BTC

REG0=GPRv_B():rw REG1=GPRv_R():r

x86_64 X86_LEGACY BITBYTE I386 source: xed

XED_BTC_X86_LEGACY_0F_BB_846070

Encoding

encoding_kindX86_LEGACY
opcode_bytesBB
opcode_map0F
mandatory_prefix-
has_modrmTrue
cpl3
raw_encoding0x0F 0xBB MOD[0b11] MOD=3 REG[rrr] RM[nnn]

Operands (2)

# Role Kind Class / Reg Width Access Visibility Encoded in
0 REG0 REG RW EXPLICIT MODRM_REG
1 REG1 REG R EXPLICIT MODRM_REG

Flag effects (5)

CF = WRITE PF = UNDEFINED AF = UNDEFINED SF = UNDEFINED OF = UNDEFINED

Micro-ops sequence (0)

No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.