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dolphin/Source/Plugins/Plugin_DSP_LLE/Src/disassemble.cpp

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/*====================================================================
filename: disassemble.cpp
project: GameCube DSP Tool (gcdsp)
created: 2005.03.04
mail: duddie@walla.com
Copyright (c) 2005 Duddie
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; either version 2
of the License, or (at your option) any later version.
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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
====================================================================*/
#include <stdio.h>
#include <memory.h>
#include <stdlib.h>
#include "Globals.h"
#include "disassemble.h"
#include "opcodes.h"
// #include "gdsp_tool.h"
#ifdef _MSC_VER
#pragma warning(disable:4996)
#endif
uint32 unk_opcodes[0x10000];
uint16 swap16(uint16 x);
// predefined labels
typedef struct pdlabel_t
{
uint16 addr;
const char* name;
const char* description;
} pdlabels_t;
const pdlabel_t pdlabels[] =
{
{0xffa0, "COEF_A1_0", "COEF_A1_0",},
{0xffa1, "COEF_A2_0", "COEF_A2_0",},
{0xffa2, "COEF_A1_1", "COEF_A1_1",},
{0xffa3, "COEF_A2_1", "COEF_A2_1",},
{0xffa4, "COEF_A1_2", "COEF_A1_2",},
{0xffa5, "COEF_A2_2", "COEF_A2_2",},
{0xffa6, "COEF_A1_3", "COEF_A1_3",},
{0xffa7, "COEF_A2_3", "COEF_A2_3",},
{0xffa8, "COEF_A1_4", "COEF_A1_4",},
{0xffa9, "COEF_A2_4", "COEF_A2_4",},
{0xffaa, "COEF_A1_5", "COEF_A1_5",},
{0xffab, "COEF_A2_5", "COEF_A2_5",},
{0xffac, "COEF_A1_6", "COEF_A1_6",},
{0xffad, "COEF_A2_6", "COEF_A2_6",},
{0xffae, "COEF_A1_7", "COEF_A1_7",},
{0xffaf, "COEF_A2_7", "COEF_A2_7",},
{0xffc9, "DSCR", "DSP DMA Control Reg",},
{0xffcb, "DSBL", "DSP DMA Block Length",},
{0xffcd, "DSPA", "DSP DMA DMEM Address",},
{0xffce, "DSMAH", "DSP DMA Mem Address H",},
{0xffcf, "DSMAL", "DSP DMA Mem Address L",},
{0xffd1, "SampleFormat", "SampleFormat",},
{0xffd3, "Unk Zelda", "Unk Zelda writes to it",},
{0xffd4, "ACSAH", "Accelerator start address H",},
{0xffd5, "ACSAL", "Accelerator start address L",},
{0xffd6, "ACEAH", "Accelerator end address H",},
{0xffd7, "ACEAL", "Accelerator end address L",},
{0xffd8, "ACCAH", "Accelerator current address H",},
{0xffd9, "ACCAL", "Accelerator current address L",},
{0xffda, "pred_scale", "pred_scale",},
{0xffdb, "yn1", "yn1",},
{0xffdc, "yn2", "yn2",},
{0xffdd, "ARAM", "Direct Read from ARAM (uses ADPCM)",},
{0xffde, "GAIN", "Gain",},
{0xffef, "AMDM", "ARAM DMA Request Mask",},
{0xfffb, "DIRQ", "DSP IRQ Request",},
{0xfffc, "DMBH", "DSP Mailbox H",},
{0xfffd, "DMBL", "DSP Mailbox L",},
{0xfffe, "CMBH", "CPU Mailbox H",},
{0xffff, "CMBL", "CPU Mailbox L",},
};
pdlabel_t regnames[] =
{
{0x00, "R00", "Register 00",},
{0x01, "R01", "Register 01",},
{0x02, "R02", "Register 02",},
{0x03, "R03", "Register 03",},
{0x04, "R04", "Register 04",},
{0x05, "R05", "Register 05",},
{0x06, "R06", "Register 06",},
{0x07, "R07", "Register 07",},
{0x08, "R08", "Register 08",},
{0x09, "R09", "Register 09",},
{0x0a, "R10", "Register 10",},
{0x0b, "R11", "Register 11",},
{0x0c, "ST0", "Call stack",},
{0x0d, "ST1", "Data stack",},
{0x0e, "ST2", "Loop address stack",},
{0x0f, "ST3", "Loop counter",},
{0x00, "ACH0", "Accumulator High 0",},
{0x11, "ACH1", "Accumulator High 1",},
{0x12, "CR", "Config Register",},
{0x13, "SR", "Special Register",},
{0x14, "PROD.L", "PROD L",},
{0x15, "PROD.M1", "PROD M1",},
{0x16, "PROD.H", "PROD H",},
{0x17, "PROD.M2", "PROD M2",},
{0x18, "AX0.L", "Additional Accumulators Low 0",},
{0x19, "AX1.L", "Additional Accumulators Low 1",},
{0x1a, "AX0.H", "Additional Accumulators High 0",},
{0x1b, "AX1.H", "Additional Accumulators High 1",},
{0x1c, "AC0.L", "Register 28",},
{0x1d, "AC1.L", "Register 29",},
{0x1e, "AC0.M", "Register 00",},
{0x1f, "AC1.M", "Register 00",},
// additional to resolve special names
{0x20, "ACC0", "Accumulators 0",},
{0x21, "ACC1", "Accumulators 1",},
{0x22, "AX0", "Additional Accumulators 0",},
{0x23, "AX1", "Additional Accumulators 1",},
};
const char* pdname(uint16 val)
{
static char tmpstr[12]; // nasty
for (int i = 0; i < (int)(sizeof(pdlabels) / sizeof(pdlabel_t)); i++)
{
if (pdlabels[i].addr == val)
{
return(pdlabels[i].name);
}
}
sprintf(tmpstr, "0x%04x", val);
return(tmpstr);
}
char* gd_dis_params(gd_globals_t* gdg, opc_t* opc, uint16 op1, uint16 op2, char* strbuf)
{
char* buf = strbuf;
uint32 val;
int j;
for (j = 0; j < opc->param_count; j++)
{
if (j > 0)
{
sprintf(buf, ", ");
buf += strlen(buf);
}
if (opc->params[j].loc >= 1)
{
val = op2;
}
else
{
val = op1;
}
val &= opc->params[j].mask;
if (opc->params[j].lshift < 0)
{
val = val << (-opc->params[j].lshift);
}
else
{
val = val >> opc->params[j].lshift;
}
uint32 type;
type = opc->params[j].type;
if (type & P_REG)
{
if (type == P_ACCM_D)
{
val = (~val & 0x1) | ((type & P_REGS_MASK) >> 8);
}
else
{
val |= (type & P_REGS_MASK) >> 8;
}
type &= ~P_REGS_MASK;
}
switch (type)
{
case P_REG:
if (gdg->decode_registers){sprintf(buf, "$%s", regnames[val].name);}
else {sprintf(buf, "$%d", val);}
break;
case P_PRG:
if (gdg->decode_registers){sprintf(buf, "@$%s", regnames[val].name);}
else {sprintf(buf, "@$%d", val);}
break;
case P_VAL:
sprintf(buf, "0x%04x", val);
break;
case P_IMM:
if (opc->params[j].size != 2)
{
sprintf(buf, "#0x%02x", val);
}
else
{
sprintf(buf, "#0x%04x", val);
}
break;
case P_MEM:
if (opc->params[j].size != 2)
{
val = (uint16)(sint8)val;
}
if (gdg->decode_names)
{
sprintf(buf, "@%s", pdname(val));
}
else
{
sprintf(buf, "@0x%04x", val);
}
break;
default:
ErrorLog("Unknown parameter type: %x\n", opc->params[j].type);
exit(-1);
break;
}
buf += strlen(buf);
}
return(strbuf);
}
gd_globals_t* gd_init()
{
gd_globals_t* gdg = (gd_globals_t*)malloc(sizeof(gd_globals_t));
memset(gdg, 0, sizeof(gd_globals_t));
return(gdg);
}
uint16 gd_dis_get_opcode_size(gd_globals_t* gdg)
{
opc_t* opc = 0;
opc_t* opc_ext = 0;
bool extended;
if ((gdg->pc & 0x7fff) >= 0x1000)
{
return(1);
}
uint32 op1 = swap16(gdg->binbuf[gdg->pc & 0x0fff]);
for (uint32 j = 0; j < opcodes_size; j++)
{
uint16 mask;
if (opcodes[j].size & P_EXT)
{
mask = opcodes[j].opcode_mask & 0xff00;
}
else
{
mask = opcodes[j].opcode_mask;
}
if ((op1 & mask) == opcodes[j].opcode)
{
opc = &opcodes[j];
break;
}
}
if (!opc)
{
ErrorLog("get_opcode_size ARGH");
exit(0);
}
if (opc->size & P_EXT && op1 & 0x00ff)
{
extended = true;
}
else
{
extended = false;
}
if (extended)
{
// opcode has an extension
// find opcode
for (uint32 j = 0; j < opcodes_ext_size; j++)
{
if ((op1 & opcodes_ext[j].opcode_mask) == opcodes_ext[j].opcode)
{
opc_ext = &opcodes_ext[j];
break;
}
}
if (!opc_ext)
{
ErrorLog("get_opcode_size ext ARGH");
}
return(opc_ext->size);
}
return(opc->size & ~P_EXT);
}
char* gd_dis_opcode(gd_globals_t* gdg)
{
uint32 j;
uint32 op1, op2;
opc_t* opc = NULL;
opc_t* opc_ext = NULL;
uint16 pc;
char* buf = gdg->buffer;
bool extended;
pc = gdg->pc;
*buf = '\0';
if ((pc & 0x7fff) >= 0x1000)
{
gdg->pc++;
return(gdg->buffer);
}
pc &= 0x0fff;
op1 = swap16(gdg->binbuf[pc]);
// find opcode
for (j = 0; j < opcodes_size; j++)
{
uint16 mask;
if (opcodes[j].size & P_EXT)
{
mask = opcodes[j].opcode_mask & 0xff00;
}
else
{
mask = opcodes[j].opcode_mask;
}
if ((op1 & mask) == opcodes[j].opcode)
{
opc = &opcodes[j];
break;
}
}
if (opc->size & P_EXT && op1 & 0x00ff)
{
extended = true;
}
else
{
extended = false;
}
if (extended)
{
// opcode has an extension
// find opcode
for (j = 0; j < opcodes_ext_size; j++)
{
if ((op1 & opcodes_ext[j].opcode_mask) == opcodes_ext[j].opcode)
{
opc_ext = &opcodes_ext[j];
break;
}
}
}
// printing
if (gdg->show_pc){sprintf(buf, "%04x ", gdg->pc);}
buf += strlen(buf);
if ((opc->size & ~P_EXT) == 2)
{
op2 = swap16(gdg->binbuf[pc + 1]);
if (gdg->show_hex){sprintf(buf, "%04x %04x ", op1, op2);}
}
else
{
op2 = 0;
if (gdg->show_hex){sprintf(buf, "%04x ", op1);}
}
buf += strlen(buf);
char tmpbuf[20];
if (extended)
{
sprintf(tmpbuf, "%s%c%s", opc->name, gdg->ext_separator, opc_ext->name);
}
else
{
sprintf(tmpbuf, "%s", opc->name);
}
if (gdg->print_tabs)
{
sprintf(buf, "%s\t", tmpbuf);
}
else
{
sprintf(buf, "%-12s", tmpbuf);
}
buf += strlen(buf);
if (opc->param_count > 0)
{
gd_dis_params(gdg, opc, op1, op2, buf);
}
buf += strlen(buf);
if (extended)
{
if (opc->param_count > 0)
{
sprintf(buf, " ");
}
buf += strlen(buf);
sprintf(buf, ": ");
buf += strlen(buf);
if (opc_ext->param_count > 0)
{
gd_dis_params(gdg, opc_ext, op1, op2, buf);
}
buf += strlen(buf);
}
if (opc->opcode_mask == 0)
{
// unknown opcode
unk_opcodes[op1]++;
sprintf(buf, "\t\t; *** UNKNOWN OPCODE ***");
}
if (extended)
{
gdg->pc += opc_ext->size;
}
else
{
gdg->pc += opc->size & ~P_EXT;
}
return(gdg->buffer);
}
bool gd_dis_file(gd_globals_t* gdg, char* name, FILE* output)
{
FILE* in;
uint32 size;
in = fopen(name, "rb");
if (in == NULL)
{
return(false);
}
fseek(in, 0, SEEK_END);
size = ftell(in);
fseek(in, 0, SEEK_SET);
gdg->binbuf = (uint16*)malloc(size);
fread(gdg->binbuf, 1, size, in);
gdg->buffer = (char*)malloc(256);
gdg->buffer_size = 256;
for (gdg->pc = 0; gdg->pc < (size / 2);)
{
fprintf(output, "%s\n", gd_dis_opcode(gdg));
}
fclose(in);
free(gdg->binbuf);
gdg->binbuf = NULL;
free(gdg->buffer);
gdg->buffer = NULL;
gdg->buffer_size = 0;
return(true);
}
void gd_dis_close_unkop()
{
FILE* uo;
int i, j;
uint32 count = 0;
uo = fopen("uo.bin", "wb");
if (uo)
{
fwrite(unk_opcodes, 1, sizeof(unk_opcodes), uo);
fclose(uo);
}
uo = fopen("unkopc.txt", "w");
if (uo)
{
for (i = 0; i < 0x10000; i++)
{
if (unk_opcodes[i])
{
count++;
fprintf(uo, "OP%04x\t%d", i, unk_opcodes[i]);
for (j = 15; j >= 0; j--)
{
if ((j & 0x3) == 3)
{
fprintf(uo, "\tb");
}
fprintf(uo, "%d", (i >> j) & 0x1);
}
fprintf(uo, "\n");
}
}
fprintf(uo, "Unknown opcodes count: %d\n", count);
fclose(uo);
}
}
void gd_dis_open_unkop()
{
FILE* uo;
uo = fopen("uo.bin", "rb");
if (uo)
{
fread(unk_opcodes, 1, sizeof(unk_opcodes), uo);
fclose(uo);
}
else
{
int i;
for (i = 0; i < 0x10000; i++)
{
unk_opcodes[i] = 0;
}
}
}
const char* gd_dis_get_reg_name(uint16 reg)
{
return(regnames[reg].name);
}
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