1 files changed, 92 insertions, 0 deletions
diff --git a/lib/Target/ARM64/MCTargetDesc/ARM64MCAsmInfo.cpp b/lib/Target/ARM64/MCTargetDesc/ARM64MCAsmInfo.cpp
new file mode 100644
index 0000000..97e0d3c
--- /dev/null
+++ b/lib/Target/ARM64/MCTargetDesc/ARM64MCAsmInfo.cpp
@@ -0,0 +1,92 @@
+//===-- ARM64MCAsmInfo.cpp - ARM64 asm properties -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the declarations of the ARM64MCAsmInfo properties.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARM64MCAsmInfo.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/Support/CommandLine.h"
+using namespace llvm;
+
+enum AsmWriterVariantTy {
+  Default = -1,
+  Generic = 0,
+  Apple = 1
+};
+
+static cl::opt<AsmWriterVariantTy> AsmWriterVariant(
+    "arm64-neon-syntax", cl::init(Default),
+    cl::desc("Choose style of NEON code to emit from ARM64 backend:"),
+    cl::values(clEnumValN(Generic, "generic", "Emit generic NEON assembly"),
+               clEnumValN(Apple, "apple", "Emit Apple-style NEON assembly"),
+               clEnumValEnd));
+
+ARM64MCAsmInfoDarwin::ARM64MCAsmInfoDarwin() {
+  // We prefer NEON instructions to be printed in the short form.
+  AssemblerDialect = AsmWriterVariant == Default ? 1 : AsmWriterVariant;
+
+  PrivateGlobalPrefix = "L";
+  SeparatorString = "%%";
+  CommentString = ";";
+  PointerSize = CalleeSaveStackSlotSize = 8;
+
+  AlignmentIsInBytes = false;
+  UsesELFSectionDirectiveForBSS = true;
+  SupportsDebugInformation = true;
+  UseDataRegionDirectives = true;
+
+  ExceptionsType = ExceptionHandling::DwarfCFI;
+}
+
+const MCExpr *ARM64MCAsmInfoDarwin::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);
+}
+
+ARM64MCAsmInfoELF::ARM64MCAsmInfoELF() {
+  // We prefer NEON instructions to be printed in the short form.
+  AssemblerDialect = AsmWriterVariant == Default ? 0 : AsmWriterVariant;
+
+  PointerSize = 8;
+
+  // ".comm align is in bytes but .align is pow-2."
+  AlignmentIsInBytes = false;
+
+  CommentString = "//";
+  PrivateGlobalPrefix = ".L";
+  Code32Directive = ".code\t32";
+
+  Data16bitsDirective = "\t.hword\t";
+  Data32bitsDirective = "\t.word\t";
+  Data64bitsDirective = "\t.xword\t";
+
+  UseDataRegionDirectives = false;
+
+  WeakRefDirective = "\t.weak\t";
+
+  HasLEB128 = true;
+  SupportsDebugInformation = true;
+
+  // Exceptions handling
+  ExceptionsType = ExceptionHandling::DwarfCFI;
+}