58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
// Copyright 2013 Dolphin Emulator Project
|
|
// Licensed under GPLv2
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#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
|
|
|
|
#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 ((1 << RAX) | (1 << RCX) | (1 << RDX) | (1 << R8) | \
|
|
(1 << R9) | (1 << R10) | (1 << R11) | \
|
|
(1 << (XMM0+16)) | (1 << (XMM1+16)) | (1 << (XMM2+16)) | (1 << (XMM3+16)) | \
|
|
(1 << (XMM4+16)) | (1 << (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 ((1 << RAX) | (1 << RCX) | (1 << RDX) | (1 << RDI) | \
|
|
(1 << RSI) | (1 << R8) | (1 << R9) | (1 << R10) | (1 << R11) | \
|
|
0xffff0000 /* xmm0..15 */)
|
|
|
|
#endif // WIN32
|
|
|
|
#define ABI_RETURN RAX
|
|
|