diff options
Diffstat (limited to 'libc/string/x86_64/strchr.S')
| -rw-r--r-- | libc/string/x86_64/strchr.S | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libc/string/x86_64/strchr.S b/libc/string/x86_64/strchr.S index c357bfd03..9ef46b7f2 100644 --- a/libc/string/x86_64/strchr.S +++ b/libc/string/x86_64/strchr.S @@ -92,7 +92,8 @@ ENTRY (BP_SYM (strchr)) each of whose bytes is C. This turns each byte that is C into a zero. */ - .p2align 4 + /* Next 3 insns are 10 bytes total, make sure we decode them in one go */ + .p2align 4,,10 4: /* Main Loop is unrolled 4 times. */ /* First unroll. */ @@ -230,8 +231,11 @@ ENTRY (BP_SYM (strchr)) reversed. */ - .p2align 4 /* Align, it's a jump target. */ -3: movq %r9,%rdx /* move to %rdx so that we can access bytes */ + /* Align, it's a jump target. */ + /* Next 3 insns are 9 bytes total, make sure we decode them in one go */ + .p2align 4,,9 +3: + movq %r9,%rdx /* move to %rdx so that we can access bytes */ subq $8,%rax /* correct pointer increment. */ testb %cl, %cl /* is first byte C? */ jz 6f /* yes => return pointer */ @@ -281,7 +285,7 @@ ENTRY (BP_SYM (strchr)) incq %rax 6: - nop + /* nop - huh?? */ retq END (BP_SYM (strchr)) |