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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-06-23 19:19:34 -0400 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-06-24 19:14:19 -0400 |
| commit | 08cbcd4dbc686bb38ec3093aff2f919fbff5ec17 (patch) | |
| tree | 970437dd91d18f00c146e93265d2b0aeae8f9c1d /misc/swapoff.c | |
| parent | bd3a2b3ed18fdeff0b370110c35850b51d025e8c (diff) | |
| download | glibc-08cbcd4dbc686bb38ec3093aff2f919fbff5ec17.tar.gz glibc-08cbcd4dbc686bb38ec3093aff2f919fbff5ec17.tar.xz glibc-08cbcd4dbc686bb38ec3093aff2f919fbff5ec17.zip | |
x86: Remove unnecessary overflow check from wcsnlen-sse4_1.S
No bug. The way wcsnlen will check if near the end of maxlen is the following macro: mov %r11, %rsi; \ subq %rax, %rsi; \ andq $-64, %rax; \ testq $-64, %rsi; \ je L(strnlen_ret) Which words independently of s + maxlen overflowing. So the second overflow check is unnecissary for correctness and just extra overhead in the common no overflow case. test-strlen.c, test-wcslen.c, test-strnlen.c and test-wcsnlen.c are all passing Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'misc/swapoff.c')
0 files changed, 0 insertions, 0 deletions