Loongson contains several hundred "x86 compatibility" instructions to do things like calculate status codes as x86 does or implement x87 80-bit floating point operations.
This means a dynamically recompiling emulator like Qemu can emit short instruction sequences for blocks of x86 instruction, instead of long workarounds to emulate its oddities.
This means a dynamically recompiling emulator like Qemu can emit short instruction sequences for blocks of x86 instruction, instead of long workarounds to emulate its oddities.