libretro/beetle-psx-libretro
1
0
Fork 0
mirror of https://github.com/libretro/beetle-psx-libretro.git synced 2024-11-23 16:59:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
c6eaa44060
beetle-psx-libretro/mednafen/psx/dis.cpp

414 lines
12 KiB
C++
Raw Blame History

/* Mednafen - Multi-system Emulator
*
* 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 "psx.h"
struct OpEntry
{
uint32 mask;
uint32 value;
const char *mnemonic;
const char *format;
};
#define MASK_OP (0x3FU << 26)
#define MASK_FUNC (0x3FU)
#define MASK_RS (0x1FU << 21)
#define MASK_RT (0x1FU << 16)
#define MASK_RD (0x1FU << 11)
#define MASK_SA (0x1FU << 6)
#define MK_OP(mnemonic, format, op, func, extra_mask) { MASK_OP | (op ? 0 : MASK_FUNC) | extra_mask, ((unsigned)op << 26) | func, mnemonic, format }
#define MK_OP_REGIMM(mnemonic, regop_mask, regop) { MASK_OP | (regop_mask << 16), (0x01U << 26) | (regop << 16), mnemonic, "s, p" }
#define MK_COPZ(z) { MASK_OP | (0x1U << 25), (0x1U << 25) | ((0x10U | z) << 26), "cop" #z, "F" }
#define MK_COP0_FUNC(mnemonic, func) { MASK_OP | (0x1U << 25) | MASK_FUNC, (0x10U << 26) | (0x1U << 25) | func, mnemonic, "" }
#define MK_COPZ_XFER(z, mnemonic, format, xf) { MASK_OP | (0x1FU << 21), ((0x10U | z) << 26) | (xf << 21), mnemonic, format }
#define MK_COPZ_BCzx(z, x) { MASK_OP | (0x1BU << 21) | (0x01 << 16), ((0x10U | z) << 26) | (0x08 << 21) | (x << 16), (x ? "bc" #z "t" : "bc" #z "f"), "p" }
#define MK_COPZ_BC(z) MK_COPZ_BCzx(z, 0), MK_COPZ_BCzx(z, 1)
#define MK_GTE(mnemonic, format, func) { MASK_OP | (0x1U << 25) | MASK_FUNC, (0x1U << 25) | (0x12U << 26) | func, mnemonic, format }
static OpEntry ops[] =
{
MK_OP("nop", "", 0, 0, MASK_RT | MASK_RD | MASK_SA),
//
//
//
MK_OP("sll", "d, t, a", 0, 0, 0),
MK_OP("srl", "d, t, a", 0, 2, 0),
MK_OP("sra", "d, t, a", 0, 3, 0),
MK_OP("sllv", "d, t, s", 0, 4, 0),
MK_OP("srlv", "d, t, s", 0, 6, 0),
MK_OP("srav", "d, t, s", 0, 7, 0),
MK_OP("jr", "s", 0, 8, 0),
MK_OP("jalr", "d, s", 0, 9, 0),
MK_OP("syscall", "", 0, 12, 0), // TODO
MK_OP("break", "", 0, 13, 0), // TODO
MK_OP("mfhi", "d", 0, 16, 0),
MK_OP("mthi", "s", 0, 17, 0),
MK_OP("mflo", "d", 0, 18, 0),
MK_OP("mtlo", "s", 0, 19, 0),
MK_OP("mult", "s, t", 0, 24, 0),
MK_OP("multu", "s, t", 0, 25, 0),
MK_OP("div", "s, t", 0, 26, 0),
MK_OP("divu", "s, t", 0, 27, 0),
MK_OP("add", "d, s, t", 0, 32, 0),
MK_OP("addu", "d, s, t", 0, 33, 0),
MK_OP("sub", "d, s, t", 0, 34, 0),
MK_OP("subu", "d, s, t", 0, 35, 0),
MK_OP("and", "d, s, t", 0, 36, 0),
MK_OP("or", "d, s, t", 0, 37, 0),
MK_OP("xor", "d, s, t", 0, 38, 0),
MK_OP("nor", "d, s, t", 0, 39, 0),
MK_OP("slt", "d, s, t", 0, 42, 0),
MK_OP("sltu", "d, s, t", 0, 43, 0),
/* keep *al before the non-linking versions, due to mask setup. */
MK_OP_REGIMM("bgezal", 0x1F, 0x11),
MK_OP_REGIMM("bltzal", 0x1F, 0x10),
MK_OP_REGIMM("bgez", 0x01, 0x01),
MK_OP_REGIMM("bltz", 0x00, 0x00),
MK_OP("j", "P", 2, 0, 0),
MK_OP("jal", "P", 3, 0, 0),
MK_OP("beq", "s, t, p", 4, 0, 0),
MK_OP("bne", "s, t, p", 5, 0, 0),
MK_OP("blez", "s, p", 6, 0, 0),
MK_OP("bgtz", "s, p", 7, 0, 0),
MK_OP("addi", "t, s, i", 8, 0, 0),
MK_OP("addiu", "t, s, i", 9, 0, 0),
MK_OP("slti", "t, s, i", 10, 0, 0),
MK_OP("sltiu", "t, s, i", 11, 0, 0),
MK_OP("andi", "t, s, z", 12, 0, 0),
MK_OP("ori", "t, s, z", 13, 0, 0),
MK_OP("xori", "t, s, z", 14, 0, 0),
MK_OP("lui", "t, z", 15, 0, 0),
MK_COPZ_XFER(0, "mfc0", "t, 0", 0x00),
MK_COPZ_XFER(1, "mfc1", "t, ?", 0x00),
MK_COPZ_XFER(2, "mfc2", "t, g", 0x00),
MK_COPZ_XFER(3, "mfc3", "t, ?", 0x00),
MK_COPZ_XFER(0, "mtc0", "t, 0", 0x04),
MK_COPZ_XFER(1, "mtc1", "t, ?", 0x04),
MK_COPZ_XFER(2, "mtc2", "t, g", 0x04),
MK_COPZ_XFER(3, "mtc3", "t, ?", 0x04),
MK_COPZ_XFER(0, "cfc0", "t, ?", 0x02),
MK_COPZ_XFER(1, "cfc1", "t, ?", 0x02),
MK_COPZ_XFER(2, "cfc2", "t, G", 0x02),
MK_COPZ_XFER(3, "cfc3", "t, ?", 0x02),
MK_COPZ_XFER(0, "ctc0", "t, ?", 0x06),
MK_COPZ_XFER(1, "ctc1", "t, ?", 0x06),
MK_COPZ_XFER(2, "ctc2", "t, G", 0x06),
MK_COPZ_XFER(3, "ctc3", "t, ?", 0x06),
MK_COPZ_BC(0),
MK_COPZ_BC(1),
MK_COPZ_BC(2),
MK_COPZ_BC(3),
// COP0 stuff here
MK_COP0_FUNC("rfe", 0x10),
MK_OP("lwc0", "?, i(s)", 0x30, 0, 0),
MK_OP("lwc1", "?, i(s)", 0x31, 0, 0),
MK_OP("lwc2", "h, i(s)", 0x32, 0, 0),
MK_OP("lwc3", "?, i(s)", 0x33, 0, 0),
MK_OP("swc0", "?, i(s)", 0x38, 0, 0),
MK_OP("swc1", "?, i(s)", 0x39, 0, 0),
MK_OP("swc2", "h, i(s)", 0x3A, 0, 0),
MK_OP("swc3", "?, i(s)", 0x3B, 0, 0),
MK_OP("lb", "t, i(s)", 0x20, 0, 0),
MK_OP("lh", "t, i(s)", 0x21, 0, 0),
MK_OP("lwl", "t, i(s)", 0x22, 0, 0),
MK_OP("lw", "t, i(s)", 0x23, 0, 0),
MK_OP("lbu", "t, i(s)", 0x24, 0, 0),
MK_OP("lhu", "t, i(s)", 0x25, 0, 0),
MK_OP("lwr", "t, i(s)", 0x26, 0, 0),
MK_OP("sb", "t, i(s)", 0x28, 0, 0),
MK_OP("sh", "t, i(s)", 0x29, 0, 0),
MK_OP("swl", "t, i(s)", 0x2A, 0, 0),
MK_OP("sw", "t, i(s)", 0x2B, 0, 0),
MK_OP("swr", "t, i(s)", 0x2E, 0, 0),
//
// GTE specific instructions
//
// sf mx v cv lm
//
MK_GTE("rtps", "#sf# #lm#", 0x00),
MK_GTE("rtps", "#sf# #lm#", 0x01),
MK_GTE("nclip", "", 0x06),
MK_GTE("op", "#sf# #lm#", 0x0C),
MK_GTE("dpcs", "#sf# #lm#", 0x10),
MK_GTE("intpl", "#sf# #lm#", 0x11),
MK_GTE("mvmva", "#sf# #mx# #v# #cv# #lm#", 0x12),
MK_GTE("ncds", "#sf# #lm#", 0x13),
MK_GTE("cdp", "#sf# #lm#", 0x14),
MK_GTE("ncdt", "#sf# #lm#", 0x16),
MK_GTE("dcpl", "#sf# #lm#", 0x1A),
MK_GTE("nccs", "#sf# #lm#", 0x1B),
MK_GTE("cc", "#sf# #lm#", 0x1C),
MK_GTE("ncs", "#sf# #lm#", 0x1E),
MK_GTE("nct", "#sf# #lm#", 0x20),
MK_GTE("sqr", "#sf# #lm#", 0x28),
MK_GTE("dcpl", "#sf# #lm#", 0x29),
MK_GTE("dpct", "#sf# #lm#", 0x2A),
MK_GTE("avsz3", "", 0x2D),
MK_GTE("avsz4", "", 0x2E),
MK_GTE("rtpt", "#sf# #lm#", 0x30),
MK_GTE("gpf", "#sf# #lm#", 0x3D),
MK_GTE("gpl", "#sf# #lm#", 0x3E),
MK_GTE("ncct", "#sf# #lm#", 0x3F),
//
//
//
MK_COPZ(0),
MK_COPZ(1),
MK_COPZ(2),
MK_COPZ(3),
{ 0, 0, NULL, NULL }
};
std::string DisassembleMIPS(uint32 PC, uint32 instr)
{
std::string ret = "UNKNOWN";
unsigned int rs = (instr >> 21) & 0x1F;
unsigned int rt = (instr >> 16) & 0x1F;
unsigned int rd = (instr >> 11) & 0x1F;
unsigned int shamt = (instr >> 6) & 0x1F;
unsigned int immediate = (int32)(int16)(instr & 0xFFFF);
unsigned int immediate_ze = (instr & 0xFFFF);
unsigned int jt = instr & ((1 << 26) - 1);
static const char *gpr_names[32] =
{
"r0", "at", "v0", "v1", "a0", "a1", "a2", "a3", "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", "t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra"
};
static const char *cop0_names[32] =
{
"CPR0", "CPR1", "CPR2", "BPC", "CPR4", "BDA", "TAR", "DCIC", "BADVA", "BDAM", "CPR10", "BPCM", "SR", "CAUSE", "EPC", "PRID",
"CPR16", "CPR17", "CPR18", "CPR19", "CPR20", "CPR21", "CPR22", "CPR23", "CPR24", "CPR25", "CPR26", "CPR27", "CPR28", "CPR29", "CPR30", "CPR31"
};
static const char *gte_cr_names[32] =
{
"R11R12", "R13R21", "R22R23", "R31R32", "R33", "TRX", "TRY", "TRZ", "L11L12", "L13L21", "L22L23", "L31L32", "L33", "RBK", "GBK", "BBK",
"LR1LR2", "LR3LG1", "LG2LG3", "LB1LB2", "LB3", "RFC", "GFC", "BFC", "OFX", "OFY", "H", "DQA", "DQB", "ZSF3", "ZSF4", "FLAG"
};
static const char *gte_dr_names[32] =
{
"VXY0", "VZ0", "VXY1", "VZ1", "VXY2", "VZ2", "RGB", "OTZ", "IR0", "IR1", "IR2", "IR3", "SXY0", "SXY1", "SXY2", "SXYP",
"SZ0", "SZ1", "SZ2", "SZ3", "RGB0", "RGB1", "RGB2", "RES1", "MAC0", "MAC1", "MAC2", "MAC3", "IRGB", "ORGB", "LZCS", "LZCR"
};
OpEntry *op = ops;
while(op->mnemonic)
{
if((instr & op->mask) == op->value)
{
// a = shift amount
// s = rs
// t = rt
// d = rd
// i = immediate
// z = immediate, zero-extended
// p = PC + 4 + immediate
// P = ((PC + 4) & 0xF0000000) | (26bitval << 2)
//
// 0 = rd(cop0 registers)
// c = rd(copz data registers)
// C = rd(copz control registers)
// g = rd(GTE data registers)
// G = rd(GTE control registers)
// h = rt(GTE data registers)
char s_a[16];
char s_i[16];
char s_z[16];
char s_p[16];
char s_P[16];
char s_c[16];
char s_C[16];
snprintf(s_a, sizeof(s_a), "%d", shamt);
#if 0
if(immediate < 0)
snprintf(s_i, sizeof(s_i), "%d", immediate);
else
#endif
snprintf(s_i, sizeof(s_i), "0x%04x", (uint32)immediate);
snprintf(s_z, sizeof(s_z), "0x%04x", immediate_ze);
snprintf(s_p, sizeof(s_p), "0x%08x", PC + 4 + (immediate << 2));
snprintf(s_P, sizeof(s_P), "0x%08x", ((PC + 4) & 0xF0000000) | (jt << 2));
snprintf(s_c, sizeof(s_c), "CPR%d", rd);
snprintf(s_C, sizeof(s_C), "CCR%d", rd);
ret = std::string(op->mnemonic);
ret.append(10 - ret.size(), ' ');
for(unsigned int i = 0; i < strlen(op->format); i++)
{
switch(op->format[i])
{
case '#':
// sf mx v cv lm
{
char as[16];
as[0] = 0;
if(!strncmp(&op->format[i], "#sf#", 4))
{
i += 3;
snprintf(as, 16, "sf=%d", (int)(bool)(instr & (1 << 19)));
}
else if(!strncmp(&op->format[i], "#mx#", 4))
{
i += 3;
snprintf(as, 16, "mx=%d", (instr >> 17) & 0x3);
}
else if(!strncmp(&op->format[i], "#v#", 3))
{
i += 2;
snprintf(as, 16, "v=%d", (instr >> 15) & 0x3);
}
else if(!strncmp(&op->format[i], "#cv#", 4))
{
i += 3;
snprintf(as, 16, "cv=%d", (instr >> 13) & 0x3);
}
else if(!strncmp(&op->format[i], "#lm#", 4))
{
i += 3;
snprintf(as, 16, "lm=%d", (int)(bool)(instr & (1 << 10)));
}
ret.append(as);
}
break;
case 'F':
{
char s_F[16];
snprintf(s_F, 16, "0x%07x", instr & 0x1FFFFFF);
ret.append(s_F);
}
break;
case 'h':
ret.append(gte_dr_names[rt]);
break;
case 'g':
ret.append(gte_dr_names[rd]);
break;
case 'G':
ret.append(gte_cr_names[rd]);
break;
case '0':
ret.append(cop0_names[rd]);
break;
case 'c':
ret.append(s_c);
break;
case 'C':
ret.append(s_C);
break;
case 'a':
ret.append(s_a);
break;
case 'i':
ret.append(s_i);
break;
case 'z':
ret.append(s_z);
break;
case 'p':
ret.append(s_p);
break;
case 'P':
ret.append(s_P);
break;
case 's':
ret.append(gpr_names[rs]);
break;
case 't':
ret.append(gpr_names[rt]);
break;
case 'd':
ret.append(gpr_names[rd]);
break;
default:
ret.append(1, op->format[i]);
break;
}
}
break;
}
op++;
}
return(ret);
}
Reference in New Issue View Git Blame Copy Permalink