text: /*
   *  Copyright (c) 2016 The WebM project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  #include <cmath>
  #include <cstdlib>
  #include <string>
  #include <tuple>
  
  #include "third_party/googletest/src/include/gtest/gtest.h"
  
  #include "./vpx_config.h"
  #include "./vpx_dsp_rtcd.h"
  #include "test/acm_random.h"
  #include "test/clear_system_state.h"
  #include "test/register_state_check.h"
  #include "test/util.h"
  #include "vpx_ports/mem.h"
  
  using libvpx_test::ACMRandom;
  
  namespace {
  const int kNumIterations = 10000;
  
  typedef uint64_t (*SSI16Func)(const int16_t *src, int stride, int size);
  typedef std::tuple<SSI16Func, SSI16Func> SumSquaresParam;
  
  class SumSquaresTest : public ::testing::TestWithParam<SumSquaresParam> {
   public:
    virtual ~SumSquaresTest() {}
    virtual void SetUp() {
      ref_func_ = GET_PARAM(0);
      tst_func_ = GET_PARAM(1);
    }
  
    virtual void TearDown() { libvpx_test::ClearSystemState(); }
  
   protected:
    SSI16Func ref_func_;
    SSI16Func tst_func_;
  };
  
  TEST_P(SumSquaresTest, OperationCheck) {
    ACMRandom rnd(ACMRandom::DeterministicSeed());
    DECLARE_ALIGNED(16, int16_t, src[256 * 256]);
    const int msb = 11;  // Up to 12 bit input
    const int limit = 1 << (msb + 1);
  
    for (int k = 0; k < kNumIterations; k++) {
      const int size = 4 << rnd(6);  // Up to 128x128
      int stride = 4 << rnd(7);      // Up to 256 stride
      while (stride < size) {        // Make sure it's valid
        stride = 4 << rnd(7);
      }
  
      for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
          src[i * stride + j] = rnd(2) ? rnd(limit) : -rnd(limit);
        }
      }
  
      const uint64_t res_ref = ref_func_(src, stride, size);
      uint64_t res_tst;
      ASM_REGISTER_STATE_CHECK(res_tst = tst_func_(src, stride, size));
  
      ASSERT_EQ(res_ref, res_tst) << "Error: Sum Squares Test"
                                  << " C output does not match optimized output.";
    }
  }
  
  TEST_P(SumSquaresTest, ExtremeValues) {
    ACMRandom rnd(ACMRandom::DeterministicSeed());
    DECLARE_ALIGNED(16, int16_t, src[256 * 256]);
    const int msb = 11;  // Up to 12 bit input
    const int limit = 1 << (msb + 1);
  
    for (int k = 0; k < kNumIterations; k++) {
      const int size = 4 << rnd(6);  // Up to 128x128
      int stride = 4 << rnd(7);      // Up to 256 stride
      while (stride < size) {        // Make sure it's valid
        stride = 4 << rnd(7);
      }
  
      const int val = rnd(2) ? limit - 1 : -(limit - 1);
      for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
          src[i * stride + j] = val;
        }
      }
  
      const uint64_t res_ref = ref_func_(src, stride, size);
      uint64_t res_tst;
      ASM_REGISTER_STATE_CHECK(res_tst = tst_func_(src, stride, size));
  
      ASSERT_EQ(res_ref, res_tst) << "Error: Sum Squares Test"
                                  << " C output does not match optimized output.";
    }
  }
  
  using std::make_tuple;
  
  #if HAVE_NEON
  INSTANTIATE_TEST_CASE_P(
      NEON, SumSquaresTest,
      ::testing::Values(make_tuple(&vpx_sum_squares_2d_i16_c,
                                   &vpx_sum_squares_2d_i16_neon)));
  #endif  // HAVE_NEON
  
  #if HAVE_SSE2
  INSTANTIATE_TEST_CASE_P(
      SSE2, SumSquaresTest,
      ::testing::Values(make_tuple(&vpx_sum_squares_2d_i16_c,
                                   &vpx_sum_squares_2d_i16_sse2)));
  #endif  // HAVE_SSE2
  
  #if HAVE_MSA
  INSTANTIATE_TEST_CASE_P(
      MSA, SumSquaresTest,
      ::testing::Values(make_tuple(&vpx_sum_squares_2d_i16_c,
                                   &vpx_sum_squares_2d_i16_msa)));
  #endif  // HAVE_MSA
  }  // namespace
  