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-rw-r--r--sysdeps/x86_64/memrchr.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/x86_64/memrchr.S b/sysdeps/x86_64/memrchr.S
index 81b7a1c320..70adca379c 100644
--- a/sysdeps/x86_64/memrchr.S
+++ b/sysdeps/x86_64/memrchr.S
@@ -282,6 +282,9 @@ L(return_null):
.p2align 4
L(length_less16_offset0):
+ test %edx, %edx
+ jz L(return_null)
+
mov %dl, %cl
pcmpeqb (%rdi), %xmm1