ref: c02ebef74e491de7e34a681d23bbcde1ee08f5b5 dir: /as/target/x86/rules.dat/
^imm8 AIMM8 ^imm16 AIMM16 ^imm32 AIMM32 ^imm64 AIMM64 ^\(n\) ADIRECT ^sym ASYM ^string ASTR