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#include "stdafx.h"
#include "WindowsParams.h"
#include "Asm.h"
namespace code {
namespace x64 {
/**
* Windows version:
*/
WindowsParams::WindowsParams(Bool member) : code::Params(4, 4, 8, 16), member(member) {
setStackExtra(32); // 4 words for shadow space.
setCalleeDestroyParams(); // Callee's responsibility to destroy parameters.
unifyIntAndFpRegs(); // integers and fp registers are allocated from the same pool.
}
Reg WindowsParams::registerSrc(Nat id) const {
static Reg v[] = {
ptrC, ptrD, ptr8, ptr9,
xmm0, xmm1, xmm2, xmm3,
};
return v[id];
}
void WindowsParams::resultPrimitive(Primitive p) {
if (p.kind() == primitive::none)
resultData = Result::empty();
else if (p.kind() == primitive::real)
resultData = Result::inRegister(engine(), asSize(xmm0, p.size()));
else
resultData = Result::inRegister(engine(), asSize(ptrA, p.size()));
}
void WindowsParams::resultComplex(ComplexDesc *desc) {
Nat index = member ? 1 : 0;
addInt(index, Param(Param::returnId(), desc->size(), true, 0, true));
resultData = Result::inMemory(registerSrc(index));
}
void WindowsParams::resultSimple(SimpleDesc *desc) {
// Note: Seems like these are always passed in memory?
Nat index = member ? 1 : 0;
addInt(index, Param(Param::returnId(), desc->size(), true, 0, true));
resultData = Result::inMemory(registerSrc(index));
return;
// Old attempt here. Might still be relevant!
Nat size = desc->size().size64();
if (size == 0) {
resultData = Result::empty();
return;
}
if (size > 8) {
// Return on stack.
Nat index = member ? 1 : 0;
addInt(index, Param(Param::returnId(), desc->size(), true, 0, true));
resultData = Result::inMemory(registerSrc(index));
return;
}
// Put it in a register.
resultData = Result::inRegisters(engine(), 1);
if (size >= 8)
resultData.putRegister(rax, 0);
else if (size >= 4)
resultData.putRegister(eax, 0);
else
resultData.putRegister(al, 0);
}
void WindowsParams::addPrimitive(Nat id, Primitive p) {
switch (p.kind()) {
case primitive::none:
break;
case primitive::pointer:
case primitive::integer:
addInt(Param(id, p, true));
break;
case primitive::real:
addReal(Param(id, p, true));
break;
}
}
void WindowsParams::addComplex(Nat id, ComplexDesc *desc) {
addInt(Param(id, desc->size(), true, 0, true));
}
void WindowsParams::addSimple(Nat id, SimpleDesc *desc) {
// If they fit in a single 64-bit register, they are passed in that register.
Nat size = desc->size().size64();
if (size > 8) {
addInt(Param(id, desc->size(), true, 0, true));
} else if (size > 4) {
addInt(Param(id, Size::sLong, true, 0, false));
} else if (size > 1) {
addInt(Param(id, Size::sInt, true, 0, false));
} else {
addInt(Param(id, Size::sByte, true, 0, false));
}
}
}
}
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