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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-06-03 18:52:37 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-06-07 13:10:32 -0700 |
| commit | c28db9cb29a7d6cf3ce08fd8445e6b7dea03f35b (patch) | |
| tree | cf086f341e58cc61f200e56b4e05fb0247de8b3c | |
| parent | 56da3fe1dd075285fa8186d44b3c28e68c687e62 (diff) | |
| download | glibc-c28db9cb29a7d6cf3ce08fd8445e6b7dea03f35b.tar.xz glibc-c28db9cb29a7d6cf3ce08fd8445e6b7dea03f35b.zip | |
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>
| -rw-r--r-- | sysdeps/x86_64/sysdep.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h index 4f512d5566..7f5defa4ec 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 |