base: Rename unit test cc files to be *.test.cc.

This makes the name easier to read, looks ok if the file is named with
underscores between words or not, is easy to grep for, and shouldn't
introduce any ambiguities in the file names.

Change-Id: I34b7bcccea2d87c10c0de417dd5e3ef27c4b5666
Reviewed-on: https://gem5-review.googlesource.com/c/14676
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 286 insertions, 0 deletions

diff --git a/src/base/bitunion.test.cc b/src/base/bitunion.test.cc
new file mode 100644
index 000000000..d7ed95bb8
--- /dev/null
+++ b/src/base/bitunion.test.cc
@@ -0,0 +1,286 @@
+/*
+ * Copyright 2014 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain 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,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include <gtest/gtest.h>
+
+#include <cassert>
+#include <iostream>
+#include <type_traits>
+
+#include "base/bitunion.hh"
+#include "base/cprintf.hh"
+
+using namespace std;
+
+namespace {
+
+BitUnion64(SixtyFour)
+    Bitfield<39, 32> byte5;
+    Bitfield<2> bit2;
+    BitfieldRO<39, 32> byte5RO;
+    BitfieldWO<39, 32> byte5WO;
+    SubBitUnion(byte6, 47, 40)
+        Bitfield<43, 42> bits43To42;
+        Bitfield<41> bit41;
+        SignedBitfield<41> bit41Signed;
+    EndSubBitUnion(byte6)
+    SignedBitfield<47, 40> byte6Signed;
+    SignedBitfieldRO<47, 40> byte6SignedRO;
+    SignedBitfieldWO<47, 40> byte6SignedWO;
+EndBitUnion(SixtyFour)
+
+BitUnion64(EmptySixtyFour)
+EndBitUnion(EmptySixtyFour)
+
+BitUnion32(EmptyThirtyTwo)
+EndBitUnion(EmptyThirtyTwo)
+
+BitUnion16(EmptySixteen)
+EndBitUnion(EmptySixteen)
+
+BitUnion8(EmptyEight)
+EndBitUnion(EmptyEight)
+
+class SplitField
+{
+  protected:
+    BitUnion64(In)
+        Bitfield<15, 12> high;
+        Bitfield<7, 4> low;
+    EndBitUnion(In)
+
+    BitUnion64(Out)
+        Bitfield<7, 4> high;
+        Bitfield<3, 0> low;
+    EndBitUnion(Out)
+  public:
+    uint64_t
+    getter(const uint64_t &storage) const
+    {
+        Out out = 0;
+        In in = storage;
+        out.high = in.high;
+        out.low = in.low;
+        return out;
+    }
+
+    void
+    setter(uint64_t &storage, uint64_t val)
+    {
+        Out out = val;
+        In in = 0;
+        in.high = out.high;
+        in.low = out.low;
+        storage = in;
+    }
+};
+
+BitUnion64(Split)
+    BitfieldType<SplitField> split;
+EndBitUnion(Split)
+
+struct ContainingStruct
+{
+    BitUnion64(Contained)
+        Bitfield<63, 60> topNibble;
+    EndBitUnion(Contained)
+
+    Contained contained;
+};
+
+uint64_t
+containingFunc(uint64_t init_val, uint64_t fieldVal)
+{
+    BitUnion32(Contained)
+        Bitfield<16, 15> field;
+    EndBitUnion(Contained)
+
+    Contained contained = init_val;
+    contained.field = fieldVal;
+    return contained;
+}
+
+} // anonymous namespace
+
+// Declare these as global so g++ doesn't ignore them. Initialize them in
+// various ways.
+EmptySixtyFour emptySixtyFour = 0;
+EmptyThirtyTwo emptyThirtyTwo;
+EmptySixteen emptySixteen;
+EmptyEight emptyEight(0);
+
+class BitUnionData : public testing::Test {
+  protected:
+    SixtyFour sixtyFour;
+    Split split;
+
+    void SetUp() override { sixtyFour = 0; split = 0; }
+
+    template <typename T>
+    uint64_t templatedFunction(T) { return 0; }
+
+    template <typename T>
+    uint64_t
+    templatedFunction(BitUnionType<T> u)
+    {
+        BitUnionBaseType<T> b = u;
+        return b;
+    }
+};
+
+TEST_F(BitUnionData, NormalBitfield)
+{
+    EXPECT_EQ(sixtyFour.byte5, 0);
+    sixtyFour.byte5 = 0xff;
+    EXPECT_EQ(sixtyFour, 0xff00000000);
+    sixtyFour.byte5 = 0xfff;
+    EXPECT_EQ(sixtyFour, 0xff00000000);
+    EXPECT_EQ(sixtyFour.byte5, 0xff);
+}
+
+TEST_F(BitUnionData, SingleBitfield)
+{
+    EXPECT_EQ(sixtyFour.bit2, 0);
+    sixtyFour.bit2 = 0x1;
+    EXPECT_EQ(sixtyFour, 0x4);
+    EXPECT_EQ(sixtyFour.bit2, 0x1);
+}
+
+TEST_F(BitUnionData, ReadOnlyBitfield)
+{
+    EXPECT_EQ(sixtyFour.byte5RO, 0);
+    sixtyFour.byte5 = 0xff;
+    EXPECT_EQ(sixtyFour.byte5RO, 0xff);
+}
+
+TEST_F(BitUnionData, WriteOnlyBitfield)
+{
+    sixtyFour.byte5WO = 0xff;
+    EXPECT_EQ(sixtyFour, 0xff00000000);
+}
+
+TEST_F(BitUnionData, SubBitUnions)
+{
+    EXPECT_EQ(sixtyFour.byte6.bit41, 0);
+    sixtyFour.byte6 = 0x2;
+    EXPECT_EQ(sixtyFour.byte6.bit41, 1);
+    sixtyFour.byte6.bits43To42 = 0x3;
+    EXPECT_EQ(sixtyFour.byte6, 0xe);
+    sixtyFour.byte6 = 0xff;
+    sixtyFour.byte6.bit41 = 0;
+    EXPECT_EQ(sixtyFour, 0xfd0000000000);
+}
+
+TEST_F(BitUnionData, SignedBitfields)
+{
+    sixtyFour.byte6 = 0xff;
+    EXPECT_EQ(sixtyFour.byte6Signed, -1);
+    EXPECT_EQ(sixtyFour.byte6SignedRO, -1);
+    sixtyFour.byte6SignedWO = 0;
+    EXPECT_EQ(sixtyFour.byte6Signed, 0);
+    EXPECT_EQ(sixtyFour.byte6SignedRO, 0);
+    EXPECT_EQ(sixtyFour.byte6, 0);
+}
+
+TEST_F(BitUnionData, InsideStruct)
+{
+    ContainingStruct containing;
+    containing.contained = 0;
+    containing.contained.topNibble = 0xd;
+    EXPECT_EQ(containing.contained, 0xd000000000000000);
+}
+
+TEST_F(BitUnionData, InsideFunction)
+{
+    EXPECT_EQ(containingFunc(0xfffff, 0), 0xe7fff);
+}
+
+TEST_F(BitUnionData, BitfieldToBitfieldAssignment)
+{
+    SixtyFour otherSixtyFour = 0;
+    sixtyFour.bit2 = 1;
+    otherSixtyFour.byte6.bit41 = sixtyFour.bit2;
+    EXPECT_EQ(otherSixtyFour, 0x20000000000);
+    otherSixtyFour.bit2 = sixtyFour.bit2;
+    EXPECT_EQ(otherSixtyFour, 0x20000000004);
+}
+
+TEST_F(BitUnionData, Operators)
+{
+    SixtyFour otherSixtyFour = 0x4;
+    sixtyFour = otherSixtyFour;
+    EXPECT_EQ(sixtyFour, 0x4);
+    sixtyFour = 0;
+    EXPECT_TRUE(sixtyFour < otherSixtyFour);
+    EXPECT_TRUE(otherSixtyFour > sixtyFour);
+    EXPECT_TRUE(sixtyFour != otherSixtyFour);
+    sixtyFour = otherSixtyFour;
+    EXPECT_TRUE(sixtyFour == otherSixtyFour);
+}
+
+TEST_F(BitUnionData, Custom)
+{
+    EXPECT_EQ(split, 0);
+    split.split = 0xfff;
+    EXPECT_EQ(split, 0xf0f0);
+    EXPECT_EQ((uint64_t)split.split, 0xff);
+}
+
+TEST_F(BitUnionData, Templating)
+{
+    sixtyFour = 0xff;
+    EXPECT_EQ(templatedFunction(sixtyFour), 0xff);
+    EXPECT_EQ(templatedFunction((uint64_t)sixtyFour), 0);
+
+    BitUnion(uint64_t, Dummy64)
+    EndBitUnion(Dummy64);
+
+    BitUnion(uint32_t, Dummy32)
+    EndBitUnion(Dummy32);
+
+    bool is64;
+    is64 = std::is_same<BitUnionBaseType<Dummy64>, uint64_t>::value;
+    EXPECT_TRUE(is64);
+    is64 = std::is_same<BitUnionBaseType<Dummy32>, uint64_t>::value;
+    EXPECT_FALSE(is64);
+}
+
+TEST_F(BitUnionData, Output)
+{
+    sixtyFour = 1234567812345678;
+    std::stringstream ss;
+    ss << sixtyFour;
+    EXPECT_EQ(ss.str(), "1234567812345678");
+    ss.str("");
+
+    EmptyEight eight = 65;
+    ss << eight;
+    EXPECT_EQ(ss.str(), "65");
+    ss.str("");
+}