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[Qemu-devel] [PULL 9/9] target/s390x: implement serialization in BRANCH
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 9/9] target/s390x: implement serialization in BRANCH CONDITION |
Date: |
Fri, 12 May 2017 16:40:09 -0700 |
From: Aurelien Jarno <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target/s390x/translate.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 3a0a3ee..4c48c59 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -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);
}
--
2.9.3
- [Qemu-devel] [PULL 0/9] Queued s390 patches, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 1/9] target/s390x: Implement STORE FACILITIES LIST EXTENDED, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 2/9] target/s390x: Implement LOAD PROGRAM PARAMETER, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 4/9] target/s390x: Implement LOAD PAIR DISJOINT, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 3/9] target/s390x: Diagnose specification exception for atomics, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 5/9] target/s390x: Use atomic operations for COMPARE SWAP, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 6/9] target/s390x: Use atomic operations for LOAD AND OP, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 7/9] target/s390x: mask the SIGP order_code using SIGP_ORDER_MASK, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 8/9] target/s390x: fix SIGNAL PROCESSOR return value, Richard Henderson, 2017/05/12
- [Qemu-devel] [PULL 9/9] target/s390x: implement serialization in BRANCH CONDITION,
Richard Henderson <=
- Re: [Qemu-devel] [PULL 0/9] Queued s390 patches, Stefan Hajnoczi, 2017/05/15