Here's a fancy trick from LLVM source: https://github.com/llvm/llvm-project/blob/main/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp#L4397-L4401 https://github.com/llv

Here's a fancy trick from LLVM source: https://github.com/llvm/llvm-project/blob/main/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp#L4397-L4401 https://github.com/llvm/llvm-project/blob/main/llvm/lib/Targ... #define A 0xf0 #define B 0xcc #define C 0xaa And then you can build immediate for VPTERNLOG operation by writing bitwise expression with A/B/C values in source code. For example, A^B^C=150. A^(~B&C)=210. And so on... Also mentioned by Fabian here: https://twitter.com/rygorous/status/1187032693944410114 https://twitter.com/rygorous/status/1187032693944410114