[Here](https://github.com/rust-lang/rustc_codegen_gcc/blob/3187d32079b817522cc17413ec9185b130daf693/src/intrinsic/llvm.rs#L1329-L1344) There doesn't seem to have GCC intrinsics for those: rather, they are implemented as inline assembly.
Here
There doesn't seem to have GCC intrinsics for those: rather, they are implemented as inline assembly.