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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 "../DSPEmitter.h"
#include "x64Emitter.h"
#include "ABI.h"
using namespace Gen;
// HORRIBLE UGLINESS, someone please fix.
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
void DSPEmitter::increment_addr_reg(int reg)
{
ABI_PushAllCalleeSavedRegsAndAdjustStack();
// u16 tmb = g_dsp.r[DSP_REG_WR0 + reg];
MOV(16, R(EAX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
// tmb = tmb | (tmb >> 8);
MOV(16, R(EBX), R(EAX));
SHR(16, R(EBX), Imm8(8));
OR(16, R(EAX), R(EBX));
// tmb = tmb | (tmb >> 4);
MOV(16, R(EBX), R(EAX));
SHR(16, R(EBX), Imm8(4));
OR(16, R(EAX), R(EBX));
// tmb = tmb | (tmb >> 2);
MOV(16, R(EBX), R(EAX));
SHR(16, R(EBX), Imm8(2));
OR(16, R(EAX), R(EBX));
// tmb = tmb | (tmb >> 1);
MOV(16, R(EBX), R(EAX));
SHR(16, R(EBX), Imm8(1));
OR(16, R(EAX), R(EBX));
// s16 tmp = g_dsp.r[reg];
MOV(16, R(EBX), M(&g_dsp.r[reg]));
// if ((tmp & tmb) == tmb)
AND(16, R(EAX), R(EBX));
CMP(16, R(EAX), R(EBX));
FixupBranch not_equal = J_CC(CC_NZ);
// tmp ^= g_dsp.r[DSP_REG_WR0 + reg];
XOR(16, R(EBX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
FixupBranch end = J();
SetJumpTarget(not_equal);
// tmp++;
ADD(16, R(EBX), Imm8(1));
SetJumpTarget(end);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EBX));
ABI_PopAllCalleeSavedRegsAndAdjustStack();
}
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
void DSPEmitter::decrement_addr_reg(int reg)
{
ABI_PushAllCalleeSavedRegsAndAdjustStack();
// s16 tmp = g_dsp.r[reg];
MOV(16, R(EAX), M(&g_dsp.r[reg]));
// if ((tmp & g_dsp.r[DSP_REG_WR0 + reg]) == 0)
MOV(16, R(EBX), R(EAX));
AND(16, R(EBX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
CMP(16, R(EBX), Imm8(0));
FixupBranch not_equal = J_CC(CC_NZ);
// tmp |= g_dsp.r[DSP_REG_WR0 + reg];
OR(16, R(EAX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
FixupBranch end = J();
SetJumpTarget(not_equal);
// tmp--;
SUB(16, R(EAX), Imm8(1));
SetJumpTarget(end);
// g_dsp.r[reg] = tmp;
MOV(16, M(&g_dsp.r[reg]), R(EAX));
ABI_PopAllCalleeSavedRegsAndAdjustStack();
}
// Increase addr register according to the correspond ix register
void DSPEmitter::increase_addr_reg(int reg)
{
/*
MOV(16, R(EAX), M(&g_dsp.r[DSP_REG_IX0 + reg]));
CMP(16, R(EAX), Imm16(0));
FixupBranch end = J_CC(CC_Z);
FixupBranch negValue = J_CC(CC_L);
ABI_CallFunctionC((void *)increment_addr_reg, reg);
FixupBranch posValue = J();
SetJumpTarget(negValue);
ABI_CallFunctionC((void *)decrement_addr_reg, reg);
SetJumpTarget(posValue);
SetJumpTarget(end);
*/
// TODO: DO RIGHT!
s16 value = (s16)g_dsp.r[DSP_REG_IX0 + reg];
if (value > 0) {
for (int i = 0; i < value; i++) {
increment_addr_reg(reg);
}
} else if (value < 0) {
for (int i = 0; i < (int)(-value); i++) {
decrement_addr_reg(reg);
}
}
}
// Decrease addr register according to the correspond ix register
void DSPEmitter::decrease_addr_reg(int reg)
{
// TODO: DO RIGHT!
s16 value = (s16)g_dsp.r[DSP_REG_IX0 + reg];
if (value > 0) {
for (int i = 0; i < value; i++) {
decrement_addr_reg(reg);
}
} else if (value < 0) {
for (int i = 0; i < (int)(-value); i++) {
increment_addr_reg(reg);
}
}
}
void DSPEmitter::ext_dmem_write(u32 dest, u32 src)
{
u16 addr = g_dsp.r[dest];
u16 val = g_dsp.r[src];
switch (addr >> 12) {
case 0x0: // 0xxx DRAM
g_dsp.dram[addr & DSP_DRAM_MASK] = val;
break;
case 0x1: // 1xxx COEF
ERROR_LOG(DSPLLE, "Illegal write to COEF (pc = %02x)", g_dsp.pc);
break;
case 0xf: // Fxxx HW regs
// Can ext write to ifx?
// gdsp_ifx_write(addr, val);
ERROR_LOG(DSPLLE, "Illegal write to ifx (pc = %02x)", g_dsp.pc);
break;
default: // Unmapped/non-existing memory
ERROR_LOG(DSPLLE, "%04x DSP ERROR: Write to UNKNOWN (%04x) memory", g_dsp.pc, addr);
break;
}
}
u16 DSPEmitter::ext_dmem_read(u16 addr)
{
switch (addr >> 12) {
case 0x0: // 0xxx DRAM
return g_dsp.dram[addr & DSP_DRAM_MASK];
case 0x1: // 1xxx COEF
NOTICE_LOG(DSPLLE, "%04x : Coef Read @ %04x", g_dsp.pc, addr);
return g_dsp.coef[addr & DSP_COEF_MASK];
case 0xf: // Fxxx HW regs
// Can ext read from ifx?
ERROR_LOG(DSPLLE, "Illegal read from ifx (pc = %02x)", g_dsp.pc);
// return gdsp_ifx_read(addr);
default: // Unmapped/non-existing memory
ERROR_LOG(DSPLLE, "%04x DSP ERROR: Read from UNKNOWN (%04x) memory", g_dsp.pc, addr);
return 0;
}
}
#endif
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