Similar to the LI32() optimization, if the value can be represented
in 32-bits, use LI32(). Also handle loading a few specific forms of
immediate values in an optimum manner.
Cc: Matt Evans <m...@ozlabs.org>
Cc: Denis Kirjanov <k...@linux-powerpc.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Alexei Starovoitov <a...@fb.com>
Cc: Daniel Borkmann <dan...@iogearbox.net>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Ananth N Mavinakayanahalli <ana...@in.ibm.com>
Signed-off-by: Naveen N. Rao <naveen.n....@linux.vnet.ibm.com>
---
arch/powerpc/net/bpf_jit.h | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
index a9882db..4c1e055 100644
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -244,20 +244,25 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh);
} } while(0)
#define PPC_LI64(d, i) do { \
- if (!((uintptr_t)(i) & 0xffffffff00000000ULL)) \
+ if ((long)(i) >= -2147483648 && \
+ (long)(i) < 2147483648) \
PPC_LI32(d, i); \
else { \
- PPC_LIS(d, ((uintptr_t)(i) >> 48)); \
- if ((uintptr_t)(i) & 0x0000ffff00000000ULL) \
- PPC_ORI(d, d, \
- ((uintptr_t)(i) >> 32) & 0xffff); \
+ if (!((uintptr_t)(i) & 0xffff800000000000ULL)) \
+ PPC_LI(d, ((uintptr_t)(i) >> 32) & 0xffff); \
+ else { \
+ PPC_LIS(d, ((uintptr_t)(i) >> 48)); \
+ if ((uintptr_t)(i) & 0x0000ffff00000000ULL) \
+ PPC_ORI(d, d, \
+ ((uintptr_t)(i) >> 32) & 0xffff); \
+ } \
PPC_SLDI(d, d, 32); \
if ((uintptr_t)(i) & 0x00000000ffff0000ULL) \
PPC_ORIS(d, d, \
((uintptr_t)(i) >> 16) & 0xffff); \
if ((uintptr_t)(i) & 0x000000000000ffffULL) \
PPC_ORI(d, d, (uintptr_t)(i) & 0xffff); \
- } } while (0);
+ } } while (0)
#ifdef CONFIG_PPC64
#define PPC_FUNC_ADDR(d,i) do { PPC_LI64(d, i); } while(0)
--
2.8.2
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