//===-- X86BaseInfo.h - Top level definitions for X86 -------- --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains small standalone helper functions and enum definitions for
// the X86 target useful for the compiler back-end and the MC libraries.
// As such, it deliberately does not include references to LLVM core
// code gen types, passes, etc..
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H
#define LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H
#include "X86MCTargetDesc.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
namespace X86 {
// Enums for memory operand decoding. Each memory operand is represented with
// a 5 operand sequence in the form:
// [BaseReg, ScaleAmt, IndexReg, Disp, Segment]
// These enums help decode this.
enum {
AddrBaseReg = 0,
AddrScaleAmt = 1,
AddrIndexReg = 2,
AddrDisp = 3,
/// AddrSegmentReg - The operand # of the segment in the memory operand.
AddrSegmentReg = 4,
/// AddrNumOperands - Total number of operands in a memory reference.
AddrNumOperands = 5
};
} // end namespace X86;
/// X86II - This namespace holds all of the target specific flags that
/// instruction info tracks.
///
namespace X86II {
/// Target Operand Flag enum.
enum TOF {
//===------------------------------------------------------------------===//
// X86 Specific MachineOperand flags.
MO_NO_FLAG,
/// MO_GOT_ABSOLUTE_ADDRESS - On a symbol operand, this represents a
/// relocation of:
/// SYMBOL_LABEL + [. - PICBASELABEL]
MO_GOT_ABSOLUTE_ADDRESS,
/// MO_PIC_BASE_OFFSET - On a symbol operand this indicates that the
/// immediate should get the value of the symbol minus the PIC base label:
/// SYMBOL_LABEL - PICBASELABEL
MO_PIC_BASE_OFFSET,
/// MO_GOT - On a symbol operand this indicates that the immediate is the
/// offset to the GOT entry for the symbol name from the base of the GOT.
///
/// See the X86-64 ELF ABI supplement for more details.
/// SYMBOL_LABEL @GOT
MO_GOT,
/// MO_GOTOFF - On a symbol operand this indicates that the immediate is
/// the offset to the location of the symbol name from the base of the GOT.
///
/// See the X86-64 ELF ABI supplement for more details.
/// SYMBOL_LABEL @GOTOFF
MO_GOTOFF,
/// MO_GOTPCREL - On a symbol operand this indicates that the immediate is
/// offset to the GOT entry for the symbol name from the current code
/// location.
///
/// See the X86-64 ELF ABI supplement for more details.
/// SYMBOL_LABEL @GOTPCREL
MO_GOTPCREL,
/// MO_PLT - On a symbol operand this indicates that the immediate is
/// offset to the PLT entry of symbol name from the current code location.
///
/// See the X86-64 ELF ABI supplement for more details.
/// SYMBOL_LABEL @PLT
MO_PLT,
/// MO_TLSGD - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the TLS index structure that contains
/// the module number and variable offset for the symbol. Used in the
/// general dynamic TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @TLSGD
MO_TLSGD,
/// MO_TLSLD - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the TLS index for the module that
/// contains the symbol. When this index is passed to a call to
/// __tls_get_addr, the function will return the base address of the TLS
/// block for the symbol. Used in the x86-64 local dynamic TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @TLSLD
MO_TLSLD,
/// MO_TLSLDM - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the TLS index for the module that
/// contains the symbol. When this index is passed to a call to
/// ___tls_get_addr, the function will return the base address of the TLS
/// block for the symbol. Used in the IA32 local dynamic TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @TLSLDM
MO_TLSLDM,
/// MO_GOTTPOFF - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the thread-pointer offset for the
/// symbol. Used in the x86-64 initial exec TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @GOTTPOFF
MO_GOTTPOFF,
/// MO_INDNTPOFF - On a symbol operand this indicates that the immediate is
/// the absolute address of the GOT entry with the negative thread-pointer
/// offset for the symbol. Used in the non-PIC IA32 initial exec TLS access
/// model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @INDNTPOFF
MO_INDNTPOFF,
/// MO_TPOFF - On a symbol operand this indicates that the immediate is
/// the thread-pointer offset for the symbol. Used in the x86-64 local
/// exec TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @TPOFF
MO_TPOFF,
/// MO_DTPOFF - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the TLS offset of the symbol. Used
/// in the local dynamic TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @DTPOFF
MO_DTPOFF,
/// MO_NTPOFF - On a symbol operand this indicates that the immediate is
/// the negative thread-pointer offset for the symbol. Used in the IA32
/// local exec TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @NTPOFF
MO_NTPOFF,
/// MO_GOTNTPOFF - On a symbol operand this indicates that the immediate is
/// the offset of the GOT entry with the negative thread-pointer offset for
/// the symbol. Used in the PIC IA32 initial exec TLS access model.
///
/// See 'ELF Handling for Thread-Local Storage' for more details.
/// SYMBOL_LABEL @GOTNTPOFF
MO_GOTNTPOFF,
/// MO_DLLIMPORT - On a symbol operand "FOO", this indicates that the
/// reference is actually to the "__imp_FOO" symbol. This is used for
/// dllimport linkage on windows.
MO_DLLIMPORT,
/// MO_DARWIN_STUB - On a symbol operand "FOO", this indicates that the
/// reference is actually to the "FOO$stub" symbol. This is used for calls
/// and jumps to external functions on Tiger and earlier.
MO_DARWIN_STUB,
/// MO_DARWIN_NONLAZY - On a symbol operand "FOO", this indicates that the
/// reference is actually to the "FOO$non_lazy_ptr" symbol, which is a
/// non-PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
MO_DARWIN_NONLAZY,
/// MO_DARWIN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this indicates
/// that the reference is actually to "FOO$non_lazy_ptr - PICBASE", which is
/// a PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
MO_DARWIN_NONLAZY_PIC_BASE,
/// MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this
/// indicates that the reference is actually to "FOO$non_lazy_ptr -PICBASE",
/// which is a PIC-base-relative reference to a hidden dyld lazy pointer
/// stub.
MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE,
/// MO_TLVP - On a symbol operand this indicates that the immediate is
/// some TLS offset.
///
/// This is the TLS offset for the Darwin TLS mechanism.
MO_TLVP,
/// MO_TLVP_PIC_BASE - On a symbol operand this indicates that the immediate
/// is some TLS offset from the picbase.
///
/// This is the 32-bit TLS offset for Darwin TLS in PIC mode.
MO_TLVP_PIC_BASE,
/// MO_SECREL - On a symbol operand this indicates that the immediate is
/// the offset from beginning of section.
///
/// This is the TLS offset for the COFF/Windows TLS mechanism.
MO_SECREL
};
enum : uint64_t {
//===------------------------------------------------------------------===//
// Instruction encodings. These are the standard/most common forms for X86
// instructions.
//
// PseudoFrm - This represents an instruction that is a pseudo instruction
// or one that has not been implemented yet. It is illegal to code generate
// it, but tolerated for intermediate implementation stages.
Pseudo = 0,
/// Raw - This form is for instructions that don't have any operands, so
/// they are just a fixed opcode value, like 'leave'.
RawFrm = 1,
/// AddRegFrm - This form is used for instructions like 'push r32' that have
/// their one register operand added to their opcode.
AddRegFrm = 2,
/// MRMDestReg - This form is used for instructions that use the Mod/RM byte
/// to specify a destination, which in this case is a register.
///
MRMDestReg = 3,
/// MRMDestMem - This form is used for instructions that use the Mod/RM byte
/// to specify a destination, which in this case is memory.
///
MRMDestMem = 4,
/// MRMSrcReg - This form is used for instructions that use the Mod/RM byte
/// to specify a source, which in this case is a register.
///
MRMSrcReg = 5,
/// MRMSrcMem - This form is used for instructions that use the Mod/RM byte
/// to specify a source, which in this case is memory.
///
MRMSrcMem = 6,
/// RawFrmMemOffs - This form is for instructions that store an absolute
/// memory offset as an immediate with a possible segment override.
RawFrmMemOffs = 7,
/// RawFrmSrc - This form is for instructions that use the source index
/// register SI/ESI/RSI with a possible segment override.
RawFrmSrc = 8,
/// RawFrmDst - This form is for instructions that use the destination index
/// register DI/EDI/ESI.
RawFrmDst = 9,
/// RawFrmSrc - This form is for instructions that use the source index
/// register SI/ESI/ERI with a possible segment override, and also the
/// destination index register DI/ESI/RDI.
RawFrmDstSrc = 10,
/// RawFrmImm8 - This is used for the ENTER instruction, which has two
/// immediates, the first of which is a 16-bit immediate (specified by
/// the imm encoding) and the second is a 8-bit fixed value.
RawFrmImm8 = 11,
/// RawFrmImm16 - This is used for CALL FAR instructions, which have two
/// immediates, the first of which is a 16 or 32-bit immediate (specified by
/// the imm encoding) and the second is a 16-bit fixed value. In the AMD
/// manual, this operand is described as pntr16:32 and pntr16:16
RawFrmImm16 = 12,
/// MRMX[rm] - The forms are used to represent instructions that use a
/// Mod/RM byte, and don't use the middle field for anything.
MRMXr = 14, MRMXm = 15,
/// MRM[0-7][rm] - These forms are used to represent instructions that use
/// a Mod/RM byte, and use the middle field to hold extended opcode
/// information. In the intel manual these are represented as /0, /1, ...
///
// First, instructions that operate on a register r/m operand...
MRM0r = 16, MRM1r = 17, MRM2r = 18, MRM3r = 19, // Format /0 /1 /2 /3
MRM4r = 20, MRM5r = 21, MRM6r = 22, MRM7r = 23, // Format /4 /5 /6 /7
// Next, instructions that operate on a memory r/m operand...
MRM0m = 24, MRM1m = 25, MRM2m = 26, MRM3m = 27, // Format /0 /1 /2 /3
MRM4m = 28, MRM5m = 29, MRM6m = 30, MRM7m = 31, // Format /4 /5 /6 /7
//// MRM_XX - A mod/rm byte of exactly 0xXX.
MRM_C0 = 32, MRM_C1 = 33, MRM_C2 = 34, MRM_C3 = 35,
MRM_C4 = 36, MRM_C5 = 37, MRM_C6 = 38, MRM_C7 = 39,
MRM_C8 = 40, MRM_C9 = 41, MRM_CA = 42, MRM_CB = 43,
MRM_CC = 44, MRM_CD = 45, MRM_CE = 46, MRM_CF = 47,
MRM_D0 = 48, MRM_D1 = 49, MRM_D2 = 50, MRM_D3 = 51,
MRM_D4 = 52, MRM_D5 = 53, MRM_D6 = 54, MRM_D7 = 55,
MRM_D8 = 56, MRM_D9 = 57, MRM_DA = 58, MRM_DB = 59,
MRM_DC = 60, MRM_DD = 61, MRM_DE = 62, MRM_DF = 63,
MRM_E0 = 64, MRM_E1 = 65, MRM_E2 = 66, MRM_E3 = 67,
MRM_E4 = 68, MRM_E5 = 69, MRM_E6 = 70, MRM_E7 = 71,
MRM_E8 = 72, MRM_E9 = 73, MRM_EA = 74, MRM_EB = 75,
MRM_EC = 76, MRM_ED = 77, MRM_EE = 78, MRM_EF = 79,
MRM_F0 = 80, MRM_F1 = 81, MRM_F2 = 82, MRM_F3 = 83,
MRM_F4 = 84, MRM_F5 = 85, MRM_F6 = 86, MRM_F7 = 87,
MRM_F8 = 88, MRM_F9 = 89, MRM_FA = 90, MRM_FB = 91,
MRM_FC = 92, MRM_FD = 93, MRM_FE = 94, MRM_FF = 95,
FormMask = 127,
//===------------------------------------------------------------------===//
// Actual flags...
// OpSize - OpSizeFixed implies instruction never needs a 0x66 prefix.
// OpSize16 means this is a 16-bit instruction and needs 0x66 prefix in
// 32-bit mode. OpSize32 means this is a 32-bit instruction needs a 0x66
// prefix in 16-bit mode.
OpSizeShift = 7,
OpSizeMask = 0x3 << OpSizeShift,
OpSizeFixed = 0 << OpSizeShift,
OpSize16 = 1 << OpSizeShift,
OpSize32 = 2 << OpSizeShift,
// AsSize - AdSizeX implies this instruction determines its need of 0x67
// prefix from a normal ModRM memory operand. The other types indicate that
// an operand is encoded with a specific width and a prefix is needed if
// it differs from the current mode.
AdSizeShift = OpSizeShift + 2,
AdSizeMask = 0x3 << AdSizeShift,
AdSizeX = 1 << AdSizeShift,
AdSize16 = 1 << AdSizeShift,
AdSize32 = 2 << AdSizeShift,
AdSize64 = 3 << AdSizeShift,
//===------------------------------------------------------------------===//
// OpPrefix - There are several prefix bytes that are used as opcode
// extensions. These are 0x66, 0xF3, and 0xF2. If this field is 0 there is
// no prefix.
//
OpPrefixShift = AdSizeShift + 2,
OpPrefixMask = 0x7 << OpPrefixShift,
// PS, PD - Prefix code for packed single and double precision vector
// floating point operations performed in the SSE registers.
PS = 1 << OpPrefixShift, PD = 2 << OpPrefixShift,
// XS, XD - These prefix codes are for single and double precision scalar
// floating point operations performed in the SSE registers.
XS = 3 << OpPrefixShift, XD = 4 << OpPrefixShift,
//===------------------------------------------------------------------===//
// OpMap - This field determines which opcode map this instruction
// belongs to. i.e. one-byte, two-byte, 0x0f 0x38, 0x0f 0x3a, etc.
//
OpMapShift = OpPrefixShift + 3,
OpMapMask = 0x7 << OpMapShift,
// OB - OneByte - Set if this instruction has a one byte opcode.
OB = 0 << OpMapShift,
// TB - TwoByte - Set if this instruction has a two byte opcode, which
// starts with a 0x0F byte before the real opcode.
TB = 1 << OpMapShift,
// T8, TA - Prefix after the 0x0F prefix.
T8 = 2 << OpMapShift, TA = 3 << OpMapShift,
// XOP8 - Prefix to include use of imm byte.
XOP8 = 4 << OpMapShift,
// XOP9 - Prefix to exclude use of imm byte.
XOP9 = 5 << OpMapShift,
// XOPA - Prefix to encode 0xA in VEX.MMMM of XOP instructions.
XOPA = 6 << OpMapShift,
//===------------------------------------------------------------------===//
// REX_W - REX prefixes are instruction prefixes used in 64-bit mode.
// They are used to specify GPRs and SSE registers, 64-bit operand size,
// etc. We only cares about REX.W and REX.R bits and only the former is
// statically determined.
//
REXShift = OpMapShift + 3,
REX_W = 1 << REXShift,
//===------------------------------------------------------------------===//
// This three-bit field describes the size of an immediate operand. Zero is
// unused so that we can tell if we forgot to set a value.
ImmShift = REXShift + 1,
ImmMask = 15 << ImmShift,
Imm8 = 1 << ImmShift,
Imm8PCRel = 2 << ImmShift,
Imm16 = 3 << ImmShift,
Imm16PCRel = 4 << ImmShift,
Imm32 = 5 << ImmShift,
Imm32PCRel = 6 << ImmShift,
Imm32S = 7 << ImmShift,
Imm64 = 8 << ImmShift,
//===------------------------------------------------------------------===//
// FP Instruction Classification... Zero is non-fp instruction.
// FPTypeMask - Mask for all of the FP types...
FPTypeShift = ImmShift + 4,
FPTypeMask = 7 << FPTypeShift,
// NotFP - The default, set for instructions that do not use FP registers.
NotFP = 0 << FPTypeShift,
// ZeroArgFP - 0 arg FP instruction which implicitly pushes ST(0), f.e. fld0
ZeroArgFP = 1 << FPTypeShift,
// OneArgFP - 1 arg FP instructions which implicitly read ST(0), such as fst
OneArgFP = 2 << FPTypeShift,
// OneArgFPRW - 1 arg FP instruction which implicitly read ST(0) and write a
// result back to ST(0). For example, fcos, fsqrt, etc.
//
OneArgFPRW = 3 << FPTypeShift,
// TwoArgFP - 2 arg FP instructions which implicitly read ST(0), and an
// explicit argument, storing the result to either ST(0) or the implicit
// argument. For example: fadd, fsub, fmul, etc...
TwoArgFP = 4 << FPTypeShift,
// CompareFP - 2 arg FP instructions which implicitly read ST(0) and an
// explicit argument, but have no destination. Example: fucom, fucomi, ...
CompareFP = 5 << FPTypeShift,
// CondMovFP - "2 operand" floating point conditional move instructions.
CondMovFP = 6 << FPTypeShift,
// SpecialFP - Special instruction forms. Dispatch by opcode explicitly.
SpecialFP = 7 << FPTypeShift,
// Lock prefix
LOCKShift = FPTypeShift + 3,
LOCK = 1 << LOCKShift,
// REP prefix
REPShift = LOCKShift + 1,
REP = 1 << REPShift,
// Execution domain for SSE instructions.
// 0 means normal, non-SSE instruction.
SSEDomainShift = REPShift + 1,
// Encoding
EncodingShift = SSEDomainShift + 2,
EncodingMask = 0x3 << EncodingShift,
// VEX - encoding using 0xC4/0xC5
VEX = 1 << EncodingShift,
/// XOP - Opcode prefix used by XOP instructions.
XOP = 2 << EncodingShift,
// VEX_EVEX - Specifies that this instruction use EVEX form which provides
// syntax support up to 32 512-bit register operands and up to 7 16-bit
// mask operands as well as source operand data swizzling/memory operand
// conversion, eviction hint, and rounding mode.
EVEX = 3 << EncodingShift,
// Opcode
OpcodeShift = EncodingShift + 2,
/// VEX_W - Has a opcode specific functionality, but is used in the same
/// way as REX_W is for regular SSE instructions.
VEX_WShift = OpcodeShift + 8,
VEX_W = 1ULL << VEX_WShift,
/// VEX_4V - Used to specify an additional AVX/SSE register. Several 2
/// address instructions in SSE are represented as 3 address ones in AVX
/// and the additional register is encoded in VEX_VVVV prefix.
VEX_4VShift = VEX_WShift + 1,
VEX_4V = 1ULL << VEX_4VShift,
/// VEX_4VOp3 - Similar to VEX_4V, but used on instructions that encode
/// operand 3 with VEX.vvvv.
VEX_4VOp3Shift = VEX_4VShift + 1,
VEX_4VOp3 = 1ULL << VEX_4VOp3Shift,
/// VEX_I8IMM - Specifies that the last register used in a AVX instruction,
/// must be encoded in the i8 immediate field. This usually happens in
/// instructions with 4 operands.
VEX_I8IMMShift = VEX_4VOp3Shift + 1,
VEX_I8IMM = 1ULL << VEX_I8IMMShift,
/// VEX_L - Stands for a bit in the VEX opcode prefix meaning the current
/// instruction uses 256-bit wide registers. This is usually auto detected
/// if a VR256 register is used, but some AVX instructions also have this
/// field marked when using a f256 memory references.
VEX_LShift = VEX_I8IMMShift + 1,
VEX_L = 1ULL << VEX_LShift,
// VEX_LIG - Specifies that this instruction ignores the L-bit in the VEX
// prefix. Usually used for scalar instructions. Needed by disassembler.
VEX_LIGShift = VEX_LShift + 1,
VEX_LIG = 1ULL << VEX_LIGShift,
// TODO: we should combine VEX_L and VEX_LIG together to form a 2-bit field
// with following encoding:
// - 00 V128
// - 01 V256
// - 10 V512
// - 11 LIG (but, in insn encoding, leave VEX.L and EVEX.L in zeros.
// this will save 1 tsflag bit
// EVEX_K - Set if this instruction requires masking
EVEX_KShift = VEX_LIGShift + 1,
EVEX_K = 1ULL << EVEX_KShift,
// EVEX_Z - Set if this instruction has EVEX.Z field set.
EVEX_ZShift = EVEX_KShift + 1,
EVEX_Z = 1ULL << EVEX_ZShift,
// EVEX_L2 - Set if this instruction has EVEX.L' field set.
EVEX_L2Shift = EVEX_ZShift + 1,
EVEX_L2 = 1ULL << EVEX_L2Shift,
// EVEX_B - Set if this instruction has EVEX.B field set.
EVEX_BShift = EVEX_L2Shift + 1,
EVEX_B = 1ULL << EVEX_BShift,
// The scaling factor for the AVX512's 8-bit compressed displacement.
CD8_Scale_Shift = EVEX_BShift + 1,
CD8_Scale_Mask = 127ULL << CD8_Scale_Shift,
/// Has3DNow0F0FOpcode - This flag indicates that the instruction uses the
/// wacky 0x0F 0x0F prefix for 3DNow! instructions. The manual documents
/// this as having a 0x0F prefix with a 0x0F opcode, and each instruction
/// storing a classifier in the imm8 field. To simplify our implementation,
/// we handle this by storeing the classifier in the opcode field and using
/// this flag to indicate that the encoder should do the wacky 3DNow! thing.
Has3DNow0F0FOpcodeShift = CD8_Scale_Shift + 7,
Has3DNow0F0FOpcode = 1ULL << Has3DNow0F0FOpcodeShift,
/// MemOp4 - Used to indicate swapping of operand 3 and 4 to be encoded in
/// ModRM or I8IMM. This is used for FMA4 and XOP instructions.
MemOp4Shift = Has3DNow0F0FOpcodeShift + 1,
MemOp4 = 1ULL << MemOp4Shift,
/// Explicitly specified rounding control
EVEX_RCShift = MemOp4Shift + 1,
EVEX_RC = 1ULL << EVEX_RCShift
};
// getBaseOpcodeFor - This function returns the "base" X86 opcode for the
// specified machine instruction.
//
inline unsigned char getBaseOpcodeFor(uint64_t TSFlags) {
return TSFlags >> X86II::OpcodeShift;
}
inline bool hasImm(uint64_t TSFlags) {
return (TSFlags & X86II::ImmMask) != 0;
}
/// getSizeOfImm - Decode the "size of immediate" field from the TSFlags field
/// of the specified instruction.
inline unsigned getSizeOfImm(uint64_t TSFlags) {
switch (TSFlags & X86II::ImmMask) {
default: llvm_unreachable("Unknown immediate size");
case X86II::Imm8:
case X86II::Imm8PCRel: return 1;
case X86II::Imm16:
case X86II::Imm16PCRel: return 2;
case X86II::Imm32:
case X86II::Imm32S:
case X86II::Imm32PCRel: return 4;
case X86II::Imm64: return 8;
}
}
/// isImmPCRel - Return true if the immediate of the specified instruction's
/// TSFlags indicates that it is pc relative.
inline unsigned isImmPCRel(uint64_t TSFlags) {
switch (TSFlags & X86II::ImmMask) {
default: llvm_unreachable("Unknown immediate size");
case X86II::Imm8PCRel:
case X86II::Imm16PCRel:
case X86II::Imm32PCRel:
return true;
case X86II::Imm8:
case X86II::Imm16:
case X86II::Imm32:
case X86II::Imm32S:
case X86II::Imm64:
return false;
}
}
/// isImmSigned - Return true if the immediate of the specified instruction's
/// TSFlags indicates that it is signed.
inline unsigned isImmSigned(uint64_t TSFlags) {
switch (TSFlags & X86II::ImmMask) {
default: llvm_unreachable("Unknown immediate signedness");
case X86II::Imm32S:
return true;
case X86II::Imm8:
case X86II::Imm8PCRel:
case X86II::Imm16:
case X86II::Imm16PCRel:
case X86II::Imm32:
case X86II::Imm32PCRel:
case X86II::Imm64:
return false;
}
}
/// getOperandBias - compute any additional adjustment needed to
/// the offset to the start of the memory operand
/// in this instruction.
/// If this is a two-address instruction,skip one of the register operands.
/// FIXME: This should be handled during MCInst lowering.
inline int getOperandBias(const MCInstrDesc& Desc)
{
unsigned NumOps = Desc.getNumOperands();
unsigned CurOp = 0;
if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) == 0)
++CurOp;
else if (NumOps > 3 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 &&
Desc.getOperandConstraint(3, MCOI::TIED_TO) == 1)
// Special case for AVX-512 GATHER with 2 TIED_TO operands
// Skip the first 2 operands: dst, mask_wb
CurOp += 2;
else if (NumOps > 3 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 &&
Desc.getOperandConstraint(NumOps - 1, MCOI::TIED_TO) == 1)
// Special case for GATHER with 2 TIED_TO operands
// Skip the first 2 operands: dst, mask_wb
CurOp += 2;
else if (NumOps > 2 && Desc.getOperandConstraint(NumOps - 2, MCOI::TIED_TO) == 0)
// SCATTER
++CurOp;
return CurOp;
}
/// getMemoryOperandNo - The function returns the MCInst operand # for the
/// first field of the memory operand. If the instruction doesn't have a
/// memory operand, this returns -1.
///
/// Note that this ignores tied operands. If there is a tied register which
/// is duplicated in the MCInst (e.g. "EAX = addl EAX, [mem]") it is only
/// counted as one operand.
///
inline int getMemoryOperandNo(uint64_t TSFlags, unsigned Opcode) {
bool HasVEX_4V = TSFlags & X86II::VEX_4V;
bool HasMemOp4 = TSFlags & X86II::MemOp4;
bool HasEVEX_K = TSFlags & X86II::EVEX_K;
switch (TSFlags & X86II::FormMask) {
default: llvm_unreachable("Unknown FormMask value in getMemoryOperandNo!");
case X86II::Pseudo:
case X86II::RawFrm:
case X86II::AddRegFrm:
case X86II::MRMDestReg:
case X86II::MRMSrcReg:
case X86II::RawFrmImm8:
case X86II::RawFrmImm16:
case X86II::RawFrmMemOffs:
case X86II::RawFrmSrc:
case X86II::RawFrmDst:
case X86II::RawFrmDstSrc:
return -1;
case X86II::MRMDestMem:
return 0;
case X86II::MRMSrcMem:
// Start from 1, skip any registers encoded in VEX_VVVV or I8IMM, or a
// mask register.
return 1 + HasVEX_4V + HasMemOp4 + HasEVEX_K;
case X86II::MRMXr:
case X86II::MRM0r: case X86II::MRM1r:
case X86II::MRM2r: case X86II::MRM3r:
case X86II::MRM4r: case X86II::MRM5r:
case X86II::MRM6r: case X86II::MRM7r:
return -1;
case X86II::MRMXm:
case X86II::MRM0m: case X86II::MRM1m:
case X86II::MRM2m: case X86II::MRM3m:
case X86II::MRM4m: case X86II::MRM5m:
case X86II::MRM6m: case X86II::MRM7m:
// Start from 0, skip registers encoded in VEX_VVVV or a mask register.
return 0 + HasVEX_4V + HasEVEX_K;
case X86II::MRM_C0: case X86II::MRM_C1: case X86II::MRM_C2:
case X86II::MRM_C3: case X86II::MRM_C4: case X86II::MRM_C8:
case X86II::MRM_C9: case X86II::MRM_CA: case X86II::MRM_CB:
case X86II::MRM_CF: case X86II::MRM_D0: case X86II::MRM_D1:
case X86II::MRM_D4: case X86II::MRM_D5: case X86II::MRM_D6:
case X86II::MRM_D7: case X86II::MRM_D8: case X86II::MRM_D9:
case X86II::MRM_DA: case X86II::MRM_DB: case X86II::MRM_DC:
case X86II::MRM_DD: case X86II::MRM_DE: case X86II::MRM_DF:
case X86II::MRM_E0: case X86II::MRM_E1: case X86II::MRM_E2:
case X86II::MRM_E3: case X86II::MRM_E4: case X86II::MRM_E5:
case X86II::MRM_E8: case X86II::MRM_E9: case X86II::MRM_EA:
case X86II::MRM_EB: case X86II::MRM_EC: case X86II::MRM_ED:
case X86II::MRM_EE: case X86II::MRM_F0: case X86II::MRM_F1:
case X86II::MRM_F2: case X86II::MRM_F3: case X86II::MRM_F4:
case X86II::MRM_F5: case X86II::MRM_F6: case X86II::MRM_F7:
case X86II::MRM_F8: case X86II::MRM_F9: case X86II::MRM_FA:
case X86II::MRM_FB: case X86II::MRM_FC: case X86II::MRM_FD:
case X86II::MRM_FE: case X86II::MRM_FF:
return -1;
}
}
/// isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or
/// higher) register? e.g. r8, xmm8, xmm13, etc.
inline bool isX86_64ExtendedReg(unsigned RegNo) {
if ((RegNo > X86::XMM7 && RegNo <= X86::XMM15) ||
(RegNo > X86::XMM23 && RegNo <= X86::XMM31) ||
(RegNo > X86::YMM7 && RegNo <= X86::YMM15) ||
(RegNo > X86::YMM23 && RegNo <= X86::YMM31) ||
(RegNo > X86::ZMM7 && RegNo <= X86::ZMM15) ||
(RegNo > X86::ZMM23 && RegNo <= X86::ZMM31))
return true;
switch (RegNo) {
default: break;
case X86::R8: case X86::R9: case X86::R10: case X86::R11:
case X86::R12: case X86::R13: case X86::R14: case X86::R15:
case X86::R8D: case X86::R9D: case X86::R10D: case X86::R11D:
case X86::R12D: case X86::R13D: case X86::R14D: case X86::R15D:
case X86::R8W: case X86::R9W: case X86::R10W: case X86::R11W:
case X86::R12W: case X86::R13W: case X86::R14W: case X86::R15W:
case X86::R8B: case X86::R9B: case X86::R10B: case X86::R11B:
case X86::R12B: case X86::R13B: case X86::R14B: case X86::R15B:
case X86::CR8: case X86::CR9: case X86::CR10: case X86::CR11:
case X86::CR12: case X86::CR13: case X86::CR14: case X86::CR15:
return true;
}
return false;
}
/// is32ExtendedReg - Is the MemoryOperand a 32 extended (zmm16 or higher)
/// registers? e.g. zmm21, etc.
static inline bool is32ExtendedReg(unsigned RegNo) {
return ((RegNo > X86::XMM15 && RegNo <= X86::XMM31) ||
(RegNo > X86::YMM15 && RegNo <= X86::YMM31) ||
(RegNo > X86::ZMM15 && RegNo <= X86::ZMM31));
}
inline bool isX86_64NonExtLowByteReg(unsigned reg) {
return (reg == X86::SPL || reg == X86::BPL ||
reg == X86::SIL || reg == X86::DIL);
}
}
} // end namespace llvm;
#endif