asm/intel64/mul.cpp


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#include "mul.h"

#include "codes.h"

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

#include <asm/intel64/codes.h>

using namespace std::string_literals;

Op_mul::Op_mul(const Asm::Args& args)
{
 if (args[0].type() == typeid(Asm::Args::Register8)) { // mul reg8 (accu is ax <- al)
  machine_code = std::vector<uint8_t>{ 0xF6 } +
   ModRM("/4", std::any_cast<Asm::Args::Register8>(args[0]).name());
 } else if (args[0].type() == typeid(Asm::Args::Register32)) { // mul reg32 (accu is edx:eax <- eax)
  machine_code = std::vector<uint8_t>{ 0xF7 } +
   ModRM("/4", std::any_cast<Asm::Args::Register32>(args[0]).name());
 } else if (args[0].type() == typeid(Asm::Args::Register64)) { // mul reg64 (accu is rdx:rax <- rax)
  machine_code = REX("W") + std::vector<uint8_t>{ 0xF7 } +
   ModRM("/4", std::any_cast<Asm::Args::Register64>(args[0]).name());
 } else {
  throw std::runtime_error("Unimplemented: mul "s + args[0].type().name());
 }
}

namespace {

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

}