 make_test(hip_brev " " )
 make_test(hip_clz " " )
 make_test(hip_ffs " " )
+make_test(hip_ldg " " )
 make_test(hipEventRecord --iterations 10)
 make_test(hipMemset " " )
 make_test(hipMemset --N 10    --memsetval 0x42 )  # small copy, just 10 bytes.

projects/hip/tests/src/hip_ldg.cpp

@@ -0,0 +1,150 @@
+/*
+Copyright (c) 2015-2016 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.
+*/
+#include <assert.h>
+#include <stdio.h>
+#include <algorithm>
+#include <stdlib.h>
+#include<iostream>
+#include "hip_runtime.h"
+
+
+#define HIP_ASSERT(x) (assert((x)==hipSuccess))
+
+
+#define WIDTH     1024
+#define HEIGHT    1024
+
+#define NUM       (WIDTH*HEIGHT)
+
+#define THREADS_PER_BLOCK_X  16
+#define THREADS_PER_BLOCK_Y  16
+#define THREADS_PER_BLOCK_Z  1
+
+__global__ void 
+vectoradd_float(hipLaunchParm lp,
+             float* a, const float*  bm, const float* cm, int width, int height) 
+
+  {
+      int x = hipBlockDim_x * hipBlockIdx_x + hipThreadIdx_x;
+      int y = hipBlockDim_y * hipBlockIdx_y + hipThreadIdx_y;
+
+      int i = y * width + x;
+      if ( i < (width * height)) {
+        a[i] = __ldg(&bm[i]) + __ldg(&cm[i]);
+      }
+
+
+
+  }
+
+#if 0
+__kernel__ void vectoradd_float(float* a, const float* b, const float* c, int width, int height) {
+
+  
+  int x = blockDimX * blockIdx.x + threadIdx.x;
+  int y = blockDimY * blockIdy.y + threadIdx.y;
+
+  int i = y * width + x;
+  if ( i < (width * height)) {
+    a[i] = b[i] + c[i];
+  }
+}
+#endif
+
+using namespace std;
+
+int main() {
+  
+  float* hostA;
+  float* hostB;
+  float* hostC;
+
+  float* deviceA;
+  float* deviceB;
+  float* deviceC;
+
+  hipDeviceProp_t devProp;
+  hipGetDeviceProperties(&devProp, 0);
+  cout << " System minor " << devProp.minor << endl;
+  cout << " System major " << devProp.major << endl;
+  cout << " agent prop name " << devProp.name << endl;
+
+
+
+  cout << "__ldg " << endl ;
+
+
+  int i;
+  int errors;
+
+  hostA = (float*)malloc(NUM * sizeof(float));
+  hostB = (float*)malloc(NUM * sizeof(float));
+  hostC = (float*)malloc(NUM * sizeof(float));
+  
+  // initialize the input data
+  for (i = 0; i < NUM; i++) {
+    hostB[i] = (float)i;
+    hostC[i] = (float)i*100.0f;
+  }
+  
+  HIP_ASSERT(hipMalloc((void**)&deviceA, NUM * sizeof(float)));
+  HIP_ASSERT(hipMalloc((void**)&deviceB, NUM * sizeof(float)));
+  HIP_ASSERT(hipMalloc((void**)&deviceC, NUM * sizeof(float)));
+  
+  HIP_ASSERT(hipMemcpy(deviceB, hostB, NUM*sizeof(float), hipMemcpyHostToDevice));
+  HIP_ASSERT(hipMemcpy(deviceC, hostC, NUM*sizeof(float), hipMemcpyHostToDevice));
+
+
+  hipLaunchKernel(vectoradd_float, 
+                  dim3(WIDTH/THREADS_PER_BLOCK_X, HEIGHT/THREADS_PER_BLOCK_Y),
+                  dim3(THREADS_PER_BLOCK_X, THREADS_PER_BLOCK_Y),
+                  0, 0,
+                  deviceA ,deviceB ,deviceC ,WIDTH ,HEIGHT);
+
+
+  HIP_ASSERT(hipMemcpy(hostA, deviceA, NUM*sizeof(float), hipMemcpyDeviceToHost));
+
+  // verify the results
+  errors = 0;
+  for (i = 0; i < NUM; i++) {
+    if (hostA[i] != (hostB[i] + hostC[i])) {
+      errors++;
+    }
+  }
+  if (errors!=0) {
+    printf("FAILED: %d errors\n",errors);
+  } else {
+      printf ("PASSED!\n");
+  }
+
+  HIP_ASSERT(hipFree(deviceA));
+  HIP_ASSERT(hipFree(deviceB));
+  HIP_ASSERT(hipFree(deviceC));
+
+  free(hostA);
+  free(hostB);
+  free(hostC);
+
+  //hipResetDefaultAccelerator();
+
+  return errors;
+}