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tms32051: fix accumulator conditions (nw)

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This commit is contained in:
Ville Linde 2016-01-02 17:01:06 +02:00
parent d74d1febc4
commit 00f0c6d0d4
1 changed files with 19 additions and 14 deletions
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33
src/devices/cpu/tms32051/32051ops.inc
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@ -212,21 +212,26 @@ bool tms32051_device::GET_ZLVC_CONDITION(int zlvc, int zlvc_mask)
if (((zlvc & 0x1) == 0) && m_st1.c != 0) // NC
return false;
}
if (zlvc_mask & 0x8) // Z-bit
{
if ((zlvc & 0x8) && (INT32)(m_acc) != 0) // EQ
return false;
if (((zlvc & 0x8) == 0) && (INT32)(m_acc) == 0) // NEQ
return false;
}
if (zlvc_mask & 0x4) // L-bit
{
if ((zlvc & 0x4) && (INT32)(m_acc) >= 0) // LT
return false;
if (((zlvc & 0x4) == 0) && (INT32)(m_acc) <= 0) // GT
return false;
}
switch ((zlvc_mask & 0xc) | ((zlvc >> 2) & 0x3))
{
case 0x00: break; // MZ=0, ML=0, Z=0, L=0
case 0x01: break; // MZ=0, ML=0, Z=0, L=1
case 0x02: break; // MZ=0, ML=0, Z=1, L=0
case 0x03: break; // MZ=0, ML=0, Z=1, L=1
case 0x04: if ((INT32)(m_acc) <= 0) return false; break; // MZ=0, ML=1, Z=0, L=0 (GT)
case 0x05: if ((INT32)(m_acc) >= 0) return false; break; // MZ=0, ML=1, Z=0, L=1 (LT)
case 0x06: if ((INT32)(m_acc) <= 0) return false; break; // MZ=0, ML=1, Z=1, L=0 (GT)
case 0x07: if ((INT32)(m_acc) >= 0) return false; break; // MZ=0, ML=1, Z=1, L=1 (LT)
case 0x08: if ((INT32)(m_acc) == 0) return false; break; // MZ=1, ML=0, Z=0, L=0 (NEQ)
case 0x09: if ((INT32)(m_acc) == 0) return false; break; // MZ=1, ML=0, Z=0, L=1 (NEQ)
case 0x0a: if ((INT32)(m_acc) != 0) return false; break; // MZ=1, ML=0, Z=1, L=0 (EQ)
case 0x0b: if ((INT32)(m_acc) != 0) return false; break; // MZ=1, ML=0, Z=1, L=1 (EQ)
case 0x0c: if ((INT32)(m_acc) <= 0) return false; break; // MZ=1, ML=1, Z=0, L=0 (GT)
case 0x0d: if ((INT32)(m_acc) >= 0) return false; break; // MZ=1, ML=1, Z=0, L=1 (LT)
case 0x0e: if ((INT32)(m_acc) < 0) return false; break; // MZ=1, ML=1, Z=1, L=0 (GEQ)
case 0x0f: if ((INT32)(m_acc) > 0) return false; break; // MZ=1, ML=1, Z=1, L=1 (LEQ)
}
return true;
}