1 files changed, 406 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h b/contrib/llvm-project/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
new file mode 100644
index 000000000000..6c9f860c204c
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
@@ -0,0 +1,406 @@
+//===-- RISCVBaseInfo.h - Top level definitions for RISCV MC ----*- 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 contains small standalone enum definitions for the RISCV target
+// useful for the compiler back-end and the MC libraries.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVBASEINFO_H
+#define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVBASEINFO_H
+
+#include "MCTargetDesc/RISCVMCTargetDesc.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/MC/MCInstrDesc.h"
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/Support/MachineValueType.h"
+
+namespace llvm {
+
+// RISCVII - This namespace holds all of the target specific flags that
+// instruction info tracks. All definitions must match RISCVInstrFormats.td.
+namespace RISCVII {
+enum {
+  InstFormatPseudo = 0,
+  InstFormatR = 1,
+  InstFormatR4 = 2,
+  InstFormatI = 3,
+  InstFormatS = 4,
+  InstFormatB = 5,
+  InstFormatU = 6,
+  InstFormatJ = 7,
+  InstFormatCR = 8,
+  InstFormatCI = 9,
+  InstFormatCSS = 10,
+  InstFormatCIW = 11,
+  InstFormatCL = 12,
+  InstFormatCS = 13,
+  InstFormatCA = 14,
+  InstFormatCB = 15,
+  InstFormatCJ = 16,
+  InstFormatOther = 17,
+
+  InstFormatMask = 31,
+
+  ConstraintShift = 5,
+  ConstraintMask = 0b111 << ConstraintShift,
+
+  VLMulShift = ConstraintShift + 3,
+  VLMulMask = 0b111 << VLMulShift,
+
+  // Do we need to add a dummy mask op when converting RVV Pseudo to MCInst.
+  HasDummyMaskOpShift = VLMulShift + 3,
+  HasDummyMaskOpMask = 1 << HasDummyMaskOpShift,
+
+  // Does this instruction only update element 0 the destination register.
+  WritesElement0Shift = HasDummyMaskOpShift + 1,
+  WritesElement0Mask = 1 << WritesElement0Shift,
+
+  // Does this instruction have a merge operand that must be removed when
+  // converting to MCInst. It will be the first explicit use operand. Used by
+  // RVV Pseudos.
+  HasMergeOpShift = WritesElement0Shift + 1,
+  HasMergeOpMask = 1 << HasMergeOpShift,
+
+  // Does this instruction have a SEW operand. It will be the last explicit
+  // operand. Used by RVV Pseudos.
+  HasSEWOpShift = HasMergeOpShift + 1,
+  HasSEWOpMask = 1 << HasSEWOpShift,
+
+  // Does this instruction have a VL operand. It will be the second to last
+  // explicit operand. Used by RVV Pseudos.
+  HasVLOpShift = HasSEWOpShift + 1,
+  HasVLOpMask = 1 << HasVLOpShift,
+};
+
+// Match with the definitions in RISCVInstrFormatsV.td
+enum RVVConstraintType {
+  NoConstraint = 0,
+  VS2Constraint = 0b001,
+  VS1Constraint = 0b010,
+  VMConstraint = 0b100,
+};
+
+// RISC-V Specific Machine Operand Flags
+enum {
+  MO_None = 0,
+  MO_CALL = 1,
+  MO_PLT = 2,
+  MO_LO = 3,
+  MO_HI = 4,
+  MO_PCREL_LO = 5,
+  MO_PCREL_HI = 6,
+  MO_GOT_HI = 7,
+  MO_TPREL_LO = 8,
+  MO_TPREL_HI = 9,
+  MO_TPREL_ADD = 10,
+  MO_TLS_GOT_HI = 11,
+  MO_TLS_GD_HI = 12,
+
+  // Used to differentiate between target-specific "direct" flags and "bitmask"
+  // flags. A machine operand can only have one "direct" flag, but can have
+  // multiple "bitmask" flags.
+  MO_DIRECT_FLAG_MASK = 15
+};
+} // namespace RISCVII
+
+namespace RISCVOp {
+enum OperandType : unsigned {
+  OPERAND_FIRST_RISCV_IMM = MCOI::OPERAND_FIRST_TARGET,
+  OPERAND_UIMM4 = OPERAND_FIRST_RISCV_IMM,
+  OPERAND_UIMM5,
+  OPERAND_UIMM12,
+  OPERAND_SIMM12,
+  OPERAND_UIMM20,
+  OPERAND_UIMMLOG2XLEN,
+  OPERAND_LAST_RISCV_IMM = OPERAND_UIMMLOG2XLEN
+};
+} // namespace RISCVOp
+
+// Describes the predecessor/successor bits used in the FENCE instruction.
+namespace RISCVFenceField {
+enum FenceField {
+  I = 8,
+  O = 4,
+  R = 2,
+  W = 1
+};
+}
+
+// Describes the supported floating point rounding mode encodings.
+namespace RISCVFPRndMode {
+enum RoundingMode {
+  RNE = 0,
+  RTZ = 1,
+  RDN = 2,
+  RUP = 3,
+  RMM = 4,
+  DYN = 7,
+  Invalid
+};
+
+inline static StringRef roundingModeToString(RoundingMode RndMode) {
+  switch (RndMode) {
+  default:
+    llvm_unreachable("Unknown floating point rounding mode");
+  case RISCVFPRndMode::RNE:
+    return "rne";
+  case RISCVFPRndMode::RTZ:
+    return "rtz";
+  case RISCVFPRndMode::RDN:
+    return "rdn";
+  case RISCVFPRndMode::RUP:
+    return "rup";
+  case RISCVFPRndMode::RMM:
+    return "rmm";
+  case RISCVFPRndMode::DYN:
+    return "dyn";
+  }
+}
+
+inline static RoundingMode stringToRoundingMode(StringRef Str) {
+  return StringSwitch<RoundingMode>(Str)
+      .Case("rne", RISCVFPRndMode::RNE)
+      .Case("rtz", RISCVFPRndMode::RTZ)
+      .Case("rdn", RISCVFPRndMode::RDN)
+      .Case("rup", RISCVFPRndMode::RUP)
+      .Case("rmm", RISCVFPRndMode::RMM)
+      .Case("dyn", RISCVFPRndMode::DYN)
+      .Default(RISCVFPRndMode::Invalid);
+}
+
+inline static bool isValidRoundingMode(unsigned Mode) {
+  switch (Mode) {
+  default:
+    return false;
+  case RISCVFPRndMode::RNE:
+  case RISCVFPRndMode::RTZ:
+  case RISCVFPRndMode::RDN:
+  case RISCVFPRndMode::RUP:
+  case RISCVFPRndMode::RMM:
+  case RISCVFPRndMode::DYN:
+    return true;
+  }
+}
+} // namespace RISCVFPRndMode
+
+namespace RISCVSysReg {
+struct SysReg {
+  const char *Name;
+  unsigned Encoding;
+  const char *AltName;
+  // FIXME: add these additional fields when needed.
+  // Privilege Access: Read, Write, Read-Only.
+  // unsigned ReadWrite;
+  // Privilege Mode: User, System or Machine.
+  // unsigned Mode;
+  // Check field name.
+  // unsigned Extra;
+  // Register number without the privilege bits.
+  // unsigned Number;
+  FeatureBitset FeaturesRequired;
+  bool isRV32Only;
+
+  bool haveRequiredFeatures(FeatureBitset ActiveFeatures) const {
+    // Not in 32-bit mode.
+    if (isRV32Only && ActiveFeatures[RISCV::Feature64Bit])
+      return false;
+    // No required feature associated with the system register.
+    if (FeaturesRequired.none())
+      return true;
+    return (FeaturesRequired & ActiveFeatures) == FeaturesRequired;
+  }
+};
+
+#define GET_SysRegsList_DECL
+#include "RISCVGenSearchableTables.inc"
+} // end namespace RISCVSysReg
+
+namespace RISCVABI {
+
+enum ABI {
+  ABI_ILP32,
+  ABI_ILP32F,
+  ABI_ILP32D,
+  ABI_ILP32E,
+  ABI_LP64,
+  ABI_LP64F,
+  ABI_LP64D,
+  ABI_Unknown
+};
+
+// Returns the target ABI, or else a StringError if the requested ABIName is
+// not supported for the given TT and FeatureBits combination.
+ABI computeTargetABI(const Triple &TT, FeatureBitset FeatureBits,
+                     StringRef ABIName);
+
+ABI getTargetABI(StringRef ABIName);
+
+// Returns the register used to hold the stack pointer after realignment.
+MCRegister getBPReg();
+
+// Returns the register holding shadow call stack pointer.
+MCRegister getSCSPReg();
+
+} // namespace RISCVABI
+
+namespace RISCVFeatures {
+
+// Validates if the given combination of features are valid for the target
+// triple. Exits with report_fatal_error if not.
+void validate(const Triple &TT, const FeatureBitset &FeatureBits);
+
+} // namespace RISCVFeatures
+
+namespace RISCVVMVTs {
+
+constexpr MVT vint8mf8_t = MVT::nxv1i8;
+constexpr MVT vint8mf4_t = MVT::nxv2i8;
+constexpr MVT vint8mf2_t = MVT::nxv4i8;
+constexpr MVT vint8m1_t = MVT::nxv8i8;
+constexpr MVT vint8m2_t = MVT::nxv16i8;
+constexpr MVT vint8m4_t = MVT::nxv32i8;
+constexpr MVT vint8m8_t = MVT::nxv64i8;
+
+constexpr MVT vint16mf4_t = MVT::nxv1i16;
+constexpr MVT vint16mf2_t = MVT::nxv2i16;
+constexpr MVT vint16m1_t = MVT::nxv4i16;
+constexpr MVT vint16m2_t = MVT::nxv8i16;
+constexpr MVT vint16m4_t = MVT::nxv16i16;
+constexpr MVT vint16m8_t = MVT::nxv32i16;
+
+constexpr MVT vint32mf2_t = MVT::nxv1i32;
+constexpr MVT vint32m1_t = MVT::nxv2i32;
+constexpr MVT vint32m2_t = MVT::nxv4i32;
+constexpr MVT vint32m4_t = MVT::nxv8i32;
+constexpr MVT vint32m8_t = MVT::nxv16i32;
+
+constexpr MVT vint64m1_t = MVT::nxv1i64;
+constexpr MVT vint64m2_t = MVT::nxv2i64;
+constexpr MVT vint64m4_t = MVT::nxv4i64;
+constexpr MVT vint64m8_t = MVT::nxv8i64;
+
+constexpr MVT vfloat16mf4_t = MVT::nxv1f16;
+constexpr MVT vfloat16mf2_t = MVT::nxv2f16;
+constexpr MVT vfloat16m1_t = MVT::nxv4f16;
+constexpr MVT vfloat16m2_t = MVT::nxv8f16;
+constexpr MVT vfloat16m4_t = MVT::nxv16f16;
+constexpr MVT vfloat16m8_t = MVT::nxv32f16;
+
+constexpr MVT vfloat32mf2_t = MVT::nxv1f32;
+constexpr MVT vfloat32m1_t = MVT::nxv2f32;
+constexpr MVT vfloat32m2_t = MVT::nxv4f32;
+constexpr MVT vfloat32m4_t = MVT::nxv8f32;
+constexpr MVT vfloat32m8_t = MVT::nxv16f32;
+
+constexpr MVT vfloat64m1_t = MVT::nxv1f64;
+constexpr MVT vfloat64m2_t = MVT::nxv2f64;
+constexpr MVT vfloat64m4_t = MVT::nxv4f64;
+constexpr MVT vfloat64m8_t = MVT::nxv8f64;
+
+constexpr MVT vbool1_t = MVT::nxv64i1;
+constexpr MVT vbool2_t = MVT::nxv32i1;
+constexpr MVT vbool4_t = MVT::nxv16i1;
+constexpr MVT vbool8_t = MVT::nxv8i1;
+constexpr MVT vbool16_t = MVT::nxv4i1;
+constexpr MVT vbool32_t = MVT::nxv2i1;
+constexpr MVT vbool64_t = MVT::nxv1i1;
+
+} // namespace RISCVVMVTs
+
+enum class RISCVVSEW {
+  SEW_8 = 0,
+  SEW_16,
+  SEW_32,
+  SEW_64,
+  SEW_128,
+  SEW_256,
+  SEW_512,
+  SEW_1024,
+};
+
+enum class RISCVVLMUL {
+  LMUL_1 = 0,
+  LMUL_2,
+  LMUL_4,
+  LMUL_8,
+  LMUL_RESERVED,
+  LMUL_F8,
+  LMUL_F4,
+  LMUL_F2
+};
+
+namespace RISCVVType {
+// Is this a SEW value that can be encoded into the VTYPE format.
+inline static bool isValidSEW(unsigned SEW) {
+  return isPowerOf2_32(SEW) && SEW >= 8 && SEW <= 1024;
+}
+
+// Is this a LMUL value that can be encoded into the VTYPE format.
+inline static bool isValidLMUL(unsigned LMUL, bool Fractional) {
+  return isPowerOf2_32(LMUL) && LMUL <= 8 && (!Fractional || LMUL != 1);
+}
+
+// Encode VTYPE into the binary format used by the the VSETVLI instruction which
+// is used by our MC layer representation.
+//
+// Bits | Name       | Description
+// -----+------------+------------------------------------------------
+// 7    | vma        | Vector mask agnostic
+// 6    | vta        | Vector tail agnostic
+// 5:3  | vsew[2:0]  | Standard element width (SEW) setting
+// 2:0  | vlmul[2:0] | Vector register group multiplier (LMUL) setting
+inline static unsigned encodeVTYPE(RISCVVLMUL VLMUL, RISCVVSEW VSEW,
+                                   bool TailAgnostic, bool MaskAgnostic) {
+  unsigned VLMULBits = static_cast<unsigned>(VLMUL);
+  unsigned VSEWBits = static_cast<unsigned>(VSEW);
+  unsigned VTypeI = (VSEWBits << 3) | (VLMULBits & 0x7);
+  if (TailAgnostic)
+    VTypeI |= 0x40;
+  if (MaskAgnostic)
+    VTypeI |= 0x80;
+
+  return VTypeI;
+}
+
+inline static RISCVVLMUL getVLMUL(unsigned VType) {
+  unsigned VLMUL = VType & 0x7;
+  return static_cast<RISCVVLMUL>(VLMUL);
+}
+
+inline static RISCVVSEW getVSEW(unsigned VType) {
+  unsigned VSEW = (VType >> 3) & 0x7;
+  return static_cast<RISCVVSEW>(VSEW);
+}
+
+inline static bool isTailAgnostic(unsigned VType) { return VType & 0x40; }
+
+inline static bool isMaskAgnostic(unsigned VType) { return VType & 0x80; }
+
+void printVType(unsigned VType, raw_ostream &OS);
+
+} // namespace RISCVVType
+
+namespace RISCVVPseudosTable {
+
+struct PseudoInfo {
+#include "MCTargetDesc/RISCVBaseInfo.h"
+  uint16_t Pseudo;
+  uint16_t BaseInstr;
+};
+
+using namespace RISCV;
+
+#define GET_RISCVVPseudosTable_DECL
+#include "RISCVGenSearchableTables.inc"
+
+} // end namespace RISCVVPseudosTable
+
+} // namespace llvm
+
+#endif