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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
//===--- Floating.h - Types for the constexpr VM ----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Defines the VM types and helpers operating on types.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_INTERP_FLOATING_H
#define LLVM_CLANG_AST_INTERP_FLOATING_H
#include "Primitives.h"
#include "clang/AST/APValue.h"
#include "llvm/ADT/APFloat.h"
namespace clang {
namespace interp {
using APFloat = llvm::APFloat;
using APSInt = llvm::APSInt;
class Floating final {
private:
// The underlying value storage.
APFloat F;
public:
/// Zero-initializes a Floating.
Floating() : F(0.0f) {}
Floating(const APFloat &F) : F(F) {}
// Static constructors for special floating point values.
static Floating getInf(const llvm::fltSemantics &Sem) {
return Floating(APFloat::getInf(Sem));
}
const APFloat &getAPFloat() const { return F; }
bool operator<(Floating RHS) const { return F < RHS.F; }
bool operator>(Floating RHS) const { return F > RHS.F; }
bool operator<=(Floating RHS) const { return F <= RHS.F; }
bool operator>=(Floating RHS) const { return F >= RHS.F; }
bool operator==(Floating RHS) const { return F == RHS.F; }
bool operator!=(Floating RHS) const { return F != RHS.F; }
Floating operator-() const { return Floating(-F); }
APFloat::opStatus convertToInteger(APSInt &Result) const {
bool IsExact;
return F.convertToInteger(Result, llvm::APFloat::rmTowardZero, &IsExact);
}
Floating toSemantics(const llvm::fltSemantics *Sem,
llvm::RoundingMode RM) const {
APFloat Copy = F;
bool LosesInfo;
Copy.convert(*Sem, RM, &LosesInfo);
(void)LosesInfo;
return Floating(Copy);
}
/// Convert this Floating to one with the same semantics as \Other.
Floating toSemantics(const Floating &Other, llvm::RoundingMode RM) const {
return toSemantics(&Other.F.getSemantics(), RM);
}
APSInt toAPSInt(unsigned NumBits = 0) const {
return APSInt(F.bitcastToAPInt());
}
APValue toAPValue() const { return APValue(F); }
void print(llvm::raw_ostream &OS) const {
// Can't use APFloat::print() since it appends a newline.
SmallVector<char, 16> Buffer;
F.toString(Buffer);
OS << Buffer;
}
unsigned bitWidth() const { return F.semanticsSizeInBits(F.getSemantics()); }
bool isSigned() const { return true; }
bool isNegative() const { return F.isNegative(); }
bool isPositive() const { return !F.isNegative(); }
bool isZero() const { return F.isZero(); }
bool isNonZero() const { return F.isNonZero(); }
bool isMin() const { return F.isSmallest(); }
bool isMinusOne() const { return F.isExactlyValue(-1.0); }
bool isNan() const { return F.isNaN(); }
bool isFinite() const { return F.isFinite(); }
ComparisonCategoryResult compare(const Floating &RHS) const {
return Compare(F, RHS.F);
}
static APFloat::opStatus fromIntegral(APSInt Val,
const llvm::fltSemantics &Sem,
llvm::RoundingMode RM,
Floating &Result) {
APFloat F = APFloat(Sem);
APFloat::opStatus Status = F.convertFromAPInt(Val, Val.isSigned(), RM);
Result = Floating(F);
return Status;
}
// -------
static APFloat::opStatus add(const Floating &A, const Floating &B,
llvm::RoundingMode RM, Floating *R) {
*R = Floating(A.F);
return R->F.add(B.F, RM);
}
static APFloat::opStatus increment(const Floating &A, llvm::RoundingMode RM,
Floating *R) {
APFloat One(A.F.getSemantics(), 1);
*R = Floating(A.F);
return R->F.add(One, RM);
}
static APFloat::opStatus sub(const Floating &A, const Floating &B,
llvm::RoundingMode RM, Floating *R) {
*R = Floating(A.F);
return R->F.subtract(B.F, RM);
}
static APFloat::opStatus decrement(const Floating &A, llvm::RoundingMode RM,
Floating *R) {
APFloat One(A.F.getSemantics(), 1);
*R = Floating(A.F);
return R->F.subtract(One, RM);
}
static APFloat::opStatus mul(const Floating &A, const Floating &B,
llvm::RoundingMode RM, Floating *R) {
*R = Floating(A.F);
return R->F.multiply(B.F, RM);
}
static APFloat::opStatus div(const Floating &A, const Floating &B,
llvm::RoundingMode RM, Floating *R) {
*R = Floating(A.F);
return R->F.divide(B.F, RM);
}
static bool neg(const Floating &A, Floating *R) {
*R = -A;
return false;
}
};
llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, Floating F);
Floating getSwappedBytes(Floating F);
} // namespace interp
} // namespace clang
#endif
|
