// AsmJit - Machine code generation for C++
//
//  * Official AsmJit Home Page: https://asmjit.com
//  * Official Github Repository: https://github.com/asmjit/asmjit
//
// Copyright (c) 2008-2020 The AsmJit Authors
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

#include "../core/api-build_p.h"
#include "../core/arch.h"
#include "../core/func.h"
#include "../core/type.h"

#ifdef ASMJIT_BUILD_X86
  #include "../x86/x86internal_p.h"
  #include "../x86/x86operand.h"
#endif

#ifdef ASMJIT_BUILD_ARM
  #include "../arm/arminternal_p.h"
  #include "../arm/armoperand.h"
#endif

ASMJIT_BEGIN_NAMESPACE

// ============================================================================
// [asmjit::FuncDetail - Init / Reset]
// ============================================================================

ASMJIT_FAVOR_SIZE Error FuncDetail::init(const FuncSignature& signature, const Environment& environment) noexcept {
  uint32_t ccId = signature.callConv();
  uint32_t argCount = signature.argCount();

  if (ASMJIT_UNLIKELY(argCount > Globals::kMaxFuncArgs))
    return DebugUtils::errored(kErrorInvalidArgument);

  CallConv& cc = _callConv;
  ASMJIT_PROPAGATE(cc.init(ccId, environment));

  uint32_t registerSize = Environment::registerSizeFromArch(cc.arch());
  uint32_t deabstractDelta = Type::deabstractDeltaOfSize(registerSize);

  const uint8_t* args = signature.args();
  for (uint32_t i = 0; i < argCount; i++) {
    FuncValue& arg = _args[i];
    arg.initTypeId(Type::deabstract(args[i], deabstractDelta));
  }
  _argCount = uint8_t(argCount);
  _vaIndex = uint8_t(signature.vaIndex());

  uint32_t ret = signature.ret();
  if (ret != Type::kIdVoid) {
    _rets[0].initTypeId(Type::deabstract(ret, deabstractDelta));
    _retCount = 1;
  }

#ifdef ASMJIT_BUILD_X86
  if (environment.isFamilyX86())
    return x86::X86Internal::initFuncDetail(*this, signature, registerSize);
#endif

#ifdef ASMJIT_BUILD_ARM
  if (environment.isFamilyARM())
    return arm::ArmInternal::initFuncDetail(*this, signature, registerSize);
#endif

  // We should never bubble here as if `cc.init()` succeeded then there has to
  // be an implementation for the current architecture. However, stay safe.
  return DebugUtils::errored(kErrorInvalidArgument);
}

// ============================================================================
// [asmjit::FuncFrame - Init / Reset / Finalize]
// ============================================================================

ASMJIT_FAVOR_SIZE Error FuncFrame::init(const FuncDetail& func) noexcept {
#ifdef ASMJIT_BUILD_X86
  if (Environment::isFamilyX86(func.callConv().arch()))
    return x86::X86Internal::initFuncFrame(*this, func);
#endif

#ifdef ASMJIT_BUILD_ARM
  if (Environment::isFamilyARM(func.callConv().arch()))
    return arm::ArmInternal::initFuncFrame(*this, func);
#endif

  return DebugUtils::errored(kErrorInvalidArgument);
}

ASMJIT_FAVOR_SIZE Error FuncFrame::finalize() noexcept {
#ifdef ASMJIT_BUILD_X86
  if (Environment::isFamilyX86(arch()))
    return x86::X86Internal::finalizeFuncFrame(*this);
#endif

#ifdef ASMJIT_BUILD_ARM
  if (Environment::isFamilyARM(arch()))
    return arm::ArmInternal::finalizeFuncFrame(*this);
#endif

  return DebugUtils::errored(kErrorInvalidArgument);
}

// ============================================================================
// [asmjit::FuncArgsAssignment]
// ============================================================================

ASMJIT_FAVOR_SIZE Error FuncArgsAssignment::updateFuncFrame(FuncFrame& frame) const noexcept {
  uint32_t arch = frame.arch();
  const FuncDetail* func = funcDetail();

  if (!func)
    return DebugUtils::errored(kErrorInvalidState);

#ifdef ASMJIT_BUILD_X86
  if (Environment::isFamilyX86(arch))
    return x86::X86Internal::argsToFuncFrame(*this, frame);
#endif

#ifdef ASMJIT_BUILD_ARM
  if (Environment::isFamilyARM(arch))
    return arm::ArmInternal::argsToFuncFrame(*this, frame);
#endif

  return DebugUtils::errored(kErrorInvalidArch);
}

ASMJIT_END_NAMESPACE