llvm / llvm / 7c4ed1ed6613c8c6315ed546755b311f3f9e46a4 / . / include / llvm / CodeGen / ISDOpcodes.h

//===-- llvm/CodeGen/ISDOpcodes.h - CodeGen opcodes -------------*- C++ -*-===// | |

// | |

// 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 declares codegen opcodes and related utilities. | |

// | |

//===----------------------------------------------------------------------===// | |

#ifndef LLVM_CODEGEN_ISDOPCODES_H | |

#define LLVM_CODEGEN_ISDOPCODES_H | |

namespace llvm { | |

/// ISD namespace - This namespace contains an enum which represents all of the | |

/// SelectionDAG node types and value types. | |

/// | |

namespace ISD { | |

//===--------------------------------------------------------------------===// | |

/// ISD::NodeType enum - This enum defines the target-independent operators | |

/// for a SelectionDAG. | |

/// | |

/// Targets may also define target-dependent operator codes for SDNodes. For | |

/// example, on x86, these are the enum values in the X86ISD namespace. | |

/// Targets should aim to use target-independent operators to model their | |

/// instruction sets as much as possible, and only use target-dependent | |

/// operators when they have special requirements. | |

/// | |

/// Finally, during and after selection proper, SNodes may use special | |

/// operator codes that correspond directly with MachineInstr opcodes. These | |

/// are used to represent selected instructions. See the isMachineOpcode() | |

/// and getMachineOpcode() member functions of SDNode. | |

/// | |

enum NodeType { | |

/// DELETED_NODE - This is an illegal value that is used to catch | |

/// errors. This opcode is not a legal opcode for any node. | |

DELETED_NODE, | |

/// EntryToken - This is the marker used to indicate the start of a region. | |

EntryToken, | |

/// TokenFactor - This node takes multiple tokens as input and produces a | |

/// single token result. This is used to represent the fact that the operand | |

/// operators are independent of each other. | |

TokenFactor, | |

/// AssertSext, AssertZext - These nodes record if a register contains a | |

/// value that has already been zero or sign extended from a narrower type. | |

/// These nodes take two operands. The first is the node that has already | |

/// been extended, and the second is a value type node indicating the width | |

/// of the extension | |

AssertSext, AssertZext, | |

/// Various leaf nodes. | |

BasicBlock, VALUETYPE, CONDCODE, Register, RegisterMask, | |

Constant, ConstantFP, | |

GlobalAddress, GlobalTLSAddress, FrameIndex, | |

JumpTable, ConstantPool, ExternalSymbol, BlockAddress, | |

/// The address of the GOT | |

GLOBAL_OFFSET_TABLE, | |

/// FRAMEADDR, RETURNADDR - These nodes represent llvm.frameaddress and | |

/// llvm.returnaddress on the DAG. These nodes take one operand, the index | |

/// of the frame or return address to return. An index of zero corresponds | |

/// to the current function's frame or return address, an index of one to | |

/// the parent's frame or return address, and so on. | |

FRAMEADDR, RETURNADDR, ADDROFRETURNADDR, SPONENTRY, | |

/// LOCAL_RECOVER - Represents the llvm.localrecover intrinsic. | |

/// Materializes the offset from the local object pointer of another | |

/// function to a particular local object passed to llvm.localescape. The | |

/// operand is the MCSymbol label used to represent this offset, since | |

/// typically the offset is not known until after code generation of the | |

/// parent. | |

LOCAL_RECOVER, | |

/// READ_REGISTER, WRITE_REGISTER - This node represents llvm.register on | |

/// the DAG, which implements the named register global variables extension. | |

READ_REGISTER, | |

WRITE_REGISTER, | |

/// FRAME_TO_ARGS_OFFSET - This node represents offset from frame pointer to | |

/// first (possible) on-stack argument. This is needed for correct stack | |

/// adjustment during unwind. | |

FRAME_TO_ARGS_OFFSET, | |

/// EH_DWARF_CFA - This node represents the pointer to the DWARF Canonical | |

/// Frame Address (CFA), generally the value of the stack pointer at the | |

/// call site in the previous frame. | |

EH_DWARF_CFA, | |

/// OUTCHAIN = EH_RETURN(INCHAIN, OFFSET, HANDLER) - This node represents | |

/// 'eh_return' gcc dwarf builtin, which is used to return from | |

/// exception. The general meaning is: adjust stack by OFFSET and pass | |

/// execution to HANDLER. Many platform-related details also :) | |

EH_RETURN, | |

/// RESULT, OUTCHAIN = EH_SJLJ_SETJMP(INCHAIN, buffer) | |

/// This corresponds to the eh.sjlj.setjmp intrinsic. | |

/// It takes an input chain and a pointer to the jump buffer as inputs | |

/// and returns an outchain. | |

EH_SJLJ_SETJMP, | |

/// OUTCHAIN = EH_SJLJ_LONGJMP(INCHAIN, buffer) | |

/// This corresponds to the eh.sjlj.longjmp intrinsic. | |

/// It takes an input chain and a pointer to the jump buffer as inputs | |

/// and returns an outchain. | |

EH_SJLJ_LONGJMP, | |

/// OUTCHAIN = EH_SJLJ_SETUP_DISPATCH(INCHAIN) | |

/// The target initializes the dispatch table here. | |

EH_SJLJ_SETUP_DISPATCH, | |

/// TargetConstant* - Like Constant*, but the DAG does not do any folding, | |

/// simplification, or lowering of the constant. They are used for constants | |

/// which are known to fit in the immediate fields of their users, or for | |

/// carrying magic numbers which are not values which need to be | |

/// materialized in registers. | |

TargetConstant, | |

TargetConstantFP, | |

/// TargetGlobalAddress - Like GlobalAddress, but the DAG does no folding or | |

/// anything else with this node, and this is valid in the target-specific | |

/// dag, turning into a GlobalAddress operand. | |

TargetGlobalAddress, | |

TargetGlobalTLSAddress, | |

TargetFrameIndex, | |

TargetJumpTable, | |

TargetConstantPool, | |

TargetExternalSymbol, | |

TargetBlockAddress, | |

MCSymbol, | |

/// TargetIndex - Like a constant pool entry, but with completely | |

/// target-dependent semantics. Holds target flags, a 32-bit index, and a | |

/// 64-bit index. Targets can use this however they like. | |

TargetIndex, | |

/// RESULT = INTRINSIC_WO_CHAIN(INTRINSICID, arg1, arg2, ...) | |

/// This node represents a target intrinsic function with no side effects. | |

/// The first operand is the ID number of the intrinsic from the | |

/// llvm::Intrinsic namespace. The operands to the intrinsic follow. The | |

/// node returns the result of the intrinsic. | |

INTRINSIC_WO_CHAIN, | |

/// RESULT,OUTCHAIN = INTRINSIC_W_CHAIN(INCHAIN, INTRINSICID, arg1, ...) | |

/// This node represents a target intrinsic function with side effects that | |

/// returns a result. The first operand is a chain pointer. The second is | |

/// the ID number of the intrinsic from the llvm::Intrinsic namespace. The | |

/// operands to the intrinsic follow. The node has two results, the result | |

/// of the intrinsic and an output chain. | |

INTRINSIC_W_CHAIN, | |

/// OUTCHAIN = INTRINSIC_VOID(INCHAIN, INTRINSICID, arg1, arg2, ...) | |

/// This node represents a target intrinsic function with side effects that | |

/// does not return a result. The first operand is a chain pointer. The | |

/// second is the ID number of the intrinsic from the llvm::Intrinsic | |

/// namespace. The operands to the intrinsic follow. | |

INTRINSIC_VOID, | |

/// CopyToReg - This node has three operands: a chain, a register number to | |

/// set to this value, and a value. | |

CopyToReg, | |

/// CopyFromReg - This node indicates that the input value is a virtual or | |

/// physical register that is defined outside of the scope of this | |

/// SelectionDAG. The register is available from the RegisterSDNode object. | |

CopyFromReg, | |

/// UNDEF - An undefined node. | |

UNDEF, | |

/// EXTRACT_ELEMENT - This is used to get the lower or upper (determined by | |

/// a Constant, which is required to be operand #1) half of the integer or | |

/// float value specified as operand #0. This is only for use before | |

/// legalization, for values that will be broken into multiple registers. | |

EXTRACT_ELEMENT, | |

/// BUILD_PAIR - This is the opposite of EXTRACT_ELEMENT in some ways. | |

/// Given two values of the same integer value type, this produces a value | |

/// twice as big. Like EXTRACT_ELEMENT, this can only be used before | |

/// legalization. The lower part of the composite value should be in | |

/// element 0 and the upper part should be in element 1. | |

BUILD_PAIR, | |

/// MERGE_VALUES - This node takes multiple discrete operands and returns | |

/// them all as its individual results. This nodes has exactly the same | |

/// number of inputs and outputs. This node is useful for some pieces of the | |

/// code generator that want to think about a single node with multiple | |

/// results, not multiple nodes. | |

MERGE_VALUES, | |

/// Simple integer binary arithmetic operators. | |

ADD, SUB, MUL, SDIV, UDIV, SREM, UREM, | |

/// SMUL_LOHI/UMUL_LOHI - Multiply two integers of type iN, producing | |

/// a signed/unsigned value of type i[2*N], and return the full value as | |

/// two results, each of type iN. | |

SMUL_LOHI, UMUL_LOHI, | |

/// SDIVREM/UDIVREM - Divide two integers and produce both a quotient and | |

/// remainder result. | |

SDIVREM, UDIVREM, | |

/// CARRY_FALSE - This node is used when folding other nodes, | |

/// like ADDC/SUBC, which indicate the carry result is always false. | |

CARRY_FALSE, | |

/// Carry-setting nodes for multiple precision addition and subtraction. | |

/// These nodes take two operands of the same value type, and produce two | |

/// results. The first result is the normal add or sub result, the second | |

/// result is the carry flag result. | |

/// FIXME: These nodes are deprecated in favor of ADDCARRY and SUBCARRY. | |

/// They are kept around for now to provide a smooth transition path | |

/// toward the use of ADDCARRY/SUBCARRY and will eventually be removed. | |

ADDC, SUBC, | |

/// Carry-using nodes for multiple precision addition and subtraction. These | |

/// nodes take three operands: The first two are the normal lhs and rhs to | |

/// the add or sub, and the third is the input carry flag. These nodes | |

/// produce two results; the normal result of the add or sub, and the output | |

/// carry flag. These nodes both read and write a carry flag to allow them | |

/// to them to be chained together for add and sub of arbitrarily large | |

/// values. | |

ADDE, SUBE, | |

/// Carry-using nodes for multiple precision addition and subtraction. | |

/// These nodes take three operands: The first two are the normal lhs and | |

/// rhs to the add or sub, and the third is a boolean indicating if there | |

/// is an incoming carry. These nodes produce two results: the normal | |

/// result of the add or sub, and the output carry so they can be chained | |

/// together. The use of this opcode is preferable to adde/sube if the | |

/// target supports it, as the carry is a regular value rather than a | |

/// glue, which allows further optimisation. | |

ADDCARRY, SUBCARRY, | |

/// RESULT, BOOL = [SU]ADDO(LHS, RHS) - Overflow-aware nodes for addition. | |

/// These nodes take two operands: the normal LHS and RHS to the add. They | |

/// produce two results: the normal result of the add, and a boolean that | |

/// indicates if an overflow occurred (*not* a flag, because it may be store | |

/// to memory, etc.). If the type of the boolean is not i1 then the high | |

/// bits conform to getBooleanContents. | |

/// These nodes are generated from llvm.[su]add.with.overflow intrinsics. | |

SADDO, UADDO, | |

/// Same for subtraction. | |

SSUBO, USUBO, | |

/// Same for multiplication. | |

SMULO, UMULO, | |

/// RESULT = [US]ADDSAT(LHS, RHS) - Perform saturation addition on 2 | |

/// integers with the same bit width (W). If the true value of LHS + RHS | |

/// exceeds the largest value that can be represented by W bits, the | |

/// resulting value is this maximum value. Otherwise, if this value is less | |

/// than the smallest value that can be represented by W bits, the | |

/// resulting value is this minimum value. | |

SADDSAT, UADDSAT, | |

/// RESULT = [US]SUBSAT(LHS, RHS) - Perform saturation subtraction on 2 | |

/// integers with the same bit width (W). If the true value of LHS - RHS | |

/// exceeds the largest value that can be represented by W bits, the | |

/// resulting value is this maximum value. Otherwise, if this value is less | |

/// than the smallest value that can be represented by W bits, the | |

/// resulting value is this minimum value. | |

SSUBSAT, USUBSAT, | |

/// RESULT = [US]MULFIX(LHS, RHS, SCALE) - Perform fixed point multiplication on | |

/// 2 integers with the same width and scale. SCALE represents the scale of | |

/// both operands as fixed point numbers. This SCALE parameter must be a | |

/// constant integer. A scale of zero is effectively performing | |

/// multiplication on 2 integers. | |

SMULFIX, UMULFIX, | |

/// Same as the corresponding unsaturated fixed point instructions, but the | |

/// result is clamped between the min and max values representable by the | |

/// bits of the first 2 operands. | |

SMULFIXSAT, UMULFIXSAT, | |

/// Simple binary floating point operators. | |

FADD, FSUB, FMUL, FDIV, FREM, | |

/// Constrained versions of the binary floating point operators. | |

/// These will be lowered to the simple operators before final selection. | |

/// They are used to limit optimizations while the DAG is being | |

/// optimized. | |

STRICT_FADD, STRICT_FSUB, STRICT_FMUL, STRICT_FDIV, STRICT_FREM, | |

STRICT_FMA, | |

/// Constrained versions of libm-equivalent floating point intrinsics. | |

/// These will be lowered to the equivalent non-constrained pseudo-op | |

/// (or expanded to the equivalent library call) before final selection. | |

/// They are used to limit optimizations while the DAG is being optimized. | |

STRICT_FSQRT, STRICT_FPOW, STRICT_FPOWI, STRICT_FSIN, STRICT_FCOS, | |

STRICT_FEXP, STRICT_FEXP2, STRICT_FLOG, STRICT_FLOG10, STRICT_FLOG2, | |

STRICT_FRINT, STRICT_FNEARBYINT, STRICT_FMAXNUM, STRICT_FMINNUM, | |

STRICT_FCEIL, STRICT_FFLOOR, STRICT_FROUND, STRICT_FTRUNC, | |

STRICT_LROUND, STRICT_LLROUND, STRICT_LRINT, STRICT_LLRINT, | |

/// STRICT_FP_TO_[US]INT - Convert a floating point value to a signed or | |

/// unsigned integer. These have the same semantics as fptosi and fptoui | |

/// in IR. | |

/// They are used to limit optimizations while the DAG is being optimized. | |

STRICT_FP_TO_SINT, | |

STRICT_FP_TO_UINT, | |

/// X = STRICT_FP_ROUND(Y, TRUNC) - Rounding 'Y' from a larger floating | |

/// point type down to the precision of the destination VT. TRUNC is a | |

/// flag, which is always an integer that is zero or one. If TRUNC is 0, | |

/// this is a normal rounding, if it is 1, this FP_ROUND is known to not | |

/// change the value of Y. | |

/// | |

/// The TRUNC = 1 case is used in cases where we know that the value will | |

/// not be modified by the node, because Y is not using any of the extra | |

/// precision of source type. This allows certain transformations like | |

/// STRICT_FP_EXTEND(STRICT_FP_ROUND(X,1)) -> X which are not safe for | |

/// STRICT_FP_EXTEND(STRICT_FP_ROUND(X,0)) because the extra bits aren't | |

/// removed. | |

/// It is used to limit optimizations while the DAG is being optimized. | |

STRICT_FP_ROUND, | |

/// X = STRICT_FP_EXTEND(Y) - Extend a smaller FP type into a larger FP | |

/// type. | |

/// It is used to limit optimizations while the DAG is being optimized. | |

STRICT_FP_EXTEND, | |

/// FMA - Perform a * b + c with no intermediate rounding step. | |

FMA, | |

/// FMAD - Perform a * b + c, while getting the same result as the | |

/// separately rounded operations. | |

FMAD, | |

/// FCOPYSIGN(X, Y) - Return the value of X with the sign of Y. NOTE: This | |

/// DAG node does not require that X and Y have the same type, just that | |

/// they are both floating point. X and the result must have the same type. | |

/// FCOPYSIGN(f32, f64) is allowed. | |

FCOPYSIGN, | |

/// INT = FGETSIGN(FP) - Return the sign bit of the specified floating point | |

/// value as an integer 0/1 value. | |

FGETSIGN, | |

/// Returns platform specific canonical encoding of a floating point number. | |

FCANONICALIZE, | |

/// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a vector with the | |

/// specified, possibly variable, elements. The number of elements is | |

/// required to be a power of two. The types of the operands must all be | |

/// the same and must match the vector element type, except that integer | |

/// types are allowed to be larger than the element type, in which case | |

/// the operands are implicitly truncated. | |

BUILD_VECTOR, | |

/// INSERT_VECTOR_ELT(VECTOR, VAL, IDX) - Returns VECTOR with the element | |

/// at IDX replaced with VAL. If the type of VAL is larger than the vector | |

/// element type then VAL is truncated before replacement. | |

INSERT_VECTOR_ELT, | |

/// EXTRACT_VECTOR_ELT(VECTOR, IDX) - Returns a single element from VECTOR | |

/// identified by the (potentially variable) element number IDX. If the | |

/// return type is an integer type larger than the element type of the | |

/// vector, the result is extended to the width of the return type. In | |

/// that case, the high bits are undefined. | |

EXTRACT_VECTOR_ELT, | |

/// CONCAT_VECTORS(VECTOR0, VECTOR1, ...) - Given a number of values of | |

/// vector type with the same length and element type, this produces a | |

/// concatenated vector result value, with length equal to the sum of the | |

/// lengths of the input vectors. | |

CONCAT_VECTORS, | |

/// INSERT_SUBVECTOR(VECTOR1, VECTOR2, IDX) - Returns a vector | |

/// with VECTOR2 inserted into VECTOR1 at the (potentially | |

/// variable) element number IDX, which must be a multiple of the | |

/// VECTOR2 vector length. The elements of VECTOR1 starting at | |

/// IDX are overwritten with VECTOR2. Elements IDX through | |

/// vector_length(VECTOR2) must be valid VECTOR1 indices. | |

INSERT_SUBVECTOR, | |

/// EXTRACT_SUBVECTOR(VECTOR, IDX) - Returns a subvector from VECTOR (an | |

/// vector value) starting with the element number IDX, which must be a | |

/// constant multiple of the result vector length. | |

EXTRACT_SUBVECTOR, | |

/// VECTOR_SHUFFLE(VEC1, VEC2) - Returns a vector, of the same type as | |

/// VEC1/VEC2. A VECTOR_SHUFFLE node also contains an array of constant int | |

/// values that indicate which value (or undef) each result element will | |

/// get. These constant ints are accessible through the | |

/// ShuffleVectorSDNode class. This is quite similar to the Altivec | |

/// 'vperm' instruction, except that the indices must be constants and are | |

/// in terms of the element size of VEC1/VEC2, not in terms of bytes. | |

VECTOR_SHUFFLE, | |

/// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a | |

/// scalar value into element 0 of the resultant vector type. The top | |

/// elements 1 to N-1 of the N-element vector are undefined. The type | |

/// of the operand must match the vector element type, except when they | |

/// are integer types. In this case the operand is allowed to be wider | |

/// than the vector element type, and is implicitly truncated to it. | |

SCALAR_TO_VECTOR, | |

/// SPLAT_VECTOR(VAL) - Returns a vector with the scalar value VAL | |

/// duplicated in all lanes. The type of the operand must match the vector | |

/// element type, except when they are integer types. In this case the | |

/// operand is allowed to be wider than the vector element type, and is | |

/// implicitly truncated to it. | |

SPLAT_VECTOR, | |

/// MULHU/MULHS - Multiply high - Multiply two integers of type iN, | |

/// producing an unsigned/signed value of type i[2*N], then return the top | |

/// part. | |

MULHU, MULHS, | |

/// [US]{MIN/MAX} - Binary minimum or maximum or signed or unsigned | |

/// integers. | |

SMIN, SMAX, UMIN, UMAX, | |

/// Bitwise operators - logical and, logical or, logical xor. | |

AND, OR, XOR, | |

/// ABS - Determine the unsigned absolute value of a signed integer value of | |

/// the same bitwidth. | |

/// Note: A value of INT_MIN will return INT_MIN, no saturation or overflow | |

/// is performed. | |

ABS, | |

/// Shift and rotation operations. After legalization, the type of the | |

/// shift amount is known to be TLI.getShiftAmountTy(). Before legalization | |

/// the shift amount can be any type, but care must be taken to ensure it is | |

/// large enough. TLI.getShiftAmountTy() is i8 on some targets, but before | |

/// legalization, types like i1024 can occur and i8 doesn't have enough bits | |

/// to represent the shift amount. | |

/// When the 1st operand is a vector, the shift amount must be in the same | |

/// type. (TLI.getShiftAmountTy() will return the same type when the input | |

/// type is a vector.) | |

/// For rotates and funnel shifts, the shift amount is treated as an unsigned | |

/// amount modulo the element size of the first operand. | |

/// | |

/// Funnel 'double' shifts take 3 operands, 2 inputs and the shift amount. | |

/// fshl(X,Y,Z): (X << (Z % BW)) | (Y >> (BW - (Z % BW))) | |

/// fshr(X,Y,Z): (X << (BW - (Z % BW))) | (Y >> (Z % BW)) | |

SHL, SRA, SRL, ROTL, ROTR, FSHL, FSHR, | |

/// Byte Swap and Counting operators. | |

BSWAP, CTTZ, CTLZ, CTPOP, BITREVERSE, | |

/// Bit counting operators with an undefined result for zero inputs. | |

CTTZ_ZERO_UNDEF, CTLZ_ZERO_UNDEF, | |

/// Select(COND, TRUEVAL, FALSEVAL). If the type of the boolean COND is not | |

/// i1 then the high bits must conform to getBooleanContents. | |

SELECT, | |

/// Select with a vector condition (op #0) and two vector operands (ops #1 | |

/// and #2), returning a vector result. All vectors have the same length. | |

/// Much like the scalar select and setcc, each bit in the condition selects | |

/// whether the corresponding result element is taken from op #1 or op #2. | |

/// At first, the VSELECT condition is of vXi1 type. Later, targets may | |

/// change the condition type in order to match the VSELECT node using a | |

/// pattern. The condition follows the BooleanContent format of the target. | |

VSELECT, | |

/// Select with condition operator - This selects between a true value and | |

/// a false value (ops #2 and #3) based on the boolean result of comparing | |

/// the lhs and rhs (ops #0 and #1) of a conditional expression with the | |

/// condition code in op #4, a CondCodeSDNode. | |

SELECT_CC, | |

/// SetCC operator - This evaluates to a true value iff the condition is | |

/// true. If the result value type is not i1 then the high bits conform | |

/// to getBooleanContents. The operands to this are the left and right | |

/// operands to compare (ops #0, and #1) and the condition code to compare | |

/// them with (op #2) as a CondCodeSDNode. If the operands are vector types | |

/// then the result type must also be a vector type. | |

SETCC, | |

/// Like SetCC, ops #0 and #1 are the LHS and RHS operands to compare, but | |

/// op #2 is a boolean indicating if there is an incoming carry. This | |

/// operator checks the result of "LHS - RHS - Carry", and can be used to | |

/// compare two wide integers: | |

/// (setcccarry lhshi rhshi (subcarry lhslo rhslo) cc). | |

/// Only valid for integers. | |

SETCCCARRY, | |

/// SHL_PARTS/SRA_PARTS/SRL_PARTS - These operators are used for expanded | |

/// integer shift operations. The operation ordering is: | |

/// [Lo,Hi] = op [LoLHS,HiLHS], Amt | |

SHL_PARTS, SRA_PARTS, SRL_PARTS, | |

/// Conversion operators. These are all single input single output | |

/// operations. For all of these, the result type must be strictly | |

/// wider or narrower (depending on the operation) than the source | |

/// type. | |

/// SIGN_EXTEND - Used for integer types, replicating the sign bit | |

/// into new bits. | |

SIGN_EXTEND, | |

/// ZERO_EXTEND - Used for integer types, zeroing the new bits. | |

ZERO_EXTEND, | |

/// ANY_EXTEND - Used for integer types. The high bits are undefined. | |

ANY_EXTEND, | |

/// TRUNCATE - Completely drop the high bits. | |

TRUNCATE, | |

/// [SU]INT_TO_FP - These operators convert integers (whose interpreted sign | |

/// depends on the first letter) to floating point. | |

SINT_TO_FP, | |

UINT_TO_FP, | |

/// SIGN_EXTEND_INREG - This operator atomically performs a SHL/SRA pair to | |

/// sign extend a small value in a large integer register (e.g. sign | |

/// extending the low 8 bits of a 32-bit register to fill the top 24 bits | |

/// with the 7th bit). The size of the smaller type is indicated by the 1th | |

/// operand, a ValueType node. | |

SIGN_EXTEND_INREG, | |

/// ANY_EXTEND_VECTOR_INREG(Vector) - This operator represents an | |

/// in-register any-extension of the low lanes of an integer vector. The | |

/// result type must have fewer elements than the operand type, and those | |

/// elements must be larger integer types such that the total size of the | |

/// operand type is less than or equal to the size of the result type. Each | |

/// of the low operand elements is any-extended into the corresponding, | |

/// wider result elements with the high bits becoming undef. | |

/// NOTE: The type legalizer prefers to make the operand and result size | |

/// the same to allow expansion to shuffle vector during op legalization. | |

ANY_EXTEND_VECTOR_INREG, | |

/// SIGN_EXTEND_VECTOR_INREG(Vector) - This operator represents an | |

/// in-register sign-extension of the low lanes of an integer vector. The | |

/// result type must have fewer elements than the operand type, and those | |

/// elements must be larger integer types such that the total size of the | |

/// operand type is less than or equal to the size of the result type. Each | |

/// of the low operand elements is sign-extended into the corresponding, | |

/// wider result elements. | |

/// NOTE: The type legalizer prefers to make the operand and result size | |

/// the same to allow expansion to shuffle vector during op legalization. | |

SIGN_EXTEND_VECTOR_INREG, | |

/// ZERO_EXTEND_VECTOR_INREG(Vector) - This operator represents an | |

/// in-register zero-extension of the low lanes of an integer vector. The | |

/// result type must have fewer elements than the operand type, and those | |

/// elements must be larger integer types such that the total size of the | |

/// operand type is less than or equal to the size of the result type. Each | |

/// of the low operand elements is zero-extended into the corresponding, | |

/// wider result elements. | |

/// NOTE: The type legalizer prefers to make the operand and result size | |

/// the same to allow expansion to shuffle vector during op legalization. | |

ZERO_EXTEND_VECTOR_INREG, | |

/// FP_TO_[US]INT - Convert a floating point value to a signed or unsigned | |

/// integer. These have the same semantics as fptosi and fptoui in IR. If | |

/// the FP value cannot fit in the integer type, the results are undefined. | |

FP_TO_SINT, | |

FP_TO_UINT, | |

/// X = FP_ROUND(Y, TRUNC) - Rounding 'Y' from a larger floating point type | |

/// down to the precision of the destination VT. TRUNC is a flag, which is | |

/// always an integer that is zero or one. If TRUNC is 0, this is a | |

/// normal rounding, if it is 1, this FP_ROUND is known to not change the | |

/// value of Y. | |

/// | |

/// The TRUNC = 1 case is used in cases where we know that the value will | |

/// not be modified by the node, because Y is not using any of the extra | |

/// precision of source type. This allows certain transformations like | |

/// FP_EXTEND(FP_ROUND(X,1)) -> X which are not safe for | |

/// FP_EXTEND(FP_ROUND(X,0)) because the extra bits aren't removed. | |

FP_ROUND, | |

/// FLT_ROUNDS_ - Returns current rounding mode: | |

/// -1 Undefined | |

/// 0 Round to 0 | |

/// 1 Round to nearest | |

/// 2 Round to +inf | |

/// 3 Round to -inf | |

FLT_ROUNDS_, | |

/// X = FP_EXTEND(Y) - Extend a smaller FP type into a larger FP type. | |

FP_EXTEND, | |

/// BITCAST - This operator converts between integer, vector and FP | |

/// values, as if the value was stored to memory with one type and loaded | |

/// from the same address with the other type (or equivalently for vector | |

/// format conversions, etc). The source and result are required to have | |

/// the same bit size (e.g. f32 <-> i32). This can also be used for | |

/// int-to-int or fp-to-fp conversions, but that is a noop, deleted by | |

/// getNode(). | |

/// | |

/// This operator is subtly different from the bitcast instruction from | |

/// LLVM-IR since this node may change the bits in the register. For | |

/// example, this occurs on big-endian NEON and big-endian MSA where the | |

/// layout of the bits in the register depends on the vector type and this | |

/// operator acts as a shuffle operation for some vector type combinations. | |

BITCAST, | |

/// ADDRSPACECAST - This operator converts between pointers of different | |

/// address spaces. | |

ADDRSPACECAST, | |

/// FP16_TO_FP, FP_TO_FP16 - These operators are used to perform promotions | |

/// and truncation for half-precision (16 bit) floating numbers. These nodes | |

/// form a semi-softened interface for dealing with f16 (as an i16), which | |

/// is often a storage-only type but has native conversions. | |

FP16_TO_FP, FP_TO_FP16, | |

/// Perform various unary floating-point operations inspired by libm. For | |

/// FPOWI, the result is undefined if if the integer operand doesn't fit | |

/// into 32 bits. | |

FNEG, FABS, FSQRT, FCBRT, FSIN, FCOS, FPOWI, FPOW, | |

FLOG, FLOG2, FLOG10, FEXP, FEXP2, | |

FCEIL, FTRUNC, FRINT, FNEARBYINT, FROUND, FFLOOR, | |

LROUND, LLROUND, LRINT, LLRINT, | |

/// FMINNUM/FMAXNUM - Perform floating-point minimum or maximum on two | |

/// values. | |

// | |

/// In the case where a single input is a NaN (either signaling or quiet), | |

/// the non-NaN input is returned. | |

/// | |

/// The return value of (FMINNUM 0.0, -0.0) could be either 0.0 or -0.0. | |

FMINNUM, FMAXNUM, | |

/// FMINNUM_IEEE/FMAXNUM_IEEE - Perform floating-point minimum or maximum on | |

/// two values, following the IEEE-754 2008 definition. This differs from | |

/// FMINNUM/FMAXNUM in the handling of signaling NaNs. If one input is a | |

/// signaling NaN, returns a quiet NaN. | |

FMINNUM_IEEE, FMAXNUM_IEEE, | |

/// FMINIMUM/FMAXIMUM - NaN-propagating minimum/maximum that also treat -0.0 | |

/// as less than 0.0. While FMINNUM_IEEE/FMAXNUM_IEEE follow IEEE 754-2008 | |

/// semantics, FMINIMUM/FMAXIMUM follow IEEE 754-2018 draft semantics. | |

FMINIMUM, FMAXIMUM, | |

/// FSINCOS - Compute both fsin and fcos as a single operation. | |

FSINCOS, | |

/// LOAD and STORE have token chains as their first operand, then the same | |

/// operands as an LLVM load/store instruction, then an offset node that | |

/// is added / subtracted from the base pointer to form the address (for | |

/// indexed memory ops). | |

LOAD, STORE, | |

/// DYNAMIC_STACKALLOC - Allocate some number of bytes on the stack aligned | |

/// to a specified boundary. This node always has two return values: a new | |

/// stack pointer value and a chain. The first operand is the token chain, | |

/// the second is the number of bytes to allocate, and the third is the | |

/// alignment boundary. The size is guaranteed to be a multiple of the | |

/// stack alignment, and the alignment is guaranteed to be bigger than the | |

/// stack alignment (if required) or 0 to get standard stack alignment. | |

DYNAMIC_STACKALLOC, | |

/// Control flow instructions. These all have token chains. | |

/// BR - Unconditional branch. The first operand is the chain | |

/// operand, the second is the MBB to branch to. | |

BR, | |

/// BRIND - Indirect branch. The first operand is the chain, the second | |

/// is the value to branch to, which must be of the same type as the | |

/// target's pointer type. | |

BRIND, | |

/// BR_JT - Jumptable branch. The first operand is the chain, the second | |

/// is the jumptable index, the last one is the jumptable entry index. | |

BR_JT, | |

/// BRCOND - Conditional branch. The first operand is the chain, the | |

/// second is the condition, the third is the block to branch to if the | |

/// condition is true. If the type of the condition is not i1, then the | |

/// high bits must conform to getBooleanContents. | |

BRCOND, | |

/// BR_CC - Conditional branch. The behavior is like that of SELECT_CC, in | |

/// that the condition is represented as condition code, and two nodes to | |

/// compare, rather than as a combined SetCC node. The operands in order | |

/// are chain, cc, lhs, rhs, block to branch to if condition is true. | |

BR_CC, | |

/// INLINEASM - Represents an inline asm block. This node always has two | |

/// return values: a chain and a flag result. The inputs are as follows: | |

/// Operand #0 : Input chain. | |

/// Operand #1 : a ExternalSymbolSDNode with a pointer to the asm string. | |

/// Operand #2 : a MDNodeSDNode with the !srcloc metadata. | |

/// Operand #3 : HasSideEffect, IsAlignStack bits. | |

/// After this, it is followed by a list of operands with this format: | |

/// ConstantSDNode: Flags that encode whether it is a mem or not, the | |

/// of operands that follow, etc. See InlineAsm.h. | |

/// ... however many operands ... | |

/// Operand #last: Optional, an incoming flag. | |

/// | |

/// The variable width operands are required to represent target addressing | |

/// modes as a single "operand", even though they may have multiple | |

/// SDOperands. | |

INLINEASM, | |

/// INLINEASM_BR - Terminator version of inline asm. Used by asm-goto. | |

INLINEASM_BR, | |

/// EH_LABEL - Represents a label in mid basic block used to track | |

/// locations needed for debug and exception handling tables. These nodes | |

/// take a chain as input and return a chain. | |

EH_LABEL, | |

/// ANNOTATION_LABEL - Represents a mid basic block label used by | |

/// annotations. This should remain within the basic block and be ordered | |

/// with respect to other call instructions, but loads and stores may float | |

/// past it. | |

ANNOTATION_LABEL, | |

/// CATCHPAD - Represents a catchpad instruction. | |

CATCHPAD, | |

/// CATCHRET - Represents a return from a catch block funclet. Used for | |

/// MSVC compatible exception handling. Takes a chain operand and a | |

/// destination basic block operand. | |

CATCHRET, | |

/// CLEANUPRET - Represents a return from a cleanup block funclet. Used for | |

/// MSVC compatible exception handling. Takes only a chain operand. | |

CLEANUPRET, | |

/// STACKSAVE - STACKSAVE has one operand, an input chain. It produces a | |

/// value, the same type as the pointer type for the system, and an output | |

/// chain. | |

STACKSAVE, | |

/// STACKRESTORE has two operands, an input chain and a pointer to restore | |

/// to it returns an output chain. | |

STACKRESTORE, | |

/// CALLSEQ_START/CALLSEQ_END - These operators mark the beginning and end | |

/// of a call sequence, and carry arbitrary information that target might | |

/// want to know. The first operand is a chain, the rest are specified by | |

/// the target and not touched by the DAG optimizers. | |

/// Targets that may use stack to pass call arguments define additional | |

/// operands: | |

/// - size of the call frame part that must be set up within the | |

/// CALLSEQ_START..CALLSEQ_END pair, | |

/// - part of the call frame prepared prior to CALLSEQ_START. | |

/// Both these parameters must be constants, their sum is the total call | |

/// frame size. | |

/// CALLSEQ_START..CALLSEQ_END pairs may not be nested. | |

CALLSEQ_START, // Beginning of a call sequence | |

CALLSEQ_END, // End of a call sequence | |

/// VAARG - VAARG has four operands: an input chain, a pointer, a SRCVALUE, | |

/// and the alignment. It returns a pair of values: the vaarg value and a | |

/// new chain. | |

VAARG, | |

/// VACOPY - VACOPY has 5 operands: an input chain, a destination pointer, | |

/// a source pointer, a SRCVALUE for the destination, and a SRCVALUE for the | |

/// source. | |

VACOPY, | |

/// VAEND, VASTART - VAEND and VASTART have three operands: an input chain, | |

/// pointer, and a SRCVALUE. | |

VAEND, VASTART, | |

/// SRCVALUE - This is a node type that holds a Value* that is used to | |

/// make reference to a value in the LLVM IR. | |

SRCVALUE, | |

/// MDNODE_SDNODE - This is a node that holdes an MDNode*, which is used to | |

/// reference metadata in the IR. | |

MDNODE_SDNODE, | |

/// PCMARKER - This corresponds to the pcmarker intrinsic. | |

PCMARKER, | |

/// READCYCLECOUNTER - This corresponds to the readcyclecounter intrinsic. | |

/// It produces a chain and one i64 value. The only operand is a chain. | |

/// If i64 is not legal, the result will be expanded into smaller values. | |

/// Still, it returns an i64, so targets should set legality for i64. | |

/// The result is the content of the architecture-specific cycle | |

/// counter-like register (or other high accuracy low latency clock source). | |

READCYCLECOUNTER, | |

/// HANDLENODE node - Used as a handle for various purposes. | |

HANDLENODE, | |

/// INIT_TRAMPOLINE - This corresponds to the init_trampoline intrinsic. It | |

/// takes as input a token chain, the pointer to the trampoline, the pointer | |

/// to the nested function, the pointer to pass for the 'nest' parameter, a | |

/// SRCVALUE for the trampoline and another for the nested function | |

/// (allowing targets to access the original Function*). | |

/// It produces a token chain as output. | |

INIT_TRAMPOLINE, | |

/// ADJUST_TRAMPOLINE - This corresponds to the adjust_trampoline intrinsic. | |

/// It takes a pointer to the trampoline and produces a (possibly) new | |

/// pointer to the same trampoline with platform-specific adjustments | |

/// applied. The pointer it returns points to an executable block of code. | |

ADJUST_TRAMPOLINE, | |

/// TRAP - Trapping instruction | |

TRAP, | |

/// DEBUGTRAP - Trap intended to get the attention of a debugger. | |

DEBUGTRAP, | |

/// PREFETCH - This corresponds to a prefetch intrinsic. The first operand | |

/// is the chain. The other operands are the address to prefetch, | |

/// read / write specifier, locality specifier and instruction / data cache | |

/// specifier. | |

PREFETCH, | |

/// OUTCHAIN = ATOMIC_FENCE(INCHAIN, ordering, scope) | |

/// This corresponds to the fence instruction. It takes an input chain, and | |

/// two integer constants: an AtomicOrdering and a SynchronizationScope. | |

ATOMIC_FENCE, | |

/// Val, OUTCHAIN = ATOMIC_LOAD(INCHAIN, ptr) | |

/// This corresponds to "load atomic" instruction. | |

ATOMIC_LOAD, | |

/// OUTCHAIN = ATOMIC_STORE(INCHAIN, ptr, val) | |

/// This corresponds to "store atomic" instruction. | |

ATOMIC_STORE, | |

/// Val, OUTCHAIN = ATOMIC_CMP_SWAP(INCHAIN, ptr, cmp, swap) | |

/// For double-word atomic operations: | |

/// ValLo, ValHi, OUTCHAIN = ATOMIC_CMP_SWAP(INCHAIN, ptr, cmpLo, cmpHi, | |

/// swapLo, swapHi) | |

/// This corresponds to the cmpxchg instruction. | |

ATOMIC_CMP_SWAP, | |

/// Val, Success, OUTCHAIN | |

/// = ATOMIC_CMP_SWAP_WITH_SUCCESS(INCHAIN, ptr, cmp, swap) | |

/// N.b. this is still a strong cmpxchg operation, so | |

/// Success == "Val == cmp". | |

ATOMIC_CMP_SWAP_WITH_SUCCESS, | |

/// Val, OUTCHAIN = ATOMIC_SWAP(INCHAIN, ptr, amt) | |

/// Val, OUTCHAIN = ATOMIC_LOAD_[OpName](INCHAIN, ptr, amt) | |

/// For double-word atomic operations: | |

/// ValLo, ValHi, OUTCHAIN = ATOMIC_SWAP(INCHAIN, ptr, amtLo, amtHi) | |

/// ValLo, ValHi, OUTCHAIN = ATOMIC_LOAD_[OpName](INCHAIN, ptr, amtLo, amtHi) | |

/// These correspond to the atomicrmw instruction. | |

ATOMIC_SWAP, | |

ATOMIC_LOAD_ADD, | |

ATOMIC_LOAD_SUB, | |

ATOMIC_LOAD_AND, | |

ATOMIC_LOAD_CLR, | |

ATOMIC_LOAD_OR, | |

ATOMIC_LOAD_XOR, | |

ATOMIC_LOAD_NAND, | |

ATOMIC_LOAD_MIN, | |

ATOMIC_LOAD_MAX, | |

ATOMIC_LOAD_UMIN, | |

ATOMIC_LOAD_UMAX, | |

ATOMIC_LOAD_FADD, | |

ATOMIC_LOAD_FSUB, | |

// Masked load and store - consecutive vector load and store operations | |

// with additional mask operand that prevents memory accesses to the | |

// masked-off lanes. | |

// | |

// Val, OutChain = MLOAD(BasePtr, Mask, PassThru) | |

// OutChain = MSTORE(Value, BasePtr, Mask) | |

MLOAD, MSTORE, | |

// Masked gather and scatter - load and store operations for a vector of | |

// random addresses with additional mask operand that prevents memory | |

// accesses to the masked-off lanes. | |

// | |

// Val, OutChain = GATHER(InChain, PassThru, Mask, BasePtr, Index, Scale) | |

// OutChain = SCATTER(InChain, Value, Mask, BasePtr, Index, Scale) | |

// | |

// The Index operand can have more vector elements than the other operands | |

// due to type legalization. The extra elements are ignored. | |

MGATHER, MSCATTER, | |

/// This corresponds to the llvm.lifetime.* intrinsics. The first operand | |

/// is the chain and the second operand is the alloca pointer. | |

LIFETIME_START, LIFETIME_END, | |

/// GC_TRANSITION_START/GC_TRANSITION_END - These operators mark the | |

/// beginning and end of GC transition sequence, and carry arbitrary | |

/// information that target might need for lowering. The first operand is | |

/// a chain, the rest are specified by the target and not touched by the DAG | |

/// optimizers. GC_TRANSITION_START..GC_TRANSITION_END pairs may not be | |

/// nested. | |

GC_TRANSITION_START, | |

GC_TRANSITION_END, | |

/// GET_DYNAMIC_AREA_OFFSET - get offset from native SP to the address of | |

/// the most recent dynamic alloca. For most targets that would be 0, but | |

/// for some others (e.g. PowerPC, PowerPC64) that would be compile-time | |

/// known nonzero constant. The only operand here is the chain. | |

GET_DYNAMIC_AREA_OFFSET, | |

/// Generic reduction nodes. These nodes represent horizontal vector | |

/// reduction operations, producing a scalar result. | |

/// The STRICT variants perform reductions in sequential order. The first | |

/// operand is an initial scalar accumulator value, and the second operand | |

/// is the vector to reduce. | |

VECREDUCE_STRICT_FADD, VECREDUCE_STRICT_FMUL, | |

/// These reductions are non-strict, and have a single vector operand. | |

VECREDUCE_FADD, VECREDUCE_FMUL, | |

/// FMIN/FMAX nodes can have flags, for NaN/NoNaN variants. | |

VECREDUCE_FMAX, VECREDUCE_FMIN, | |

/// Integer reductions may have a result type larger than the vector element | |

/// type. However, the reduction is performed using the vector element type | |

/// and the value in the top bits is unspecified. | |

VECREDUCE_ADD, VECREDUCE_MUL, | |

VECREDUCE_AND, VECREDUCE_OR, VECREDUCE_XOR, | |

VECREDUCE_SMAX, VECREDUCE_SMIN, VECREDUCE_UMAX, VECREDUCE_UMIN, | |

/// BUILTIN_OP_END - This must be the last enum value in this list. | |

/// The target-specific pre-isel opcode values start here. | |

BUILTIN_OP_END | |

}; | |

/// FIRST_TARGET_MEMORY_OPCODE - Target-specific pre-isel operations | |

/// which do not reference a specific memory location should be less than | |

/// this value. Those that do must not be less than this value, and can | |

/// be used with SelectionDAG::getMemIntrinsicNode. | |

static const int FIRST_TARGET_MEMORY_OPCODE = BUILTIN_OP_END+400; | |

//===--------------------------------------------------------------------===// | |

/// MemIndexedMode enum - This enum defines the load / store indexed | |

/// addressing modes. | |

/// | |

/// UNINDEXED "Normal" load / store. The effective address is already | |

/// computed and is available in the base pointer. The offset | |

/// operand is always undefined. In addition to producing a | |

/// chain, an unindexed load produces one value (result of the | |

/// load); an unindexed store does not produce a value. | |

/// | |

/// PRE_INC Similar to the unindexed mode where the effective address is | |

/// PRE_DEC the value of the base pointer add / subtract the offset. | |

/// It considers the computation as being folded into the load / | |

/// store operation (i.e. the load / store does the address | |

/// computation as well as performing the memory transaction). | |

/// The base operand is always undefined. In addition to | |

/// producing a chain, pre-indexed load produces two values | |

/// (result of the load and the result of the address | |

/// computation); a pre-indexed store produces one value (result | |

/// of the address computation). | |

/// | |

/// POST_INC The effective address is the value of the base pointer. The | |

/// POST_DEC value of the offset operand is then added to / subtracted | |

/// from the base after memory transaction. In addition to | |

/// producing a chain, post-indexed load produces two values | |

/// (the result of the load and the result of the base +/- offset | |

/// computation); a post-indexed store produces one value (the | |

/// the result of the base +/- offset computation). | |

enum MemIndexedMode { | |

UNINDEXED = 0, | |

PRE_INC, | |

PRE_DEC, | |

POST_INC, | |

POST_DEC | |

}; | |

static const int LAST_INDEXED_MODE = POST_DEC + 1; | |

//===--------------------------------------------------------------------===// | |

/// MemIndexType enum - This enum defines how to interpret MGATHER/SCATTER's | |

/// index parameter when calculating addresses. | |

/// | |

/// SIGNED_SCALED Addr = Base + ((signed)Index * sizeof(element)) | |

/// SIGNED_UNSCALED Addr = Base + (signed)Index | |

/// UNSIGNED_SCALED Addr = Base + ((unsigned)Index * sizeof(element)) | |

/// UNSIGNED_UNSCALED Addr = Base + (unsigned)Index | |

enum MemIndexType { | |

SIGNED_SCALED = 0, | |

SIGNED_UNSCALED, | |

UNSIGNED_SCALED, | |

UNSIGNED_UNSCALED | |

}; | |

static const int LAST_MEM_INDEX_TYPE = UNSIGNED_UNSCALED + 1; | |

//===--------------------------------------------------------------------===// | |

/// LoadExtType enum - This enum defines the three variants of LOADEXT | |

/// (load with extension). | |

/// | |

/// SEXTLOAD loads the integer operand and sign extends it to a larger | |

/// integer result type. | |

/// ZEXTLOAD loads the integer operand and zero extends it to a larger | |

/// integer result type. | |

/// EXTLOAD is used for two things: floating point extending loads and | |

/// integer extending loads [the top bits are undefined]. | |

enum LoadExtType { | |

NON_EXTLOAD = 0, | |

EXTLOAD, | |

SEXTLOAD, | |

ZEXTLOAD | |

}; | |

static const int LAST_LOADEXT_TYPE = ZEXTLOAD + 1; | |

NodeType getExtForLoadExtType(bool IsFP, LoadExtType); | |

//===--------------------------------------------------------------------===// | |

/// ISD::CondCode enum - These are ordered carefully to make the bitfields | |

/// below work out, when considering SETFALSE (something that never exists | |

/// dynamically) as 0. "U" -> Unsigned (for integer operands) or Unordered | |

/// (for floating point), "L" -> Less than, "G" -> Greater than, "E" -> Equal | |

/// to. If the "N" column is 1, the result of the comparison is undefined if | |

/// the input is a NAN. | |

/// | |

/// All of these (except for the 'always folded ops') should be handled for | |

/// floating point. For integer, only the SETEQ,SETNE,SETLT,SETLE,SETGT, | |

/// SETGE,SETULT,SETULE,SETUGT, and SETUGE opcodes are used. | |

/// | |

/// Note that these are laid out in a specific order to allow bit-twiddling | |

/// to transform conditions. | |

enum CondCode { | |

// Opcode N U L G E Intuitive operation | |

SETFALSE, // 0 0 0 0 Always false (always folded) | |

SETOEQ, // 0 0 0 1 True if ordered and equal | |

SETOGT, // 0 0 1 0 True if ordered and greater than | |

SETOGE, // 0 0 1 1 True if ordered and greater than or equal | |

SETOLT, // 0 1 0 0 True if ordered and less than | |

SETOLE, // 0 1 0 1 True if ordered and less than or equal | |

SETONE, // 0 1 1 0 True if ordered and operands are unequal | |

SETO, // 0 1 1 1 True if ordered (no nans) | |

SETUO, // 1 0 0 0 True if unordered: isnan(X) | isnan(Y) | |

SETUEQ, // 1 0 0 1 True if unordered or equal | |

SETUGT, // 1 0 1 0 True if unordered or greater than | |

SETUGE, // 1 0 1 1 True if unordered, greater than, or equal | |

SETULT, // 1 1 0 0 True if unordered or less than | |

SETULE, // 1 1 0 1 True if unordered, less than, or equal | |

SETUNE, // 1 1 1 0 True if unordered or not equal | |

SETTRUE, // 1 1 1 1 Always true (always folded) | |

// Don't care operations: undefined if the input is a nan. | |

SETFALSE2, // 1 X 0 0 0 Always false (always folded) | |

SETEQ, // 1 X 0 0 1 True if equal | |

SETGT, // 1 X 0 1 0 True if greater than | |

SETGE, // 1 X 0 1 1 True if greater than or equal | |

SETLT, // 1 X 1 0 0 True if less than | |

SETLE, // 1 X 1 0 1 True if less than or equal | |

SETNE, // 1 X 1 1 0 True if not equal | |

SETTRUE2, // 1 X 1 1 1 Always true (always folded) | |

SETCC_INVALID // Marker value. | |

}; | |

/// Return true if this is a setcc instruction that performs a signed | |

/// comparison when used with integer operands. | |

inline bool isSignedIntSetCC(CondCode Code) { | |

return Code == SETGT || Code == SETGE || Code == SETLT || Code == SETLE; | |

} | |

/// Return true if this is a setcc instruction that performs an unsigned | |

/// comparison when used with integer operands. | |

inline bool isUnsignedIntSetCC(CondCode Code) { | |

return Code == SETUGT || Code == SETUGE || Code == SETULT || Code == SETULE; | |

} | |

/// Return true if the specified condition returns true if the two operands to | |

/// the condition are equal. Note that if one of the two operands is a NaN, | |

/// this value is meaningless. | |

inline bool isTrueWhenEqual(CondCode Cond) { | |

return ((int)Cond & 1) != 0; | |

} | |

/// This function returns 0 if the condition is always false if an operand is | |

/// a NaN, 1 if the condition is always true if the operand is a NaN, and 2 if | |

/// the condition is undefined if the operand is a NaN. | |

inline unsigned getUnorderedFlavor(CondCode Cond) { | |

return ((int)Cond >> 3) & 3; | |

} | |

/// Return the operation corresponding to !(X op Y), where 'op' is a valid | |

/// SetCC operation. | |

CondCode getSetCCInverse(CondCode Operation, bool isInteger); | |

/// Return the operation corresponding to (Y op X) when given the operation | |

/// for (X op Y). | |

CondCode getSetCCSwappedOperands(CondCode Operation); | |

/// Return the result of a logical OR between different comparisons of | |

/// identical values: ((X op1 Y) | (X op2 Y)). This function returns | |

/// SETCC_INVALID if it is not possible to represent the resultant comparison. | |

CondCode getSetCCOrOperation(CondCode Op1, CondCode Op2, bool isInteger); | |

/// Return the result of a logical AND between different comparisons of | |

/// identical values: ((X op1 Y) & (X op2 Y)). This function returns | |

/// SETCC_INVALID if it is not possible to represent the resultant comparison. | |

CondCode getSetCCAndOperation(CondCode Op1, CondCode Op2, bool isInteger); | |

} // end llvm::ISD namespace | |

} // end llvm namespace | |

#endif |