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dolphin/Source/Core/Common/x64ABI.cpp

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "x64ABI.h"
#include "x64Emitter.h"
using namespace Gen;
// Shared code between Win64 and Unix64
unsigned int XEmitter::ABI_GetAlignedFrameSize(unsigned int frameSize, bool noProlog) {
// On platforms other than Windows 32-bit: At the beginning of a function,
// the stack pointer is 4/8 bytes less than a multiple of 16; however, the
// function prolog immediately subtracts an appropriate amount to align
// it, so no alignment is required around a call.
// In the functions generated by ThunkManager::ProtectFunction and some
// others, we add the necessary subtraction (and 0x20 bytes shadow space
// for Win64) into this rather than having a separate prolog.
// On Windows 32-bit, the required alignment is only 4 bytes, so we just
// ensure that the frame size isn't misaligned.
#ifdef _M_X64
// expect frameSize == 0
frameSize = noProlog ? 0x28 : 0;
#elif defined(_WIN32)
frameSize = (frameSize + 3) & -4;
#else
unsigned int existingAlignment = noProlog ? 0xc : 0;
frameSize -= existingAlignment;
frameSize = (frameSize + 15) & -16;
frameSize += existingAlignment;
#endif
return frameSize;
}
void XEmitter::ABI_AlignStack(unsigned int frameSize, bool noProlog) {
unsigned int fillSize =
ABI_GetAlignedFrameSize(frameSize, noProlog) - frameSize;
if (fillSize != 0) {
#ifdef _M_X64
SUB(64, R(RSP), Imm8(fillSize));
#else
SUB(32, R(ESP), Imm8(fillSize));
#endif
}
}
void XEmitter::ABI_RestoreStack(unsigned int frameSize, bool noProlog) {
unsigned int alignedSize = ABI_GetAlignedFrameSize(frameSize, noProlog);
if (alignedSize != 0) {
#ifdef _M_X64
ADD(64, R(RSP), Imm8(alignedSize));
#else
ADD(32, R(ESP), Imm8(alignedSize));
#endif
}
}
void XEmitter::ABI_PushRegistersAndAdjustStack(u32 mask, bool noProlog)
{
int regSize =
#ifdef _M_X64
8;
#else
4;
#endif
int shadow = 0;
#if defined(_WIN32) && defined(_M_X64)
shadow = 0x20;
#endif
int count = 0;
for (int r = 0; r < 16; r++)
{
if (mask & (1 << r))
{
PUSH((X64Reg) r);
count++;
}
}
int size = ((noProlog ? -regSize : 0) - (count * regSize)) & 0xf;
for (int x = 0; x < 16; x++)
{
if (mask & (1 << (16 + x)))
size += 16;
}
size += shadow;
if (size)
SUB(regSize * 8, R(RSP), size >= 0x80 ? Imm32(size) : Imm8(size));
int offset = shadow;
for (int x = 0; x < 16; x++)
{
if (mask & (1 << (16 + x)))
{
MOVAPD(MDisp(RSP, offset), (X64Reg) x);
offset += 16;
}
}
}
void XEmitter::ABI_PopRegistersAndAdjustStack(u32 mask, bool noProlog)
{
int regSize =
#ifdef _M_X64
8;
#else
4;
#endif
int size = 0;
#if defined(_WIN32) && defined(_M_X64)
size += 0x20;
#endif
for (int x = 0; x < 16; x++)
{
if (mask & (1 << (16 + x)))
{
MOVAPD((X64Reg) x, MDisp(RSP, size));
size += 16;
}
}
int count = 0;
for (int r = 0; r < 16; r++)
{
if (mask & (1 << r))
count++;
}
size += ((noProlog ? -regSize : 0) - (count * regSize)) & 0xf;
if (size)
ADD(regSize * 8, R(RSP), size >= 0x80 ? Imm32(size) : Imm8(size));
for (int r = 15; r >= 0; r--)
{
if (mask & (1 << r))
{
POP((X64Reg) r);
}
}
}
#ifdef _M_IX86 // All32
// Shared code between Win32 and Unix32
void XEmitter::ABI_CallFunction(void *func) {
ABI_AlignStack(0);
CALL(func);
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionC16(void *func, u16 param1) {
ABI_AlignStack(1 * 2);
PUSH(16, Imm16(param1));
CALL(func);
ABI_RestoreStack(1 * 2);
}
void XEmitter::ABI_CallFunctionCC16(void *func, u32 param1, u16 param2) {
ABI_AlignStack(1 * 2 + 1 * 4);
PUSH(16, Imm16(param2));
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(1 * 2 + 1 * 4);
}
void XEmitter::ABI_CallFunctionC(void *func, u32 param1) {
ABI_AlignStack(1 * 4);
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(1 * 4);
}
void XEmitter::ABI_CallFunctionCC(void *func, u32 param1, u32 param2) {
ABI_AlignStack(2 * 4);
PUSH(32, Imm32(param2));
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(2 * 4);
}
void XEmitter::ABI_CallFunctionCCC(void *func, u32 param1, u32 param2, u32 param3) {
ABI_AlignStack(3 * 4);
PUSH(32, Imm32(param3));
PUSH(32, Imm32(param2));
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(3 * 4);
}
void XEmitter::ABI_CallFunctionCCP(void *func, u32 param1, u32 param2, void *param3) {
ABI_AlignStack(3 * 4);
PUSH(32, Imm32((u32)param3));
PUSH(32, Imm32(param2));
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(3 * 4);
}
void XEmitter::ABI_CallFunctionCCCP(void *func, u32 param1, u32 param2,u32 param3, void *param4) {
ABI_AlignStack(4 * 4);
PUSH(32, Imm32((u32)param4));
PUSH(32, Imm32(param3));
PUSH(32, Imm32(param2));
PUSH(32, Imm32(param1));
CALL(func);
ABI_RestoreStack(4 * 4);
}
void XEmitter::ABI_CallFunctionPPC(void *func, void *param1, void *param2,u32 param3) {
ABI_AlignStack(3 * 4);
PUSH(32, Imm32(param3));
PUSH(32, Imm32((u32)param2));
PUSH(32, Imm32((u32)param1));
CALL(func);
ABI_RestoreStack(3 * 4);
}
// Pass a register as a parameter.
void XEmitter::ABI_CallFunctionR(void *func, X64Reg reg1) {
ABI_AlignStack(1 * 4);
PUSH(32, R(reg1));
CALL(func);
ABI_RestoreStack(1 * 4);
}
// Pass two registers as parameters.
void XEmitter::ABI_CallFunctionRR(void *func, Gen::X64Reg reg1, Gen::X64Reg reg2, bool noProlog)
{
ABI_AlignStack(2 * 4, noProlog);
PUSH(32, R(reg2));
PUSH(32, R(reg1));
CALL(func);
ABI_RestoreStack(2 * 4, noProlog);
}
void XEmitter::ABI_CallFunctionAC(void *func, const Gen::OpArg &arg1, u32 param2)
{
ABI_AlignStack(2 * 4);
PUSH(32, Imm32(param2));
PUSH(32, arg1);
CALL(func);
ABI_RestoreStack(2 * 4);
}
void XEmitter::ABI_CallFunctionA(void *func, const Gen::OpArg &arg1)
{
ABI_AlignStack(1 * 4);
PUSH(32, arg1);
CALL(func);
ABI_RestoreStack(1 * 4);
}
void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
PUSH(EBP);
MOV(32, R(EBP), R(ESP));
PUSH(EBX);
PUSH(ESI);
PUSH(EDI);
SUB(32, R(ESP), Imm8(0xc));
}
void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
ADD(32, R(ESP), Imm8(0xc));
POP(EDI);
POP(ESI);
POP(EBX);
POP(EBP);
}
#else //64bit
// Common functions
void XEmitter::ABI_CallFunction(void *func) {
ABI_AlignStack(0);
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionC16(void *func, u16 param1) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32((u32)param1));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionCC16(void *func, u32 param1, u16 param2) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
MOV(32, R(ABI_PARAM2), Imm32((u32)param2));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionC(void *func, u32 param1) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionCC(void *func, u32 param1, u32 param2) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
MOV(32, R(ABI_PARAM2), Imm32(param2));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionCCC(void *func, u32 param1, u32 param2, u32 param3) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
MOV(32, R(ABI_PARAM2), Imm32(param2));
MOV(32, R(ABI_PARAM3), Imm32(param3));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionCCP(void *func, u32 param1, u32 param2, void *param3) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
MOV(32, R(ABI_PARAM2), Imm32(param2));
MOV(64, R(ABI_PARAM3), Imm64((u64)param3));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionCCCP(void *func, u32 param1, u32 param2, u32 param3, void *param4) {
ABI_AlignStack(0);
MOV(32, R(ABI_PARAM1), Imm32(param1));
MOV(32, R(ABI_PARAM2), Imm32(param2));
MOV(32, R(ABI_PARAM3), Imm32(param3));
MOV(64, R(ABI_PARAM4), Imm64((u64)param4));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionPPC(void *func, void *param1, void *param2, u32 param3) {
ABI_AlignStack(0);
MOV(64, R(ABI_PARAM1), Imm64((u64)param1));
MOV(64, R(ABI_PARAM2), Imm64((u64)param2));
MOV(32, R(ABI_PARAM3), Imm32(param3));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
// Pass a register as a parameter.
void XEmitter::ABI_CallFunctionR(void *func, X64Reg reg1) {
ABI_AlignStack(0);
if (reg1 != ABI_PARAM1)
MOV(32, R(ABI_PARAM1), R(reg1));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
// Pass two registers as parameters.
void XEmitter::ABI_CallFunctionRR(void *func, X64Reg reg1, X64Reg reg2, bool noProlog) {
ABI_AlignStack(0, noProlog);
if (reg2 != ABI_PARAM1) {
if (reg1 != ABI_PARAM1)
MOV(64, R(ABI_PARAM1), R(reg1));
if (reg2 != ABI_PARAM2)
MOV(64, R(ABI_PARAM2), R(reg2));
} else {
if (reg2 != ABI_PARAM2)
MOV(64, R(ABI_PARAM2), R(reg2));
if (reg1 != ABI_PARAM1)
MOV(64, R(ABI_PARAM1), R(reg1));
}
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0, noProlog);
}
void XEmitter::ABI_CallFunctionAC(void *func, const Gen::OpArg &arg1, u32 param2)
{
ABI_AlignStack(0);
if (!arg1.IsSimpleReg(ABI_PARAM1))
MOV(32, R(ABI_PARAM1), arg1);
MOV(32, R(ABI_PARAM2), Imm32(param2));
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
void XEmitter::ABI_CallFunctionA(void *func, const Gen::OpArg &arg1)
{
ABI_AlignStack(0);
if (!arg1.IsSimpleReg(ABI_PARAM1))
MOV(32, R(ABI_PARAM1), arg1);
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL
&& distance < 0xFFFFFFFF80000000ULL) {
// Far call
MOV(64, R(RAX), Imm64((u64)func));
CALLptr(R(RAX));
} else {
CALL(func);
}
ABI_RestoreStack(0);
}
#ifdef _WIN32
// Win64 Specific Code
void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
//we only want to do this once
PUSH(RBP);
MOV(64, R(RBP), R(RSP));
PUSH(RBX);
PUSH(RSI);
PUSH(RDI);
PUSH(R12);
PUSH(R13);
PUSH(R14);
PUSH(R15);
SUB(64, R(RSP), Imm8(0x28));
//TODO: Also preserve XMM0-3?
}
void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
ADD(64, R(RSP), Imm8(0x28));
POP(R15);
POP(R14);
POP(R13);
POP(R12);
POP(RDI);
POP(RSI);
POP(RBX);
POP(RBP);
}
#else
// Unix64 Specific Code
void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
PUSH(RBP);
MOV(64, R(RBP), R(RSP));
PUSH(RBX);
PUSH(R12);
PUSH(R13);
PUSH(R14);
PUSH(R15);
SUB(64, R(RSP), Imm8(8));
}
void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
ADD(64, R(RSP), Imm8(8));
POP(R15);
POP(R14);
POP(R13);
POP(R12);
POP(RBX);
POP(RBP);
}
#endif // WIN32
#endif // 32bit
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