hash-util-ir.cc

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// Copyright 2012 Cloudera Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "util/hash-util.h"

// Define the hashing functions for llvm.  They are not used by anything that is
// cross compiled and without this, would get stripped by the clang optimizer.
#ifdef IR_COMPILE
using namespace impala;

extern "C"
uint32_t IrFnvHash(const void* data, int32_t bytes, uint32_t hash) {
  return HashUtil::FnvHash64to32(data, bytes, hash);
}

extern "C"
uint32_t IrMurmurHash(const void* data, int32_t bytes, uint32_t hash) {
  return HashUtil::MurmurHash2_64(data, bytes, hash);
}

extern "C"
uint32_t IrCrcHash(const void* data, int32_t bytes, uint32_t hash) {
#ifdef __SSE4_2__
  return HashUtil::CrcHash(data, bytes, hash);
#else
  return HashUtil::FnvHash64to32(data, bytes, hash);
#endif
}
#else
#error "This file should only be compiled by clang."
#endif