diff options
Diffstat (limited to 'src/arch/arm/insts')
| -rw-r--r-- | src/arch/arm/insts/static_inst.hh | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/arch/arm/insts/static_inst.hh b/src/arch/arm/insts/static_inst.hh index 485d6997e..634cf0812 100644 --- a/src/arch/arm/insts/static_inst.hh +++ b/src/arch/arm/insts/static_inst.hh @@ -60,6 +60,23 @@ class ArmStaticInst : public StaticInst bool shift_carry_rs(uint32_t base, uint32_t shamt, uint32_t type, uint32_t cfval) const; + template<int width> + static bool + saturateOp(int32_t &res, int64_t op1, int64_t op2, bool sub=false) + { + int64_t midRes = sub ? (op1 - op2) : (op1 + op2); + if (bits(midRes, width) != bits(midRes, width - 1)) { + if (midRes > 0) + res = (1LL << (width - 1)) - 1; + else + res = -(1LL << (width - 1)); + return true; + } else { + res = midRes; + return false; + } + } + // Constructor ArmStaticInst(const char *mnem, ExtMachInst _machInst, OpClass __opClass) |