cxx11_tensor_intdiv.cpp File Reference

#include "main.h"
#include <Eigen/CXX11/Tensor>

Functions
void	test_signed_32bit ()
void	test_unsigned_32bit ()
void	test_signed_64bit ()
void	test_unsigned_64bit ()
void	test_powers_32bit ()
void	test_powers_64bit ()
void	test_specific ()
	EIGEN_DECLARE_TEST (cxx11_tensor_intdiv)

Function Documentation

EIGEN_DECLARE_TEST()

EIGEN_DECLARE_TEST

(

cxx11_tensor_intdiv

)

                                        {
  CALL_SUBTEST_1(test_signed_32bit());
  CALL_SUBTEST_2(test_unsigned_32bit());
  CALL_SUBTEST_3(test_signed_64bit());
  CALL_SUBTEST_4(test_unsigned_64bit());
  CALL_SUBTEST_5(test_powers_32bit());
  CALL_SUBTEST_6(test_powers_64bit());
  CALL_SUBTEST_7(test_specific());
}

References CALL_SUBTEST_1, CALL_SUBTEST_2, CALL_SUBTEST_3, CALL_SUBTEST_4, CALL_SUBTEST_5, CALL_SUBTEST_6, CALL_SUBTEST_7, test_powers_32bit(), test_powers_64bit(), test_signed_32bit(), test_signed_64bit(), test_specific(), test_unsigned_32bit(), and test_unsigned_64bit().

test_powers_32bit()

void test_powers_32bit

(

)

                         {
  for (int expon = 1; expon < 31; expon++) {
    int32_t div = (1 << expon);
    for (int num_expon = 0; num_expon < 32; num_expon++) {
      int32_t start_num = (1 << num_expon) - 100;
      int32_t end_num = (1 << num_expon) + 100;
      if (start_num < 0) start_num = 0;
      for (int32_t num = start_num; num < end_num; num++) {
        Eigen::internal::TensorIntDivisor<int32_t> divider = Eigen::internal::TensorIntDivisor<int32_t>(div);
        int32_t result = num / div;
        int32_t result_op = divider.divide(num);
        VERIFY_IS_EQUAL(result_op, result);
      }
    }
  }
}

References Eigen::internal::TensorIntDivisor< T, div_gt_one >::divide(), and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_powers_64bit()

void test_powers_64bit

(

)

                         {
  for (int expon = 0; expon < 63; expon++) {
    int64_t div = (1ull << expon);
    for (int num_expon = 0; num_expon < 63; num_expon++) {
      int64_t start_num = (1ull << num_expon) - 10;
      int64_t end_num = (1ull << num_expon) + 10;
      if (start_num < 0) start_num = 0;
      for (int64_t num = start_num; num < end_num; num++) {
        Eigen::internal::TensorIntDivisor<int64_t> divider(div);
        int64_t result = num / div;
        int64_t result_op = divider.divide(num);
        VERIFY_IS_EQUAL(result_op, result);
      }
    }
  }
}

References Eigen::internal::TensorIntDivisor< T, div_gt_one >::divide(), and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_signed_32bit()

void test_signed_32bit

(

)

                         {
  // Divide by one
  const Eigen::internal::TensorIntDivisor<int32_t, false> div_by_one(1);
 
  for (int32_t j = 0; j < 25000; ++j) {
    const int32_t fast_div = j / div_by_one;
    const int32_t slow_div = j / 1;
    VERIFY_IS_EQUAL(fast_div, slow_div);
  }
 
  // Standard divide by 2 or more
  for (int32_t i = 2; i < 25000; ++i) {
    const Eigen::internal::TensorIntDivisor<int32_t, false> div(i);
 
    for (int32_t j = 0; j < 25000; ++j) {
      const int32_t fast_div = j / div;
      const int32_t slow_div = j / i;
      VERIFY_IS_EQUAL(fast_div, slow_div);
    }
  }
 
  // Optimized divide by 2 or more
  for (int32_t i = 2; i < 25000; ++i) {
    const Eigen::internal::TensorIntDivisor<int32_t, true> div(i);
 
    for (int32_t j = 0; j < 25000; ++j) {
      const int32_t fast_div = j / div;
      const int32_t slow_div = j / i;
      VERIFY_IS_EQUAL(fast_div, slow_div);
    }
  }
}

References i, j, and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_signed_64bit()

void test_signed_64bit

(

)

                         {
  for (int64_t i = 1; i < 25000; ++i) {
    const Eigen::internal::TensorIntDivisor<int64_t> div(i);
 
    for (int64_t j = 0; j < 25000; ++j) {
      const int64_t fast_div = j / div;
      const int64_t slow_div = j / i;
      VERIFY_IS_EQUAL(fast_div, slow_div);
    }
  }
}

References i, j, and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_specific()

void test_specific

(

)

                     {
  // A particular combination that was previously failing
  int64_t div = 209715200;
  int64_t num = 3238002688ll;
  Eigen::internal::TensorIntDivisor<int64_t> divider(div);
  int64_t result = num / div;
  int64_t result_op = divider.divide(num);
  VERIFY_IS_EQUAL(result, result_op);
}

References Eigen::internal::TensorIntDivisor< T, div_gt_one >::divide(), and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_unsigned_32bit()

void test_unsigned_32bit

(

)

                           {
  for (uint32_t i = 1; i < 25000; ++i) {
    const Eigen::internal::TensorIntDivisor<uint32_t> div(i);
 
    for (uint32_t j = 0; j < 25000; ++j) {
      const uint32_t fast_div = j / div;
      const uint32_t slow_div = j / i;
      VERIFY_IS_EQUAL(fast_div, slow_div);
    }
  }
}

References i, j, and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().

test_unsigned_64bit()

void test_unsigned_64bit

(

)

                           {
  for (uint64_t i = 1; i < 25000; ++i) {
    const Eigen::internal::TensorIntDivisor<uint64_t> div(i);
 
    for (uint64_t j = 0; j < 25000; ++j) {
      const uint64_t fast_div = j / div;
      const uint64_t slow_div = j / i;
      VERIFY_IS_EQUAL(fast_div, slow_div);
    }
  }
}

References i, j, and VERIFY_IS_EQUAL.

Referenced by EIGEN_DECLARE_TEST().