440 lines
8.0 KiB
C++
440 lines
8.0 KiB
C++
/*====================================================================
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filename: gdsp_interpreter.cpp
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project: GCemu
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created: 2004-6-18
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mail: duddie@walla.com
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Copyright (c) 2005 Duddie & Tratax
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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 for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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====================================================================*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "DSPTables.h"
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#include "gdsp_interface.h"
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#include "gdsp_opcodes_helper.h"
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#include "Tools.h"
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//-------------------------------------------------------------------------------
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SDSP g_dsp;
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u16 SDSP::r[32];
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u16 SDSP::pc = 0;
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u16 SDSP::err_pc = 0;
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u16* SDSP::iram = 0;
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u16* SDSP::dram = 0;
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u16* SDSP::irom = 0;
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u16* SDSP::drom = 0;
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u16* SDSP::coef = 0;
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u8* SDSP::cpu_ram = 0;
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u16 SDSP::cr = 0;
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u8 SDSP::reg_stack_ptr[4];
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// lets make stack depth to 32 for now
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u16 SDSP::reg_stack[4][DSP_STACK_DEPTH];
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void (*SDSP::irq_request)() = NULL;
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bool SDSP::exception_in_progress_hack = false;
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// for debugger only
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bool SDSP::dump_imem = false;
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u32 SDSP::iram_crc = 0;
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u64 SDSP::step_counter = 0;
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//-------------------------------------------------------------------------------
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static bool CR_HALT = true;
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static bool CR_EXTERNAL_INT = false;
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void UpdateCachedCR()
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{
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CR_HALT = (g_dsp.cr & 0x4) != 0;
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CR_EXTERNAL_INT = (g_dsp.cr & 0x02) != 0;
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}
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//-------------------------------------------------------------------------------
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void dbg_error(char* err_msg)
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{
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return;
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}
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void gdsp_init()
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{
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g_dsp.irom = (u16*)malloc(DSP_IROM_SIZE * sizeof(u16));
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g_dsp.iram = (u16*)malloc(DSP_IRAM_SIZE * sizeof(u16));
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g_dsp.drom = (u16*)malloc(DSP_DROM_SIZE * sizeof(u16));
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g_dsp.dram = (u16*)malloc(DSP_DRAM_SIZE * sizeof(u16));
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g_dsp.coef = (u16*)malloc(DSP_COEF_SIZE * sizeof(u16));
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for (int i = 0; i < DSP_IRAM_SIZE; i++)
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{
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g_dsp.iram[i] = 0x0021; // HALT opcode
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}
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for (int i = 0; i < DSP_DRAM_SIZE; i++)
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{
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g_dsp.dram[i] = 0x0021; // HALT opcode
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}
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for (int i = 0; i < 32; i++)
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{
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g_dsp.r[i] = 0;
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}
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for (int i = 0; i < 4; i++)
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{
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g_dsp.reg_stack_ptr[i] = 0;
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for (int j = 0; j < DSP_STACK_DEPTH; j++)
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{
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g_dsp.reg_stack[i][j] = 0;
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}
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}
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// copied from a real console after the custom UCode has been loaded
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g_dsp.r[0x08] = 0xffff;
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g_dsp.r[0x09] = 0xffff;
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g_dsp.r[0x0a] = 0xffff;
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g_dsp.r[0x0b] = 0xffff;
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g_dsp.cr = 0x804;
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gdsp_ifx_init();
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UpdateCachedCR();
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}
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void gdsp_reset()
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{
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// _assert_msg_(0, "gdsp_reset()");
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_assert_msg_(MASTER_LOG, !g_dsp.exception_in_progress_hack, "assert while exception");
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g_dsp.pc = DSP_RESET_VECTOR;
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g_dsp.exception_in_progress_hack = false;
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}
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u8 gdsp_exceptions = 0;
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void gdsp_generate_exception(u8 level)
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{
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gdsp_exceptions |= 1 << level;
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}
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bool gdsp_load_rom(char* fname)
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{
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FILE* pFile = fopen(fname, "rb");
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if (pFile)
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{
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fread(g_dsp.irom, 1, DSP_IRAM_SIZE, pFile);
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fclose(pFile);
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return(true);
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}
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return(false);
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}
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bool gdsp_load_coef(char* fname)
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{
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FILE* pFile = fopen(fname, "rb");
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if (pFile)
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{
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fread(g_dsp.coef, 1, DSP_COEF_SIZE, pFile);
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fclose(pFile);
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return(true);
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}
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return(false);
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}
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void gdsp_write_cr(u16 val)
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{
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// reset
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if (val & 0x0001)
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{
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gdsp_reset();
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}
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val &= ~0x0001;
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// update cr
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g_dsp.cr = val;
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UpdateCachedCR();
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}
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u16 gdsp_read_cr()
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{
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if (g_dsp.pc & 0x8000)
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{
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g_dsp.cr |= 0x800;
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}
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else
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{
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g_dsp.cr &= ~0x800;
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}
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UpdateCachedCR();
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return(g_dsp.cr);
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}
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// special loop step.. because exception in loop or loopi fails
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// dunno how we have to fix it
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// atm we execute this instructions directly inside the loop command
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// so it cant be interrupted by an exception
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void gdsp_loop_step()
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{
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g_dsp.err_pc = g_dsp.pc;
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u16 opc = dsp_fetch_code();
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ComputeInstruction(UDSPInstruction(opc));
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}
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u16 HLE_ROM_80E7_81F8();
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void hacks();
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void gdsp_step()
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{
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g_dsp.step_counter++;
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if (g_dsp.pc == 0x80e7)
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{
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//g_dsp.pc = HLE_ROM_80E7_81F8();
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}
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g_dsp.err_pc = g_dsp.pc;
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#if PROFILE
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ProfilerAddDelta(g_dsp.err_pc, 1);
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if (g_dsp.step_counter == 1)
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{
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ProfilerInit();
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}
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if ((g_dsp.step_counter & 0xFFFFF) == 0)
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{
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ProfilerDump(g_dsp.step_counter);
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}
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#endif
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u16 opc = dsp_fetch_code();
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ComputeInstruction(UDSPInstruction(opc));
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u16& rLoopCounter = g_dsp.r[DSP_REG_ST0 + 3];
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if (rLoopCounter > 0)
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{
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const u16& rCallAddress = g_dsp.r[DSP_REG_ST0 + 0];
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const u16& rLoopAddress = g_dsp.r[DSP_REG_ST0 + 2];
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if (g_dsp.pc == (rLoopAddress + 1))
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{
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rLoopCounter--;
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if (rLoopCounter > 0)
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{
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g_dsp.pc = rCallAddress;
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}
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else
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{
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// end of loop
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dsp_reg_load_stack(0);
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dsp_reg_load_stack(2);
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dsp_reg_load_stack(3);
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}
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}
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}
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// check if there is an external interrupt
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if (CR_EXTERNAL_INT)
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{
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if (dsp_SR_is_flag_set(FLAG_ENABLE_INTERUPT) && (g_dsp.exception_in_progress_hack == false))
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{
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// level 7 is the interrupt exception
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gdsp_generate_exception(7);
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g_dsp.cr &= ~0x0002;
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UpdateCachedCR();
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}
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}
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// check exceptions
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if ((gdsp_exceptions > 0) && (!g_dsp.exception_in_progress_hack))
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{
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for (u8 i=0; i<8; i++)
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{
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if (gdsp_exceptions & (1<<i))
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{
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_assert_msg_(MASTER_LOG, !g_dsp.exception_in_progress_hack, "assert while exception");
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dsp_reg_store_stack(DSP_STACK_C, g_dsp.pc);
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dsp_reg_store_stack(DSP_STACK_D, g_dsp.r[R_SR]);
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g_dsp.pc = i * 2;
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gdsp_exceptions &= ~(1<<i);
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g_dsp.exception_in_progress_hack = true;
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break;
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}
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}
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}
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}
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bool gdsp_running;
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extern volatile u32 dsp_running;
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bool gdsp_run()
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{
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gdsp_running = true;
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while (!CR_HALT)
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{
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gdsp_step();
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if(!gdsp_running)
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break;
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}
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gdsp_running = false;
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return(true);
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}
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bool gdsp_runx(u16 cnt)
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{
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gdsp_running = true;
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while (!(g_dsp.cr & 0x4) && gdsp_running)
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{
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gdsp_step();
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cnt--;
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if (cnt == 0)
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{
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break;
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}
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}
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gdsp_running = false;
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return(true);
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}
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void gdsp_stop()
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{
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gdsp_running = false;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// From fires for fires :)
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//
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//
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#include "disassemble.h"
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//#include "WaveFile.h"
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#include "Mixer.h"
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u16 r30 = 0, r31 = 0;
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//extern WaveFileWriter g_wave_writer;
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extern u16 dsp_swap16(u16 x);
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void Hacks()
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{
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// if (g_wave_writer.GetAudioSize() > 1024*1024*1)
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/* if (g_dsp.pc == 0x165)
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{
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PanicAlert("Opcode_06");
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}
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if (g_dsp.pc == 0x43b)
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{
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PanicAlert("Opcode_14");
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}
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if (g_dsp.pc == 0xb37)
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{
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PanicAlert("Opcode_08");
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}*/
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/* if (g_dsp.pc == 0x1bc)
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{
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r30 = g_dsp.r[30];
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r31 = g_dsp.r[31];
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}
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else if (g_dsp.pc == 0x384)
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{
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// if ((r30 == 0x1bc) && (r31 == 0xaff))
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{
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//PanicAlert("%x, %x", r30, r31);
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const int numSamples = 0x280;
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static short Buffer[numSamples];
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u16 bufferAddr = 0x280; //dsp_dmem_read(0xe44);
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for (int i=0; i<numSamples; i++)
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{
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Buffer[i] = dsp_dmem_read(bufferAddr+i);
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}
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g_wave_writer.AddStereoSamples(Buffer, numSamples/2); // 2 channels
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if (g_wave_writer.GetAudioSize() > 1024*1024*2)
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{
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//PanicAlert("%x", bufferAddr);
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g_wave_writer.Stop();
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exit(1);
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}
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}
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} */
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if (g_dsp.pc == 0x468)
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{
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int numSamples = g_dsp.r[25] / 2;
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u16 bufferAddr = g_dsp.r[27];
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// PanicAlert("%x %x", bufferAddr, numSamples);
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short samples[1024];
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for (int i=0; i<numSamples; i++)
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{
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samples[i] = dsp_dmem_read(bufferAddr+i);
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}
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soundStream->GetMixer()->PushSamples(samples, numSamples / 2, 32000); //sample_rate);
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// g_wave_writer.AddStereoSamples(samples, numSamples/2); // 2 channels
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// if (g_wave_writer.GetAudioSize() > 1024*1024*2)
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// {
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//PanicAlert("%x", bufferAddr);
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// g_wave_writer.Stop();
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// exit(1);
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// }
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}
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}
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