1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the declarations of the ARMMCAsmInfo properties.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ARMMCAsmInfo.h"
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/Support/CommandLine.h"
17 
18 using namespace llvm;
19 
20 void ARMMCAsmInfoDarwin::anchor() { }
21 
22 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) {
23   if ((TheTriple.getArch() == Triple::armeb) ||
24       (TheTriple.getArch() == Triple::thumbeb))
25     IsLittleEndian = false;
26 
27   Data64bitsDirective = nullptr;
28   CommentString = "@";
29   Code16Directive = ".code\t16";
30   Code32Directive = ".code\t32";
31   UseDataRegionDirectives = true;
32 
33   SupportsDebugInformation = true;
34 
35   // Exceptions handling
36   ExceptionsType = ExceptionHandling::SjLj;
37 
38   UseIntegratedAssembler = true;
39 }
40 
41 void ARMELFMCAsmInfo::anchor() { }
42 
43 ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) {
44   if ((TheTriple.getArch() == Triple::armeb) ||
45       (TheTriple.getArch() == Triple::thumbeb))
46     IsLittleEndian = false;
47 
48   // ".comm align is in bytes but .align is pow-2."
49   AlignmentIsInBytes = false;
50 
51   Data64bitsDirective = nullptr;
52   CommentString = "@";
53   Code16Directive = ".code\t16";
54   Code32Directive = ".code\t32";
55 
56   SupportsDebugInformation = true;
57 
58   // Exceptions handling
59   switch (TheTriple.getOS()) {
60   case Triple::Bitrig:
61   case Triple::NetBSD:
62     ExceptionsType = ExceptionHandling::DwarfCFI;
63     break;
64   default:
65     ExceptionsType = ExceptionHandling::ARM;
66     break;
67   }
68 
69   // foo(plt) instead of foo@plt
70   UseParensForSymbolVariant = true;
71 
72   UseIntegratedAssembler = true;
73 }
74 
75 void ARMELFMCAsmInfo::setUseIntegratedAssembler(bool Value) {
76   UseIntegratedAssembler = Value;
77   if (!UseIntegratedAssembler) {
78     // gas doesn't handle VFP register names in cfi directives,
79     // so don't use register names with external assembler.
80     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16694
81     DwarfRegNumForCFI = true;
82   }
83 }
84 
85 void ARMCOFFMCAsmInfoMicrosoft::anchor() { }
86 
87 ARMCOFFMCAsmInfoMicrosoft::ARMCOFFMCAsmInfoMicrosoft() {
88   AlignmentIsInBytes = false;
89 
90   PrivateGlobalPrefix = "$M";
91   PrivateLabelPrefix = "$M";
92 }
93 
94 void ARMCOFFMCAsmInfoGNU::anchor() { }
95 
96 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
97   AlignmentIsInBytes = false;
98   HasSingleParameterDotFile = true;
99 
100   CommentString = "@";
101   Code16Directive = ".code\t16";
102   Code32Directive = ".code\t32";
103   PrivateGlobalPrefix = ".L";
104   PrivateLabelPrefix = ".L";
105 
106   SupportsDebugInformation = true;
107   ExceptionsType = ExceptionHandling::None;
108   UseParensForSymbolVariant = true;
109 
110   UseIntegratedAssembler = false;
111   DwarfRegNumForCFI = true;
112 }
113 
114