diff options
| author |  Lioncash <mathew1800@gmail.com> | 2014-12-28 06:07:24 -0500 |
|---|---|---|
| committer | Lioncash <mathew1800@gmail.com> | 2014-12-28 06:09:43 -0500 |
| commit | 059c65a27af538cba40aa43d2eeb3a544661a9b8 (patch) | |
| tree | 250facd7671854ca8818c7900515813a3b7d94de /src/core/arm/interpreter/armsupp.cpp | |
| parent | 28e64806cd276b3b763e57a5dc026ba153689c88 (diff) | |
armemu: Fix underflows in USAD8/USADA8
Initially reported by xdec.
Diffstat (limited to 'src/core/arm/interpreter/armsupp.cpp')
| -rw-r--r-- | src/core/arm/interpreter/armsupp.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/core/arm/interpreter/armsupp.cpp b/src/core/arm/interpreter/armsupp.cpp index 6774f8a7..61639d15 100644 --- a/src/core/arm/interpreter/armsupp.cpp +++ b/src/core/arm/interpreter/armsupp.cpp @@ -392,6 +392,15 @@ ARMul_NthReg (ARMword instr, unsigned number) return (bit - 1); } +/* Unsigned sum of absolute difference */ +u8 ARMul_UnsignedAbsoluteDifference(u8 left, u8 right) +{ + if (left > right) + return left - right; + + return right - left; +} + /* Assigns the N and Z flags depending on the value of result. */ void |