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PowerPC: properly mirror SO bit from XER into CR0 [R. Belmont]

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This commit is contained in:
R. Belmont 2012-03-04 20:03:37 +00:00
parent 0d744978dc
commit b287db448d
1 changed files with 8 additions and 4 deletions
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12
src/emu/cpu/powerpc/ppcdrc.c
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@ -2270,11 +2270,15 @@ static void generate_compute_flags(powerpc_state *ppc, drcuml_block *block, cons
if (xermask & XER_OV)
{
UML_ROLAND(block, I0, I0, 31, 1); // roland i0,i0,31,0x0001
UML_OR(block, XERSO32, XERSO32, I0); // or [xerso],i0
UML_OR(block, CR32(0), I1, I0); // or [cr0],i1,i0
UML_OR(block, XERSO32, XERSO32, I0); // or [xerso],i0
UML_AND(block, CR32(0), CR32(0), 0xfffffffe); // and [cr0], [cr0], 0xfffffffe (clear SO copy in CR32)
UML_OR(block, CR32(0), I1, XERSO32); // or [cr0],i1,[xerso]
}
else
UML_OR(block, CR32(0), I1, XERSO32); // or [cr0],i1,[xerso]
{
UML_AND(block, CR32(0), CR32(0), 0xfffffffe); // and [cr0], [cr0], 0xfffffffe (clear SO copy in CR32)
UML_OR(block, CR32(0), I1, XERSO32); // or [cr0],i1,[xerso] (OR in new value from XERSO)
}
}
/*-------------------------------------------------
@ -2942,7 +2946,7 @@ static int generate_instruction_1f(powerpc_state *ppc, drcuml_block *block, comp
UML_ADD(block, R32(G_RD(op)), R32(G_RA(op)), R32(G_RB(op))); // add rd,ra,rb
generate_compute_flags(ppc, block, desc, op & M_RC, ((op & M_OE) ? XER_OV : 0), FALSE);
// <update flags>
return TRUE;
return TRUE;
case 0x00a: /* ADDCx */
case 0x20a: /* ADDCOx */