Adding float to string kernel

src/main/cpp/CMakeLists.txt

@@ -163,6 +163,7 @@ add_library(
   src/ZOrderJni.cpp
   src/bloom_filter.cu
   src/cast_decimal_to_string.cu
+  src/cast_float_to_string.cu
   src/cast_string.cu
   src/cast_string_to_float.cu
   src/datetime_rebase.cu

src/main/cpp/src/CastStringJni.cpp

@@ -109,6 +109,21 @@ JNIEXPORT jlong JNICALL Java_com_nvidia_spark_rapids_jni_CastStrings_toFloat(
   CATCH_CAST_EXCEPTION(env, 0);
 }
 
+JNIEXPORT jlong JNICALL Java_com_nvidia_spark_rapids_jni_CastStrings_fromFloat(
+  JNIEnv* env, jclass, jlong input_column, jint j_dtype)
+{
+  JNI_NULL_CHECK(env, input_column, "input column is null", 0);
+
+  try {
+    cudf::jni::auto_set_device(env);
+
+    cudf::column_view cv{*reinterpret_cast<cudf::column_view const*>(input_column)};
+    return cudf::jni::release_as_jlong(
+      spark_rapids_jni::float_to_string(cv, cudf::get_default_stream()));
+  }
+  CATCH_CAST_EXCEPTION(env, 0);
+}
+
 JNIEXPORT jlong JNICALL Java_com_nvidia_spark_rapids_jni_CastStrings_fromDecimal(JNIEnv* env,
                                                                                  jclass,
                                                                                  jlong input_column)