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bpf_rss
2020 May 12
2
BPF tablegen+codegen question
In BPF, an ADD instruction is defined as a 2 register instruction:
0x0f. add dst, src. dst += src
In BPFInstrInfo.td this kind of ALU instruction is defined with:
def _rr : ALU_RR<BPF_ALU64, Opc,
(outs GPR:$dst),
(ins GPR:$src2, GPR:$src),
"$dst "#OpcodeStr#" $src",
[(set