private unsafe void GetSimpleLoc(int offset, ArgLocDesc* pLoc)
{
// WRAPPER_NO_CONTRACT;
pLoc->Init();
pLoc->m_idxGenReg = TransitionBlock.GetArgumentIndexFromOffset(offset);
pLoc->m_cGenReg = 1;
}
// Get layout information for the argument that the ArgIterator is currently visiting.
private unsafe void GetArgLoc(int argOffset, ArgLocDesc* pLoc)
{
// LIMITED_METHOD_CONTRACT;
pLoc->Init();
if (TransitionBlock.IsFloatArgumentRegisterOffset(argOffset))
{
// Dividing by 8 as size of each register in FloatArgumentRegisters is 8 bytes.
pLoc->m_idxFloatReg = (argOffset - TransitionBlock.GetOffsetOfFloatArgumentRegisters()) / 8;
if (!_argTypeHandle.IsNull() && _argTypeHandle.IsHFA())
{
CorElementType type = _argTypeHandle.GetHFAType();
pLoc->m_cFloatReg = (type == CorElementType.ELEMENT_TYPE_R4) ? GetArgSize() / sizeof(float) : GetArgSize() / sizeof(double);
}
else
{
pLoc->m_cFloatReg = 1;
}
return;
}
int cSlots = (GetArgSize() + 7) / 8;
// Composites greater than 16bytes are passed by reference
TypeHandle dummy;
if (GetArgType(out dummy) == CorElementType.ELEMENT_TYPE_VALUETYPE && GetArgSize() > ArchitectureConstants.ENREGISTERED_PARAMTYPE_MAXSIZE)
{
cSlots = 1;
}
if (!TransitionBlock.IsStackArgumentOffset(argOffset))
{
pLoc->m_idxGenReg = TransitionBlock.GetArgumentIndexFromOffset(argOffset);
pLoc->m_cGenReg = cSlots;
}
else
{
pLoc->m_idxStack = TransitionBlock.GetArgumentIndexFromOffset(argOffset) - 8;
pLoc->m_cStack = cSlots;
}
}
// Get layout information for the argument that the ArgIterator is currently visiting.
unsafe void GetArgLoc(int argOffset, ArgLocDesc* pLoc)
{
// LIMITED_METHOD_CONTRACT;
pLoc->Init();
if (TransitionBlock.IsFloatArgumentRegisterOffset(argOffset))
{
// Dividing by 8 as size of each register in FloatArgumentRegisters is 8 bytes.
pLoc->m_idxFloatReg = (argOffset - TransitionBlock.GetOffsetOfFloatArgumentRegisters()) / 8;
// UNIXTODO: Passing of structs, HFAs. For now, use the Windows convention.
pLoc->m_cFloatReg = 1;
return;
}
// UNIXTODO: Passing of structs, HFAs. For now, use the Windows convention.
int cSlots = 1;
if (!TransitionBlock.IsStackArgumentOffset(argOffset))
{
pLoc->m_idxGenReg = TransitionBlock.GetArgumentIndexFromOffset(argOffset);
pLoc->m_cGenReg = cSlots;
}
else
{
pLoc->m_idxStack = (argOffset - TransitionBlock.GetOffsetOfArgs()) / 8;
pLoc->m_cStack = cSlots;
}
}
// Get layout information for the argument that the ArgIterator is currently visiting.
private unsafe void GetArgLoc(int argOffset, ArgLocDesc* pLoc)
{
// LIMITED_METHOD_CONTRACT;
pLoc->Init();
pLoc->m_fRequires64BitAlignment = _fRequires64BitAlignment;
int cSlots = (GetArgSize() + 3) / 4;
if (TransitionBlock.IsFloatArgumentRegisterOffset(argOffset))
{
pLoc->m_idxFloatReg = (argOffset - TransitionBlock.GetOffsetOfFloatArgumentRegisters()) / 4;
pLoc->m_cFloatReg = cSlots;
return;
}
if (!TransitionBlock.IsStackArgumentOffset(argOffset))
{
pLoc->m_idxGenReg = TransitionBlock.GetArgumentIndexFromOffset(argOffset);
if (cSlots <= (4 - pLoc->m_idxGenReg))
{
pLoc->m_cGenReg = cSlots;
}
else
{
pLoc->m_cGenReg = 4 - pLoc->m_idxGenReg;
pLoc->m_idxStack = 0;
pLoc->m_cStack = cSlots - pLoc->m_cGenReg;
}
}
else
{
pLoc->m_idxStack = TransitionBlock.GetArgumentIndexFromOffset(argOffset) - 4;
pLoc->m_cStack = cSlots;
}
}
public unsafe void GetVASigCookieLoc(ArgLocDesc* pLoc) { GetSimpleLoc(GetVASigCookieOffset(), pLoc); }
public unsafe void GetParamTypeLoc(ArgLocDesc* pLoc) { GetSimpleLoc(GetParamTypeArgOffset(), pLoc); }
public unsafe void GetRetBuffArgLoc(ArgLocDesc* pLoc) { GetSimpleLoc(GetRetBuffArgOffset(), pLoc); }
// Accessors for built in argument descriptions of the special implicit parameters not mentioned directly
// in signatures (this pointer and the like). Whether or not these can be used successfully before all the
// explicit arguments have been scanned is platform dependent.
public unsafe void GetThisLoc(ArgLocDesc* pLoc) { GetSimpleLoc(GetThisOffset(), pLoc); }
