1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the declarations of the ARMMCAsmInfo properties.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ARMMCAsmInfo.h"
14 #include "llvm/ADT/Triple.h"
15 
16 using namespace llvm;
17 
anchor()18 void ARMMCAsmInfoDarwin::anchor() { }
19 
ARMMCAsmInfoDarwin(const Triple & TheTriple)20 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) {
21   if ((TheTriple.getArch() == Triple::armeb) ||
22       (TheTriple.getArch() == Triple::thumbeb))
23     IsLittleEndian = false;
24 
25   Data64bitsDirective = nullptr;
26   CommentString = "@";
27   Code16Directive = ".code\t16";
28   Code32Directive = ".code\t32";
29   UseDataRegionDirectives = true;
30 
31   SupportsDebugInformation = true;
32 
33   // Conditional Thumb 4-byte instructions can have an implicit IT.
34   MaxInstLength = 6;
35 
36   // Exceptions handling
37   ExceptionsType = (TheTriple.isOSDarwin() && !TheTriple.isWatchABI())
38                        ? ExceptionHandling::SjLj
39                        : ExceptionHandling::DwarfCFI;
40 
41   UseIntegratedAssembler = true;
42 }
43 
anchor()44 void ARMELFMCAsmInfo::anchor() { }
45 
ARMELFMCAsmInfo(const Triple & TheTriple)46 ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) {
47   if ((TheTriple.getArch() == Triple::armeb) ||
48       (TheTriple.getArch() == Triple::thumbeb))
49     IsLittleEndian = false;
50 
51   // ".comm align is in bytes but .align is pow-2."
52   AlignmentIsInBytes = false;
53 
54   Data64bitsDirective = nullptr;
55   CommentString = "@";
56   Code16Directive = ".code\t16";
57   Code32Directive = ".code\t32";
58 
59   SupportsDebugInformation = true;
60 
61   // Conditional Thumb 4-byte instructions can have an implicit IT.
62   MaxInstLength = 6;
63 
64   // Exceptions handling
65   switch (TheTriple.getOS()) {
66   case Triple::NetBSD:
67     ExceptionsType = ExceptionHandling::DwarfCFI;
68     break;
69   default:
70     ExceptionsType = ExceptionHandling::ARM;
71     break;
72   }
73 
74   // foo(plt) instead of foo@plt
75   UseParensForSymbolVariant = true;
76 
77   UseIntegratedAssembler = true;
78 }
79 
setUseIntegratedAssembler(bool Value)80 void ARMELFMCAsmInfo::setUseIntegratedAssembler(bool Value) {
81   UseIntegratedAssembler = Value;
82   if (!UseIntegratedAssembler) {
83     // gas doesn't handle VFP register names in cfi directives,
84     // so don't use register names with external assembler.
85     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16694
86     DwarfRegNumForCFI = true;
87   }
88 }
89 
anchor()90 void ARMCOFFMCAsmInfoMicrosoft::anchor() { }
91 
ARMCOFFMCAsmInfoMicrosoft()92 ARMCOFFMCAsmInfoMicrosoft::ARMCOFFMCAsmInfoMicrosoft() {
93   AlignmentIsInBytes = false;
94   ExceptionsType = ExceptionHandling::WinEH;
95   PrivateGlobalPrefix = "$M";
96   PrivateLabelPrefix = "$M";
97   CommentString = ";";
98 
99   // Conditional Thumb 4-byte instructions can have an implicit IT.
100   MaxInstLength = 6;
101 }
102 
anchor()103 void ARMCOFFMCAsmInfoGNU::anchor() { }
104 
ARMCOFFMCAsmInfoGNU()105 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
106   AlignmentIsInBytes = false;
107   HasSingleParameterDotFile = true;
108 
109   CommentString = "@";
110   Code16Directive = ".code\t16";
111   Code32Directive = ".code\t32";
112   PrivateGlobalPrefix = ".L";
113   PrivateLabelPrefix = ".L";
114 
115   SupportsDebugInformation = true;
116   ExceptionsType = ExceptionHandling::DwarfCFI;
117   UseParensForSymbolVariant = true;
118 
119   UseIntegratedAssembler = true;
120   DwarfRegNumForCFI = false;
121 
122   // Conditional Thumb 4-byte instructions can have an implicit IT.
123   MaxInstLength = 6;
124 }
125