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//===-- PPCMCAsmInfo.cpp - PPC asm properties -----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the MCAsmInfoDarwin properties.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/PPCMCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
using namespace llvm;
void PPCELFMCAsmInfo::anchor() { }
const MCAsmInfo::AtSpecifier elfAtSpecifiers[] = {
{PPC::S_DTPREL, "DTPREL"},
{PPC::S_GOT, "GOT"},
{PPC::S_GOT_HA, "got@ha"},
{PPC::S_GOT_HI, "got@h"},
{PPC::S_GOT_LO, "got@l"},
{PPC::S_HA, "ha"},
{PPC::S_HI, "h"},
{PPC::S_HIGH, "high"},
{PPC::S_HIGHA, "higha"},
{PPC::S_HIGHER, "higher"},
{PPC::S_HIGHERA, "highera"},
{PPC::S_HIGHEST, "highest"},
{PPC::S_HIGHESTA, "highesta"},
{PPC::S_LO, "l"},
{PPC::S_PCREL, "PCREL"},
{PPC::S_PLT, "PLT"},
{PPC::S_TLSGD, "tlsgd"},
{PPC::S_TLSLD, "tlsld"},
{PPC::S_TOC, "toc"},
{PPC::S_TOCBASE, "tocbase"},
{PPC::S_TOC_HA, "toc@ha"},
{PPC::S_TOC_HI, "toc@h"},
{PPC::S_TOC_LO, "toc@l"},
{PPC::S_TPREL, "TPREL"},
{PPC::S_AIX_TLSGD, "gd"},
{PPC::S_AIX_TLSGDM, "m"},
{PPC::S_AIX_TLSIE, "ie"},
{PPC::S_AIX_TLSLD, "ld"},
{PPC::S_AIX_TLSLE, "le"},
{PPC::S_AIX_TLSML, "ml"},
{PPC::S_DTPMOD, "dtpmod"},
{PPC::S_DTPREL_HA, "dtprel@ha"},
{PPC::S_DTPREL_HI, "dtprel@h"},
{PPC::S_DTPREL_HIGH, "dtprel@high"},
{PPC::S_DTPREL_HIGHA, "dtprel@higha"},
{PPC::S_DTPREL_HIGHER, "dtprel@higher"},
{PPC::S_DTPREL_HIGHERA, "dtprel@highera"},
{PPC::S_DTPREL_HIGHEST, "dtprel@highest"},
{PPC::S_DTPREL_HIGHESTA, "dtprel@highesta"},
{PPC::S_DTPREL_LO, "dtprel@l"},
{PPC::S_GOT_DTPREL, "got@dtprel"},
{PPC::S_GOT_DTPREL_HA, "got@dtprel@ha"},
{PPC::S_GOT_DTPREL_HI, "got@dtprel@h"},
{PPC::S_GOT_DTPREL_LO, "got@dtprel@l"},
{PPC::S_GOT_PCREL, "got@pcrel"},
{PPC::S_GOT_TLSGD, "got@tlsgd"},
{PPC::S_GOT_TLSGD_HA, "got@tlsgd@ha"},
{PPC::S_GOT_TLSGD_HI, "got@tlsgd@h"},
{PPC::S_GOT_TLSGD_LO, "got@tlsgd@l"},
{PPC::S_GOT_TLSGD_PCREL, "got@tlsgd@pcrel"},
{PPC::S_GOT_TLSLD, "got@tlsld"},
{PPC::S_GOT_TLSLD_HA, "got@tlsld@ha"},
{PPC::S_GOT_TLSLD_HI, "got@tlsld@h"},
{PPC::S_GOT_TLSLD_LO, "got@tlsld@l"},
{PPC::S_GOT_TLSLD_PCREL, "got@tlsld@pcrel"},
{PPC::S_GOT_TPREL, "got@tprel"},
{PPC::S_GOT_TPREL_HA, "got@tprel@ha"},
{PPC::S_GOT_TPREL_HI, "got@tprel@h"},
{PPC::S_GOT_TPREL_LO, "got@tprel@l"},
{PPC::S_GOT_TPREL_PCREL, "got@tprel@pcrel"},
{PPC::S_LOCAL, "local"},
{PPC::S_NOTOC, "notoc"},
{PPC::S_PCREL_OPT, "<<invalid>>"},
{PPC::S_TLS, "tls"},
{PPC::S_TLS_PCREL, "tls@pcrel"},
{PPC::S_TPREL_HA, "tprel@ha"},
{PPC::S_TPREL_HI, "tprel@h"},
{PPC::S_TPREL_HIGH, "tprel@high"},
{PPC::S_TPREL_HIGHA, "tprel@higha"},
{PPC::S_TPREL_HIGHER, "tprel@higher"},
{PPC::S_TPREL_HIGHERA, "tprel@highera"},
{PPC::S_TPREL_HIGHEST, "tprel@highest"},
{PPC::S_TPREL_HIGHESTA, "tprel@highesta"},
{PPC::S_TPREL_LO, "tprel@l"},
};
const MCAsmInfo::AtSpecifier xcoffAtSpecifiers[] = {
// clang-format off
{PPC::S_AIX_TLSGD, "gd"},
{PPC::S_AIX_TLSGDM, "m"},
{PPC::S_AIX_TLSIE, "ie"},
{PPC::S_AIX_TLSLD, "ld"},
{PPC::S_AIX_TLSLE, "le"},
{PPC::S_AIX_TLSML, "ml"},
{PPC::S_L, "l"},
{PPC::S_U, "u"},
// clang-format on
};
static std::optional<int64_t> evaluateAsInt64(uint16_t specifier,
int64_t Value) {
switch (specifier) {
case PPC::S_LO:
return Value & 0xffff;
case PPC::S_HI:
return (Value >> 16) & 0xffff;
case PPC::S_HA:
return ((Value + 0x8000) >> 16) & 0xffff;
case PPC::S_HIGH:
return (Value >> 16) & 0xffff;
case PPC::S_HIGHA:
return ((Value + 0x8000) >> 16) & 0xffff;
case PPC::S_HIGHER:
return (Value >> 32) & 0xffff;
case PPC::S_HIGHERA:
return ((Value + 0x8000) >> 32) & 0xffff;
case PPC::S_HIGHEST:
return (Value >> 48) & 0xffff;
case PPC::S_HIGHESTA:
return ((Value + 0x8000) >> 48) & 0xffff;
default:
return {};
}
}
bool PPC::evaluateAsConstant(const MCSpecifierExpr &Expr, int64_t &Res) {
MCValue Value;
if (!Expr.getSubExpr()->evaluateAsRelocatable(Value, nullptr))
return false;
if (!Value.isAbsolute())
return false;
auto Tmp = evaluateAsInt64(Expr.getSpecifier(), Value.getConstant());
if (!Tmp)
return false;
Res = *Tmp;
return true;
}
static bool evaluateAsRelocatable(const MCSpecifierExpr &Expr, MCValue &Res,
const MCAssembler *Asm) {
if (!Expr.getSubExpr()->evaluateAsRelocatable(Res, Asm))
return false;
// The signedness of the result is dependent on the instruction operand. E.g.
// in addis 3,3,65535@l, 65535@l is signed. In the absence of information at
// parse time (!Asm), disable the folding.
std::optional<int64_t> MaybeInt =
evaluateAsInt64(Expr.getSpecifier(), Res.getConstant());
if (Res.isAbsolute() && MaybeInt) {
Res = MCValue::get(*MaybeInt);
} else {
Res.setSpecifier(Expr.getSpecifier());
}
return true;
}
PPCELFMCAsmInfo::PPCELFMCAsmInfo(bool is64Bit, const Triple& T) {
// FIXME: This is not always needed. For example, it is not needed in the
// v2 abi.
NeedsLocalForSize = true;
if (is64Bit) {
CodePointerSize = CalleeSaveStackSlotSize = 8;
}
IsLittleEndian =
T.getArch() == Triple::ppc64le || T.getArch() == Triple::ppcle;
// ".comm align is in bytes but .align is pow-2."
AlignmentIsInBytes = false;
CommentString = "#";
// Uses '.section' before '.bss' directive
UsesELFSectionDirectiveForBSS = true;
// Debug Information
SupportsDebugInformation = true;
DollarIsPC = true;
AllowDollarAtStartOfIdentifier = false;
// Set up DWARF directives
MinInstAlignment = 4;
// Exceptions handling
ExceptionsType = ExceptionHandling::DwarfCFI;
ZeroDirective = "\t.space\t";
Data64bitsDirective = is64Bit ? "\t.quad\t" : nullptr;
AssemblerDialect = 1; // New-Style mnemonics.
LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;
initializeAtSpecifiers(elfAtSpecifiers);
}
void PPCELFMCAsmInfo::printSpecifierExpr(raw_ostream &OS,
const MCSpecifierExpr &Expr) const {
printExpr(OS, *Expr.getSubExpr());
OS << '@' << getSpecifierName(Expr.getSpecifier());
}
bool PPCELFMCAsmInfo::evaluateAsRelocatableImpl(const MCSpecifierExpr &Expr,
MCValue &Res,
const MCAssembler *Asm) const {
return evaluateAsRelocatable(Expr, Res, Asm);
}
PPCXCOFFMCAsmInfo::PPCXCOFFMCAsmInfo(bool Is64Bit, const Triple &T) {
if (T.getArch() == Triple::ppc64le || T.getArch() == Triple::ppcle)
report_fatal_error("XCOFF is not supported for little-endian targets");
CodePointerSize = CalleeSaveStackSlotSize = Is64Bit ? 8 : 4;
// A size of 8 is only supported by the assembler under 64-bit.
Data64bitsDirective = Is64Bit ? "\t.vbyte\t8, " : nullptr;
// Debug Information
SupportsDebugInformation = true;
// Set up DWARF directives
MinInstAlignment = 4;
// Support $ as PC in inline asm
DollarIsPC = true;
AllowDollarAtStartOfIdentifier = false;
UsesSetToEquateSymbol = true;
initializeAtSpecifiers(xcoffAtSpecifiers);
}
void PPCXCOFFMCAsmInfo::printSpecifierExpr(raw_ostream &OS,
const MCSpecifierExpr &Expr) const {
printExpr(OS, *Expr.getSubExpr());
OS << '@' << getSpecifierName(Expr.getSpecifier());
}
bool PPCXCOFFMCAsmInfo::evaluateAsRelocatableImpl(
const MCSpecifierExpr &Expr, MCValue &Res, const MCAssembler *Asm) const {
return evaluateAsRelocatable(Expr, Res, Asm);
}
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