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-rw-r--r--sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
index a783da5de2..9f02624375 100644
--- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
@@ -325,12 +325,16 @@ L(movsb):
/* Avoid slow backward REP MOVSB. */
jb L(more_8x_vec_backward)
# if AVOID_SHORT_DISTANCE_REP_MOVSB
+ andl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip)
+ jz 3f
movq %rdi, %rcx
subq %rsi, %rcx
jmp 2f
# endif
1:
# if AVOID_SHORT_DISTANCE_REP_MOVSB
+ andl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip)
+ jz 3f
movq %rsi, %rcx
subq %rdi, %rcx
2:
@@ -338,6 +342,7 @@ L(movsb):
is N*4GB + [1..63] with N >= 0. */
cmpl $63, %ecx
jbe L(more_2x_vec) /* Avoid "rep movsb" if ECX <= 63. */
+3:
# endif
mov %RDX_LP, %RCX_LP
rep movsb