Is WebAssembly Assembly?

Wasm is like an ISA, but different.

General-purpose CPUs have converged in many areas:

• 8-bit bytes
• Two's complement
• IEEE 754 floating-point

But also:

• Memory is a big virtual address space of bytes
• Calls are just jumps (-and-link) with register and memory conventions
• Syscalls are mode switches and jumps

In WebAssembly, the address space isn't everything.

Calls arguments are part of the call instruction.