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
|
//===-- AArch64MCAsmInfo.cpp - AArch64 asm properties ---------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the AArch64MCAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "AArch64MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/TargetParser/Triple.h"
using namespace llvm;
enum AsmWriterVariantTy {
Default = -1,
Generic = 0,
Apple = 1
};
static cl::opt<AsmWriterVariantTy> AsmWriterVariant(
"aarch64-neon-syntax", cl::init(Default),
cl::desc("Choose style of NEON code to emit from AArch64 backend:"),
cl::values(clEnumValN(Generic, "generic", "Emit generic NEON assembly"),
clEnumValN(Apple, "apple", "Emit Apple-style NEON assembly")));
AArch64MCAsmInfoDarwin::AArch64MCAsmInfoDarwin(bool IsILP32) {
// We prefer NEON instructions to be printed in the short, Apple-specific
// form when targeting Darwin.
AssemblerDialect = AsmWriterVariant == Default ? Apple : AsmWriterVariant;
PrivateGlobalPrefix = "L";
PrivateLabelPrefix = "L";
SeparatorString = "%%";
CommentString = ";";
CalleeSaveStackSlotSize = 8;
CodePointerSize = IsILP32 ? 4 : 8;
AlignmentIsInBytes = false;
UsesELFSectionDirectiveForBSS = true;
SupportsDebugInformation = true;
UseDataRegionDirectives = true;
ExceptionsType = ExceptionHandling::DwarfCFI;
}
const MCExpr *AArch64MCAsmInfoDarwin::getExprForPersonalitySymbol(
const MCSymbol *Sym, unsigned Encoding, MCStreamer &Streamer) const {
// On Darwin, we can reference dwarf symbols with foo@GOT-., which
// is an indirect pc-relative reference. The default implementation
// won't reference using the GOT, so we need this target-specific
// version.
MCContext &Context = Streamer.getContext();
const MCExpr *Res =
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOT, Context);
MCSymbol *PCSym = Context.createTempSymbol();
Streamer.emitLabel(PCSym);
const MCExpr *PC = MCSymbolRefExpr::create(PCSym, Context);
return MCBinaryExpr::createSub(Res, PC, Context);
}
AArch64MCAsmInfoELF::AArch64MCAsmInfoELF(const Triple &T) {
if (T.getArch() == Triple::aarch64_be)
IsLittleEndian = false;
// We prefer NEON instructions to be printed in the generic form when
// targeting ELF.
AssemblerDialect = AsmWriterVariant == Default ? Generic : AsmWriterVariant;
CodePointerSize = T.getEnvironment() == Triple::GNUILP32 ? 4 : 8;
// ".comm align is in bytes but .align is pow-2."
AlignmentIsInBytes = false;
CommentString = "//";
PrivateGlobalPrefix = ".L";
PrivateLabelPrefix = ".L";
Code32Directive = ".code\t32";
Data16bitsDirective = "\t.hword\t";
Data32bitsDirective = "\t.word\t";
Data64bitsDirective = "\t.xword\t";
UseDataRegionDirectives = false;
WeakRefDirective = "\t.weak\t";
SupportsDebugInformation = true;
// Exceptions handling
ExceptionsType = ExceptionHandling::DwarfCFI;
HasIdentDirective = true;
}
AArch64MCAsmInfoMicrosoftCOFF::AArch64MCAsmInfoMicrosoftCOFF() {
PrivateGlobalPrefix = ".L";
PrivateLabelPrefix = ".L";
Data16bitsDirective = "\t.hword\t";
Data32bitsDirective = "\t.word\t";
Data64bitsDirective = "\t.xword\t";
AlignmentIsInBytes = false;
SupportsDebugInformation = true;
CodePointerSize = 8;
CommentString = "//";
ExceptionsType = ExceptionHandling::WinEH;
WinEHEncodingType = WinEH::EncodingType::Itanium;
}
AArch64MCAsmInfoGNUCOFF::AArch64MCAsmInfoGNUCOFF() {
PrivateGlobalPrefix = ".L";
PrivateLabelPrefix = ".L";
Data16bitsDirective = "\t.hword\t";
Data32bitsDirective = "\t.word\t";
Data64bitsDirective = "\t.xword\t";
AlignmentIsInBytes = false;
SupportsDebugInformation = true;
CodePointerSize = 8;
CommentString = "//";
ExceptionsType = ExceptionHandling::WinEH;
WinEHEncodingType = WinEH::EncodingType::Itanium;
}
|
