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fix #672

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This commit is contained in:
RSDuck
2020-07-25 21:16:23 +02:00
parent 8a96dfce18
commit af31d25086
1 changed files with 2 additions and 2 deletions
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4
src/ARMInterpreter_ALU.cpp
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@ -1078,7 +1078,7 @@ void A_QDADD(ARM* cpu)
u32 rm = cpu->R[cpu->CurInstr & 0xF];
u32 rn = cpu->R[(cpu->CurInstr >> 16) & 0xF];
if (rn & 0x40000000)
if (OVERFLOW_ADD(rn, rn, rn<<1))
{
rn = (rn & 0x80000000) ? 0x80000000 : 0x7FFFFFFF;
cpu->CPSR |= 0x08000000; // CHECKME
@ -1104,7 +1104,7 @@ void A_QDSUB(ARM* cpu)
u32 rm = cpu->R[cpu->CurInstr & 0xF];
u32 rn = cpu->R[(cpu->CurInstr >> 16) & 0xF];
if (rn & 0x40000000)
if (OVERFLOW_ADD(rn, rn, rn<<1))
{
rn = (rn & 0x80000000) ? 0x80000000 : 0x7FFFFFFF;
cpu->CPSR |= 0x08000000; // CHECKME