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Diffstat (limited to 'Documentation/bpf/clang-notes.rst')
| -rw-r--r-- | Documentation/bpf/clang-notes.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/bpf/clang-notes.rst b/Documentation/bpf/clang-notes.rst index b15179cb5117..528feddf2db9 100644 --- a/Documentation/bpf/clang-notes.rst +++ b/Documentation/bpf/clang-notes.rst @@ -14,6 +14,12 @@ Clang defined "CPU" versions, where a CPU version of 3 corresponds to the curren Clang can select the eBPF ISA version using ``-mcpu=v3`` for example to select version 3. +Arithmetic instructions +======================= + +For CPU versions prior to 3, Clang v7.0 and later can enable ``BPF_ALU`` support with +``-Xclang -target-feature -Xclang +alu32``. In CPU version 3, support is automatically included. + Atomic operations ================= |