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authorPranith Kumar <bobby.prani@gmail.com>2016-07-14 16:20:20 -0400
committerRichard Henderson <rth@twiddle.net>2016-09-16 08:12:11 -0700
commitc9314d610e0e5da4d2cd5a36f3563d102b3294e0 (patch)
tree1a2faccd4e7a50bff616b0dce4a5a85261b68130 /tcg
parent7b4af5ee8a1336bc39714b6de47924ee71fba761 (diff)
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tcg/s390: Add support for fence
Cc: Alexander Graf <agraf@suse.de> Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Message-Id: <20160714202026.9727-9-bobby.prani@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/s390/tcg-target.inc.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/tcg/s390/tcg-target.inc.c b/tcg/s390/tcg-target.inc.c
index f0c88de..253d4a0 100644
--- a/tcg/s390/tcg-target.inc.c
+++ b/tcg/s390/tcg-target.inc.c
@@ -343,6 +343,7 @@ static tcg_insn_unit *tb_ret_addr;
#define FACILITY_EXT_IMM (1ULL << (63 - 21))
#define FACILITY_GEN_INST_EXT (1ULL << (63 - 34))
#define FACILITY_LOAD_ON_COND (1ULL << (63 - 45))
+#define FACILITY_FAST_BCR_SER FACILITY_LOAD_ON_COND
static uint64_t facilities;
@@ -2169,6 +2170,15 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tgen_deposit(s, args[0], args[2], args[3], args[4]);
break;
+ case INDEX_op_mb:
+ /* The host memory model is quite strong, we simply need to
+ serialize the instruction stream. */
+ if (args[0] & TCG_MO_ST_LD) {
+ tcg_out_insn(s, RR, BCR,
+ facilities & FACILITY_FAST_BCR_SER ? 14 : 15, 0);
+ }
+ break;
+
case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
case INDEX_op_mov_i64:
case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */
@@ -2290,6 +2300,7 @@ static const TCGTargetOpDef s390_op_defs[] = {
{ INDEX_op_movcond_i64, { "r", "r", "rC", "r", "0" } },
{ INDEX_op_deposit_i64, { "r", "0", "r" } },
+ { INDEX_op_mb, { } },
{ -1 },
};