This is a meta-bug to track the addition of all the AST operators defined in: https://github.com/WebAssembly/design/blob/master/AstSemantics.md to the text format (WasmText.cpp) and wasm validator (Wasm.cpp). In many cases, the opcodes are already present in the binary format (WasmBinary.h) and generated by AsmJS.cpp, but require some tweaks to match the wasm binary format.
As of bug 1287967 which implemented grow_memory, all the basic operators have been implemented. Updates to the binary format will probably provide new ones, but the initial, big set is done now. Closing.