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//===-- PPCMCExpr.cpp - PPC specific MC expression classes ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "PPCMCExpr.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCObjectStreamer.h"
using namespace llvm;
#define DEBUG_TYPE "ppcmcexpr"
const PPCMCExpr*
PPCMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
bool isDarwin, MCContext &Ctx) {
return new (Ctx) PPCMCExpr(Kind, Expr, isDarwin);
}
void PPCMCExpr::PrintImpl(raw_ostream &OS) const {
if (isDarwinSyntax()) {
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case VK_PPC_LO: OS << "lo16"; break;
case VK_PPC_HI: OS << "hi16"; break;
case VK_PPC_HA: OS << "ha16"; break;
}
OS << '(';
getSubExpr()->print(OS);
OS << ')';
} else {
getSubExpr()->print(OS);
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case VK_PPC_LO: OS << "@l"; break;
case VK_PPC_HI: OS << "@h"; break;
case VK_PPC_HA: OS << "@ha"; break;
case VK_PPC_HIGHER: OS << "@higher"; break;
case VK_PPC_HIGHERA: OS << "@highera"; break;
case VK_PPC_HIGHEST: OS << "@highest"; break;
case VK_PPC_HIGHESTA: OS << "@highesta"; break;
}
}
}
bool
PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const {
MCValue Value;
if (!getSubExpr()->EvaluateAsRelocatable(Value, Layout))
return false;
if (Value.isAbsolute()) {
int64_t Result = Value.getConstant();
switch (Kind) {
default:
llvm_unreachable("Invalid kind!");
case VK_PPC_LO:
Result = Result & 0xffff;
break;
case VK_PPC_HI:
Result = (Result >> 16) & 0xffff;
break;
case VK_PPC_HA:
Result = ((Result + 0x8000) >> 16) & 0xffff;
break;
case VK_PPC_HIGHER:
Result = (Result >> 32) & 0xffff;
break;
case VK_PPC_HIGHERA:
Result = ((Result + 0x8000) >> 32) & 0xffff;
break;
case VK_PPC_HIGHEST:
Result = (Result >> 48) & 0xffff;
break;
case VK_PPC_HIGHESTA:
Result = ((Result + 0x8000) >> 48) & 0xffff;
break;
}
Res = MCValue::get(Result);
} else {
if (!Layout)
return false;
MCContext &Context = Layout->getAssembler().getContext();
const MCSymbolRefExpr *Sym = Value.getSymA();
MCSymbolRefExpr::VariantKind Modifier = Sym->getKind();
if (Modifier != MCSymbolRefExpr::VK_None)
return false;
switch (Kind) {
default:
llvm_unreachable("Invalid kind!");
case VK_PPC_LO:
Modifier = MCSymbolRefExpr::VK_PPC_LO;
break;
case VK_PPC_HI:
Modifier = MCSymbolRefExpr::VK_PPC_HI;
break;
case VK_PPC_HA:
Modifier = MCSymbolRefExpr::VK_PPC_HA;
break;
case VK_PPC_HIGHERA:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHERA;
break;
case VK_PPC_HIGHER:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHER;
break;
case VK_PPC_HIGHEST:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHEST;
break;
case VK_PPC_HIGHESTA:
Modifier = MCSymbolRefExpr::VK_PPC_HIGHESTA;
break;
}
Sym = MCSymbolRefExpr::Create(&Sym->getSymbol(), Modifier, Context);
Res = MCValue::get(Sym, Value.getSymB(), Value.getConstant());
}
return true;
}
void PPCMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
Streamer.visitUsedExpr(*getSubExpr());
}
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