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Diffstat (limited to 'src/core/arm/interpreter/armsupp.cpp')
| -rw-r--r-- | src/core/arm/interpreter/armsupp.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/core/arm/interpreter/armsupp.cpp b/src/core/arm/interpreter/armsupp.cpp index b31c0ea2..6774f8a7 100644 --- a/src/core/arm/interpreter/armsupp.cpp +++ b/src/core/arm/interpreter/armsupp.cpp @@ -444,6 +444,14 @@ ARMul_AddOverflow (ARMul_State * state, ARMword a, ARMword b, ARMword result) ASSIGNV (AddOverflow (a, b, result)); } +/* Assigns the Q flag if the given result is considered an overflow from the addition of a and b */ +void ARMul_AddOverflowQ(ARMul_State* state, ARMword a, ARMword b) +{ + u32 result = a + b; + if (((result ^ a) & (u32)0x80000000) && ((a ^ b) & (u32)0x80000000) == 0) + SETQ; +} + /* Assigns the C flag after an subtraction of a and b to give result. */ void |