class RegisterClass; // Forward def
+// SubRegIndex - Use instances of SubRegIndex to identify subregisters.
+class SubRegIndex {
+ string Namespace = "";
+}
+
// Register - You should define one instance of this class for each register
// in the target machine. String n will become the "name" of the register.
class Register<string n> {
// not [AX, AH, AL].
list<Register> SubRegs = [];
+ // SubRegIndices - For each register in SubRegs, specify the SubRegIndex used
+ // to address it. Sub-sub-register indices are automatically inherited from
+ // SubRegs.
+ list<SubRegIndex> SubRegIndices = [];
+
+ // CompositeIndices - Specify subreg indices that don't correspond directly to
+ // a register in SubRegs and are not inherited. The following formats are
+ // supported:
+ //
+ // (a) Identity - Reg:a == Reg
+ // (a b) Alias - Reg:a == Reg:b
+ // (a b,c) Composite - Reg:a == (Reg:b):c
+ //
+ // This can be used to disambiguate a sub-sub-register that exists in more
+ // than one subregister and other weird stuff.
+ list<dag> CompositeIndices = [];
+
// DwarfNumbers - Numbers used internally by gcc/gdb to identify the register.
// These values can be determined by locating the <target>.h file in the
// directory llvmgcc/gcc/config/<target>/ and looking for REGISTER_NAMES. The
let SubRegs = subregs;
}
-// SubRegSet - This can be used to define a specific mapping of registers to
-// indices, for use as named subregs of a particular physical register. Each
-// register in 'subregs' becomes an addressable subregister at index 'n' of the
-// corresponding register in 'regs'.
-class SubRegSet<int n, list<Register> regs, list<Register> subregs> {
- int index = n;
-
- list<Register> From = regs;
- list<Register> To = subregs;
-}
-
// RegisterClass - Now that all of the registers are defined, and aliases
// between registers are defined, specify which registers belong to which
// register classes. This also defines the default allocation order of
//
list<Register> MemberList = regList;
- // SubClassList - Specify which register classes correspond to subregisters
- // of this class. The order should be by subregister set index.
- list<RegisterClass> SubRegClassList = [];
+ // SubRegClasses - Specify the register class of subregisters as a list of
+ // dags: (RegClass SubRegIndex, SubRegindex, ...)
+ list<dag> SubRegClasses = [];
// MethodProtos/MethodBodies - These members can be used to insert arbitrary
// code into a generated register class. The normal usage of this is to
//===----------------------------------------------------------------------===//
// DwarfRegNum - This class provides a mapping of the llvm register enumeration
// to the register numbering used by gcc and gdb. These values are used by a
-// debug information writer (ex. DwarfWriter) to describe where values may be
-// located during execution.
+// debug information writer to describe where values may be located during
+// execution.
class DwarfRegNum<list<int> Numbers> {
// DwarfNumbers - Numbers used internally by gcc/gdb to identify the register.
// These values can be determined by locating the <target>.h file in the
bit isReMaterializable = 0; // Is this instruction re-materializable?
bit isPredicable = 0; // Is this instruction predicable?
bit hasDelaySlot = 0; // Does this instruction have an delay slot?
- bit usesCustomDAGSchedInserter = 0; // Pseudo instr needing special help.
+ bit usesCustomInserter = 0; // Pseudo instr needing special help.
bit hasCtrlDep = 0; // Does this instruction r/w ctrl-flow chains?
bit isNotDuplicable = 0; // Is it unsafe to duplicate this instruction?
bit isAsCheapAsAMove = 0; // As cheap (or cheaper) than a move instruction.
+ bit hasExtraSrcRegAllocReq = 0; // Sources have special regalloc requirement?
+ bit hasExtraDefRegAllocReq = 0; // Defs have special regalloc requirement?
// Side effect flags - When set, the flags have these meanings:
//
// hasSideEffects - The instruction has side effects that are not
// captured by any operands of the instruction or other flags.
//
- // mayHaveSideEffects - Some instances of the instruction can have side
- // effects. The virtual method "isReallySideEffectFree" is called to
- // determine this. Load instructions are an example of where this is
- // useful. In general, loads always have side effects. However, loads from
- // constant pools don't. Individual back ends make this determination.
- //
// neverHasSideEffects - Set on an instruction with no pattern if it has no
// side effects.
bit hasSideEffects = 0;
- bit mayHaveSideEffects = 0;
bit neverHasSideEffects = 0;
+ // Is this instruction a "real" instruction (with a distinct machine
+ // encoding), or is it a pseudo instruction used for codegen modeling
+ // purposes.
+ bit isCodeGenOnly = 0;
+
+ // Is this instruction a pseudo instruction for use by the assembler parser.
+ bit isAsmParserOnly = 0;
+
InstrItinClass Itinerary = NoItinerary;// Execution steps used for scheduling.
string Constraints = ""; // OperandConstraint, e.g. $src = $dst.
-
+
/// DisableEncoding - List of operand names (e.g. "$op1,$op2") that should not
/// be encoded into the output machineinstr.
string DisableEncoding = "";
+
+ /// Target-specific flags. This becomes the TSFlags field in TargetInstrDesc.
+ bits<64> TSFlags = 0;
}
/// Predicates - These are extra conditionals which are turned into instruction
/// it to be resolved by inference in the context it is used.
def unknown;
+/// AsmOperandClass - Representation for the kinds of operands which the target
+/// specific parser can create and the assembly matcher may need to distinguish.
+///
+/// Operand classes are used to define the order in which instructions are
+/// matched, to ensure that the instruction which gets matched for any
+/// particular list of operands is deterministic.
+///
+/// The target specific parser must be able to classify a parsed operand into a
+/// unique class which does not partially overlap with any other classes. It can
+/// match a subset of some other class, in which case the super class field
+/// should be defined.
+class AsmOperandClass {
+ /// The name to use for this class, which should be usable as an enum value.
+ string Name = ?;
+
+ /// The super classes of this operand.
+ list<AsmOperandClass> SuperClasses = [];
+
+ /// The name of the method on the target specific operand to call to test
+ /// whether the operand is an instance of this class. If not set, this will
+ /// default to "isFoo", where Foo is the AsmOperandClass name. The method
+ /// signature should be:
+ /// bool isFoo() const;
+ string PredicateMethod = ?;
+
+ /// The name of the method on the target specific operand to call to add the
+ /// target specific operand to an MCInst. If not set, this will default to
+ /// "addFooOperands", where Foo is the AsmOperandClass name. The method
+ /// signature should be:
+ /// void addFooOperands(MCInst &Inst, unsigned N) const;
+ string RenderMethod = ?;
+}
+
+def ImmAsmOperand : AsmOperandClass {
+ let Name = "Imm";
+}
+
/// Operand Types - These provide the built-in operand types that may be used
/// by a target. Targets can optionally provide their own operand types as
/// needed, though this should not be needed for RISC targets.
// ParserMatchClass - The "match class" that operands of this type fit
// in. Match classes are used to define the order in which instructions are
// match, to ensure that which instructions gets matched is deterministic.
- string ParserMatchClass = "Imm";
-
- // ParserMatchSuperClass - The enclosing super class for this operand (if
- // any). This operand *must* be a subset of the valid operands for the super
- // class; i.e., the match predicate for this super class must return true
- // for all instances of this class.
- string ParserMatchSuperClass = ?;
+ //
+ // The target specific parser must be able to classify an parsed operand into
+ // a unique class, which does not partially overlap with any other classes. It
+ // can match a subset of some other class, in which case the AsmOperandClass
+ // should declare the other operand as one of its super classes.
+ AsmOperandClass ParserMatchClass = ImmAsmOperand;
}
def i1imm : Operand<i1>;
// InstrInfo - This class should only be instantiated once to provide parameters
-// which are global to the the target machine.
+// which are global to the target machine.
//
class InstrInfo {
- // If the target wants to associate some target-specific information with each
- // instruction, it should provide these two lists to indicate how to assemble
- // the target specific information into the 32 bits available.
- //
- list<string> TSFlagsFields = [];
- list<int> TSFlagsShifts = [];
-
// Target can specify its instructions in either big or little-endian formats.
// For instance, while both Sparc and PowerPC are big-endian platforms, the
// Sparc manual specifies its instructions in the format [31..0] (big), while
bit isLittleEndianEncoding = 0;
}
-// Standard Instructions.
+// Standard Pseudo Instructions.
+let isCodeGenOnly = 1 in {
def PHI : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops variable_ops);
+ let OutOperandList = (outs);
+ let InOperandList = (ins variable_ops);
let AsmString = "PHINODE";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
}
def INLINEASM : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops variable_ops);
+ let OutOperandList = (outs);
+ let InOperandList = (ins variable_ops);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
}
def DBG_LABEL : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops i32imm:$id);
+ let OutOperandList = (outs);
+ let InOperandList = (ins i32imm:$id);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let hasCtrlDep = 1;
+ let isNotDuplicable = 1;
}
def EH_LABEL : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops i32imm:$id);
+ let OutOperandList = (outs);
+ let InOperandList = (ins i32imm:$id);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let hasCtrlDep = 1;
+ let isNotDuplicable = 1;
}
def GC_LABEL : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops i32imm:$id);
+ let OutOperandList = (outs);
+ let InOperandList = (ins i32imm:$id);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let hasCtrlDep = 1;
+ let isNotDuplicable = 1;
}
-def DECLARE : Instruction {
- let OutOperandList = (ops);
- let InOperandList = (ops variable_ops);
+def KILL : Instruction {
+ let OutOperandList = (outs);
+ let InOperandList = (ins variable_ops);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
- let hasCtrlDep = 1;
+ let Namespace = "TargetOpcode";
+ let neverHasSideEffects = 1;
}
def EXTRACT_SUBREG : Instruction {
- let OutOperandList = (ops unknown:$dst);
- let InOperandList = (ops unknown:$supersrc, i32imm:$subidx);
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins unknown:$supersrc, i32imm:$subidx);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let neverHasSideEffects = 1;
}
def INSERT_SUBREG : Instruction {
- let OutOperandList = (ops unknown:$dst);
- let InOperandList = (ops unknown:$supersrc, unknown:$subsrc, i32imm:$subidx);
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins unknown:$supersrc, unknown:$subsrc, i32imm:$subidx);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let neverHasSideEffects = 1;
let Constraints = "$supersrc = $dst";
}
def IMPLICIT_DEF : Instruction {
- let OutOperandList = (ops unknown:$dst);
- let InOperandList = (ops);
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let neverHasSideEffects = 1;
let isReMaterializable = 1;
let isAsCheapAsAMove = 1;
}
def SUBREG_TO_REG : Instruction {
- let OutOperandList = (ops unknown:$dst);
- let InOperandList = (ops unknown:$implsrc, unknown:$subsrc, i32imm:$subidx);
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins unknown:$implsrc, unknown:$subsrc, i32imm:$subidx);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let neverHasSideEffects = 1;
}
def COPY_TO_REGCLASS : Instruction {
- let OutOperandList = (ops unknown:$dst);
- let InOperandList = (ops unknown:$src, i32imm:$regclass);
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins unknown:$src, i32imm:$regclass);
+ let AsmString = "";
+ let Namespace = "TargetOpcode";
+ let neverHasSideEffects = 1;
+ let isAsCheapAsAMove = 1;
+}
+def DBG_VALUE : Instruction {
+ let OutOperandList = (outs);
+ let InOperandList = (ins variable_ops);
+ let AsmString = "DBG_VALUE";
+ let Namespace = "TargetOpcode";
+ let isAsCheapAsAMove = 1;
+}
+
+def REG_SEQUENCE : Instruction {
+ let OutOperandList = (outs unknown:$dst);
+ let InOperandList = (ins variable_ops);
let AsmString = "";
- let Namespace = "TargetInstrInfo";
+ let Namespace = "TargetOpcode";
let neverHasSideEffects = 1;
let isAsCheapAsAMove = 1;
}
+}
//===----------------------------------------------------------------------===//
-// AsmParser - This class can be implemented by targets that wish to implement
+// AsmParser - This class can be implemented by targets that wish to implement
// .s file parsing.
//
-// Subtargets can have multiple different assembly parsers (e.g. AT&T vs Intel
+// Subtargets can have multiple different assembly parsers (e.g. AT&T vs Intel
// syntax on X86 for example).
//
class AsmParser {
// class. Generated AsmParser classes are always prefixed with the target
// name.
string AsmParserClassName = "AsmParser";
-
+
+ // AsmParserInstCleanup - If non-empty, this is the name of a custom function on the
+ // AsmParser class to call on every matched instruction. This can be used to
+ // perform target specific instruction post-processing.
+ string AsmParserInstCleanup = "";
+
+ // MatchInstructionName - The name of the instruction matching function to
+ // generate.
+ string MatchInstructionName = "MatchInstruction";
+
// Variant - AsmParsers can be of multiple different variants. Variants are
- // used to support targets that need to parser multiple formats for the
+ // used to support targets that need to parser multiple formats for the
// assembly language.
int Variant = 0;
+
+ // CommentDelimiter - If given, the delimiter string used to recognize
+ // comments which are hard coded in the .td assembler strings for individual
+ // instructions.
+ string CommentDelimiter = "";
+
+ // RegisterPrefix - If given, the token prefix which indicates a register
+ // token. This is used by the matcher to automatically recognize hard coded
+ // register tokens as constrained registers, instead of tokens, for the
+ // purposes of matching.
+ string RegisterPrefix = "";
}
def DefaultAsmParser : AsmParser;
projects / oota-llvm.git / blobdiff