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cbcond combines a compare with a branch into a single instruction. The limitations are: 1) Only newer chips support it 2) For immediate compares we are limited to 5-bit signed immediate values 3) The branch displacement is limited to 10-bit signed 4) We cannot use it for JSET Also, cbcond (unlike all other sparc control transfers) lacks a delay slot. Currently we don't have a useful instruction we can push into the delay slot of normal branches. So using cbcond pretty much always increases code density, and is therefore a win. Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| bpf_jit_32.h | ||
| bpf_jit_64.h | ||
| bpf_jit_asm_32.S | ||
| bpf_jit_asm_64.S | ||
| bpf_jit_comp_32.c | ||
| bpf_jit_comp_64.c | ||
| Makefile | ||