mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
powerpc/bpf: Support MOD operation
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>
Acked-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
a40a2b6707
commit
b0c06d3335
2 changed files with 21 additions and 0 deletions
|
@ -39,6 +39,7 @@
|
|||
#define r_X 5
|
||||
#define r_addr 6
|
||||
#define r_scratch1 7
|
||||
#define r_scratch2 8
|
||||
#define r_D 14
|
||||
#define r_HL 15
|
||||
#define r_M 16
|
||||
|
|
|
@ -187,6 +187,26 @@ 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; */
|
||||
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);
|
||||
break;
|
||||
case BPF_S_ALU_DIV_X: /* A /= X; */
|
||||
ctx->seen |= SEEN_XREG;
|
||||
PPC_CMPWI(r_X, 0);
|
||||
|
|
Loading…
Reference in a new issue