diff options
| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2016-06-22 19:25:03 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-06-24 08:15:04 +0300 |
| commit | b1a057879af03f6e3b1700c909a6d089e83d1254 (patch) | |
| tree | be16878f5cdb461040d2d217dc1d0a88fcf6b2b0 /arch/powerpc/net | |
| parent | aaf2f7e09932a08c1287d8e4c602bccbe98f60a6 (diff) | |
| download | linux-b1a057879af03f6e3b1700c909a6d089e83d1254.tar.xz | |
powerpc/bpf/jit: Optimize 64-bit Immediate loads
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.
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/net')
| -rw-r--r-- | arch/powerpc/net/bpf_jit.h | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h index a9882db9ecaa..4c1e055ecd01 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) |