Messages in this thread | | | From | Eric Dumazet <> | Date | Wed, 24 Nov 2021 22:45:47 -0800 | Subject | Re: [tip:x86/core 1/1] arch/x86/um/../lib/csum-partial_64.c:98:12: error: implicit declaration of function 'load_unaligned_zeropad' |
| |
On Wed, Nov 24, 2021 at 10:32 PM Eric Dumazet <edumazet@google.com> wrote:
> - } > + if (unlikely(odd)) > + result = ror32(result, 8); > return (__force __wsum)result;
Oh well, gcc at least removes the conditional and generates a ror and a cmov
mov %edx,%eax ror $0x8,%eax test %r8,%r8 cmove %edx,%eax ret
clang keeps the cond jmp test $0x1,%dil je 93 rol $0x18,%eax 93: ret
| |