piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-23 14:19:46 -06:00
Code Issues Packages Projects Releases Wiki Activity

FloatUtils: Remove IntDouble and IntFloat

Browse Source 
Type punning via unions in C++ invokes undefined behavior. Instead, leverage BitCast,
our variant of C++2a's std::bit_cast
This commit is contained in:
Lioncash
2018-05-10 10:35:00 -04:00
parent bde4e970f1
commit 0a3631cc76
3 changed files with 32 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
Source/UnitTests/Common/FloatUtilsTest.cpp
View File

@ -7,6 +7,7 @@
#include <gtest/gtest.h>
#include "Common/BitUtils.h"
#include "Common/FloatUtils.h"
TEST(FloatUtils, IsQNAN)
@ -51,18 +52,16 @@ TEST(FloatUtils, FlushToZero)
std::uniform_int_distribution<u32> dist(0x00800000u, 0x7fffffffu);
for (u32 i = 0; i <= 0x007fffffu; ++i)
{
Common::IntFloat x(i);
EXPECT_EQ(+0.f, Common::FlushToZero(x.f));
u32 i_tmp = i;
EXPECT_EQ(+0.f, Common::FlushToZero(Common::BitCast<float>(i_tmp)));
x.i = i | 0x80000000u;
EXPECT_EQ(-0.f, Common::FlushToZero(x.f));
i_tmp |= 0x80000000u;
EXPECT_EQ(-0.f, Common::FlushToZero(Common::BitCast<float>(i_tmp)));
x.i = dist(engine);
Common::IntFloat y(Common::FlushToZero(x.f));
EXPECT_EQ(x.i, y.i);
i_tmp = dist(engine);
EXPECT_EQ(i_tmp, Common::BitCast<u32>(Common::FlushToZero(Common::BitCast<float>(i_tmp))));
x.i |= 0x80000000u;
y.f = Common::FlushToZero(x.f);
EXPECT_EQ(x.i, y.i);
i_tmp |= 0x80000000u;
EXPECT_EQ(i_tmp, Common::BitCast<u32>(Common::FlushToZero(Common::BitCast<float>(i_tmp))));
}
}

13
Source/UnitTests/VideoCommon/VertexLoaderTest.cpp
View File

@ -10,8 +10,8 @@
#include <gtest/gtest.h> // NOLINT
#include "Common/BitUtils.h"
#include "Common/Common.h"
#include "Common/FloatUtils.h"
#include "VideoCommon/CPMemory.h"
#include "VideoCommon/DataReader.h"
#include "VideoCommon/OpcodeDecoding.h"
@ -72,14 +72,15 @@ protected:
m_src.Write<T, true>(val);
}
void ExpectOut(float val)
void ExpectOut(float expected)
{
// Read unswapped.
Common::IntFloat expected(val), actual(m_dst.Read<float, false>());
if (!actual.f || actual.f != actual.f)
EXPECT_EQ(expected.i, actual.i);
const float actual = m_dst.Read<float, false>();
if (!actual || actual != actual)
EXPECT_EQ(Common::BitCast<u32>(expected), Common::BitCast<u32>(actual));
else
EXPECT_EQ(expected.f, actual.f);
EXPECT_EQ(expected, actual);
}
void RunVertices(int count, int expected_count = -1)