gcc3_linux_loongarch64/abi.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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 *
 * 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 .
 */
 
#include <sal/config.h>
 
#include "abi.hxx"
 
int loongarch64::flatten_struct(typelib_TypeDescription* pTypeDescr, Registers& regs)
{
    const typelib_CompoundTypeDescription* p
        = reinterpret_cast<const typelib_CompoundTypeDescription*>(pTypeDescr);
    int sum = p->nMembers;
    for (sal_Int32 i = 0; i < p->nMembers; ++i)
    {
        typelib_TypeDescriptionReference* pTypeInStruct = p->ppTypeRefs[i];
 
        switch (pTypeInStruct->eTypeClass)
        {
            case typelib_TypeClass_STRUCT:
            {
                typelib_TypeDescription* t = 0;
                TYPELIB_DANGER_GET(&t, pTypeInStruct);
                sum--;
                sum += flatten_struct(t, regs);
                TYPELIB_DANGER_RELEASE(t);
            }
            break;
            case typelib_TypeClass_CHAR:
            case typelib_TypeClass_BOOLEAN:
            case typelib_TypeClass_BYTE:
            case typelib_TypeClass_SHORT:
            case typelib_TypeClass_UNSIGNED_SHORT:
            case typelib_TypeClass_LONG:
            case typelib_TypeClass_UNSIGNED_LONG:
            case typelib_TypeClass_HYPER:
            case typelib_TypeClass_UNSIGNED_HYPER:
            case typelib_TypeClass_ENUM:
                regs.nr_int++;
                if (!regs.priorInt && !regs.priorFp)
                    regs.priorInt = true;
                break;
            case typelib_TypeClass_FLOAT:
            case typelib_TypeClass_DOUBLE:
                regs.nr_fp++;
                if (!regs.priorInt && !regs.priorFp)
                    regs.priorFp = true;
                break;
            default:
                break;
        }
    }
    return sum;
}
 
loongarch64::ReturnKind loongarch64::getReturnKind(typelib_TypeDescriptionReference* pTypeRef)
{
    switch (pTypeRef->eTypeClass)
    {
        case typelib_TypeClass_CHAR:
        case typelib_TypeClass_BOOLEAN:
        case typelib_TypeClass_BYTE:
        case typelib_TypeClass_SHORT:
        case typelib_TypeClass_UNSIGNED_SHORT:
        case typelib_TypeClass_LONG:
        case typelib_TypeClass_UNSIGNED_LONG:
        case typelib_TypeClass_HYPER:
        case typelib_TypeClass_UNSIGNED_HYPER:
        case typelib_TypeClass_ENUM:
            return ReturnKind::RegistersInt;
        case typelib_TypeClass_FLOAT:
        case typelib_TypeClass_DOUBLE:
            return ReturnKind::RegistersFp;
        case typelib_TypeClass_STRUCT:
        {
            Registers regs = { 0, 0, false, false };
            typelib_TypeDescription* pTypeDescr = nullptr;
            TYPELIB_DANGER_GET(&pTypeDescr, pTypeRef);
            int sum = flatten_struct(pTypeDescr, regs);
            TYPELIB_DANGER_RELEASE(pTypeDescr);
            if ((sum == 1 || sum == 2) && sum == regs.nr_fp)
                return ReturnKind::RegistersFp;
            if (sum == 2 && regs.nr_fp == regs.nr_int)
            {
                if (regs.priorInt)
                    return ReturnKind::RegistersIntFp;
                if (regs.priorFp)
                    return ReturnKind::RegistersFpInt;
            }
            return ReturnKind::RegistersInt;
        }
        default:
            return ReturnKind::RegistersInt;
    }
}
 
void loongarch64::fillReturn(typelib_TypeDescriptionReference* pTypeRef, sal_Int64* gret,
                             double* fret, void* pRegisterReturn)
{
    ReturnKind returnKind = getReturnKind(pTypeRef);
    switch (returnKind)
    {
        case ReturnKind::RegistersFp:
            reinterpret_cast<double*>(pRegisterReturn)[0] = fret[0];
            reinterpret_cast<double*>(pRegisterReturn)[1] = fret[1];
            break;
        case ReturnKind::RegistersFpInt:
            reinterpret_cast<double*>(pRegisterReturn)[0] = fret[0];
            reinterpret_cast<sal_Int64*>(pRegisterReturn)[1] = gret[0];
            break;
        case ReturnKind::RegistersIntFp:
            reinterpret_cast<sal_Int64*>(pRegisterReturn)[0] = gret[0];
            reinterpret_cast<double*>(pRegisterReturn)[1] = fret[0];
            break;
        default:
            reinterpret_cast<sal_Int64*>(pRegisterReturn)[0] = gret[0];
            reinterpret_cast<sal_Int64*>(pRegisterReturn)[1] = gret[1];
            break;
    }
}
 
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