RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

32x: drc: emulate illegal insn

Browse source 
The X-Men proto debugger makes it worth it
This commit is contained in:
notaz 2013-08-12 00:47:25 +03:00
parent f8675e282e
commit 001f73a0d6
1 changed files with 33 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

47
cpu/sh2/compiler.c
View file

@ -1228,7 +1228,7 @@ static int emit_memhandler_read_rr(sh2_reg_e rd, sh2_reg_e rs, u32 offs, int siz
return hr2;
}
static void emit_memhandler_write(int size, u32 pc)
static void emit_memhandler_write(int size)
{
int ctxr;
host_arg2reg(ctxr, 2);
@ -1718,7 +1718,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp2 = rcache_get_reg_arg(0, SHR_R0);
tmp3 = rcache_get_reg(GET_Rn(), RC_GR_READ);
emith_add_r_r(tmp2, tmp3);
emit_memhandler_write(op & 3, pc);
emit_memhandler_write(op & 3);
goto end_op;
case 0x07:
// MUL.L Rm,Rn 0000nnnnmmmm0111
@ -1837,7 +1837,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp2 = rcache_get_reg_arg(1, GET_Rm());
if (op & 0x0f)
emith_add_r_imm(tmp, (op & 0x0f) * 4);
emit_memhandler_write(2, pc);
emit_memhandler_write(2);
goto end_op;
case 0x02:
@ -1849,7 +1849,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
rcache_clean();
rcache_get_reg_arg(0, GET_Rn());
rcache_get_reg_arg(1, GET_Rm());
emit_memhandler_write(op & 3, pc);
emit_memhandler_write(op & 3);
goto end_op;
case 0x04: // MOV.B Rm,@-Rn 0010nnnnmmmm0100
case 0x05: // MOV.W Rm,@-Rn 0010nnnnmmmm0101
@ -1859,7 +1859,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
emith_sub_r_imm(tmp, (1 << (op & 3)));
rcache_clean();
rcache_get_reg_arg(0, GET_Rn());
emit_memhandler_write(op & 3, pc);
emit_memhandler_write(op & 3);
goto end_op;
case 0x07: // DIV0S Rm,Rn 0010nnnnmmmm0111
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
@ -2168,7 +2168,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp3 = rcache_get_reg_arg(1, tmp);
if (tmp == SHR_SR)
emith_clear_msb(tmp3, tmp3, 22); // reserved bits defined by ISA as 0
emit_memhandler_write(2, pc);
emit_memhandler_write(2);
goto end_op;
case 0x04:
case 0x05:
@ -2308,7 +2308,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
emith_move_r_r(tmp2, tmp);
rcache_free_tmp(tmp);
rcache_get_reg_arg(0, GET_Rn());
emit_memhandler_write(0, pc);
emit_memhandler_write(0);
break;
default:
goto default_;
@ -2468,7 +2468,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp3 = (op & 0x100) >> 8;
if (op & 0x0f)
emith_add_r_imm(tmp, (op & 0x0f) << tmp3);
emit_memhandler_write(tmp3, pc);
emit_memhandler_write(tmp3);
goto end_op;
case 0x0400: // MOV.B @(disp,Rm),R0 10000100mmmmdddd
case 0x0500: // MOV.W @(disp,Rm),R0 10000101mmmmdddd
@ -2501,7 +2501,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp2 = rcache_get_reg_arg(1, SHR_R0);
tmp3 = (op & 0x300) >> 8;
emith_add_r_imm(tmp, (op & 0xff) << tmp3);
emit_memhandler_write(tmp3, pc);
emit_memhandler_write(tmp3);
goto end_op;
case 0x0400: // MOV.B @(disp,GBR),R0 11000100dddddddd
case 0x0500: // MOV.W @(disp,GBR),R0 11000101dddddddd
@ -2517,12 +2517,12 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
emith_add_r_imm(tmp, 4);
tmp = rcache_get_reg_arg(1, SHR_SR);
emith_clear_msb(tmp, tmp, 22);
emit_memhandler_write(2, pc);
emit_memhandler_write(2);
// push PC
rcache_get_reg_arg(0, SHR_SP);
tmp = rcache_get_tmp_arg(1);
emith_move_r_imm(tmp, pc);
emit_memhandler_write(2, pc);
emit_memhandler_write(2);
// obtain new PC
emit_memhandler_read_rr(SHR_PC, SHR_VBR, (op & 0xff) * 4, 2);
// indirect jump -> back to dispatcher
@ -2574,7 +2574,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp3 = rcache_get_reg_arg(0, SHR_GBR);
tmp4 = rcache_get_reg(SHR_R0, RC_GR_READ);
emith_add_r_r(tmp3, tmp4);
emit_memhandler_write(0, pc);
emit_memhandler_write(0);
goto end_op;
}
goto default_;
@ -2587,8 +2587,27 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
default:
default_:
elprintf(EL_ANOMALY, "%csh2 drc: unhandled op %04x @ %08x",
sh2->is_slave ? 's' : 'm', op, pc - 2);
elprintf_sh2(sh2, EL_ANOMALY,
"drc: illegal op %04x @ %08x", op, pc - 2);
tmp = rcache_get_reg(SHR_SP, RC_GR_RMW);
emith_sub_r_imm(tmp, 4*2);
// push SR
tmp = rcache_get_reg_arg(0, SHR_SP);
emith_add_r_imm(tmp, 4);
tmp = rcache_get_reg_arg(1, SHR_SR);
emith_clear_msb(tmp, tmp, 22);
emit_memhandler_write(2);
// push PC
rcache_get_reg_arg(0, SHR_SP);
tmp = rcache_get_tmp_arg(1);
emith_move_r_imm(tmp, pc - 2);
emit_memhandler_write(2);
// obtain new PC
emit_memhandler_read_rr(SHR_PC, SHR_VBR, 4 * 4, 2);
// indirect jump -> back to dispatcher
rcache_flush();
emith_jump(sh2_drc_dispatcher);
break;
}