@@ -156,6 +156,9 @@ END (__mempcpy_chk_erms)
/* Only used to measure performance of REP MOVSB. */
ENTRY (__mempcpy_erms)
movq %rdi, %rax
+ /* Skip zero length. */
+ testq %rdx, %rdx
+ jz 2f
addq %rdx, %rax
jmp L(start_movsb)
END (__mempcpy_erms)
@@ -167,6 +170,9 @@ END (__memmove_chk_erms)
ENTRY (__memmove_erms)
movq %rdi, %rax
+ /* Skip zero length. */
+ testq %rdx, %rdx
+ jz 2f
L(start_movsb):
movq %rdx, %rcx
cmpq %rsi, %rdi
@@ -128,6 +128,11 @@ END (__memset_chk_erms)
/* Only used to measure performance of REP STOSB. */
ENTRY (__memset_erms)
+ /* Skip zero length. */
+ testq %rdx, %rdx
+ jnz L(stosb)
+ movq %rdi, %rax
+ ret
# else
/* Provide a hidden symbol to debugger. */
.hidden MEMSET_SYMBOL (__memset, erms)