diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp-evex.S | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/sysdeps/x86_64/multiarch/strcmp-evex.S b/sysdeps/x86_64/multiarch/strcmp-evex.S index 0bea318abd..b68e1f7a1e 100644 --- a/sysdeps/x86_64/multiarch/strcmp-evex.S +++ b/sysdeps/x86_64/multiarch/strcmp-evex.S @@ -646,12 +646,13 @@ L(loop_cross_page): in YMM3 and 32 bytes at VEC_SIZE(%rdx, %r10). */ VPCMP $0, VEC_SIZE(%rdx, %r10), %YMM3, %k3{%k4} kmovd %k3, %edi + /* Must use notl %edi here as lower bits are for CHAR + comparisons potentially out of range thus can be 0 without + indicating mismatch. */ + notl %edi # ifdef USE_AS_WCSCMP /* Don't use subl since it is the upper 8 bits of EDI below. */ - notl %edi andl $0xff, %edi -# else - incl %edi # endif # ifdef USE_AS_WCSCMP @@ -733,12 +734,13 @@ L(loop_cross_page_2_vec): in YMM1 and 32 bytes at (VEC_SIZE * 3)(%rdx, %r10). */ VPCMP $0, (VEC_SIZE * 3)(%rdx, %r10), %YMM1, %k3{%k4} kmovd %k3, %edi + /* Must use notl %edi here as lower bits are for CHAR + comparisons potentially out of range thus can be 0 without + indicating mismatch. */ + notl %edi # ifdef USE_AS_WCSCMP /* Don't use subl since it is the upper 8 bits of EDI below. */ - notl %edi andl $0xff, %edi -# else - incl %edi # endif # ifdef USE_AS_WCSCMP |