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>

diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h
index 4f512d5566b797fa2a690cc13646888804c69df1..7f5defa4ecd45d1acc2aae894847ea6e56120e1e 100644 (file)
--- 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