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#pragma once
#include "Code/Params.h"
namespace code {
namespace x64 {
STORM_PKG(core.asm.x64);
/**
* Implements the logic for laying out parameters on the stack and into registers, assuming
* Windows ABI.
*
* The following rules apply on X86-64:
* - The first four integer or pointer arguments are passed in registers:
* RCX, RDX, R8, R9
* - The first six floating-point arguments are passed in registers:
* XMM0, XMM1, XMM2, XMM3, XMM4, XMM5
* - Parameters that do not fit in registers are passed on the stack: passed by
* pointer. Note: documentation states that these should be 16-byte aligned.
* - Trivially copiable classes might be decomposed and returned in a single register.
*/
class WindowsParams : public code::Params {
STORM_CLASS;
public:
// Create an empty layout.
STORM_CTOR WindowsParams(Bool member);
// Get the register containing the parameter.
Reg STORM_FN registerSrc(Nat n) const;
protected:
void STORM_FN resultPrimitive(Primitive p);
void STORM_FN resultComplex(ComplexDesc *desc);
void STORM_FN resultSimple(SimpleDesc *desc);
void STORM_FN addPrimitive(Nat id, Primitive p);
void STORM_FN addComplex(Nat id, ComplexDesc *desc);
void STORM_FN addSimple(Nat id, SimpleDesc *desc);
private:
// Is this a member function?
Bool member;
};
}
}
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