fix cuda half math function is undefined: hpow, htanh (apache#6225)

trevor-m · Aug 10, 2020 · ed04cdd · ed04cdd
1 parent b29f79e
commit ed04cdd
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/src/target/source/literal/cuda_half_t.h b/src/target/source/literal/cuda_half_t.h
@@ -293,6 +293,19 @@ __pack_half2(const half x, const half y) {
   unsigned v1 = *((unsigned short *)&y);
   return (v1 << 16) | v0;
 }
+
+static inline __device__ __host__ half hpow(half x, half y) {
+  float tmp_x = __half2float(x);
+  float tmp_y = __half2float(y);
+  float result = powf(tmp_x, tmp_y);
+  return __float2half(result);
+}
+
+static inline __device__ __host__ half htanh(half x) {
+  float tmp_x = __half2float(x);
+  float result = tanhf(tmp_x);
+  return __float2half(result);
+}
 )";
 
 static constexpr const char* _cuda_warp_intrinsic_util = R"(