xref: /aoo41x/main/bridges/source/cpp_uno/s5abi_macosx_x86-64/abi.hxx (revision 6d1ed1dd)

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#ifndef _BRIDGES_CPP_UNO_X86_64_ABI_HXX_
#define _BRIDGES_CPP_UNO_X86_64_ABI_HXX_

// 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, bool bInReturn, int &nUsedGPR, int &nUsedSSE );

/** 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 );

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

} // namespace x86_64

#endif // _BRIDGES_CPP_UNO_X86_64_ABI_HXX_