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Fixed an ARM CPU core bug with pre-indexed addressing opcodes, that was preventing Poizone to boot [Tim Schuerewegen]

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new working game
----------------------
Poizone [Tim Schuerewegen]
This commit is contained in:
Angelo Salese 2010-12-28 23:24:53 +00:00
parent 96ce772581
commit 7ae0a6898e
1 changed files with 9 additions and 3 deletions
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8
src/emu/cpu/arm/arm.c
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@ -604,11 +604,17 @@ static void HandleMemSingle( ARM_REGS* cpustate, UINT32 insn )
/* Pre-indexed addressing */ /* Pre-indexed addressing */
if (insn & INSN_SDT_U) if (insn & INSN_SDT_U)
{ {
if (rn != eR15)
rnv = (GetRegister(cpustate, rn) + off); rnv = (GetRegister(cpustate, rn) + off);
else
rnv = (R15 & ADDRESS_MASK) + off;
} }
else else
{ {
if (rn != eR15)
rnv = (GetRegister(cpustate, rn) - off); rnv = (GetRegister(cpustate, rn) - off);
else
rnv = (R15 & ADDRESS_MASK) - off;
} }
if (insn & INSN_SDT_W) if (insn & INSN_SDT_W)
@ -619,7 +625,7 @@ static void HandleMemSingle( ARM_REGS* cpustate, UINT32 insn )
} }
else if (rn == eR15) else if (rn == eR15)
{ {
rnv = (rnv & ADDRESS_MASK) + 8; rnv = rnv + 8;
} }
} }
else else