/*
 * Copyright (c) 2020 The Regents of the University of California
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 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <gtest/gtest.h>

#include <string>
#include <array>

#include "base/amo.hh"

using namespace gem5;

void
multiply2Op(int *b, int a)
{
    *b *= a;
}

void
multiply3Op(int *b, int a, int c)
{
    *b *= a * c;
}

void
addSubColumns(int *b, const std::array<int, 2>& a, const std::array<int, 2>& c)
{
    *b += a[0] + c[0];
    *b -= a[1] + c[1];
}

TEST(AmoTest, AtomicOpMin)
{
    // test with ints and strings
    int test_int_smaller = 5;
    int test_int_bigger = 15;
    std::string test_string_smaller = "apple";
    std::string test_string_bigger = "cat";

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpMin<int>(10);
    TypedAtomicOpFunctor<std::string> *amo_op_string =
        new AtomicOpMin<std::string>("base");
    amo_op_int->execute(&test_int_smaller);
    amo_op_int->execute(&test_int_bigger);
    amo_op_string->execute(&test_string_smaller);
    amo_op_string->execute(&test_string_bigger);

    EXPECT_EQ(test_int_smaller, 5);
    EXPECT_EQ(test_int_bigger, 10);
    EXPECT_EQ(test_string_smaller, "apple");
    EXPECT_EQ(test_string_bigger, "base");
}

TEST(AmoTest, AtomicOpMax)
{
    int test_int_smaller = 5;
    int test_int_bigger = 15;
    std::string test_string_smaller = "apple";
    std::string test_string_bigger = "cat";

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpMax<int>(10);
    TypedAtomicOpFunctor<std::string> *amo_op_string =
        new AtomicOpMax<std::string>("base");
    amo_op_int->execute(&test_int_smaller);
    amo_op_int->execute(&test_int_bigger);
    amo_op_string->execute(&test_string_smaller);
    amo_op_string->execute(&test_string_bigger);

    EXPECT_EQ(test_int_smaller, 10);
    EXPECT_EQ(test_int_bigger, 15);
    EXPECT_EQ(test_string_smaller, "base");
    EXPECT_EQ(test_string_bigger, "cat");
}

TEST(AmoTest, AtomicOpDec)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpDec<int>();
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpDec<char>();
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 9);
    EXPECT_EQ(test_char, 'b');
}

TEST(AmoTest, AtomicOpInc)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpInc<int>();
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpInc<char>();
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 11);
    EXPECT_EQ(test_char, 'd');
}

TEST(AmoTest, AtomicOpSub)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpSub<int>(2);
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpSub<char>('a');
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 8);
    EXPECT_EQ(test_char, 2);
}

TEST(AmoTest, AtomicOpAdd)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpAdd<int>(2);
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpAdd<char>(2);
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 12);
    EXPECT_EQ(test_char, 'e');
}

TEST(AmoTest, AtomicOpExch)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpExch<int>(2);
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpExch<char>('a');
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 2);
    EXPECT_EQ(test_char, 'a');
}

TEST(AmoTest, AtomicOpXor)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpXor<int>(2);
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpXor<char>('a');
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 8); // 1010 ^ 0010 = 1000
    EXPECT_EQ(test_char, 2); // 99 ^ 97 = 2
}

TEST(AmoTest, AtomicOpOr)
{
    int test_int = 8;
    bool test_bool = true;

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpOr<int>(2);
    TypedAtomicOpFunctor<bool> *amo_op_bool = new AtomicOpOr<bool>(false);
    amo_op_int->execute(&test_int);
    amo_op_bool->execute(&test_bool);

    EXPECT_EQ(test_int, 10);
    EXPECT_EQ(test_bool, true);
}

TEST(AmoTest, AtomicOpAnd)
{
    int test_int = 10;
    char test_char = 'c';

    TypedAtomicOpFunctor<int> *amo_op_int = new AtomicOpAnd<int>(6);
    TypedAtomicOpFunctor<char> *amo_op_char = new AtomicOpAnd<char>('a');
    amo_op_int->execute(&test_int);
    amo_op_char->execute(&test_char);

    EXPECT_EQ(test_int, 2);
    EXPECT_EQ(test_char, 'a');
}

TEST(AmoTest, AtomicGeneric2Op)
{
    int test_int = 9;

    TypedAtomicOpFunctor<int> *amo_op_int =
        new AtomicGeneric2Op<int>(9, multiply2Op);
    amo_op_int->execute(&test_int);

    EXPECT_EQ(test_int, 81);
}

TEST(AmoTest, AtomicGeneric3Op)
{
    int test_int = 2;

    TypedAtomicOpFunctor<int> *amo_op_int =
        new AtomicGeneric3Op<int>(4, 3, multiply3Op);
    amo_op_int->execute(&test_int);

    EXPECT_EQ(test_int, 24);
}

TEST(AmoTest, AtomicGenericPair3Op)
{
    int test_int = 5;

    std::array<int, 2> a = {6, 3};
    std::array<int, 2> c = {10, 8};
    TypedAtomicOpFunctor<int> *amo_op_int =
         new AtomicGenericPair3Op<int>(a, c, addSubColumns);
    amo_op_int->execute(&test_int);

    EXPECT_EQ(test_int, 10);
}