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Fix the AC flag on 8-bit and 16-bit ADC and SBB instructions.

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This commit is contained in:
OBattler
2025-02-08 16:10:26 +01:00
parent 0ccd937d9b
commit 03c74f8bb6
1 changed files with 4 additions and 4 deletions
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8
src/cpu/x86_flags.h
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@@ -741,7 +741,7 @@ setadc8(uint8_t a, uint8_t b)
cpu_state.flags |= C_FLAG;
if (!((a ^ b) & 0x80) && ((a ^ c) & 0x80))
cpu_state.flags |= V_FLAG;
if (((a & 0xF) + (b & 0xF)) & 0x10)
if (((a & 0xF) + (b & 0xF) + tempc) & 0x10)
cpu_state.flags |= A_FLAG;
}
static __inline void
@@ -755,7 +755,7 @@ setadc16(uint16_t a, uint16_t b)
cpu_state.flags |= C_FLAG;
if (!((a ^ b) & 0x8000) && ((a ^ c) & 0x8000))
cpu_state.flags |= V_FLAG;
if (((a & 0xF) + (b & 0xF)) & 0x10)
if (((a & 0xF) + (b & 0xF) + tempc) & 0x10)
cpu_state.flags |= A_FLAG;
}
static __inline void
@@ -785,7 +785,7 @@ setsbc8(uint8_t a, uint8_t b)
cpu_state.flags |= C_FLAG;
if ((a ^ b) & (a ^ c) & 0x80)
cpu_state.flags |= V_FLAG;
if (((a & 0xF) - (b & 0xF)) & 0x10)
if (((a & 0xF) - ((b & 0xF) + tempc)) & 0x10)
cpu_state.flags |= A_FLAG;
}
static __inline void
@@ -800,7 +800,7 @@ setsbc16(uint16_t a, uint16_t b)
cpu_state.flags |= C_FLAG;
if ((a ^ b) & (a ^ c) & 0x8000)
cpu_state.flags |= V_FLAG;
if (((a & 0xF) - (b & 0xF)) & 0x10)
if (((a & 0xF) - ((b & 0xF) + tempc)) & 0x10)
cpu_state.flags |= A_FLAG;
}