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| -rw-r--r-- | Documentation/bpf/standardization/instruction-set.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/bpf/standardization/instruction-set.rst b/Documentation/bpf/standardization/instruction-set.rst index 02e2490433c6..6b11d1109f12 100644 --- a/Documentation/bpf/standardization/instruction-set.rst +++ b/Documentation/bpf/standardization/instruction-set.rst @@ -393,6 +393,19 @@ The ``MOVSX`` instruction does a move operation with sign extension. operands into 64-bit operands. Unlike other arithmetic instructions, ``MOVSX`` is only defined for register source operands (``X``). +``{MOV, K, ALU64}`` means:: + + dst = (s64)imm + +``{MOV, X, ALU}`` means:: + + dst = (u32)src + +``{MOVSX, X, ALU}`` with 'offset' 8 means:: + + dst = (u32)(s32)(s8)src + + The ``NEG`` instruction is only defined when the source bit is clear (``K``). @@ -491,6 +504,10 @@ Example: where 's>=' indicates a signed '>=' comparison. +``{JLE, K, JMP}`` means:: + + if dst <= (u64)(s64)imm goto +offset + ``{JA, K, JMP32}`` means:: gotol +imm |