1 //===-- PPCMCExpr.cpp - PPC specific MC expression classes ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "ppcmcexpr"
11 #include "PPCMCExpr.h"
12 #include "llvm/MC/MCAssembler.h"
13 #include "llvm/MC/MCContext.h"
14 #include "llvm/MC/MCAsmInfo.h"
19 PPCMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
21 int AssemblerDialect = Ctx.getAsmInfo()->getAssemblerDialect();
22 return new (Ctx) PPCMCExpr(Kind, Expr, AssemblerDialect);
25 void PPCMCExpr::PrintImpl(raw_ostream &OS) const {
26 if (isDarwinSyntax()) {
28 default: llvm_unreachable("Invalid kind!");
29 case VK_PPC_HA16: OS << "ha16"; break;
30 case VK_PPC_LO16: OS << "lo16"; break;
34 getSubExpr()->print(OS);
37 getSubExpr()->print(OS);
40 default: llvm_unreachable("Invalid kind!");
41 case VK_PPC_HA16: OS << "@ha"; break;
42 case VK_PPC_LO16: OS << "@l"; break;
48 PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
49 const MCAsmLayout *Layout) const {
52 if (!getSubExpr()->EvaluateAsRelocatable(Value, *Layout))
55 if (Value.isAbsolute()) {
56 int64_t Result = Value.getConstant();
59 llvm_unreachable("Invalid kind!");
61 Result = ((Result >> 16) + ((Result & 0x8000) ? 1 : 0)) & 0xffff;
64 Result = Result & 0xffff;
67 Res = MCValue::get(Result);
69 MCContext &Context = Layout->getAssembler().getContext();
70 const MCSymbolRefExpr *Sym = Value.getSymA();
71 MCSymbolRefExpr::VariantKind Modifier = Sym->getKind();
72 if (Modifier != MCSymbolRefExpr::VK_None)
76 llvm_unreachable("Invalid kind!");
78 Modifier = MCSymbolRefExpr::VK_PPC_ADDR16_HA;
81 Modifier = MCSymbolRefExpr::VK_PPC_ADDR16_LO;
84 Sym = MCSymbolRefExpr::Create(&Sym->getSymbol(), Modifier, Context);
85 Res = MCValue::get(Sym, Value.getSymB(), Value.getConstant());
91 // FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
92 // that method should be made public?
93 static void AddValueSymbols_(const MCExpr *Value, MCAssembler *Asm) {
94 switch (Value->getKind()) {
96 llvm_unreachable("Can't handle nested target expr!");
98 case MCExpr::Constant:
101 case MCExpr::Binary: {
102 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
103 AddValueSymbols_(BE->getLHS(), Asm);
104 AddValueSymbols_(BE->getRHS(), Asm);
108 case MCExpr::SymbolRef:
109 Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
113 AddValueSymbols_(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
118 void PPCMCExpr::AddValueSymbols(MCAssembler *Asm) const {
119 AddValueSymbols_(getSubExpr(), Asm);