#include "bsf.h"

#include "codes.h"

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

using namespace std::string_literals;

Op_bsf::Op_bsf(const Asm::Args& args)
{
 if (args[0].type() == typeid(Asm::Args::Register32) && args[1].type() == typeid(Asm::Args::Register32)) { // bsf reg32, reg32
  machine_code = std::vector<uint8_t>{ 0x0F, 0xBC } + ModRM(std::any_cast<Asm::Args::Register32>(args[0]).name(), std::any_cast<Asm::Args::Register32>(args[1]).name());

 } else if (args[0].type() == typeid(Asm::Args::Register64) && args[1].type() == typeid(Asm::Args::Register64)) { // bsf reg64, reg64
  machine_code = REX("W") + std::vector<uint8_t>{ 0x0F, 0xBC } + ModRM(std::any_cast<Asm::Args::Register64>(args[0]).name(), std::any_cast<Asm::Args::Register64>(args[1]).name());

 } else if (args[0].type() == typeid(Asm::Args::Register32) && args[1].type() == typeid(Asm::Args::Mem32Ptr64)) { // bsf reg32, [reg64]
  Asm::Args::Mem32Ptr64 ptr{std::any_cast<Asm::Args::Mem32Ptr64>(args[1])};
  machine_code = std::vector<uint8_t>{ 0x0F, 0xBC } + ModRM(std::any_cast<Asm::Args::Register32>(args[0]).name(), ptr.reg(), ptr.offs());

 } else if (args[0].type() == typeid(Asm::Args::Register64) && args[1].type() == typeid(Asm::Args::Mem64Ptr64)) { // bsf reg64, [reg64]
  Asm::Args::Mem64Ptr64 ptr{std::any_cast<Asm::Args::Mem64Ptr64>(args[1])};
  machine_code = REX("W") + std::vector<uint8_t>{ 0x0F, 0xBC } + ModRM(std::any_cast<Asm::Args::Register64>(args[0]).name(), ptr.reg(), ptr.offs());

 } else {
  throw std::runtime_error("Unimplemented: bsf "s + args[0].type().name() + " "s + args[1].type().name());
 }
}

namespace {

bool registered {
 registerOp(mangleName<Asm::Args::Register32, Asm::Args::Register32>("bsf"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
                             return std::make_shared<Op_bsf>(args);
                             }) &&
 registerOp(mangleName<Asm::Args::Register64, Asm::Args::Register64>("bsf"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
                             return std::make_shared<Op_bsf>(args);
                             }) &&
 registerOp(mangleName<Asm::Args::Register32, Asm::Args::Mem32Ptr64>("bsf"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
                             return std::make_shared<Op_bsf>(args);
                             }) &&
 registerOp(mangleName<Asm::Args::Register64, Asm::Args::Mem64Ptr64>("bsf"), [](const Asm::Args& args) -> std::shared_ptr<Op>{
                             return std::make_shared<Op_bsf>(args);
                             })
};

}