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target/s390x: implement serialization in BRANCH CONDITION

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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170509082800.10756-4-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2017-05-09 10:28:00 +02:00 committed by Richard Henderson
parent 1e8e69f08b
commit 538fad597d
1 changed files with 15 additions and 0 deletions
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15
target/s390x/translate.c
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@ -1518,6 +1518,21 @@ static ExitStatus op_bc(DisasContext *s, DisasOps *o)
int imm = is_imm ? get_field(s->fields, i2) : 0;
DisasCompare c;
/* BCR with R2 = 0 causes no branching */
if (have_field(s->fields, r2) && get_field(s->fields, r2) == 0) {
if (m1 == 14) {
/* Perform serialization */
/* FIXME: check for fast-BCR-serialization facility */
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
}
if (m1 == 15) {
/* Perform serialization */
/* FIXME: perform checkpoint-synchronisation */
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
}
return NO_EXIT;
}
disas_jcc(s, &c, m1);
return help_branch(s, &c, is_imm, imm, o->in2);
}