From: "H.J. Lu" <hjl.tools@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH] x86-64: Use testl to check __x86_string_control
Date: Sat, 28 Aug 2021 06:15:30 -0700 [thread overview]
Message-ID: <20210828131530.539387-1-hjl.tools@gmail.com> (raw)
Use testl, instead of andl, to check __x86_string_control to avoid
updating __x86_string_control.
---
sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
index 9f02624375..abde8438d4 100644
--- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
@@ -325,7 +325,7 @@ 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)
+ testl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip)
jz 3f
movq %rdi, %rcx
subq %rsi, %rcx
@@ -333,7 +333,7 @@ L(movsb):
# endif
1:
# if AVOID_SHORT_DISTANCE_REP_MOVSB
- andl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip)
+ testl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip)
jz 3f
movq %rsi, %rcx
subq %rdi, %rcx
--
2.31.1
next reply other threads:[~2021-08-28 13:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-28 13:15 H.J. Lu [this message]
2021-08-30 17:35 ` Carlos O'Donell
2021-08-31 15:10 ` H.J. Lu
2022-04-29 22:07 ` Sunil Pandey
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