asm/intel64/dec.cpp


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#include "dec.h"

#include "codes.h"

#include <asm/assembler.h>
#include <asm/operators.h>

#include <asm/intel64/codes.h>

using namespace std::string_literals;

Op_dec::Op_dec(Asm::Args& args)
{
 if (args[0].type() == typeid(Asm::Args::Register8)) { // dec reg8
  machine_code = std::vector<uint8_t>{ 0xFE } +
   ModRM("/1", std::any_cast<Asm::Args::Register8>(args[0]).name());
 } else if (args[0].type() == typeid(Asm::Args::Register32)) { // dec reg32
  machine_code = std::vector<uint8_t>{ 0xFF } +
   ModRM("/1", std::any_cast<Asm::Args::Register32>(args[0]).name());
 } else if (args[0].type() == typeid(Asm::Args::Register64)) { // dec reg64
  machine_code = REX("W") + std::vector<uint8_t>{ 0xFF } +
   ModRM("/1", std::any_cast<Asm::Args::Register64>(args[0]).name());
 } else {
  throw std::runtime_error("Unimplemented: dec "s + args[0].type().name());
 }
}

namespace {

bool registered {
 registerOp(mangleName<Asm::Args::Register8>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
               return std::make_shared<Op_dec>(args);
            }) &&
 registerOp(mangleName<Asm::Args::Register32>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
               return std::make_shared<Op_dec>(args);
            }) &&
 registerOp(mangleName<Asm::Args::Register64>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
               return std::make_shared<Op_dec>(args);
            })
};

}