From: Vladimir Murzin <murzin.v@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: dborkman@redhat.com, paulus@samba.org, davem@davemloft.net,
Vladimir Murzin <murzin.v@gmail.com>
Subject: [PATCH] ppc: bpf_jit: support MOD operation
Date: Wed, 28 Aug 2013 02:49:52 +0400 [thread overview]
Message-ID: <1377643792-10327-1-git-send-email-murzin.v@gmail.com> (raw)
commit b6069a9570 (filter: add MOD operation) added generic
support for modulus operation in BPF.
This patch brings JIT support for PPC64
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
---
arch/powerpc/net/bpf_jit_comp.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index bf56e33..96f24dc 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -193,6 +193,28 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image,
PPC_MUL(r_A, r_A, r_scratch1);
}
break;
+ case BPF_S_ALU_MOD_X: /* A %= X; */
+ ctx->seen |= SEEN_XREG;
+ PPC_CMPWI(r_X, 0);
+ if (ctx->pc_ret0 != -1) {
+ PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]);
+ } else {
+ PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12);
+ PPC_LI(r_ret, 0);
+ PPC_JMP(exit_addr);
+ }
+ PPC_DIVWU(r_scratch1, r_A, r_X);
+ PPC_MUL(r_scratch1, r_X, r_scratch1);
+ PPC_SUB(r_A, r_A, r_scratch1);
+ break;
+ case BPF_S_ALU_MOD_K: /* A %= K; */
+#define r_scratch2 (r_scratch1 + 1)
+ PPC_LI32(r_scratch2, K);
+ PPC_DIVWU(r_scratch1, r_A, r_scratch2);
+ PPC_MUL(r_scratch1, r_scratch2, r_scratch1);
+ PPC_SUB(r_A, r_A, r_scratch1);
+#undef r_scratch2
+ break;
case BPF_S_ALU_DIV_X: /* A /= X; */
ctx->seen |= SEEN_XREG;
PPC_CMPWI(r_X, 0);
--
1.8.1.5
next reply other threads:[~2013-08-27 18:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-27 22:49 Vladimir Murzin [this message]
2013-09-02 17:48 ` [PATCH] ppc: bpf_jit: support MOD operation Vladimir Murzin
2013-09-02 20:45 ` Benjamin Herrenschmidt
2013-09-03 19:58 ` Vladimir Murzin
2013-09-03 20:52 ` Daniel Borkmann
2013-09-04 7:04 ` Daniel Borkmann
2013-09-11 16:15 ` Vladimir Murzin
2013-09-12 1:18 ` Matt Evans
2013-09-12 2:56 ` Vladimir Murzin
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