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Hello，everyone. I am very embarrassed to ask such a simple question. I want to add an intrinsics(named max_qb) in x86 backend. In include/llvm/IR/IntrinsicsX86.td, I add a intrinsics (GCCBuiltin). In clang( BuiltinsX86.def ), I add a BUILTIN. And in x86 backend , I change : the X86InstrInfo.td to add def X86max_qb_flag , X86InstrArithmetic.td to add define of instruction , X86ISelLowering.cpp to

hi .. I have an asterisk system with three TDM100P (single port FXO) cards and 10 Grandstream 100 phones connected to it .. 1st question: when i phone out or receive a call from one of the SIP phones onto the PSTN, there is a LOT of local echo in the handset .. the PSTN end of the call does not here this echo, but it's VERY annoying on the SIP end of things .. the echo seems to be about 0.3