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avr8: fix SBIW V flag once more

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(cherry picked from commit 6517b66f3e)
This commit is contained in:
hap 2024-03-24 22:46:26 +01:00
parent d790d8e0a9
commit 5abb7f4df2
1 changed files with 12 additions and 9 deletions
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21
src/devices/cpu/avr8/avr8ops.hxx
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@ -1234,10 +1234,10 @@ void avr8_base_device::op_adiw(uint16_t op)
if (BIT(pd, 15))
{
m_r[SREG] |= SREG_MASK_N;
if (!BIT(rr, 7))
m_r[SREG] |= SREG_MASK_V;
else
if (BIT(rr, 7))
m_r[SREG] |= SREG_MASK_S;
else
m_r[SREG] |= SREG_MASK_V;
}
else
{
@ -1258,14 +1258,17 @@ void avr8_base_device::op_sbiw(uint16_t op)
m_r[SREG] &= ~(SREG_MASK_V | SREG_MASK_N | SREG_MASK_S | SREG_MASK_Z | SREG_MASK_C);
if (BIT(pd, 15))
{
m_r[SREG] |= SREG_MASK_N;
m_r[SREG] |= SREG_MASK_N | SREG_MASK_S;
if (!BIT(rr, 7))
m_r[SREG] |= SREG_MASK_V | SREG_MASK_C;
else
m_r[SREG] |= SREG_MASK_S;
m_r[SREG] |= SREG_MASK_C;
}
else
{
if (pd == 0)
m_r[SREG] |= SREG_MASK_Z;
if (BIT(rr, 7))
m_r[SREG] |= SREG_MASK_V | SREG_MASK_S;
}
else if (pd == 0)
m_r[SREG] |= SREG_MASK_Z;
m_r[24 + (DCONST(op) << 1)] = pd & 0x00ff;
m_r[25 + (DCONST(op) << 1)] = (pd >> 8) & 0x00ff;
}