diff options
Diffstat (limited to 'libc/bionic/wctype.cpp')
| -rw-r--r-- | libc/bionic/wctype.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libc/bionic/wctype.cpp b/libc/bionic/wctype.cpp index 061f55a90..082dadaf4 100644 --- a/libc/bionic/wctype.cpp +++ b/libc/bionic/wctype.cpp @@ -129,7 +129,9 @@ wint_t towlower(wint_t wc) { wint_t towupper(wint_t wc) { if (wc < 0x80) { - if (wc >= 'a' && wc <= 'z') return wc & 0xdf; + // Using EOR rather than AND makes no difference on arm, but saves an + // instruction on arm64. + if (wc >= 'a' && wc <= 'z') return wc ^ 0x20; return wc; } |