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nfp: bpf: add helper for emitting nops
The need to emitting a few nops will become more common soon as we add stack and map support. Add a helper. This allows for code to be shorter but also may be handy for marking the nops with a "reason" to ease applying optimizations. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 8 additions and 3 deletions
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@ -494,6 +494,12 @@ static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg)
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return tmp_reg;
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return tmp_reg;
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}
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}
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static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count)
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{
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while (count--)
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emit_nop(nfp_prog);
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}
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static void
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static void
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wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask,
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wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask,
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enum br_special special)
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enum br_special special)
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@ -1799,7 +1805,7 @@ static void nfp_outro(struct nfp_prog *nfp_prog)
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static int nfp_translate(struct nfp_prog *nfp_prog)
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static int nfp_translate(struct nfp_prog *nfp_prog)
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{
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{
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struct nfp_insn_meta *meta;
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struct nfp_insn_meta *meta;
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int i, err;
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int err;
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nfp_intro(nfp_prog);
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nfp_intro(nfp_prog);
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if (nfp_prog->error)
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if (nfp_prog->error)
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@ -1831,8 +1837,7 @@ static int nfp_translate(struct nfp_prog *nfp_prog)
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if (nfp_prog->error)
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if (nfp_prog->error)
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return nfp_prog->error;
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return nfp_prog->error;
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for (i = 0; i < NFP_USTORE_PREFETCH_WINDOW; i++)
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wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW);
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emit_nop(nfp_prog);
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if (nfp_prog->error)
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if (nfp_prog->error)
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return nfp_prog->error;
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return nfp_prog->error;
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