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[N64] Force mtc0 opcodes that initiate to-RSP DMAs to end recompile sequences to force a code check. Fixes certain microcodes from executing garbage code after DMA. [Ryan Holtz]

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This commit is contained in:
Miodrag Milanovic 2012-02-23 14:30:03 +00:00
parent 97c3d0cb39
commit 3915e5c0e2
2 changed files with 10 additions and 2 deletions
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8
src/emu/cpu/rsp/rspdrc.c
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@ -3622,8 +3622,7 @@ static void static_generate_entry_point(rsp_state *rsp)
load_fast_iregs(rsp, block);
/* generate a hash jump via the current mode and PC */
UML_HASHJMP(block, 0, mem(&rsp->pc), *rsp->impstate->nocode);
// hashjmp <mode>,<pc>,nocode
UML_HASHJMP(block, 0, mem(&rsp->pc), *rsp->impstate->nocode); // hashjmp <mode>,<pc>,nocode
block->end();
}
@ -4622,6 +4621,11 @@ static int generate_cop0(rsp_state *rsp, drcuml_block *block, compiler_state *co
UML_MOV(block, mem(&rsp->impstate->arg0), RDREG); // mov [arg0],<rdreg>
UML_MOV(block, mem(&rsp->impstate->arg1), RTREG); // mov [arg1],<rtreg>
UML_CALLC(block, cfunc_get_cop0_reg, rsp); // callc cfunc_get_cop0_reg
if(RDREG == 2)
{
generate_update_cycles(rsp, block, compiler, mem(&rsp->pc), TRUE);
UML_HASHJMP(block, 0, mem(&rsp->pc), *rsp->impstate->nocode);
}
}
return TRUE;

4
src/emu/cpu/rsp/rspfe.c
View File

@ -274,6 +274,10 @@ bool rsp_frontend::describe_cop0(UINT32 op, opcode_desc &desc)
case 0x04: // MTCz
desc.regin[0] |= REGFLAG_R(RTREG);
if(RDREG == 2) // SP_RD_LEN, initiating DMA
{
desc.flags |= OPFLAG_END_SEQUENCE;
}
return true;
}