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
|
//===-- PPCMCExpr.cpp - PPC specific MC expression classes ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "ppcmcexpr"
#include "PPCMCExpr.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCAsmInfo.h"
using namespace llvm;
const PPCMCExpr*
PPCMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
bool isDarwin, MCContext &Ctx) {
return new (Ctx) PPCMCExpr(Kind, Expr, isDarwin);
}
void PPCMCExpr::PrintImpl(raw_ostream &OS) const {
if (isDarwinSyntax()) {
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case VK_PPC_LO: OS << "lo16"; break;
case VK_PPC_HI: OS << "hi16"; break;
case VK_PPC_HA: OS << "ha16"; break;
}
OS << '(';
getSubExpr()->print(OS);
OS << ')';
} else {
getSubExpr()->print(OS);
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case VK_PPC_LO: OS << "@l"; break;
case VK_PPC_HI: OS << "@h"; break;
case VK_PPC_HA: OS << "@ha"; break;
case VK_PPC_HIGHER: OS << "@higher"; break;
case VK_PPC_HIGHERA: OS << "@highera"; break;
case VK_PPC_HIGHEST: OS << "@highest"; break;
case VK_PPC_HIGHESTA: OS << "@highesta"; break;
}
}
}
bool
PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const {
MCValue Value;
if (!Layout || !getSubExpr()->EvaluateAsRelocatable(Value, *Layout))
return false;
if (Value.isAbsolute()) {
int64_t Result = Value.getConstant();
switch (Kind) {
default:
llvm_unreachable("Invalid kind!");
case VK_PPC_LO:
Result = Result & 0xffff;
break;
case VK_PPC_HI:
Result = (Result >> 16) & 0xffff;
break;
case VK_PPC_HA:
Result = ((Result + 0x8000) >> 16) & 0xffff;
break;
case VK_PPC_HIGHER:
Result = (Result >> 32) & 0xffff;
break;
case VK_PPC_HIGHERA:
Result = ((Result + 0x8000) >> 32) & 0xffff;
break;
case VK_PPC_HIGHEST:
Result = (Result >> 48) & 0xffff;
break;
case VK_PPC_HIGHESTA:
Result = ((Result + 0x8000) >> 48) & 0xffff;
break;
}
Res = MCValue::get(Result);
} else {
MCContext &Context = Layout->getAssembler().getContext();
const MCSymbolRefExpr *Sym = Value.getSymA();
MCSymbolRefExpr::VariantKind Modifier = Sym->getKind();
if (Modifier != MCSymbolRefExpr::VK_None)
return false;
switch (Kind) {
default:
llvm_unreachable("Invalid kind!");
case VK_PPC_LO:
Modifier = MCSymbolRefExpr::VK_PPC_LO;
break;
case VK_PPC_HI:
Modifier = MCSymbolRefExpr::VK_PPC_HI;
break;
case VK_PPC_HA:
Modifier = MCSymbolRefExpr::VK_PPC_HA;
break;
case VK_PPC_HIGHERA:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHERA;
break;
case VK_PPC_HIGHER:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHER;
break;
case VK_PPC_HIGHEST:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHEST;
break;
case VK_PPC_HIGHESTA:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHESTA;
break;
}
Sym = MCSymbolRefExpr::Create(&Sym->getSymbol(), Modifier, Context);
Res = MCValue::get(Sym, Value.getSymB(), Value.getConstant());
}
return true;
}
// FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
// that method should be made public?
static void AddValueSymbols_(const MCExpr *Value, MCAssembler *Asm) {
switch (Value->getKind()) {
case MCExpr::Target:
llvm_unreachable("Can't handle nested target expr!");
case MCExpr::Constant:
break;
case MCExpr::Binary: {
const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
AddValueSymbols_(BE->getLHS(), Asm);
AddValueSymbols_(BE->getRHS(), Asm);
break;
}
case MCExpr::SymbolRef:
Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
break;
case MCExpr::Unary:
AddValueSymbols_(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
break;
}
}
void PPCMCExpr::AddValueSymbols(MCAssembler *Asm) const {
AddValueSymbols_(getSubExpr(), Asm);
}
|
