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// Copyright (C) 2010 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.
// 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/
#ifndef _DSP_JIT_UTIL_H
#define _DSP_JIT_UTIL_H
#include "../DSPMemoryMap.h"
#include "../DSPHWInterface.h"
#include "../DSPEmitter.h"
#include "x64Emitter.h"
#include "ABI.h"
using namespace Gen;
// Performs the hashing required by increment/increase/decrease_addr_reg
void DSPEmitter::ToMask(X64Reg value_reg, X64Reg temp_reg)
{
MOV(16, R(temp_reg), R(value_reg));
SHR(16, R(temp_reg), Imm8(8));
OR(16, R(value_reg), R(temp_reg));
MOV(16, R(temp_reg), R(value_reg));
SHR(16, R(temp_reg), Imm8(4));
OR(16, R(value_reg), R(temp_reg));
MOV(16, R(temp_reg), R(value_reg));
SHR(16, R(temp_reg), Imm8(2));
OR(16, R(value_reg), R(temp_reg));
MOV(16, R(temp_reg), R(value_reg));
SHR(16, R(temp_reg), Imm8(1));
OR(16, R(value_reg), R(temp_reg));
}
// HORRIBLE UGLINESS, someone please fix.
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
// EAX = g_dsp.r[reg]
// EDX = g_dsp.r[DSP_REG_WR0 + reg]
void DSPEmitter::increment_addr_reg(int reg)
{
// s16 tmp = g_dsp.r[reg];
MOV(16, R(EAX), M(&g_dsp.r[reg]));
MOV(16, R(EDX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
//ToMask(WR0), calculating it into EDI
MOV(16, R(EDI), R(EDX));
ToMask(EDI);
// if ((tmp & tmb) == tmb)
MOV(16, R(ESI), R(EAX));
AND(16, R(ESI), R(EDI));
CMP(16, R(ESI), R(EDI));
FixupBranch not_equal = J_CC(CC_NE);
// tmp ^= wr_reg
XOR(16, R(EAX), R(EDX));
FixupBranch end = J();
SetJumpTarget(not_equal);
// else tmp++
ADD(16, R(EAX), Imm16(1));
SetJumpTarget(end);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EAX));
}
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
// EAX = g_dsp.r[reg]
// EDX = g_dsp.r[DSP_REG_WR0 + reg]
void DSPEmitter::decrement_addr_reg(int reg)
{
// s16 tmp = g_dsp.r[reg];
MOV(16, R(EAX), M(&g_dsp.r[reg]));
MOV(16, R(EDX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
// if ((tmp & g_dsp.r[DSP_REG_WR0 + reg]) == 0)
TEST(16, R(EAX), R(EDX));
FixupBranch not_equal = J_CC(CC_NZ);
// tmp |= g_dsp.r[DSP_REG_WR0 + reg];
OR(16, R(EAX), R(EDX));
FixupBranch end = J();
SetJumpTarget(not_equal);
// tmp--;
SUB(16, R(EAX), Imm16(1));
SetJumpTarget(end);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EAX));
}
// Increase addr register according to the correspond ix register
// EAX = g_dsp.r[reg]
// ECX = g_dsp.r[DSP_REG_IX0 + reg]
// EDX = g_dsp.r[DSP_REG_WR0 + reg]
// EDI = tomask(EDX)
void DSPEmitter::increase_addr_reg(int reg)
{
MOV(16, R(ECX), M(&g_dsp.r[DSP_REG_IX0 + reg]));
//IX0 == 0, bail out
TEST(16, R(ECX), R(ECX));
FixupBranch end = J_CC(CC_Z);
MOV(16, R(EAX), M(&g_dsp.r[reg]));
MOV(16, R(EDX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
//IX0 > 0
FixupBranch neg = J_CC(CC_L);
//ToMask(WR0), calculating it into EDI
MOV(16, R(EDI), R(EDX));
ToMask(EDI);
//dsp_increment
JumpTarget loop_pos = GetCodePtr();
// if ((tmp & tmb) == tmb)
MOV(16, R(ESI), R(EAX));
AND(16, R(ESI), R(EDI));
CMP(16, R(ESI), R(EDI));
FixupBranch pos_neq = J_CC(CC_NE);
// tmp ^= wr_reg
XOR(16, R(EAX), R(EDX));
FixupBranch pos_eq = J();
SetJumpTarget(pos_neq);
// else tmp++
ADD(16, R(EAX), Imm16(1));
SetJumpTarget(pos_eq);
SUB(16, R(ECX), Imm16(1)); // value--
CMP(16, R(ECX), Imm16(0)); // value > 0
J_CC(CC_G, loop_pos);
FixupBranch end_pos = J();
//else, IX0 < 0
SetJumpTarget(neg);
JumpTarget loop_neg = GetCodePtr();
//dsp_decrement
// if ((tmp & wr_reg) == 0)
TEST(16, R(EAX), R(EDX));
FixupBranch neg_nz = J_CC(CC_NZ);
// tmp |= wr_reg;
OR(16, R(EAX), R(EDX));
FixupBranch neg_z = J();
SetJumpTarget(neg_nz);
// else tmp--
SUB(16, R(EAX), Imm16(1));
SetJumpTarget(neg_z);
ADD(16, R(ECX), Imm16(1)); // value++
CMP(16, R(ECX), Imm16(0)); // value < 0
J_CC(CC_L, loop_neg);
SetJumpTarget(end_pos);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EAX));
SetJumpTarget(end);
}
// Decrease addr register according to the correspond ix register
// EAX = g_dsp.r[reg]
// ECX = g_dsp.r[DSP_REG_IX0 + reg]
// EDX = g_dsp.r[DSP_REG_WR0 + reg]
// EDI = tomask(EDX)
void DSPEmitter::decrease_addr_reg(int reg)
{
MOV(16, R(ECX), M(&g_dsp.r[DSP_REG_IX0 + reg]));
//IX0 == 0, bail out
TEST(16, R(ECX), R(ECX));
FixupBranch end = J_CC(CC_Z);
MOV(16, R(EAX), M(&g_dsp.r[reg]));
MOV(16, R(EDX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
//IX0 > 0
FixupBranch neg = J_CC(CC_L);
JumpTarget loop_pos = GetCodePtr();
//dsp_decrement
// if ((tmp & wr_reg) == 0)
TEST(16, R(EAX), R(EDX));
FixupBranch neg_nz = J_CC(CC_NZ);
// tmp |= wr_reg;
OR(16, R(EAX), R(EDX));
FixupBranch neg_z = J();
SetJumpTarget(neg_nz);
// else tmp--
SUB(16, R(EAX), Imm16(1));
SetJumpTarget(neg_z);
SUB(16, R(ECX), Imm16(1)); // value--
CMP(16, R(ECX), Imm16(0)); // value > 0
J_CC(CC_G, loop_pos);
FixupBranch end_pos = J();
//else, IX0 < 0
SetJumpTarget(neg);
//ToMask(WR0), calculating it into EDI
MOV(16, R(EDI), R(EDX));
ToMask(EDI);
JumpTarget loop_neg = GetCodePtr();
//dsp_increment
// if ((tmp & tmb) == tmb)
MOV(16, R(ESI), R(EAX));
AND(16, R(ESI), R(EDI));
CMP(16, R(ESI), R(EDI));
FixupBranch pos_neq = J_CC(CC_NE);
// tmp ^= wr_reg
XOR(16, R(EAX), R(EDX));
FixupBranch pos_eq = J();
SetJumpTarget(pos_neq);
// else tmp++
ADD(16, R(EAX), Imm16(1));
SetJumpTarget(pos_eq);
ADD(16, R(ECX), Imm16(1)); // value++
CMP(16, R(ECX), Imm16(0)); // value < 0
J_CC(CC_L, loop_neg);
SetJumpTarget(end_pos);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EAX));
SetJumpTarget(end);
}
// EAX - destination address (g_dsp.r[dest])
// ECX - value (g_dsp.r[src])
// ESI - the upper bits of the address (>> 12)
void DSPEmitter::ext_dmem_write(u32 dest, u32 src)
{
// u16 addr = g_dsp.r[dest];
MOVZX(32, 16, EAX, M(&g_dsp.r[dest]));
// u16 val = g_dsp.r[src];
MOVZX(32, 16, ECX, M(&g_dsp.r[src]));
// u16 saddr = addr >> 12;
MOV(32, R(ESI), R(EAX));
SHR(16, R(ESI), Imm8(12));
// if (saddr == 0)
TEST(16, R(ESI), R(ESI));
FixupBranch ifx = J_CC(CC_NZ);
// g_dsp.dram[addr & DSP_DRAM_MASK] = val;
AND(16, R(EAX), Imm16(DSP_DRAM_MASK));
SHL(16, R(EAX), Imm8(1)); // * sizeof(u16)
#ifdef _M_X64
MOV(64, R(R11), Imm64((u64)g_dsp.dram));
ADD(64, R(EAX), R(R11));
#else
ADD(32, R(EAX), Imm32((u32)g_dsp.dram));
#endif
MOV(16, MDisp(EAX,0), R(ECX));
FixupBranch end = J();
// else if (saddr == 0xf)
SetJumpTarget(ifx);
// Does it mean gdsp_ifx_write needs u32 rather than u16?
ABI_CallFunctionRR((void *)gdsp_ifx_write, EAX, ECX);
SetJumpTarget(end);
}
// EAX - the result of the read (used by caller)
// ECX - the address to read
// ESI - the upper bits of the address (>> 12)
void DSPEmitter::ext_dmem_read(u16 addr)
{
// u16 addr = g_dsp.r[addr];
MOVZX(32, 16, ECX, M(&g_dsp.r[addr]));
// u16 saddr = addr >> 12;
MOV(32, R(ESI), R(ECX));
SHR(16, R(ESI), Imm8(12));
// if (saddr == 0)
TEST(16, R(ESI), R(ESI));
FixupBranch dram = J_CC(CC_NZ);
// return g_dsp.dram[addr & DSP_DRAM_MASK];
AND(16, R(ECX), Imm16(DSP_DRAM_MASK));
SHL(16, R(ECX), Imm8(1)); // * sizeof(u16)
#ifdef _M_X64
MOV(64, R(R11), Imm64((u64)g_dsp.dram));
ADD(64, R(ECX), R(R11));
#else
ADD(32, R(ECX), Imm32((u32)g_dsp.dram));
#endif
MOV(16, R(EAX), MDisp(ECX,0));
FixupBranch end = J();
SetJumpTarget(dram);
// else if (saddr == 0x1)
CMP(16, R(ESI), Imm16(0x1));
FixupBranch ifx = J_CC(CC_NZ);
// return g_dsp.coef[addr & DSP_COEF_MASK];
AND(16, R(ECX), Imm16(DSP_COEF_MASK));
SHL(16, R(ECX), Imm8(1)); // * sizeof(u16)
#ifdef _M_X64
MOV(64, R(R11), Imm64((u64)g_dsp.dram));
ADD(64, R(ECX), R(R11));
#else
ADD(32, R(ECX), Imm32((u32)g_dsp.dram));
#endif
MOV(16, R(EAX), MDisp(ECX,0));
FixupBranch end2 = J();
SetJumpTarget(ifx);
// else if (saddr == 0xf)
// return gdsp_ifx_read(addr);
ABI_CallFunctionR((void *)gdsp_ifx_read, ECX);
SetJumpTarget(end);
SetJumpTarget(end2);
}
#endif
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