added fp16 software support

Change-Id: Ic0fdd9f8248a66911169fc00d3af71f50b36e233

tests/src/hipTestHalf.cpp

@@ -0,0 +1,56 @@
+/*
+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 <stdio.h>
+#include <hip/hip_fp16.h>
+#include "hip_runtime_api.h"
+
+#define DSIZE 4
+#define SCF 0.5f
+#define nTPB 256
+__global__ void half_scale_kernel(hipLaunchParm lp, float *din, float *dout, int dsize){
+
+  int idx = hipThreadIdx_x+ hipBlockDim_x*hipBlockIdx_x;
+  if (idx < dsize){
+    __half scf = cvt_float_to_half(SCF);
+    __half kin = cvt_float_to_half(din[idx]);
+    __half kout;
+
+    kout = __hmul(kin, scf);
+
+//    kout = cvt_float_to_half(cvt_half_to_float(kin)*cvt_half_to_float(scf));
+
+    dout[idx] = cvt_half_to_float(kout);
+    }
+}
+
+int main(){
+
+  float *hin, *hout, *din, *dout;
+  hin  = (float *)malloc(DSIZE*sizeof(float));
+  hout = (float *)malloc(DSIZE*sizeof(float));
+  for (int i = 0; i < DSIZE; i++) hin[i] = i;
+  hipMalloc(&din,  DSIZE*sizeof(float));
+  hipMalloc(&dout, DSIZE*sizeof(float));
+  hipMemcpy(din, hin, DSIZE*sizeof(float), hipMemcpyHostToDevice);
+  hipLaunchKernel(half_scale_kernel, dim3((DSIZE+nTPB-1)/nTPB),dim3(nTPB), 0, 0, din, dout, DSIZE);
+  hipMemcpy(hout, dout, DSIZE*sizeof(float), hipMemcpyDeviceToHost);
+  for (int i = 0; i < DSIZE; i++) printf("%f\n", hout[i]);
+  return 0;
+}