tools/llvm-exegesis/lib/CodeTemplate.cpp

   1 //===-- CodeTemplate.cpp ----------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "CodeTemplate.h"
  10
  11 namespace llvm {
  12 namespace exegesis {
  13
  14 CodeTemplate::CodeTemplate(CodeTemplate &&) = default;
  15
  16 CodeTemplate &CodeTemplate::operator=(CodeTemplate &&) = default;
  17
  18 InstructionTemplate::InstructionTemplate(const Instruction &Instr)
  19     : Instr(Instr), VariableValues(Instr.Variables.size()) {}
  20
  21 InstructionTemplate::InstructionTemplate(InstructionTemplate &&) = default;
  22
  23 InstructionTemplate &InstructionTemplate::
  24 operator=(InstructionTemplate &&) = default;
  25
  26 InstructionTemplate::InstructionTemplate(const InstructionTemplate &) = default;
  27
  28 InstructionTemplate &InstructionTemplate::
  29 operator=(const InstructionTemplate &) = default;
  30
  31 unsigned InstructionTemplate::getOpcode() const {
  32   return Instr.Description->getOpcode();
  33 }
  34
  35 llvm::MCOperand &InstructionTemplate::getValueFor(const Variable &Var) {
  36   return VariableValues[Var.getIndex()];
  37 }
  38
  39 const llvm::MCOperand &
  40 InstructionTemplate::getValueFor(const Variable &Var) const {
  41   return VariableValues[Var.getIndex()];
  42 }
  43
  44 llvm::MCOperand &InstructionTemplate::getValueFor(const Operand &Op) {
  45   return getValueFor(Instr.Variables[Op.getVariableIndex()]);
  46 }
  47
  48 const llvm::MCOperand &
  49 InstructionTemplate::getValueFor(const Operand &Op) const {
  50   return getValueFor(Instr.Variables[Op.getVariableIndex()]);
  51 }
  52
  53 bool InstructionTemplate::hasImmediateVariables() const {
  54   return llvm::any_of(Instr.Variables, [this](const Variable &Var) {
  55     return Instr.getPrimaryOperand(Var).isImmediate();
  56   });
  57 }
  58
  59 llvm::MCInst InstructionTemplate::build() const {
  60   llvm::MCInst Result;
  61   Result.setOpcode(Instr.Description->Opcode);
  62   for (const auto &Op : Instr.Operands)
  63     if (Op.isExplicit())
  64       Result.addOperand(getValueFor(Op));
  65   return Result;
  66 }
  67
  68 bool isEnumValue(ExecutionMode Execution) {
  69   return llvm::isPowerOf2_32(static_cast<uint32_t>(Execution));
  70 }
  71
  72 llvm::StringRef getName(ExecutionMode Bit) {
  73   assert(isEnumValue(Bit) && "Bit must be a power of two");
  74   switch (Bit) {
  75   case ExecutionMode::UNKNOWN:
  76     return "UNKNOWN";
  77   case ExecutionMode::ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS:
  78     return "ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS";
  79   case ExecutionMode::ALWAYS_SERIAL_TIED_REGS_ALIAS:
  80     return "ALWAYS_SERIAL_TIED_REGS_ALIAS";
  81   case ExecutionMode::SERIAL_VIA_MEMORY_INSTR:
  82     return "SERIAL_VIA_MEMORY_INSTR";
  83   case ExecutionMode::SERIAL_VIA_EXPLICIT_REGS:
  84     return "SERIAL_VIA_EXPLICIT_REGS";
  85   case ExecutionMode::SERIAL_VIA_NON_MEMORY_INSTR:
  86     return "SERIAL_VIA_NON_MEMORY_INSTR";
  87   case ExecutionMode::ALWAYS_PARALLEL_MISSING_USE_OR_DEF:
  88     return "ALWAYS_PARALLEL_MISSING_USE_OR_DEF";
  89   case ExecutionMode::PARALLEL_VIA_EXPLICIT_REGS:
  90     return "PARALLEL_VIA_EXPLICIT_REGS";
  91   }
  92   llvm_unreachable("Missing enum case");
  93 }
  94
  95 llvm::ArrayRef<ExecutionMode> getAllExecutionBits() {
  96   static const ExecutionMode kAllExecutionModeBits[] = {
  97       ExecutionMode::ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS,
  98       ExecutionMode::ALWAYS_SERIAL_TIED_REGS_ALIAS,
  99       ExecutionMode::SERIAL_VIA_MEMORY_INSTR,
 100       ExecutionMode::SERIAL_VIA_EXPLICIT_REGS,
 101       ExecutionMode::SERIAL_VIA_NON_MEMORY_INSTR,
 102       ExecutionMode::ALWAYS_PARALLEL_MISSING_USE_OR_DEF,
 103       ExecutionMode::PARALLEL_VIA_EXPLICIT_REGS,
 104   };
 105   return llvm::makeArrayRef(kAllExecutionModeBits);
 106 }
 107
 108 llvm::SmallVector<ExecutionMode, 4>
 109 getExecutionModeBits(ExecutionMode Execution) {
 110   llvm::SmallVector<ExecutionMode, 4> Result;
 111   for (const auto Bit : getAllExecutionBits())
 112     if ((Execution & Bit) == Bit)
 113       Result.push_back(Bit);
 114   return Result;
 115 }
 116
 117 } // namespace exegesis
 118 } // namespace llvm