gcc3_linux_x86-64/abi.hxx

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#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;

bool return_in_hidden_param( typelib_TypeDescriptionReference *pTypeRef ) noexcept;

enum class ReturnKind {
    Memory,
    RegistersGeneral,
    RegistersFpInt,
    RegistersIntFp
};

ReturnKind getReturnKind(typelib_TypeDescriptionReference * type) noexcept;

void fill_struct( typelib_TypeDescriptionReference *pTypeRef, const sal_uInt64* pGPR, const double* pSSE, void *pStruct ) noexcept;

} // namespace x86_64

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