123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#ifndef _JIT_ABI_H
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#define _JIT_ABI_H
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#include "x64Emitter.h"
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// x86/x64 ABI:s, and helpers to help follow them when JIT-ing code.
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// All convensions return values in EAX (+ possibly EDX).
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// Linux 32-bit, Windows 32-bit (cdecl, System V):
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// * Caller pushes left to right
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// * Caller fixes stack after call
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// * function subtract from stack for local storage only.
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// Scratch: EAX ECX EDX
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// Callee-save: EBX ESI EDI EBP
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// Parameters: -
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// Windows 64-bit
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// * 4-reg "fastcall" variant, very new-skool stack handling
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// * Callee moves stack pointer, to make room for shadow regs for the biggest function _it itself calls_
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// * Parameters passed in RCX, RDX, ... further parameters are MOVed into the allocated stack space.
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// Scratch: RAX RCX RDX R8 R9 R10 R11
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// Callee-save: RBX RSI RDI RBP R12 R13 R14 R15
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// Parameters: RCX RDX R8 R9, further MOV-ed
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// Linux 64-bit
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// * 6-reg "fastcall" variant, old skool stack handling (parameters are pushed)
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// Scratch: RAX RCX RDX RSI RDI R8 R9 R10 R11
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// Callee-save: RBX RBP R12 R13 R14 R15
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// Parameters: RDI RSI RDX RCX R8 R9
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#ifdef _M_IX86
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// 32 bit calling convention, shared by all
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// 32-bit don't pass parameters in regs, but these are convenient to have anyway when we have to
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// choose regs to put stuff in.
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#define ABI_PARAM1 RCX
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#define ABI_PARAM2 RDX
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// There are no ABI_PARAM* here, since args are pushed.
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// === 32-bit bog standard cdecl, shared between linux and windows ============================
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// MacOSX 32-bit is same as System V with a few exceptions that we probably don't care much about.
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#else
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// 64 bit calling convention
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#ifdef _WIN32
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// === 64-bit Windows - the really exotic calling convention ==================================
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#define ABI_PARAM1 RCX
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#define ABI_PARAM2 RDX
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#define ABI_PARAM3 R8
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#define ABI_PARAM4 R9
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#else
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// === 64-bit Unix (hopefully MacOSX too) =====================================================
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#define ABI_PARAM1 RDI
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#define ABI_PARAM2 RSI
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#define ABI_PARAM3 RDX
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#define ABI_PARAM4 RCX
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#define ABI_PARAM5 R8
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#define ABI_PARAM6 R9
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#endif
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#endif
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// Utility functions
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// These only support u32 parameters, but that's enough for a lot of uses.
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// These will destroy the 1 or 2 first "parameter regs".
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void ABI_CallFunctionC(void *func, u32 param1);
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void ABI_CallFunctionCC(void *func, u32 param1, u32 param2);
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void ABI_CallFunctionAC(void *func, const Gen::OpArg &arg1, u32 param2);
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// Pass a register as a paremeter.
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void ABI_CallFunctionR(void *func, Gen::X64Reg reg1);
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void ABI_CallFunctionRR(void *func, Gen::X64Reg reg1, Gen::X64Reg reg2);
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// A function that doesn't have any control over what it will do to regs,
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// such as the dispatcher, should be surrounded by these.
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void ABI_PushAllCalleeSavedRegsAndAdjustStack();
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void ABI_PopAllCalleeSavedRegsAndAdjustStack();
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// A function that doesn't know anything about it's surroundings, should
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// be surrounded by these to establish a safe environment, where it can roam free.
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// An example is a backpatch injected function.
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void ABI_PushAllCallerSavedRegsAndAdjustStack();
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void ABI_PopAllCallerSavedRegsAndAdjustStack();
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unsigned int ABI_GetAlignedFrameSize(unsigned int frameSize);
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void ABI_AlignStack(unsigned int frameSize);
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void ABI_RestoreStack(unsigned int frameSize);
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// Sets up a __cdecl function.
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// Only x64 really needs the parameter.
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void ABI_EmitPrologue(int maxCallParams);
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void ABI_EmitEpilogue(int maxCallParams);
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#ifdef _M_IX86
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inline int ABI_GetNumXMMRegs() { return 8; }
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#else
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inline int ABI_GetNumXMMRegs() { return 16; }
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#endif
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#endif // _JIT_ABI_H
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