/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
// This is an implementation of the x86-64 ABI as described in 'System V // Application Binary Interface, AMD64 Architecture Processor Supplement' // (http://www.x86-64.org/documentation/abi-0.95.pdf)
#include <typelib/typedescription.hxx>
namespace x86_64
{
/* 6 general purpose registers are used for parameter passing */ const sal_uInt32 MAX_GPR_REGS = 6;
/* 8 SSE registers are used for parameter passing */ const sal_uInt32 MAX_SSE_REGS = 8;
/* Count number of required registers.
Examine the argument and return set number of register required in each class.
Return false iff parameter should be passed in memory.
*/ bool examine_argument( typelib_TypeDescriptionReference *pTypeRef, int &nUsedGPR, int &nUsedSSE ) noexcept;
/** Does function that returns this type use a hidden parameter, or registers?
The value can be returned either in a hidden 1st parameter (which is a pointer to a structure allocated by the caller), or in registers (rax, rdx for the integers, xmm0, xmm1 for the floating point numbers).
*/ bool return_in_hidden_param( typelib_TypeDescriptionReference *pTypeRef ) noexcept;
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