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 MCOperand &InstructionTemplate::getValueFor(const Variable &Var) {
  36   return VariableValues[Var.getIndex()];
  37 }
  38
  39 const MCOperand &InstructionTemplate::getValueFor(const Variable &Var) const {
  40   return VariableValues[Var.getIndex()];
  41 }
  42
  43 MCOperand &InstructionTemplate::getValueFor(const Operand &Op) {
  44   return getValueFor(Instr.Variables[Op.getVariableIndex()]);
  45 }
  46
  47 const MCOperand &InstructionTemplate::getValueFor(const Operand &Op) const {
  48   return getValueFor(Instr.Variables[Op.getVariableIndex()]);
  49 }
  50
  51 bool InstructionTemplate::hasImmediateVariables() const {
  52   return any_of(Instr.Variables, [this](const Variable &Var) {
  53     return Instr.getPrimaryOperand(Var).isImmediate();
  54   });
  55 }
  56
  57 MCInst InstructionTemplate::build() const {
  58   MCInst Result;
  59   Result.setOpcode(Instr.Description->Opcode);
  60   for (const auto &Op : Instr.Operands)
  61     if (Op.isExplicit())
  62       Result.addOperand(getValueFor(Op));
  63   return Result;
  64 }
  65
  66 bool isEnumValue(ExecutionMode Execution) {
  67   return isPowerOf2_32(static_cast<uint32_t>(Execution));
  68 }
  69
  70 StringRef getName(ExecutionMode Bit) {
  71   assert(isEnumValue(Bit) && "Bit must be a power of two");
  72   switch (Bit) {
  73   case ExecutionMode::UNKNOWN:
  74     return "UNKNOWN";
  75   case ExecutionMode::ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS:
  76     return "ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS";
  77   case ExecutionMode::ALWAYS_SERIAL_TIED_REGS_ALIAS:
  78     return "ALWAYS_SERIAL_TIED_REGS_ALIAS";
  79   case ExecutionMode::SERIAL_VIA_MEMORY_INSTR:
  80     return "SERIAL_VIA_MEMORY_INSTR";
  81   case ExecutionMode::SERIAL_VIA_EXPLICIT_REGS:
  82     return "SERIAL_VIA_EXPLICIT_REGS";
  83   case ExecutionMode::SERIAL_VIA_NON_MEMORY_INSTR:
  84     return "SERIAL_VIA_NON_MEMORY_INSTR";
  85   case ExecutionMode::ALWAYS_PARALLEL_MISSING_USE_OR_DEF:
  86     return "ALWAYS_PARALLEL_MISSING_USE_OR_DEF";
  87   case ExecutionMode::PARALLEL_VIA_EXPLICIT_REGS:
  88     return "PARALLEL_VIA_EXPLICIT_REGS";
  89   }
  90   llvm_unreachable("Missing enum case");
  91 }
  92
  93 ArrayRef<ExecutionMode> getAllExecutionBits() {
  94   static const ExecutionMode kAllExecutionModeBits[] = {
  95       ExecutionMode::ALWAYS_SERIAL_IMPLICIT_REGS_ALIAS,
  96       ExecutionMode::ALWAYS_SERIAL_TIED_REGS_ALIAS,
  97       ExecutionMode::SERIAL_VIA_MEMORY_INSTR,
  98       ExecutionMode::SERIAL_VIA_EXPLICIT_REGS,
  99       ExecutionMode::SERIAL_VIA_NON_MEMORY_INSTR,
 100       ExecutionMode::ALWAYS_PARALLEL_MISSING_USE_OR_DEF,
 101       ExecutionMode::PARALLEL_VIA_EXPLICIT_REGS,
 102   };
 103   return makeArrayRef(kAllExecutionModeBits);
 104 }
 105
 106 SmallVector<ExecutionMode, 4> getExecutionModeBits(ExecutionMode Execution) {
 107   SmallVector<ExecutionMode, 4> Result;
 108   for (const auto Bit : getAllExecutionBits())
 109     if ((Execution & Bit) == Bit)
 110       Result.push_back(Bit);
 111   return Result;
 112 }
 113
 114 } // namespace exegesis
 115 } // namespace llvm