mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
55d7d83b6c
This just adds the basics necessary for allocating the upper words to virtual registers (move, load and store). The move support is parameterised in a way that makes it easy to handle zero extensions, but the associated zero-extend patterns are added by a later patch. The easiest way of testing this seemed to be add a new "h" register constraint for high words. I don't expect the constraint to be useful in real inline asms, but it should work, so I didn't try to hide it behind an option. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191739 91177308-0d34-0410-b5e6-96231b3b80d8
807 lines
27 KiB
C++
807 lines
27 KiB
C++
//===-- SystemZAsmParser.cpp - Parse SystemZ assembly instructions --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/SystemZMCTargetDesc.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MCTargetAsmParser.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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// Return true if Expr is in the range [MinValue, MaxValue].
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static bool inRange(const MCExpr *Expr, int64_t MinValue, int64_t MaxValue) {
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if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr)) {
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int64_t Value = CE->getValue();
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return Value >= MinValue && Value <= MaxValue;
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}
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return false;
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}
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namespace {
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enum RegisterKind {
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GR32Reg,
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GRH32Reg,
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GR64Reg,
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GR128Reg,
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ADDR32Reg,
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ADDR64Reg,
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FP32Reg,
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FP64Reg,
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FP128Reg
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};
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enum MemoryKind {
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BDMem,
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BDXMem,
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BDLMem
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};
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class SystemZOperand : public MCParsedAsmOperand {
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public:
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private:
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enum OperandKind {
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KindInvalid,
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KindToken,
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KindReg,
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KindAccessReg,
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KindImm,
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KindMem
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};
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OperandKind Kind;
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SMLoc StartLoc, EndLoc;
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// A string of length Length, starting at Data.
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struct TokenOp {
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const char *Data;
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unsigned Length;
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};
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// LLVM register Num, which has kind Kind. In some ways it might be
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// easier for this class to have a register bank (general, floating-point
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// or access) and a raw register number (0-15). This would postpone the
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// interpretation of the operand to the add*() methods and avoid the need
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// for context-dependent parsing. However, we do things the current way
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// because of the virtual getReg() method, which needs to distinguish
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// between (say) %r0 used as a single register and %r0 used as a pair.
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// Context-dependent parsing can also give us slightly better error
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// messages when invalid pairs like %r1 are used.
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struct RegOp {
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RegisterKind Kind;
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unsigned Num;
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};
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// Base + Disp + Index, where Base and Index are LLVM registers or 0.
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// RegKind says what type the registers have (ADDR32Reg or ADDR64Reg).
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// Length is the operand length for D(L,B)-style operands, otherwise
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// it is null.
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struct MemOp {
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unsigned Base : 8;
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unsigned Index : 8;
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unsigned RegKind : 8;
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unsigned Unused : 8;
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const MCExpr *Disp;
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const MCExpr *Length;
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};
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union {
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TokenOp Token;
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RegOp Reg;
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unsigned AccessReg;
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const MCExpr *Imm;
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MemOp Mem;
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};
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SystemZOperand(OperandKind kind, SMLoc startLoc, SMLoc endLoc)
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: Kind(kind), StartLoc(startLoc), EndLoc(endLoc)
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{}
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void addExpr(MCInst &Inst, const MCExpr *Expr) const {
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// Add as immediates when possible. Null MCExpr = 0.
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if (Expr == 0)
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Inst.addOperand(MCOperand::CreateImm(0));
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else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
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Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
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else
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Inst.addOperand(MCOperand::CreateExpr(Expr));
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}
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public:
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// Create particular kinds of operand.
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static SystemZOperand *createInvalid(SMLoc StartLoc, SMLoc EndLoc) {
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return new SystemZOperand(KindInvalid, StartLoc, EndLoc);
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}
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static SystemZOperand *createToken(StringRef Str, SMLoc Loc) {
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SystemZOperand *Op = new SystemZOperand(KindToken, Loc, Loc);
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Op->Token.Data = Str.data();
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Op->Token.Length = Str.size();
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return Op;
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}
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static SystemZOperand *createReg(RegisterKind Kind, unsigned Num,
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SMLoc StartLoc, SMLoc EndLoc) {
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SystemZOperand *Op = new SystemZOperand(KindReg, StartLoc, EndLoc);
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Op->Reg.Kind = Kind;
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Op->Reg.Num = Num;
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return Op;
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}
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static SystemZOperand *createAccessReg(unsigned Num, SMLoc StartLoc,
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SMLoc EndLoc) {
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SystemZOperand *Op = new SystemZOperand(KindAccessReg, StartLoc, EndLoc);
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Op->AccessReg = Num;
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return Op;
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}
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static SystemZOperand *createImm(const MCExpr *Expr, SMLoc StartLoc,
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SMLoc EndLoc) {
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SystemZOperand *Op = new SystemZOperand(KindImm, StartLoc, EndLoc);
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Op->Imm = Expr;
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return Op;
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}
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static SystemZOperand *createMem(RegisterKind RegKind, unsigned Base,
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const MCExpr *Disp, unsigned Index,
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const MCExpr *Length, SMLoc StartLoc,
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SMLoc EndLoc) {
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SystemZOperand *Op = new SystemZOperand(KindMem, StartLoc, EndLoc);
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Op->Mem.RegKind = RegKind;
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Op->Mem.Base = Base;
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Op->Mem.Index = Index;
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Op->Mem.Disp = Disp;
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Op->Mem.Length = Length;
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return Op;
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}
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// Token operands
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virtual bool isToken() const LLVM_OVERRIDE {
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return Kind == KindToken;
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}
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StringRef getToken() const {
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assert(Kind == KindToken && "Not a token");
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return StringRef(Token.Data, Token.Length);
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}
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// Register operands.
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virtual bool isReg() const LLVM_OVERRIDE {
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return Kind == KindReg;
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}
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bool isReg(RegisterKind RegKind) const {
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return Kind == KindReg && Reg.Kind == RegKind;
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}
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virtual unsigned getReg() const LLVM_OVERRIDE {
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assert(Kind == KindReg && "Not a register");
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return Reg.Num;
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}
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// Access register operands. Access registers aren't exposed to LLVM
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// as registers.
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bool isAccessReg() const {
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return Kind == KindAccessReg;
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}
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// Immediate operands.
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virtual bool isImm() const LLVM_OVERRIDE {
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return Kind == KindImm;
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}
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bool isImm(int64_t MinValue, int64_t MaxValue) const {
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return Kind == KindImm && inRange(Imm, MinValue, MaxValue);
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}
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const MCExpr *getImm() const {
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assert(Kind == KindImm && "Not an immediate");
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return Imm;
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}
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// Memory operands.
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virtual bool isMem() const LLVM_OVERRIDE {
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return Kind == KindMem;
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}
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bool isMem(RegisterKind RegKind, MemoryKind MemKind) const {
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return (Kind == KindMem &&
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Mem.RegKind == RegKind &&
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(MemKind == BDXMem || !Mem.Index) &&
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(MemKind == BDLMem) == (Mem.Length != 0));
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}
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bool isMemDisp12(RegisterKind RegKind, MemoryKind MemKind) const {
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return isMem(RegKind, MemKind) && inRange(Mem.Disp, 0, 0xfff);
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}
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bool isMemDisp20(RegisterKind RegKind, MemoryKind MemKind) const {
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return isMem(RegKind, MemKind) && inRange(Mem.Disp, -524288, 524287);
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}
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bool isMemDisp12Len8(RegisterKind RegKind) const {
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return isMemDisp12(RegKind, BDLMem) && inRange(Mem.Length, 1, 0x100);
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}
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// Override MCParsedAsmOperand.
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virtual SMLoc getStartLoc() const LLVM_OVERRIDE { return StartLoc; }
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virtual SMLoc getEndLoc() const LLVM_OVERRIDE { return EndLoc; }
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virtual void print(raw_ostream &OS) const LLVM_OVERRIDE;
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// Used by the TableGen code to add particular types of operand
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// to an instruction.
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void addRegOperands(MCInst &Inst, unsigned N) const {
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assert(N == 1 && "Invalid number of operands");
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Inst.addOperand(MCOperand::CreateReg(getReg()));
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}
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void addAccessRegOperands(MCInst &Inst, unsigned N) const {
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assert(N == 1 && "Invalid number of operands");
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assert(Kind == KindAccessReg && "Invalid operand type");
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Inst.addOperand(MCOperand::CreateImm(AccessReg));
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}
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void addImmOperands(MCInst &Inst, unsigned N) const {
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assert(N == 1 && "Invalid number of operands");
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addExpr(Inst, getImm());
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}
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void addBDAddrOperands(MCInst &Inst, unsigned N) const {
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assert(N == 2 && "Invalid number of operands");
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assert(Kind == KindMem && Mem.Index == 0 && "Invalid operand type");
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Inst.addOperand(MCOperand::CreateReg(Mem.Base));
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addExpr(Inst, Mem.Disp);
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}
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void addBDXAddrOperands(MCInst &Inst, unsigned N) const {
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assert(N == 3 && "Invalid number of operands");
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assert(Kind == KindMem && "Invalid operand type");
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Inst.addOperand(MCOperand::CreateReg(Mem.Base));
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addExpr(Inst, Mem.Disp);
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Inst.addOperand(MCOperand::CreateReg(Mem.Index));
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}
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void addBDLAddrOperands(MCInst &Inst, unsigned N) const {
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assert(N == 3 && "Invalid number of operands");
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assert(Kind == KindMem && "Invalid operand type");
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Inst.addOperand(MCOperand::CreateReg(Mem.Base));
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addExpr(Inst, Mem.Disp);
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addExpr(Inst, Mem.Length);
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}
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// Used by the TableGen code to check for particular operand types.
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bool isGR32() const { return isReg(GR32Reg); }
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bool isGRH32() const { return isReg(GRH32Reg); }
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bool isGRX32() const { return false; }
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bool isGR64() const { return isReg(GR64Reg); }
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bool isGR128() const { return isReg(GR128Reg); }
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bool isADDR32() const { return isReg(ADDR32Reg); }
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bool isADDR64() const { return isReg(ADDR64Reg); }
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bool isADDR128() const { return false; }
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bool isFP32() const { return isReg(FP32Reg); }
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bool isFP64() const { return isReg(FP64Reg); }
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bool isFP128() const { return isReg(FP128Reg); }
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bool isBDAddr32Disp12() const { return isMemDisp12(ADDR32Reg, BDMem); }
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bool isBDAddr32Disp20() const { return isMemDisp20(ADDR32Reg, BDMem); }
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bool isBDAddr64Disp12() const { return isMemDisp12(ADDR64Reg, BDMem); }
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bool isBDAddr64Disp20() const { return isMemDisp20(ADDR64Reg, BDMem); }
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bool isBDXAddr64Disp12() const { return isMemDisp12(ADDR64Reg, BDXMem); }
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bool isBDXAddr64Disp20() const { return isMemDisp20(ADDR64Reg, BDXMem); }
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bool isBDLAddr64Disp12Len8() const { return isMemDisp12Len8(ADDR64Reg); }
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bool isU4Imm() const { return isImm(0, 15); }
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bool isU6Imm() const { return isImm(0, 63); }
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bool isU8Imm() const { return isImm(0, 255); }
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bool isS8Imm() const { return isImm(-128, 127); }
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bool isU16Imm() const { return isImm(0, 65535); }
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bool isS16Imm() const { return isImm(-32768, 32767); }
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bool isU32Imm() const { return isImm(0, (1LL << 32) - 1); }
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bool isS32Imm() const { return isImm(-(1LL << 31), (1LL << 31) - 1); }
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};
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class SystemZAsmParser : public MCTargetAsmParser {
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#define GET_ASSEMBLER_HEADER
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#include "SystemZGenAsmMatcher.inc"
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private:
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MCSubtargetInfo &STI;
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MCAsmParser &Parser;
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enum RegisterGroup {
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RegGR,
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RegFP,
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RegAccess
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};
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struct Register {
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RegisterGroup Group;
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unsigned Num;
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SMLoc StartLoc, EndLoc;
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};
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bool parseRegister(Register &Reg);
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bool parseRegister(Register &Reg, RegisterGroup Group, const unsigned *Regs,
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bool IsAddress = false);
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OperandMatchResultTy
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parseRegister(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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RegisterGroup Group, const unsigned *Regs, RegisterKind Kind);
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bool parseAddress(unsigned &Base, const MCExpr *&Disp,
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unsigned &Index, const MCExpr *&Length,
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const unsigned *Regs, RegisterKind RegKind);
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OperandMatchResultTy
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parseAddress(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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const unsigned *Regs, RegisterKind RegKind,
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MemoryKind MemKind);
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bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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StringRef Mnemonic);
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public:
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SystemZAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
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const MCInstrInfo &MII)
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: MCTargetAsmParser(), STI(sti), Parser(parser) {
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MCAsmParserExtension::Initialize(Parser);
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// Initialize the set of available features.
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setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
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}
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// Override MCTargetAsmParser.
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virtual bool ParseDirective(AsmToken DirectiveID) LLVM_OVERRIDE;
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virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
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SMLoc &EndLoc) LLVM_OVERRIDE;
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virtual bool ParseInstruction(ParseInstructionInfo &Info,
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StringRef Name, SMLoc NameLoc,
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SmallVectorImpl<MCParsedAsmOperand*> &Operands)
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LLVM_OVERRIDE;
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virtual bool
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MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
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SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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MCStreamer &Out, unsigned &ErrorInfo,
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bool MatchingInlineAsm) LLVM_OVERRIDE;
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// Used by the TableGen code to parse particular operand types.
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OperandMatchResultTy
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parseGR32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GR32Regs, GR32Reg);
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}
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OperandMatchResultTy
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parseGRH32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GRH32Regs, GRH32Reg);
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}
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OperandMatchResultTy
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parseGRX32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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llvm_unreachable("GRX32 should only be used for pseudo instructions");
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}
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OperandMatchResultTy
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parseGR64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GR64Regs, GR64Reg);
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}
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OperandMatchResultTy
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parseGR128(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GR128Regs, GR128Reg);
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}
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OperandMatchResultTy
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parseADDR32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GR32Regs, ADDR32Reg);
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}
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OperandMatchResultTy
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parseADDR64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegGR, SystemZMC::GR64Regs, ADDR64Reg);
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}
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OperandMatchResultTy
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parseADDR128(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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llvm_unreachable("Shouldn't be used as an operand");
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}
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OperandMatchResultTy
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parseFP32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegFP, SystemZMC::FP32Regs, FP32Reg);
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}
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OperandMatchResultTy
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parseFP64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegFP, SystemZMC::FP64Regs, FP64Reg);
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}
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OperandMatchResultTy
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parseFP128(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseRegister(Operands, RegFP, SystemZMC::FP128Regs, FP128Reg);
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}
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OperandMatchResultTy
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parseBDAddr32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseAddress(Operands, SystemZMC::GR32Regs, ADDR32Reg, BDMem);
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}
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OperandMatchResultTy
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parseBDAddr64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseAddress(Operands, SystemZMC::GR64Regs, ADDR64Reg, BDMem);
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}
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OperandMatchResultTy
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parseBDXAddr64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseAddress(Operands, SystemZMC::GR64Regs, ADDR64Reg, BDXMem);
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}
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OperandMatchResultTy
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parseBDLAddr64(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parseAddress(Operands, SystemZMC::GR64Regs, ADDR64Reg, BDLMem);
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}
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OperandMatchResultTy
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parseAccessReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
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OperandMatchResultTy
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parsePCRel(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
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int64_t MinVal, int64_t MaxVal);
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OperandMatchResultTy
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parsePCRel16(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parsePCRel(Operands, -(1LL << 16), (1LL << 16) - 1);
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}
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OperandMatchResultTy
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parsePCRel32(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
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return parsePCRel(Operands, -(1LL << 32), (1LL << 32) - 1);
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}
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};
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}
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#define GET_REGISTER_MATCHER
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#define GET_SUBTARGET_FEATURE_NAME
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#define GET_MATCHER_IMPLEMENTATION
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#include "SystemZGenAsmMatcher.inc"
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void SystemZOperand::print(raw_ostream &OS) const {
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llvm_unreachable("Not implemented");
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}
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// Parse one register of the form %<prefix><number>.
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bool SystemZAsmParser::parseRegister(Register &Reg) {
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Reg.StartLoc = Parser.getTok().getLoc();
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// Eat the % prefix.
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if (Parser.getTok().isNot(AsmToken::Percent))
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return Error(Parser.getTok().getLoc(), "register expected");
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Parser.Lex();
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// Expect a register name.
|
|
if (Parser.getTok().isNot(AsmToken::Identifier))
|
|
return Error(Reg.StartLoc, "invalid register");
|
|
|
|
// Check that there's a prefix.
|
|
StringRef Name = Parser.getTok().getString();
|
|
if (Name.size() < 2)
|
|
return Error(Reg.StartLoc, "invalid register");
|
|
char Prefix = Name[0];
|
|
|
|
// Treat the rest of the register name as a register number.
|
|
if (Name.substr(1).getAsInteger(10, Reg.Num))
|
|
return Error(Reg.StartLoc, "invalid register");
|
|
|
|
// Look for valid combinations of prefix and number.
|
|
if (Prefix == 'r' && Reg.Num < 16)
|
|
Reg.Group = RegGR;
|
|
else if (Prefix == 'f' && Reg.Num < 16)
|
|
Reg.Group = RegFP;
|
|
else if (Prefix == 'a' && Reg.Num < 16)
|
|
Reg.Group = RegAccess;
|
|
else
|
|
return Error(Reg.StartLoc, "invalid register");
|
|
|
|
Reg.EndLoc = Parser.getTok().getLoc();
|
|
Parser.Lex();
|
|
return false;
|
|
}
|
|
|
|
// Parse a register of group Group. If Regs is nonnull, use it to map
|
|
// the raw register number to LLVM numbering, with zero entries indicating
|
|
// an invalid register. IsAddress says whether the register appears in an
|
|
// address context.
|
|
bool SystemZAsmParser::parseRegister(Register &Reg, RegisterGroup Group,
|
|
const unsigned *Regs, bool IsAddress) {
|
|
if (parseRegister(Reg))
|
|
return true;
|
|
if (Reg.Group != Group)
|
|
return Error(Reg.StartLoc, "invalid operand for instruction");
|
|
if (Regs && Regs[Reg.Num] == 0)
|
|
return Error(Reg.StartLoc, "invalid register pair");
|
|
if (Reg.Num == 0 && IsAddress)
|
|
return Error(Reg.StartLoc, "%r0 used in an address");
|
|
if (Regs)
|
|
Reg.Num = Regs[Reg.Num];
|
|
return false;
|
|
}
|
|
|
|
// Parse a register and add it to Operands. The other arguments are as above.
|
|
SystemZAsmParser::OperandMatchResultTy
|
|
SystemZAsmParser::parseRegister(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
RegisterGroup Group, const unsigned *Regs,
|
|
RegisterKind Kind) {
|
|
if (Parser.getTok().isNot(AsmToken::Percent))
|
|
return MatchOperand_NoMatch;
|
|
|
|
Register Reg;
|
|
bool IsAddress = (Kind == ADDR32Reg || Kind == ADDR64Reg);
|
|
if (parseRegister(Reg, Group, Regs, IsAddress))
|
|
return MatchOperand_ParseFail;
|
|
|
|
Operands.push_back(SystemZOperand::createReg(Kind, Reg.Num,
|
|
Reg.StartLoc, Reg.EndLoc));
|
|
return MatchOperand_Success;
|
|
}
|
|
|
|
// Parse a memory operand into Base, Disp, Index and Length.
|
|
// Regs maps asm register numbers to LLVM register numbers and RegKind
|
|
// says what kind of address register we're using (ADDR32Reg or ADDR64Reg).
|
|
bool SystemZAsmParser::parseAddress(unsigned &Base, const MCExpr *&Disp,
|
|
unsigned &Index, const MCExpr *&Length,
|
|
const unsigned *Regs,
|
|
RegisterKind RegKind) {
|
|
// Parse the displacement, which must always be present.
|
|
if (getParser().parseExpression(Disp))
|
|
return true;
|
|
|
|
// Parse the optional base and index.
|
|
Index = 0;
|
|
Base = 0;
|
|
Length = 0;
|
|
if (getLexer().is(AsmToken::LParen)) {
|
|
Parser.Lex();
|
|
|
|
if (getLexer().is(AsmToken::Percent)) {
|
|
// Parse the first register and decide whether it's a base or an index.
|
|
Register Reg;
|
|
if (parseRegister(Reg, RegGR, Regs, RegKind))
|
|
return true;
|
|
if (getLexer().is(AsmToken::Comma))
|
|
Index = Reg.Num;
|
|
else
|
|
Base = Reg.Num;
|
|
} else {
|
|
// Parse the length.
|
|
if (getParser().parseExpression(Length))
|
|
return true;
|
|
}
|
|
|
|
// Check whether there's a second register. It's the base if so.
|
|
if (getLexer().is(AsmToken::Comma)) {
|
|
Parser.Lex();
|
|
Register Reg;
|
|
if (parseRegister(Reg, RegGR, Regs, RegKind))
|
|
return true;
|
|
Base = Reg.Num;
|
|
}
|
|
|
|
// Consume the closing bracket.
|
|
if (getLexer().isNot(AsmToken::RParen))
|
|
return Error(Parser.getTok().getLoc(), "unexpected token in address");
|
|
Parser.Lex();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Parse a memory operand and add it to Operands. The other arguments
|
|
// are as above.
|
|
SystemZAsmParser::OperandMatchResultTy
|
|
SystemZAsmParser::parseAddress(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
const unsigned *Regs, RegisterKind RegKind,
|
|
MemoryKind MemKind) {
|
|
SMLoc StartLoc = Parser.getTok().getLoc();
|
|
unsigned Base, Index;
|
|
const MCExpr *Disp;
|
|
const MCExpr *Length;
|
|
if (parseAddress(Base, Disp, Index, Length, Regs, RegKind))
|
|
return MatchOperand_ParseFail;
|
|
|
|
if (Index && MemKind != BDXMem)
|
|
{
|
|
Error(StartLoc, "invalid use of indexed addressing");
|
|
return MatchOperand_ParseFail;
|
|
}
|
|
|
|
if (Length && MemKind != BDLMem)
|
|
{
|
|
Error(StartLoc, "invalid use of length addressing");
|
|
return MatchOperand_ParseFail;
|
|
}
|
|
|
|
if (!Length && MemKind == BDLMem)
|
|
{
|
|
Error(StartLoc, "missing length in address");
|
|
return MatchOperand_ParseFail;
|
|
}
|
|
|
|
SMLoc EndLoc =
|
|
SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
|
|
Operands.push_back(SystemZOperand::createMem(RegKind, Base, Disp, Index,
|
|
Length, StartLoc, EndLoc));
|
|
return MatchOperand_Success;
|
|
}
|
|
|
|
bool SystemZAsmParser::ParseDirective(AsmToken DirectiveID) {
|
|
return true;
|
|
}
|
|
|
|
bool SystemZAsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
|
|
SMLoc &EndLoc) {
|
|
Register Reg;
|
|
if (parseRegister(Reg))
|
|
return true;
|
|
if (Reg.Group == RegGR)
|
|
RegNo = SystemZMC::GR64Regs[Reg.Num];
|
|
else if (Reg.Group == RegFP)
|
|
RegNo = SystemZMC::FP64Regs[Reg.Num];
|
|
else
|
|
// FIXME: Access registers aren't modelled as LLVM registers yet.
|
|
return Error(Reg.StartLoc, "invalid operand for instruction");
|
|
StartLoc = Reg.StartLoc;
|
|
EndLoc = Reg.EndLoc;
|
|
return false;
|
|
}
|
|
|
|
bool SystemZAsmParser::
|
|
ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
|
|
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
|
|
Operands.push_back(SystemZOperand::createToken(Name, NameLoc));
|
|
|
|
// Read the remaining operands.
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
// Read the first operand.
|
|
if (parseOperand(Operands, Name)) {
|
|
Parser.eatToEndOfStatement();
|
|
return true;
|
|
}
|
|
|
|
// Read any subsequent operands.
|
|
while (getLexer().is(AsmToken::Comma)) {
|
|
Parser.Lex();
|
|
if (parseOperand(Operands, Name)) {
|
|
Parser.eatToEndOfStatement();
|
|
return true;
|
|
}
|
|
}
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
SMLoc Loc = getLexer().getLoc();
|
|
Parser.eatToEndOfStatement();
|
|
return Error(Loc, "unexpected token in argument list");
|
|
}
|
|
}
|
|
|
|
// Consume the EndOfStatement.
|
|
Parser.Lex();
|
|
return false;
|
|
}
|
|
|
|
bool SystemZAsmParser::
|
|
parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
StringRef Mnemonic) {
|
|
// Check if the current operand has a custom associated parser, if so, try to
|
|
// custom parse the operand, or fallback to the general approach.
|
|
OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
|
|
if (ResTy == MatchOperand_Success)
|
|
return false;
|
|
|
|
// If there wasn't a custom match, try the generic matcher below. Otherwise,
|
|
// there was a match, but an error occurred, in which case, just return that
|
|
// the operand parsing failed.
|
|
if (ResTy == MatchOperand_ParseFail)
|
|
return true;
|
|
|
|
// Check for a register. All real register operands should have used
|
|
// a context-dependent parse routine, which gives the required register
|
|
// class. The code is here to mop up other cases, like those where
|
|
// the instruction isn't recognized.
|
|
if (Parser.getTok().is(AsmToken::Percent)) {
|
|
Register Reg;
|
|
if (parseRegister(Reg))
|
|
return true;
|
|
Operands.push_back(SystemZOperand::createInvalid(Reg.StartLoc, Reg.EndLoc));
|
|
return false;
|
|
}
|
|
|
|
// The only other type of operand is an immediate or address. As above,
|
|
// real address operands should have used a context-dependent parse routine,
|
|
// so we treat any plain expression as an immediate.
|
|
SMLoc StartLoc = Parser.getTok().getLoc();
|
|
unsigned Base, Index;
|
|
const MCExpr *Expr, *Length;
|
|
if (parseAddress(Base, Expr, Index, Length, SystemZMC::GR64Regs, ADDR64Reg))
|
|
return true;
|
|
|
|
SMLoc EndLoc =
|
|
SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
|
|
if (Base || Index || Length)
|
|
Operands.push_back(SystemZOperand::createInvalid(StartLoc, EndLoc));
|
|
else
|
|
Operands.push_back(SystemZOperand::createImm(Expr, StartLoc, EndLoc));
|
|
return false;
|
|
}
|
|
|
|
bool SystemZAsmParser::
|
|
MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
|
|
SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
MCStreamer &Out, unsigned &ErrorInfo,
|
|
bool MatchingInlineAsm) {
|
|
MCInst Inst;
|
|
unsigned MatchResult;
|
|
|
|
MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo,
|
|
MatchingInlineAsm);
|
|
switch (MatchResult) {
|
|
default: break;
|
|
case Match_Success:
|
|
Inst.setLoc(IDLoc);
|
|
Out.EmitInstruction(Inst);
|
|
return false;
|
|
|
|
case Match_MissingFeature: {
|
|
assert(ErrorInfo && "Unknown missing feature!");
|
|
// Special case the error message for the very common case where only
|
|
// a single subtarget feature is missing
|
|
std::string Msg = "instruction requires:";
|
|
unsigned Mask = 1;
|
|
for (unsigned I = 0; I < sizeof(ErrorInfo) * 8 - 1; ++I) {
|
|
if (ErrorInfo & Mask) {
|
|
Msg += " ";
|
|
Msg += getSubtargetFeatureName(ErrorInfo & Mask);
|
|
}
|
|
Mask <<= 1;
|
|
}
|
|
return Error(IDLoc, Msg);
|
|
}
|
|
|
|
case Match_InvalidOperand: {
|
|
SMLoc ErrorLoc = IDLoc;
|
|
if (ErrorInfo != ~0U) {
|
|
if (ErrorInfo >= Operands.size())
|
|
return Error(IDLoc, "too few operands for instruction");
|
|
|
|
ErrorLoc = ((SystemZOperand*)Operands[ErrorInfo])->getStartLoc();
|
|
if (ErrorLoc == SMLoc())
|
|
ErrorLoc = IDLoc;
|
|
}
|
|
return Error(ErrorLoc, "invalid operand for instruction");
|
|
}
|
|
|
|
case Match_MnemonicFail:
|
|
return Error(IDLoc, "invalid instruction");
|
|
}
|
|
|
|
llvm_unreachable("Unexpected match type");
|
|
}
|
|
|
|
SystemZAsmParser::OperandMatchResultTy SystemZAsmParser::
|
|
parseAccessReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
|
|
if (Parser.getTok().isNot(AsmToken::Percent))
|
|
return MatchOperand_NoMatch;
|
|
|
|
Register Reg;
|
|
if (parseRegister(Reg, RegAccess, 0))
|
|
return MatchOperand_ParseFail;
|
|
|
|
Operands.push_back(SystemZOperand::createAccessReg(Reg.Num,
|
|
Reg.StartLoc,
|
|
Reg.EndLoc));
|
|
return MatchOperand_Success;
|
|
}
|
|
|
|
SystemZAsmParser::OperandMatchResultTy SystemZAsmParser::
|
|
parsePCRel(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
|
|
int64_t MinVal, int64_t MaxVal) {
|
|
MCContext &Ctx = getContext();
|
|
MCStreamer &Out = getStreamer();
|
|
const MCExpr *Expr;
|
|
SMLoc StartLoc = Parser.getTok().getLoc();
|
|
if (getParser().parseExpression(Expr))
|
|
return MatchOperand_NoMatch;
|
|
|
|
// For consistency with the GNU assembler, treat immediates as offsets
|
|
// from ".".
|
|
if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr)) {
|
|
int64_t Value = CE->getValue();
|
|
if ((Value & 1) || Value < MinVal || Value > MaxVal) {
|
|
Error(StartLoc, "offset out of range");
|
|
return MatchOperand_ParseFail;
|
|
}
|
|
MCSymbol *Sym = Ctx.CreateTempSymbol();
|
|
Out.EmitLabel(Sym);
|
|
const MCExpr *Base = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
|
|
Ctx);
|
|
Expr = Value == 0 ? Base : MCBinaryExpr::CreateAdd(Base, Expr, Ctx);
|
|
}
|
|
|
|
SMLoc EndLoc =
|
|
SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
|
|
Operands.push_back(SystemZOperand::createImm(Expr, StartLoc, EndLoc));
|
|
return MatchOperand_Success;
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeSystemZAsmParser() {
|
|
RegisterMCAsmParser<SystemZAsmParser> X(TheSystemZTarget);
|
|
}
|