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aarch64/strncmp: Use lsr instead of mov+lsr

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A lsr can do what the mov and lsr did.
This commit is contained in:
Siddhesh Poyarekar 2018-03-15 08:06:21 +05:30
parent 807fee29d2
commit b47c3e7637
2 changed files with 7 additions and 4 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2018-03-15 Siddhesh Poyarekar <siddhesh@sourceware.org>
* sysdeps/aarch64/strncmp.S (strncmp): Use lsr instead of
mov + lsr.
2018-03-15 Rafal Luzynski <digitalfreak@lingonborough.com>
[BZ #22963]

6
sysdeps/aarch64/strncmp.S
View File

@ -208,15 +208,13 @@ L(done):
/* Align the SRC1 to a dword by doing a bytewise compare and then do
the dword loop. */
L(try_misaligned_words):
mov limit_wd, limit
lsr limit_wd, limit_wd, #3
lsr limit_wd, limit, #3
cbz count, L(do_misaligned)
neg count, count
and count, count, #7
sub limit, limit, count
mov limit_wd, limit
lsr limit_wd, limit_wd, #3
lsr limit_wd, limit, #3
L(page_end_loop):
ldrb data1w, [src1], #1