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-rw-r--r--tools/llvm-mc/AsmExpr.cpp162
-rw-r--r--tools/llvm-mc/AsmExpr.h179
-rw-r--r--tools/llvm-mc/MC-X86Specific.cpp266
3 files changed, 0 insertions, 607 deletions
diff --git a/tools/llvm-mc/AsmExpr.cpp b/tools/llvm-mc/AsmExpr.cpp
deleted file mode 100644
index c3362e4..0000000
--- a/tools/llvm-mc/AsmExpr.cpp
+++ /dev/null
@@ -1,162 +0,0 @@
-//===- AsmExpr.cpp - Assembly file expressions ----------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AsmExpr.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCValue.h"
-using namespace llvm;
-
-AsmExpr::~AsmExpr() {
-}
-
-bool AsmExpr::EvaluateAsAbsolute(MCContext &Ctx, int64_t &Res) const {
- MCValue Value;
-
- if (!EvaluateAsRelocatable(Ctx, Value) || !Value.isAbsolute())
- return false;
-
- Res = Value.getConstant();
- return true;
-}
-
-static bool EvaluateSymbolicAdd(const MCValue &LHS, MCSymbol *RHS_A,
- MCSymbol *RHS_B, int64_t RHS_Cst,
- MCValue &Res) {
- // We can't add or subtract two symbols.
- if ((LHS.getSymA() && RHS_A) ||
- (LHS.getSymB() && RHS_B))
- return false;
-
- MCSymbol *A = LHS.getSymA() ? LHS.getSymA() : RHS_A;
- MCSymbol *B = LHS.getSymB() ? LHS.getSymB() : RHS_B;
- if (B) {
- // If we have a negated symbol, then we must have also have a non-negated
- // symbol in order to encode the expression. We can do this check later to
- // permit expressions which eventually fold to a representable form -- such
- // as (a + (0 - b)) -- if necessary.
- if (!A)
- return false;
- }
- Res = MCValue::get(A, B, LHS.getConstant() + RHS_Cst);
- return true;
-}
-
-bool AsmExpr::EvaluateAsRelocatable(MCContext &Ctx, MCValue &Res) const {
- switch (getKind()) {
- default:
- assert(0 && "Invalid assembly expression kind!");
-
- case Constant:
- Res = MCValue::get(cast<AsmConstantExpr>(this)->getValue());
- return true;
-
- case SymbolRef: {
- MCSymbol *Sym = cast<AsmSymbolRefExpr>(this)->getSymbol();
- if (const MCValue *Value = Ctx.GetSymbolValue(Sym))
- Res = *Value;
- else
- Res = MCValue::get(Sym, 0, 0);
- return true;
- }
-
- case Unary: {
- const AsmUnaryExpr *AUE = cast<AsmUnaryExpr>(this);
- MCValue Value;
-
- if (!AUE->getSubExpr()->EvaluateAsRelocatable(Ctx, Value))
- return false;
-
- switch (AUE->getOpcode()) {
- case AsmUnaryExpr::LNot:
- if (!Value.isAbsolute())
- return false;
- Res = MCValue::get(!Value.getConstant());
- break;
- case AsmUnaryExpr::Minus:
- /// -(a - b + const) ==> (b - a - const)
- if (Value.getSymA() && !Value.getSymA())
- return false;
- Res = MCValue::get(Value.getSymB(), Value.getSymA(),
- -Value.getConstant());
- break;
- case AsmUnaryExpr::Not:
- if (!Value.isAbsolute())
- return false;
- Res = MCValue::get(~Value.getConstant());
- break;
- case AsmUnaryExpr::Plus:
- Res = Value;
- break;
- }
-
- return true;
- }
-
- case Binary: {
- const AsmBinaryExpr *ABE = cast<AsmBinaryExpr>(this);
- MCValue LHSValue, RHSValue;
-
- if (!ABE->getLHS()->EvaluateAsRelocatable(Ctx, LHSValue) ||
- !ABE->getRHS()->EvaluateAsRelocatable(Ctx, RHSValue))
- return false;
-
- // We only support a few operations on non-constant expressions, handle
- // those first.
- if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
- switch (ABE->getOpcode()) {
- default:
- return false;
- case AsmBinaryExpr::Sub:
- // Negate RHS and add.
- return EvaluateSymbolicAdd(LHSValue,
- RHSValue.getSymB(), RHSValue.getSymA(),
- -RHSValue.getConstant(),
- Res);
-
- case AsmBinaryExpr::Add:
- return EvaluateSymbolicAdd(LHSValue,
- RHSValue.getSymA(), RHSValue.getSymB(),
- RHSValue.getConstant(),
- Res);
- }
- }
-
- // FIXME: We need target hooks for the evaluation. It may be limited in
- // width, and gas defines the result of comparisons differently from Apple
- // as (the result is sign extended).
- int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
- int64_t Result = 0;
- switch (ABE->getOpcode()) {
- case AsmBinaryExpr::Add: Result = LHS + RHS; break;
- case AsmBinaryExpr::And: Result = LHS & RHS; break;
- case AsmBinaryExpr::Div: Result = LHS / RHS; break;
- case AsmBinaryExpr::EQ: Result = LHS == RHS; break;
- case AsmBinaryExpr::GT: Result = LHS > RHS; break;
- case AsmBinaryExpr::GTE: Result = LHS >= RHS; break;
- case AsmBinaryExpr::LAnd: Result = LHS && RHS; break;
- case AsmBinaryExpr::LOr: Result = LHS || RHS; break;
- case AsmBinaryExpr::LT: Result = LHS < RHS; break;
- case AsmBinaryExpr::LTE: Result = LHS <= RHS; break;
- case AsmBinaryExpr::Mod: Result = LHS % RHS; break;
- case AsmBinaryExpr::Mul: Result = LHS * RHS; break;
- case AsmBinaryExpr::NE: Result = LHS != RHS; break;
- case AsmBinaryExpr::Or: Result = LHS | RHS; break;
- case AsmBinaryExpr::Shl: Result = LHS << RHS; break;
- case AsmBinaryExpr::Shr: Result = LHS >> RHS; break;
- case AsmBinaryExpr::Sub: Result = LHS - RHS; break;
- case AsmBinaryExpr::Xor: Result = LHS ^ RHS; break;
- }
-
- Res = MCValue::get(Result);
- return true;
- }
- }
-}
-
diff --git a/tools/llvm-mc/AsmExpr.h b/tools/llvm-mc/AsmExpr.h
deleted file mode 100644
index 84e58ff..0000000
--- a/tools/llvm-mc/AsmExpr.h
+++ /dev/null
@@ -1,179 +0,0 @@
-//===- AsmExpr.h - Assembly file expressions --------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef ASMEXPR_H
-#define ASMEXPR_H
-
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/DataTypes.h"
-
-namespace llvm {
-class MCContext;
-class MCSymbol;
-class MCValue;
-
-/// AsmExpr - Base class for the full range of assembler expressions which are
-/// needed for parsing.
-class AsmExpr {
-public:
- enum AsmExprKind {
- Binary, ///< Binary expressions.
- Constant, ///< Constant expressions.
- SymbolRef, ///< References to labels and assigned expressions.
- Unary ///< Unary expressions.
- };
-
-private:
- AsmExprKind Kind;
-
-protected:
- AsmExpr(AsmExprKind _Kind) : Kind(_Kind) {}
-
-public:
- virtual ~AsmExpr();
-
- AsmExprKind getKind() const { return Kind; }
-
- /// EvaluateAsAbsolute - Try to evaluate the expression to an absolute value.
- ///
- /// @param Res - The absolute value, if evaluation succeeds.
- /// @result - True on success.
- bool EvaluateAsAbsolute(MCContext &Ctx, int64_t &Res) const;
-
- /// EvaluateAsRelocatable - Try to evaluate the expression to a relocatable
- /// value, i.e. an expression of the fixed form (a - b + constant).
- ///
- /// @param Res - The relocatable value, if evaluation succeeds.
- /// @result - True on success.
- bool EvaluateAsRelocatable(MCContext &Ctx, MCValue &Res) const;
-
- static bool classof(const AsmExpr *) { return true; }
-};
-
-//// AsmConstantExpr - Represent a constant integer expression.
-class AsmConstantExpr : public AsmExpr {
- int64_t Value;
-
-public:
- AsmConstantExpr(int64_t _Value)
- : AsmExpr(AsmExpr::Constant), Value(_Value) {}
-
- int64_t getValue() const { return Value; }
-
- static bool classof(const AsmExpr *E) {
- return E->getKind() == AsmExpr::Constant;
- }
- static bool classof(const AsmConstantExpr *) { return true; }
-};
-
-/// AsmSymbolRefExpr - Represent a reference to a symbol from inside an
-/// expression.
-///
-/// A symbol reference in an expression may be a use of a label, a use of an
-/// assembler variable (defined constant), or constitute an implicit definition
-/// of the symbol as external.
-class AsmSymbolRefExpr : public AsmExpr {
- MCSymbol *Symbol;
-
-public:
- AsmSymbolRefExpr(MCSymbol *_Symbol)
- : AsmExpr(AsmExpr::SymbolRef), Symbol(_Symbol) {}
-
- MCSymbol *getSymbol() const { return Symbol; }
-
- static bool classof(const AsmExpr *E) {
- return E->getKind() == AsmExpr::SymbolRef;
- }
- static bool classof(const AsmSymbolRefExpr *) { return true; }
-};
-
-/// AsmUnaryExpr - Unary assembler expressions.
-class AsmUnaryExpr : public AsmExpr {
-public:
- enum Opcode {
- LNot, ///< Logical negation.
- Minus, ///< Unary minus.
- Not, ///< Bitwise negation.
- Plus ///< Unary plus.
- };
-
-private:
- Opcode Op;
- AsmExpr *Expr;
-
-public:
- AsmUnaryExpr(Opcode _Op, AsmExpr *_Expr)
- : AsmExpr(AsmExpr::Unary), Op(_Op), Expr(_Expr) {}
- ~AsmUnaryExpr() {
- delete Expr;
- }
-
- Opcode getOpcode() const { return Op; }
-
- AsmExpr *getSubExpr() const { return Expr; }
-
- static bool classof(const AsmExpr *E) {
- return E->getKind() == AsmExpr::Unary;
- }
- static bool classof(const AsmUnaryExpr *) { return true; }
-};
-
-/// AsmBinaryExpr - Binary assembler expressions.
-class AsmBinaryExpr : public AsmExpr {
-public:
- enum Opcode {
- Add, ///< Addition.
- And, ///< Bitwise and.
- Div, ///< Division.
- EQ, ///< Equality comparison.
- GT, ///< Greater than comparison.
- GTE, ///< Greater than or equal comparison.
- LAnd, ///< Logical and.
- LOr, ///< Logical or.
- LT, ///< Less than comparison.
- LTE, ///< Less than or equal comparison.
- Mod, ///< Modulus.
- Mul, ///< Multiplication.
- NE, ///< Inequality comparison.
- Or, ///< Bitwise or.
- Shl, ///< Bitwise shift left.
- Shr, ///< Bitwise shift right.
- Sub, ///< Subtraction.
- Xor ///< Bitwise exclusive or.
- };
-
-private:
- Opcode Op;
- AsmExpr *LHS, *RHS;
-
-public:
- AsmBinaryExpr(Opcode _Op, AsmExpr *_LHS, AsmExpr *_RHS)
- : AsmExpr(AsmExpr::Binary), Op(_Op), LHS(_LHS), RHS(_RHS) {}
- ~AsmBinaryExpr() {
- delete LHS;
- delete RHS;
- }
-
- Opcode getOpcode() const { return Op; }
-
- /// getLHS - Get the left-hand side expression of the binary operator.
- AsmExpr *getLHS() const { return LHS; }
-
- /// getRHS - Get the right-hand side expression of the binary operator.
- AsmExpr *getRHS() const { return RHS; }
-
- static bool classof(const AsmExpr *E) {
- return E->getKind() == AsmExpr::Binary;
- }
- static bool classof(const AsmBinaryExpr *) { return true; }
-};
-
-} // end namespace llvm
-
-#endif
diff --git a/tools/llvm-mc/MC-X86Specific.cpp b/tools/llvm-mc/MC-X86Specific.cpp
deleted file mode 100644
index fec13ce..0000000
--- a/tools/llvm-mc/MC-X86Specific.cpp
+++ /dev/null
@@ -1,266 +0,0 @@
-//===- MC-X86Specific.cpp - X86-Specific code for MC ----------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements X86-specific parsing, encoding and decoding stuff for
-// MC.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AsmParser.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/Support/SourceMgr.h"
-using namespace llvm;
-
-/// X86Operand - Instances of this class represent one X86 machine instruction.
-struct AsmParser::X86Operand {
- enum {
- Register,
- Immediate,
- Memory
- } Kind;
-
- union {
- struct {
- unsigned RegNo;
- } Reg;
-
- struct {
- MCValue Val;
- } Imm;
-
- struct {
- unsigned SegReg;
- MCValue Disp;
- unsigned BaseReg;
- unsigned IndexReg;
- unsigned Scale;
- } Mem;
- };
-
- unsigned getReg() const {
- assert(Kind == Register && "Invalid access!");
- return Reg.RegNo;
- }
-
- static X86Operand CreateReg(unsigned RegNo) {
- X86Operand Res;
- Res.Kind = Register;
- Res.Reg.RegNo = RegNo;
- return Res;
- }
- static X86Operand CreateImm(MCValue Val) {
- X86Operand Res;
- Res.Kind = Immediate;
- Res.Imm.Val = Val;
- return Res;
- }
- static X86Operand CreateMem(unsigned SegReg, MCValue Disp, unsigned BaseReg,
- unsigned IndexReg, unsigned Scale) {
- // If there is no index register, we should never have a scale, and we
- // should always have a scale (in {1,2,4,8}) if we do.
- assert(((Scale == 0 && !IndexReg) ||
- (IndexReg && (Scale == 1 || Scale == 2 ||
- Scale == 4 || Scale == 8))) &&
- "Invalid scale!");
- X86Operand Res;
- Res.Kind = Memory;
- Res.Mem.SegReg = SegReg;
- Res.Mem.Disp = Disp;
- Res.Mem.BaseReg = BaseReg;
- Res.Mem.IndexReg = IndexReg;
- Res.Mem.Scale = Scale;
- return Res;
- }
-};
-
-bool AsmParser::ParseX86Register(X86Operand &Op) {
- assert(Lexer.getKind() == asmtok::Register && "Invalid token kind!");
-
- // FIXME: Decode register number.
- Op = X86Operand::CreateReg(123);
- Lexer.Lex(); // Eat register token.
-
- return false;
-}
-
-bool AsmParser::ParseX86Operand(X86Operand &Op) {
- switch (Lexer.getKind()) {
- default:
- return ParseX86MemOperand(Op);
- case asmtok::Register:
- // FIXME: if a segment register, this could either be just the seg reg, or
- // the start of a memory operand.
- return ParseX86Register(Op);
- case asmtok::Dollar: {
- // $42 -> immediate.
- Lexer.Lex();
- MCValue Val;
- if (ParseRelocatableExpression(Val))
- return true;
- Op = X86Operand::CreateImm(Val);
- return false;
- }
- case asmtok::Star: {
- Lexer.Lex(); // Eat the star.
-
- if (Lexer.is(asmtok::Register)) {
- if (ParseX86Register(Op))
- return true;
- } else if (ParseX86MemOperand(Op))
- return true;
-
- // FIXME: Note the '*' in the operand for use by the matcher.
- return false;
- }
- }
-}
-
-/// ParseX86MemOperand: segment: disp(basereg, indexreg, scale)
-bool AsmParser::ParseX86MemOperand(X86Operand &Op) {
- // FIXME: If SegReg ':' (e.g. %gs:), eat and remember.
- unsigned SegReg = 0;
-
- // We have to disambiguate a parenthesized expression "(4+5)" from the start
- // of a memory operand with a missing displacement "(%ebx)" or "(,%eax)". The
- // only way to do this without lookahead is to eat the ( and see what is after
- // it.
- MCValue Disp = MCValue::get(0, 0, 0);
- if (Lexer.isNot(asmtok::LParen)) {
- if (ParseRelocatableExpression(Disp)) return true;
-
- // After parsing the base expression we could either have a parenthesized
- // memory address or not. If not, return now. If so, eat the (.
- if (Lexer.isNot(asmtok::LParen)) {
- Op = X86Operand::CreateMem(SegReg, Disp, 0, 0, 0);
- return false;
- }
-
- // Eat the '('.
- Lexer.Lex();
- } else {
- // Okay, we have a '('. We don't know if this is an expression or not, but
- // so we have to eat the ( to see beyond it.
- Lexer.Lex(); // Eat the '('.
-
- if (Lexer.is(asmtok::Register) || Lexer.is(asmtok::Comma)) {
- // Nothing to do here, fall into the code below with the '(' part of the
- // memory operand consumed.
- } else {
- // It must be an parenthesized expression, parse it now.
- if (ParseParenRelocatableExpression(Disp))
- return true;
-
- // After parsing the base expression we could either have a parenthesized
- // memory address or not. If not, return now. If so, eat the (.
- if (Lexer.isNot(asmtok::LParen)) {
- Op = X86Operand::CreateMem(SegReg, Disp, 0, 0, 0);
- return false;
- }
-
- // Eat the '('.
- Lexer.Lex();
- }
- }
-
- // If we reached here, then we just ate the ( of the memory operand. Process
- // the rest of the memory operand.
- unsigned BaseReg = 0, IndexReg = 0, Scale = 0;
-
- if (Lexer.is(asmtok::Register)) {
- if (ParseX86Register(Op))
- return true;
- BaseReg = Op.getReg();
- }
-
- if (Lexer.is(asmtok::Comma)) {
- Lexer.Lex(); // Eat the comma.
-
- // Following the comma we should have either an index register, or a scale
- // value. We don't support the later form, but we want to parse it
- // correctly.
- //
- // Not that even though it would be completely consistent to support syntax
- // like "1(%eax,,1)", the assembler doesn't.
- if (Lexer.is(asmtok::Register)) {
- if (ParseX86Register(Op))
- return true;
- IndexReg = Op.getReg();
- Scale = 1; // If not specified, the scale defaults to 1.
-
- if (Lexer.isNot(asmtok::RParen)) {
- // Parse the scale amount:
- // ::= ',' [scale-expression]
- if (Lexer.isNot(asmtok::Comma))
- return true;
- Lexer.Lex(); // Eat the comma.
-
- if (Lexer.isNot(asmtok::RParen)) {
- int64_t ScaleVal;
- if (ParseAbsoluteExpression(ScaleVal))
- return true;
-
- // Validate the scale amount.
- if (ScaleVal != 1 && ScaleVal != 2 && ScaleVal != 4 && ScaleVal != 8)
- return TokError("scale factor in address must be 1, 2, 4 or 8");
- Scale = (unsigned)ScaleVal;
- }
- }
- } else if (Lexer.isNot(asmtok::RParen)) {
- // Otherwise we have the unsupported form of a scale amount without an
- // index.
- SMLoc Loc = Lexer.getLoc();
-
- int64_t Value;
- if (ParseAbsoluteExpression(Value))
- return true;
-
- return Error(Loc, "cannot have scale factor without index register");
- }
- }
-
- // Ok, we've eaten the memory operand, verify we have a ')' and eat it too.
- if (Lexer.isNot(asmtok::RParen))
- return TokError("unexpected token in memory operand");
- Lexer.Lex(); // Eat the ')'.
-
- Op = X86Operand::CreateMem(SegReg, Disp, BaseReg, IndexReg, Scale);
- return false;
-}
-
-/// MatchX86Inst - Convert a parsed instruction name and operand list into a
-/// concrete instruction.
-static bool MatchX86Inst(const char *Name,
- llvm::SmallVector<AsmParser::X86Operand, 3> &Operands,
- MCInst &Inst) {
- return false;
-}
-
-/// ParseX86InstOperands - Parse the operands of an X86 instruction and return
-/// them as the operands of an MCInst.
-bool AsmParser::ParseX86InstOperands(const char *InstName, MCInst &Inst) {
- llvm::SmallVector<X86Operand, 3> Operands;
-
- if (Lexer.isNot(asmtok::EndOfStatement)) {
- // Read the first operand.
- Operands.push_back(X86Operand());
- if (ParseX86Operand(Operands.back()))
- return true;
-
- while (Lexer.is(asmtok::Comma)) {
- Lexer.Lex(); // Eat the comma.
-
- // Parse and remember the operand.
- Operands.push_back(X86Operand());
- if (ParseX86Operand(Operands.back()))
- return true;
- }
- }
-
- return MatchX86Inst(InstName, Operands, Inst);
-}
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