mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
c8b18df9a7
* Add support for specifying the alignment to use. * Add the concept of native endianness. Used for unaligned native types. The native alignment and read/write simplification is based on a patch by Richard Smith. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171406 91177308-0d34-0410-b5e6-96231b3b80d8
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
//===- unittests/Support/EndianTest.cpp - Endian.h tests ------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/Endian.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "gtest/gtest.h"
|
|
#include <cstdlib>
|
|
#include <ctime>
|
|
using namespace llvm;
|
|
using namespace support;
|
|
|
|
#undef max
|
|
|
|
namespace {
|
|
|
|
TEST(Endian, Read) {
|
|
// These are 5 bytes so we can be sure at least one of the reads is unaligned.
|
|
unsigned char bigval[] = {0x00, 0x01, 0x02, 0x03, 0x04};
|
|
unsigned char littleval[] = {0x00, 0x04, 0x03, 0x02, 0x01};
|
|
int32_t BigAsHost = 0x00010203;
|
|
EXPECT_EQ(BigAsHost, (endian::read<int32_t, big, unaligned>(bigval)));
|
|
int32_t LittleAsHost = 0x02030400;
|
|
EXPECT_EQ(LittleAsHost,(endian::read<int32_t, little, unaligned>(littleval)));
|
|
|
|
EXPECT_EQ((endian::read<int32_t, big, unaligned>(bigval + 1)),
|
|
(endian::read<int32_t, little, unaligned>(littleval + 1)));
|
|
}
|
|
|
|
TEST(Endian, Write) {
|
|
unsigned char data[5];
|
|
endian::write<int32_t, big, unaligned>(data, -1362446643);
|
|
EXPECT_EQ(data[0], 0xAE);
|
|
EXPECT_EQ(data[1], 0xCA);
|
|
EXPECT_EQ(data[2], 0xB6);
|
|
EXPECT_EQ(data[3], 0xCD);
|
|
endian::write<int32_t, big, unaligned>(data + 1, -1362446643);
|
|
EXPECT_EQ(data[1], 0xAE);
|
|
EXPECT_EQ(data[2], 0xCA);
|
|
EXPECT_EQ(data[3], 0xB6);
|
|
EXPECT_EQ(data[4], 0xCD);
|
|
|
|
endian::write<int32_t, little, unaligned>(data, -1362446643);
|
|
EXPECT_EQ(data[0], 0xCD);
|
|
EXPECT_EQ(data[1], 0xB6);
|
|
EXPECT_EQ(data[2], 0xCA);
|
|
EXPECT_EQ(data[3], 0xAE);
|
|
endian::write<int32_t, little, unaligned>(data + 1, -1362446643);
|
|
EXPECT_EQ(data[1], 0xCD);
|
|
EXPECT_EQ(data[2], 0xB6);
|
|
EXPECT_EQ(data[3], 0xCA);
|
|
EXPECT_EQ(data[4], 0xAE);
|
|
}
|
|
|
|
TEST(Endian, PackedEndianSpecificIntegral) {
|
|
// These are 5 bytes so we can be sure at least one of the reads is unaligned.
|
|
unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04};
|
|
unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01};
|
|
big32_t *big_val =
|
|
reinterpret_cast<big32_t *>(big + 1);
|
|
little32_t *little_val =
|
|
reinterpret_cast<little32_t *>(little + 1);
|
|
|
|
EXPECT_EQ(*big_val, *little_val);
|
|
}
|
|
|
|
} // end anon namespace
|