1 //===-- PPCMCExpr.cpp - PPC specific MC expression classes ----------------===//
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
7 //===----------------------------------------------------------------------===//
10 #include "PPCFixupKinds.h"
11 #include "llvm/MC/MCAsmInfo.h"
12 #include "llvm/MC/MCAssembler.h"
13 #include "llvm/MC/MCContext.h"
14 #include "llvm/MC/MCObjectStreamer.h"
18 #define DEBUG_TYPE "ppcmcexpr"
21 PPCMCExpr::create(VariantKind Kind, const MCExpr *Expr,
22 bool IsDarwin, MCContext &Ctx) {
23 return new (Ctx) PPCMCExpr(Kind, Expr, IsDarwin);
26 void PPCMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
27 if (isDarwinSyntax()) {
29 default: llvm_unreachable("Invalid kind!");
30 case VK_PPC_LO: OS << "lo16"; break;
31 case VK_PPC_HI: OS << "hi16"; break;
32 case VK_PPC_HA: OS << "ha16"; break;
36 getSubExpr()->print(OS, MAI);
39 getSubExpr()->print(OS, MAI);
42 default: llvm_unreachable("Invalid kind!");
43 case VK_PPC_LO: OS << "@l"; break;
44 case VK_PPC_HI: OS << "@h"; break;
45 case VK_PPC_HA: OS << "@ha"; break;
46 case VK_PPC_HIGH: OS << "@high"; break;
47 case VK_PPC_HIGHA: OS << "@higha"; break;
48 case VK_PPC_HIGHER: OS << "@higher"; break;
49 case VK_PPC_HIGHERA: OS << "@highera"; break;
50 case VK_PPC_HIGHEST: OS << "@highest"; break;
51 case VK_PPC_HIGHESTA: OS << "@highesta"; break;
57 PPCMCExpr::evaluateAsConstant(int64_t &Res) const {
60 if (!getSubExpr()->evaluateAsRelocatable(Value, nullptr, nullptr))
63 if (!Value.isAbsolute())
66 Res = evaluateAsInt64(Value.getConstant());
71 PPCMCExpr::evaluateAsInt64(int64_t Value) const {
74 return Value & 0xffff;
76 return (Value >> 16) & 0xffff;
78 return ((Value + 0x8000) >> 16) & 0xffff;
80 return (Value >> 16) & 0xffff;
82 return ((Value + 0x8000) >> 16) & 0xffff;
84 return (Value >> 32) & 0xffff;
86 return ((Value + 0x8000) >> 32) & 0xffff;
88 return (Value >> 48) & 0xffff;
90 return ((Value + 0x8000) >> 48) & 0xffff;
94 llvm_unreachable("Invalid kind!");
98 PPCMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
99 const MCAsmLayout *Layout,
100 const MCFixup *Fixup) const {
103 if (!getSubExpr()->evaluateAsRelocatable(Value, Layout, Fixup))
106 if (Value.isAbsolute()) {
107 int64_t Result = evaluateAsInt64(Value.getConstant());
108 if ((Fixup == nullptr || (unsigned)Fixup->getKind() != PPC::fixup_ppc_half16) &&
111 Res = MCValue::get(Result);
116 MCContext &Context = Layout->getAssembler().getContext();
117 const MCSymbolRefExpr *Sym = Value.getSymA();
118 MCSymbolRefExpr::VariantKind Modifier = Sym->getKind();
119 if (Modifier != MCSymbolRefExpr::VK_None)
123 llvm_unreachable("Invalid kind!");
125 Modifier = MCSymbolRefExpr::VK_PPC_LO;
128 Modifier = MCSymbolRefExpr::VK_PPC_HI;
131 Modifier = MCSymbolRefExpr::VK_PPC_HA;
134 Modifier = MCSymbolRefExpr::VK_PPC_HIGH;
137 Modifier = MCSymbolRefExpr::VK_PPC_HIGHA;
140 Modifier = MCSymbolRefExpr::VK_PPC_HIGHERA;
143 Modifier = MCSymbolRefExpr::VK_PPC_HIGHER;
146 Modifier = MCSymbolRefExpr::VK_PPC_HIGHEST;
148 case VK_PPC_HIGHESTA:
149 Modifier = MCSymbolRefExpr::VK_PPC_HIGHESTA;
152 Sym = MCSymbolRefExpr::create(&Sym->getSymbol(), Modifier, Context);
153 Res = MCValue::get(Sym, Value.getSymB(), Value.getConstant());
159 void PPCMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
160 Streamer.visitUsedExpr(*getSubExpr());