From ddbeebb887cff61b087a48738650832bc62c9e83 Mon Sep 17 00:00:00 2001 From: bunnei Date: Tue, 21 Jul 2015 20:08:49 -0400 Subject: Common: Ported over boilerplate x86 JIT code from Dolphin/PPSSPP. --- src/common/abi.h | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 src/common/abi.h (limited to 'src/common/abi.h') diff --git a/src/common/abi.h b/src/common/abi.h new file mode 100644 index 000000000..bb9f7c95f --- /dev/null +++ b/src/common/abi.h @@ -0,0 +1,78 @@ +// Copyright (C) 2003 Dolphin Project. + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, version 2.0 or later versions. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License 2.0 for more details. + +// A copy of the GPL 2.0 should have been included with the program. +// If not, see http://www.gnu.org/licenses/ + +// Official SVN repository and contact information can be found at +// http://code.google.com/p/dolphin-emu/ + +#pragma once + +#include "common_types.h" + +// x86/x64 ABI:s, and helpers to help follow them when JIT-ing code. +// All convensions return values in EAX (+ possibly EDX). + +// Linux 32-bit, Windows 32-bit (cdecl, System V): +// * Caller pushes left to right +// * Caller fixes stack after call +// * function subtract from stack for local storage only. +// Scratch: EAX ECX EDX +// Callee-save: EBX ESI EDI EBP +// Parameters: - + +// 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 _M_IX86 // 32 bit calling convention, shared by all + +// 32-bit don't pass parameters in regs, but these are convenient to have anyway when we have to +// choose regs to put stuff in. +#define ABI_PARAM1 RCX +#define ABI_PARAM2 RDX + +// There are no ABI_PARAM* here, since args are pushed. +// 32-bit bog standard cdecl, shared between linux and windows +// MacOSX 32-bit is same as System V with a few exceptions that we probably don't care much about. + +#elif _M_X86_64 // 64 bit calling convention + +#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 + +#else //64-bit Unix (hopefully MacOSX too) + +#define ABI_PARAM1 RDI +#define ABI_PARAM2 RSI +#define ABI_PARAM3 RDX +#define ABI_PARAM4 RCX +#define ABI_PARAM5 R8 +#define ABI_PARAM6 R9 + +#endif // WIN32 + +#endif // X86 -- cgit v1.2.3