system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-10-18 00:43:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

target-i386: Avoid repeated calls to the bnd_jmp helper

Browse source 
Two flags were tested the wrong way.

Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1456845145-18891-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
[rth: Fixed enable test as well.]
This commit is contained in:
Paolo Bonzini 2016-03-01 16:12:25 +01:00 committed by Richard Henderson
parent 618a5a8bc5
commit 8b33e82b86
1 changed files with 5 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
target-i386/translate.c
View file

@ -2409,12 +2409,12 @@ static void gen_reset_hflag(DisasContext *s, uint32_t mask)
/* Clear BND registers during legacy branches. */
static void gen_bnd_jmp(DisasContext *s)
{
/* Do nothing if BND prefix present, MPX is disabled, or if the
BNDREGs are known to be in INIT state already. The helper
itself will check BNDPRESERVE at runtime. */
/* Clear the registers only if BND prefix is missing, MPX is enabled,
and if the BNDREGs are known to be in use (non-zero) already.
The helper itself will check BNDPRESERVE at runtime. */
if ((s->prefix & PREFIX_REPNZ) == 0
&& (s->flags & HF_MPX_EN_MASK) == 0
&& (s->flags & HF_MPX_IU_MASK) == 0) {
&& (s->flags & HF_MPX_EN_MASK) != 0
&& (s->flags & HF_MPX_IU_MASK) != 0) {
gen_helper_bnd_jmp(cpu_env);
}
}