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[RFC,v3,08/14] tcg/s390: Add support for fence

Message ID 20160618040343.19517-9-bobby.prani@gmail.com
State New
Headers show

Commit Message

Pranith Kumar June 18, 2016, 4:03 a.m. UTC 
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
 tcg/s390/tcg-target.inc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Paolo Bonzini June 21, 2016, 7:26 a.m. UTC | #1 
On 18/06/2016 06:03, Pranith Kumar wrote:
> +    case INDEX_op_mb:
> +        /* The host memory model is quite strong, we simply need to
> +           serialize the instruction stream.  */
> +        tcg_out_insn(s, RR, BCR,
> +		     facilities & FACILITY_FAST_BCR_SER ? 14 : 15, 0);
> +        break;
> +

Only for st-ld here, too.

Paolo
diff mbox

Patch

diff --git a/tcg/s390/tcg-target.inc.c b/tcg/s390/tcg-target.inc.c
index e0a60e6..b83b65b 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;
 
@@ -2165,6 +2166,13 @@  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.  */
+        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.  */
@@ -2286,6 +2294,7 @@  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 },
 };