JS : Jump (to destination register) if source register's Sign bit is set

If the source register's MSB (in SRC1) is set (the 2s-complement integer value is negative), the location where the core will execute the next instruction is pointed to by the destination register (in SRC2). Prepare it in advance !

The Imm16 field is ignored because the negation field already provides with a XOR.

See also the other instructions of the JMP group : JMP, JZ/JNZ, JO/JNE/JNO/JE, JNS