added fast math intrinsics to HIP

1. Added fast math intrinsics for single precision data types
2. Added test to check the intrinsics
3. Added HIP_PRECISE_MATH macro to enable precise math on fast math

Change-Id: Iadacbb6182c31252c5e3252854372d1b80dfd27b


[ROCm/hip commit: f843928ddd]

projects/hip/tests/src/deviceLib/hipFloatMath.cpp

@@ -0,0 +1,61 @@
+/*
+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.
+*/
+
+/* HIT_START
+ * BUILD: %t %s
+ * RUN: %t
+ * HIT_END
+ */
+
+#include "test_common.h"
+
+#define LEN 512
+#define SIZE LEN<<2
+
+
+
+__global__ void floatMath(hipLaunchParm lp, float *In, float *Out) {
+  int tid = hipThreadIdx_x + hipBlockIdx_x * hipBlockDim_x;
+  Out[tid] = __cosf(In[tid]);
+  Out[tid] = __exp10f(Out[tid]);
+  Out[tid] = __expf(Out[tid]);
+  Out[tid] = __frsqrt_rn(Out[tid]);
+  Out[tid] = __fsqrt_rd(Out[tid]);
+  Out[tid] = __fsqrt_rn(Out[tid]);
+  Out[tid] = __fsqrt_ru(Out[tid]);
+  Out[tid] = __fsqrt_rz(Out[tid]);
+  Out[tid] = __log10f(Out[tid]);
+  Out[tid] = __log2f(Out[tid]);
+  Out[tid] = __logf(Out[tid]);
+  Out[tid] = __powf(2.0f, Out[tid]);
+  __sincosf(Out[tid], &In[tid], &Out[tid]);
+  Out[tid] = __sinf(Out[tid]);
+  Out[tid] = __cosf(Out[tid]);
+  Out[tid] = __tanf(Out[tid]);
+}
+
+int main(){
+  float *Inh, *Outh, *Ind, *Outd;
+  hipMalloc((void**)&Ind, SIZE);
+  hipMalloc((void**)&Outd, SIZE);
+  hipLaunchKernel(floatMath, dim3(LEN,1,1), dim3(1,1,1), 0, 0, Ind, Outd);
+}