Commit 694896ad authored by Pu Lehui's avatar Pu Lehui Committed by Alexei Starovoitov

riscv, bpf: Support sign-extension mov insns

Add support sign-extension mov instructions for RV64.
Signed-off-by: default avatarPu Lehui <pulehui@huawei.com>
Acked-by: default avatarBjörn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20230824095001.3408573-4-pulehui@huaweicloud.comSigned-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 3d06d816
...@@ -1047,7 +1047,19 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx, ...@@ -1047,7 +1047,19 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_zext_32(rd, ctx); emit_zext_32(rd, ctx);
break; break;
} }
emit_mv(rd, rs, ctx); switch (insn->off) {
case 0:
emit_mv(rd, rs, ctx);
break;
case 8:
case 16:
emit_slli(RV_REG_T1, rs, 64 - insn->off, ctx);
emit_srai(rd, RV_REG_T1, 64 - insn->off, ctx);
break;
case 32:
emit_addiw(rd, rs, 0, ctx);
break;
}
if (!is64 && !aux->verifier_zext) if (!is64 && !aux->verifier_zext)
emit_zext_32(rd, ctx); emit_zext_32(rd, ctx);
break; break;
......
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