BPF Instructions

Created

  • 2024-07-12

Last Updated

  • 2024-11-22

Available Formats

BPF Instruction Conformance Groups

Expert(s)

  • Alexei Starovoitov, David Vernet

Reference

  • RFC 9669: BPF Instruction Set Architecture (ISA)

Available Formats

Range Registration Procedures
Permanent Standards Action or IESG Approval
Provisional Specification Required
Historical Specification Required
Name Description Includes Excludes Status Reference Change Controller
atomic32 32-bit atomic instructions - - Permanent RFC 9669, Section 5.3 (Atomic Operations) IETF
atomic64 64-bit atomic instructions atomic32 - Permanent RFC 9669, Section 5.3 (Atomic Operations) IETF
base32 32-bit base instructions - - Permanent RFC 9669 IETF
base64 64-bit base instructions base32 - Permanent RFC 9669 IETF
divmul32 32-bit division and modulo - - Permanent RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
divmul64 64-bit division and modulo divmul32 - Permanent RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
packet Legacy packet instructions - - Historical RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF

BPF Instruction Set

Expert(s)

  • Alexei Starovoitov, David Vernet

Reference

  • RFC 9669: BPF Instruction Set Architecture (ISA)

Available Formats

Range Registration Procedures
Permanent Standards Action or IESG Approval
Provisional Specification Required
Historical Specification Required
Opcode Src_Reg Offset Imm Description Groups Reference Change Controller
0x00 0x0 0 any (additional immediate value) base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x04 0x0 0 any dst = (u32)((u32)dst + (u32)imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x05 0x0 any 0x00 goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x06 0x0 0 any goto +imm base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x07 0x0 0 any dst += imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x0c any 0 0x00 dst = (u32)((u32)dst + (u32)src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x0f any 0 0x00 dst += src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x14 0x0 0 any dst = (u32)((u32)dst - (u32)imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x15 0x0 any any if dst == imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x16 0x0 any any if (u32)dst == imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x17 0x0 0 any dst -= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x18 0x0 0 any dst = (next_imm << 32) | imm base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x1 0 any dst = map_by_fd(imm) base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x2 0 any dst = map_val(map_by_fd(imm)) + next_imm base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x3 0 any dst = var_addr(imm) base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x4 0 any dst = code_addr(imm) base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x5 0 any dst = map_by_idx(imm) base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x18 0x6 0 any dst = map_val(map_by_idx(imm)) + next_imm base64 RFC 9669, Section 5.4 (64-bit Immediate Instructions) IETF
0x1c any 0 0x00 dst = (u32)((u32)dst - (u32)src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x1d any any 0x00 if dst == src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x1e any any 0x00 if (u32)dst == (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x1f any 0 0x00 dst -= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x20 0x0 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x24 0x0 0 any dst = (u32)(dst * imm) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x25 0x0 any any if dst > imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x26 0x0 any any if (u32)dst > imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x27 0x0 0 any dst *= imm divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x28 0x0 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x2c any 0 0x00 dst = (u32)(dst * src) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x2d any any 0x00 if dst > src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x2e any any 0x00 if (u32)dst > (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x2f any 0 0x00 dst *= src divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x30 0x0 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x34 0x0 0 any dst = (u32)((imm != 0) ? ((u32)dst / (u32)imm) : 0) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x34 0x0 1 any dst = (u32)((imm != 0) ? ((s32)dst s/ imm) : 0) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x35 0x0 any any if dst >= imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x36 0x0 any any if (u32)dst >= imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x37 0x0 0 any dst = (imm != 0) ? (dst / (u32)imm) : 0 divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x37 0x0 1 any dst = (imm != 0) ? (dst s/ imm) : 0 divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x3c any 0 0x00 dst = (u32)((src != 0) ? ((u32)dst / (u32)src) : 0) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x3c any 1 0x00 dst = (u32)((src != 0) ? ((s32)dst s/(s32)src) : 0) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x3d any any 0x00 if dst >= src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x3e any any 0x00 if (u32)dst >= (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x3f any 0 0x00 dst = (src != 0) ? (dst / src) : 0 divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x3f any 1 0x00 dst = (src != 0) ? (dst s/ src) : 0 divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x40 any 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x44 0x0 0 any dst = (u32)(dst | imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x45 0x0 any any if dst & imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x46 0x0 any any if (u32)dst & imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x47 0x0 0 any dst |= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x48 any 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x4c any 0 0x00 dst = (u32)(dst | src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x4d any any 0x00 if dst & src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x4e any any 0x00 if (u32)dst & (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x4f any 0 0x00 dst |= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x50 any 0 any (deprecated, implementation-specific) packet RFC 9669, Section 5.5 (Legacy BPF Packet Access Instructions) IETF
0x54 0x0 0 any dst = (u32)(dst & imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x55 0x0 any any if dst != imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x56 0x0 any any if (u32)dst != imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x57 0x0 0 any dst &= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x5c any 0 0x00 dst = (u32)(dst & src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x5d any any 0x00 if dst != src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x5e any any 0x00 if (u32)dst != (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x5f any 0 0x00 dst &= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x61 any any 0x00 dst = *(u32 *)(src + offset) base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x62 0x0 any any *(u32 *)(dst + offset) = imm base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x63 any any 0x00 *(u32 *)(dst + offset) = src base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x64 0x0 0 any dst = (u32)(dst << imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x65 0x0 any any if dst s> imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x66 0x0 any any if (s32)dst s> (s32)imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x67 0x0 0 any dst <<= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x69 any any 0x00 dst = *(u16 *)(src + offset) base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x6a 0x0 any any *(u16 *)(dst + offset) = imm base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x6b any any 0x00 *(u16 *)(dst + offset) = src base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x6c any 0 0x00 dst = (u32)(dst << src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x6d any any 0x00 if dst s> src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x6e any any 0x00 if (s32)dst s> (s32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x6f any 0 0x00 dst <<= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x71 any any 0x00 dst = *(u8 *)(src + offset) base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x72 0x0 any any *(u8 *)(dst + offset) = imm base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x73 any any 0x00 *(u8 *)(dst + offset) = src base32 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x74 0x0 0 any dst = (u32)(dst >> imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x75 0x0 any any if dst s>= imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x76 0x0 any any if (s32)dst s>= (s32)imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x77 0x0 0 any dst >>= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x79 any any 0x00 dst = *(u64 *)(src + offset) base64 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x7a 0x0 any any *(u64 *)(dst + offset) = imm base64 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x7b any any 0x00 *(u64 *)(dst + offset) = src base64 RFC 9669, Section 5 (Load and Store Instructions) IETF
0x7c any 0 0x00 dst = (u32)(dst >> src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x7d any any 0x00 if dst s>= src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x7e any any 0x00 if (s32)dst s>= (s32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x7f any 0 0x00 dst >>= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x84 0x0 0 0x00 dst = (u32)-dst base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x85 0x0 0 any call helper function by static ID base32 RFC 9669, Section 4.3.1 (Helper Functions) IETF
0x85 0x1 0 any call PC += imm base32 RFC 9669, Section 4.3.2 (Program-local functions) IETF
0x85 0x2 0 any call helper function by BTF ID base32 RFC 9669, Section 4.3.1 (Helper Functions) IETF
0x87 0x0 0 0x00 dst = -dst base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x94 0x0 0 any dst = (u32)((imm != 0)?((u32)dst % (u32)imm) : dst) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x94 0x0 1 any dst = (u32)((imm != 0) ? ((s32)dst s% imm) : dst) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x95 0x0 0 0x00 return base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0x97 0x0 0 any dst = (imm != 0) ? (dst % (u32)imm) : dst divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x97 0x0 1 any dst = (imm != 0) ? (dst s% imm) : dst divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x9c any 0 0x00 dst = (u32)((src != 0)?((u32)dst % (u32)src) : dst) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x9c any 1 0x00 dst = (u32)((src != 0)?((s32)dst s% (s32)src) :dst) divmul32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x9f any 0 0x00 dst = (src != 0) ? (dst % src) : dst divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0x9f any 1 0x00 dst = (src != 0) ? (dst s% src) : dst divmul64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xa4 0x0 0 any dst = (u32)(dst ^ imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xa5 0x0 any any if dst < imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xa6 0x0 any any if (u32)dst < imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xa7 0x0 0 any dst ^= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xac any 0 0x00 dst = (u32)(dst ^ src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xad any any 0x00 if dst < src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xae any any 0x00 if (u32)dst < (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xaf any 0 0x00 dst ^= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xb4 0x0 0 any dst = (u32) imm base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xb5 0x0 any any if dst <= imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xb6 0x0 any any if (u32)dst <= imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xb7 0x0 0 any dst = imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbc any 0 0x00 dst = (u32) src base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbc any 8 0x00 dst = (u32) (s32) (s8) src base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbc any 16 0x00 dst = (u32) (s32) (s16) src base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbd any any 0x00 if dst <= src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xbe any any 0x00 if (u32)dst <= (u32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xbf any 0 0x00 dst = src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbf any 8 0x00 dst = (s64) (s8) src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbf any 16 0x00 dst = (s64) (s16) src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xbf any 32 0x00 dst = (s64) (s32) src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xc3 any any 0x00 lock *(u32 *)(dst + offset) += src atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0x01 src = atomic_fetch_add_32((u32 *)(dst + offset), src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0x40 lock *(u32 *)(dst + offset) |= src atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0x41 src = atomic_fetch_or_32((u32 *)(dst + offset), src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0x50 lock *(u32 *)(dst + offset) &= src atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0x51 src = atomic_fetch_and_32((u32 *)(dst + offset), src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0xa0 lock *(u32 *)(dst + offset) ^= src atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0xa1 src = atomic_fetch_xor_32((u32 *)(dst + offset), src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0xe1 src = xchg_32((u32 *)(dst + offset), src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc3 any any 0xf1 r0 = cmpxchg_32((u32 *)(dst + offset), r0, src) atomic32 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xc4 0x0 0 any dst = (u32)(dst s>> imm) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xc5 0x0 any any if dst s< imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xc6 0x0 any any if (s32)dst s< (s32)imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xc7 0x0 0 any dst s>>= imm base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xcc any 0 0x00 dst = (u32)(dst s>> src) base32 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xcd any any 0x00 if dst s< src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xce any any 0x00 if (s32)dst s< (s32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xcf any 0 0x00 dst s>>= src base64 RFC 9669, Section 4.1 (Arithmetic Instructions) IETF
0xd4 0x0 0 0x10 dst = htole16(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xd4 0x0 0 0x20 dst = htole32(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xd4 0x0 0 0x40 dst = htole64(dst) base64 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xd5 0x0 any any if dst s<= imm goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xd6 0x0 any any if (s32)dst s<= (s32)imm goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xd7 0x0 0 0x10 dst = bswap16(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xd7 0x0 0 0x20 dst = bswap32(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xd7 0x0 0 0x40 dst = bswap64(dst) base64 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xdb any any 0x00 lock *(u64 *)(dst + offset) += src atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0x01 src = atomic_fetch_add_64((u64 *)(dst + offset), src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0x40 lock *(u64 *)(dst + offset) |= src atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0x41 src = atomic_fetch_or_64((u64 *)(dst + offset), src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0x50 lock *(u64 *)(dst + offset) &= src atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0x51 src = atomic_fetch_and_64((u64 *)(dst + offset), src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0xa0 lock *(u64 *)(dst + offset) ^= src atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0xa1 src = atomic_fetch_xor_64((u64 *)(dst + offset), src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0xe1 src = xchg_64((u64 *)(dst + offset), src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdb any any 0xf1 r0 = cmpxchg_64((u64 *)(dst + offset), r0, src) atomic64 RFC 9669, Section 5.3 (Atomic Operations) IETF
0xdc 0x0 0 0x10 dst = htobe16(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xdc 0x0 0 0x20 dst = htobe32(dst) base32 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xdc 0x0 0 0x40 dst = htobe64(dst) base64 RFC 9669, Section 4.2 (Byte Swap Instructions) IETF
0xdd any any 0x00 if dst s<= src goto +offset base64 RFC 9669, Section 4.3 (Jump Instructions) IETF
0xde any any 0x00 if (s32)dst s<= (s32)src goto +offset base32 RFC 9669, Section 4.3 (Jump Instructions) IETF