1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#include "../../../lib/AST/ByteCode/BitcastBuffer.h"
#include "clang/AST/ASTContext.h"
#include "gtest/gtest.h"
#include <bitset>
#include <cassert>
#include <cmath>
#include <memory>
#include <string>
using namespace clang;
using namespace clang::interp;
TEST(BitcastBuffer, PushData) {
BitcastBuffer Buff1(Bytes(sizeof(int)).toBits());
const unsigned V = 0xCAFEBABE;
Bits VSize = Bytes(sizeof(V)).toBits();
std::byte Data[sizeof(V)];
std::memcpy(Data, &V, sizeof(V));
Endian HostEndianness =
llvm::sys::IsLittleEndianHost ? Endian::Little : Endian::Big;
Buff1.pushData(Data, Bits::zero(), VSize, HostEndianness);
// The buffer is in host-endianness.
if (llvm::sys::IsLittleEndianHost) {
ASSERT_EQ(Buff1.Data[0], std::byte{0xbe});
ASSERT_EQ(Buff1.Data[1], std::byte{0xba});
ASSERT_EQ(Buff1.Data[2], std::byte{0xfe});
ASSERT_EQ(Buff1.Data[3], std::byte{0xca});
} else {
ASSERT_EQ(Buff1.Data[0], std::byte{0xca});
ASSERT_EQ(Buff1.Data[1], std::byte{0xfe});
ASSERT_EQ(Buff1.Data[2], std::byte{0xba});
ASSERT_EQ(Buff1.Data[3], std::byte{0xbe});
}
{
unsigned V2;
auto D = Buff1.copyBits(Bits::zero(), VSize, VSize, Endian::Little);
std::memcpy(&V2, D.get(), sizeof(V));
ASSERT_EQ(V, V2);
D = Buff1.copyBits(Bits::zero(), VSize, VSize, Endian::Big);
std::memcpy(&V2, D.get(), sizeof(V));
ASSERT_EQ(V, V2);
}
BitcastBuffer Buff2(Bytes(sizeof(int)).toBits());
{
short s1 = (short)0xCAFE;
short s2 = (short)0xBABE;
std::byte sdata[2];
std::memcpy(sdata, &s1, sizeof(s1));
Buff2.pushData(sdata, Bits::zero(), Bits(sizeof(s1) * 8), HostEndianness);
std::memcpy(sdata, &s2, sizeof(s2));
Buff2.pushData(sdata, Bits(sizeof(s1) * 8), Bits(sizeof(s2) * 8),
HostEndianness);
}
if (llvm::sys::IsLittleEndianHost) {
ASSERT_EQ(Buff2.Data[0], std::byte{0xfe});
ASSERT_EQ(Buff2.Data[1], std::byte{0xca});
ASSERT_EQ(Buff2.Data[2], std::byte{0xbe});
ASSERT_EQ(Buff2.Data[3], std::byte{0xba});
} else {
ASSERT_EQ(Buff2.Data[0], std::byte{0xba});
ASSERT_EQ(Buff2.Data[1], std::byte{0xbe});
ASSERT_EQ(Buff2.Data[2], std::byte{0xca});
ASSERT_EQ(Buff2.Data[3], std::byte{0xfe});
}
{
unsigned V;
auto D = Buff2.copyBits(Bits::zero(), Bits(sizeof(V) * 8),
Bits(sizeof(V) * 8), Endian::Little);
std::memcpy(&V, D.get(), sizeof(V));
ASSERT_EQ(V, 0xBABECAFE);
D = Buff2.copyBits(Bits::zero(), Bits(sizeof(V) * 8), Bits(sizeof(V) * 8),
Endian::Big);
std::memcpy(&V, D.get(), sizeof(V));
ASSERT_EQ(V, 0xBABECAFE);
}
}
|
