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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.

(cherry picked from commit b47c3e7637efb77818cbef55dcd0ed1f0ea0ddf1)
This commit is contained in:
Siddhesh Poyarekar 2018-03-15 08:06:21 +05:30 committed by Wilco Dijkstra
parent e0a0bd3acc
commit 0fc5934ebd
2 changed files with 7 additions and 4 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2019-09-06 Siddhesh Poyarekar <siddhesh@sourceware.org>
* sysdeps/aarch64/strncmp.S (strncmp): Use lsr instead of
mov + lsr.
2019-09-06 Siddhesh Poyarekar <siddhesh@sourceware.org>
* sysdeps/aarch64/strncmp.S (strncmp): Use a separate shift

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