forked from dolphin-emu/dolphin
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
// Copyright 2013 Dolphin Emulator Project
|
|
// Licensed under GPLv2
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include "Common/BitSet.h"
|
|
#include "Common/x64Emitter.h"
|
|
|
|
// x64 ABI:s, and helpers to help follow them when JIT-ing code.
|
|
// All convensions return values in EAX (+ possibly EDX).
|
|
|
|
// Windows 64-bit
|
|
// * 4-reg "fastcall" variant, very new-skool stack handling
|
|
// * Callee moves stack pointer, to make room for shadow regs for the biggest function _it itself calls_
|
|
// * Parameters passed in RCX, RDX, ... further parameters are MOVed into the allocated stack space.
|
|
// Scratch: RAX RCX RDX R8 R9 R10 R11
|
|
// Callee-save: RBX RSI RDI RBP R12 R13 R14 R15
|
|
// Parameters: RCX RDX R8 R9, further MOV-ed
|
|
|
|
// Linux 64-bit
|
|
// * 6-reg "fastcall" variant, old skool stack handling (parameters are pushed)
|
|
// Scratch: RAX RCX RDX RSI RDI R8 R9 R10 R11
|
|
// Callee-save: RBX RBP R12 R13 R14 R15
|
|
// Parameters: RDI RSI RDX RCX R8 R9
|
|
|
|
#define ABI_ALL_FPRS BitSet32(0xffff0000)
|
|
#define ABI_ALL_GPRS BitSet32(0x0000ffff)
|
|
|
|
#ifdef _WIN32 // 64-bit Windows - the really exotic calling convention
|
|
|
|
#define ABI_PARAM1 RCX
|
|
#define ABI_PARAM2 RDX
|
|
#define ABI_PARAM3 R8
|
|
#define ABI_PARAM4 R9
|
|
|
|
// xmm0-xmm15 use the upper 16 bits in the functions that push/pop registers.
|
|
#define ABI_ALL_CALLER_SAVED \
|
|
(BitSet32 { RAX, RCX, RDX, R8, R9, R10, R11, \
|
|
XMM0+16, XMM1+16, XMM2+16, XMM3+16, XMM4+16, XMM5+16 })
|
|
#else //64-bit Unix / OS X
|
|
|
|
#define ABI_PARAM1 RDI
|
|
#define ABI_PARAM2 RSI
|
|
#define ABI_PARAM3 RDX
|
|
#define ABI_PARAM4 RCX
|
|
#define ABI_PARAM5 R8
|
|
#define ABI_PARAM6 R9
|
|
|
|
// FIXME: avoid pushing all 16 XMM registers when possible? most functions we call probably
|
|
// don't actually clobber them.
|
|
#define ABI_ALL_CALLER_SAVED \
|
|
(BitSet32 { RAX, RCX, RDX, RDI, RSI, R8, R9, R10, R11 } | \
|
|
ABI_ALL_FPRS)
|
|
#endif // WIN32
|
|
|
|
#define ABI_ALL_CALLEE_SAVED (~ABI_ALL_CALLER_SAVED)
|
|
|
|
#define ABI_RETURN RAX
|
|
|