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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-10-23 11:58:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-24 17:38:37 +0900 |
| commit | ff42bb9fe3091d996c763848afa3e57c2a780217 (patch) | |
| tree | 670bbb14097744ae5d4e0506073bd83c063e7ef0 | |
| parent | a5dd4982879b29c7cb8fa1ba2bca9e1eb8c14dc2 (diff) | |
| download | linux-ff42bb9fe3091d996c763848afa3e57c2a780217.tar.gz linux-ff42bb9fe3091d996c763848afa3e57c2a780217.tar.bz2 linux-ff42bb9fe3091d996c763848afa3e57c2a780217.zip | |
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>
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/jit.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 23fb11a41cc4..eb8c905936ac 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -494,6 +494,12 @@ static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) return tmp_reg; } +static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) +{ + while (count--) + emit_nop(nfp_prog); +} + static void wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_special special) @@ -1799,7 +1805,7 @@ static void nfp_outro(struct nfp_prog *nfp_prog) static int nfp_translate(struct nfp_prog *nfp_prog) { struct nfp_insn_meta *meta; - int i, err; + int err; nfp_intro(nfp_prog); if (nfp_prog->error) @@ -1831,8 +1837,7 @@ static int nfp_translate(struct nfp_prog *nfp_prog) if (nfp_prog->error) return nfp_prog->error; - for (i = 0; i < NFP_USTORE_PREFETCH_WINDOW; i++) - emit_nop(nfp_prog); + wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); if (nfp_prog->error) return nfp_prog->error; |