You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
1.1 KiB
33 lines
1.1 KiB
commit 820504e3edd7276bf869d543ad5b57187ff9c9b6 |
|
Author: Noah Goldstein <goldstein.w.n@gmail.com> |
|
Date: Fri Jun 3 18:52:37 2022 -0500 |
|
|
|
x86: ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST expect no transactions |
|
|
|
Give fall-through path to `vzeroupper` and taken-path to `vzeroall`. |
|
|
|
Generally even on machines with RTM the expectation is the |
|
string-library functions will not be called in transactions. |
|
Reviewed-by: H.J. Lu <hjl.tools@gmail.com> |
|
|
|
(cherry picked from commit c28db9cb29a7d6cf3ce08fd8445e6b7dea03f35b) |
|
|
|
diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h |
|
index 93e44be22e2275f1..04478b097cdffe20 100644 |
|
--- a/sysdeps/x86_64/sysdep.h |
|
+++ b/sysdeps/x86_64/sysdep.h |
|
@@ -99,11 +99,11 @@ lose: \ |
|
to avoid RTM abort triggered by VZEROUPPER inside transactionally. */ |
|
#define ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST \ |
|
xtest; \ |
|
- jz 1f; \ |
|
- vzeroall; \ |
|
+ jnz 1f; \ |
|
+ vzeroupper; \ |
|
ret; \ |
|
1: \ |
|
- vzeroupper; \ |
|
+ vzeroall; \ |
|
ret |
|
|
|
/* Can be used to replace vzeroupper that is not directly before a
|
|
|